CN101630259B - Transparent EJB supports and horizontal data is split - Google Patents

Abstract

The present invention relates to transparent EJB support and horizontal data segmentation, relate to a kind of application development using public object framework (COF).Specifically, the present invention relates to be used for COF actually with the aspects such as the component model of measured server end and remote method invocation (RMI) protocol-compliant.The other side of the present invention relates in intermediary service application layer, i.e. on database layer, data base is carried out horizontal segmentation.Other aspects of the present invention are included in segmentation in object, change histories and the international combination of field.The specific aspect of the present invention is described in claim, specification and drawings.

Description

Transparent EJB supports and horizontal data is split

The application is the divisional application of following application for a patent for invention:

Application number: 03825733.5

The applying date: on August 21st, 2003

Denomination of invention: transparent EJB supports and horizontal data is split

Copyright notice

Disclosed in patent document, a part comprises copyrighted content.Copyright owner do not oppose according to patent and The patent document or the record that occur in trademark office duplicate this patent documentation or patent publication like that, otherwise retain all copyrights.

Technical field

The present invention relates to a kind of application development using public object framework (COF).Specifically, the present invention one side Face relate to being used for COF actually with component model and the remote method invocation (RMI) protocol-compliant of measured server end.This The other side of invention relates in intermediary service application layer, i.e. horizontal segmentation data base on database layer.It is included in object The international combination of interior segmentation, change histories and field is other aspects of the present invention.The specific aspect of the present invention is described in In claim, specification and drawings.

Background technology

Multilamellar application has become with distribution, the common method of reliable and scalable mode configuration service logic.In multilamellar (multi-tiered), in system, system services layer provides data base, transaction processing program and other infrastructure.Intermediate layer carries For arriving the path of service logic.Client layer accesses this service logic.Client layer can have simple or complicated client computer User, or the program of such as Web Service client.Multilamellar application is especially to supporting from single application platform Many clients are highly useful.Multilamellar application may be used for many clients and processes the data of similar structure, and its advantage includes code weight With with flexible.

J2EE and Enterprise JavaBeans^TM(EJB) conduct encapsulates in multilamellar environment and offer business is patrolled Volume, the most integrated for data management mechanism architecture and occur.Application server provides and accesses system service with basic The path of facility.The application management server storage of object or holding to encapsulating service logic and data.See Sun, Simplified Guide to the Java^TM2 Platform, EnterpriseEdition (1999).Microsoft's Competition architecture is known as .NET framework and DCOM.Monson-Haefel, Richard, Enterprise JavaBeans 3d Ed., p.17O ' Reilly (2001).The older framework with some similar characteristics is known as CORBA.

The life cycle of multilamellar, encapsulation service application includes initial exploitation and maintenance subsequently.(in this article, Service application is used for including business and non-commercial applications, and they include the centre of one or more resident so-called service logic Layer.) multilamellar, encapsulation being originally developed of service application can start in OO visual analysis and modeling tool, Develop into relational database mapping by object process, and be configured to multilamellar, the service application of encapsulation.Maintenance can include point The service application assembly that section (staging) and configuration (deployment) have updated.Configuration may need internationalization (to be abbreviated as I18N: " i " and " n " is plus 18 middle letters) dynamic data of such as name of product and description.

Instrument for being originally developed includes visual analyzing and modeling tool, its observe UML (UML) and Produce this language application program to be used and the object-oriented model of data.The visualization that RationalRose is main divides Analysis and modeling tool.Other products includes Enterprise Studio's and NeuVis of VisualAge, Boland of IBM NeuArchitect.Design tool can be also used for visual analyzing and modeling, such as Visio or Flowcharter.

OR instrument can be used for exploitation, and object-oriented model is mapped as relational database.TopLink be by Object-oriented model is mapped to the main tool of relational database.Competitive tools be by SunMicrosystems, IBM, Borland, Oracle, Microsoft, Thought company and Tibco produce.Modeling work including some OR mapping functions Tool is the most limited, and can not perform well in supporting the scope of availability database.

Application server for multilamellar, encapsulation service application can be compatible with J2EE standard or similar standard.With Application server in J2EE and EJB2.0 is by Sun, JBoss.org, Borland, IBM, BEA Systems, Warp Solutions, Macromedia, Oracle and other a lot of companies provide.Application server can rely on various data base Obtain persistence, including the data base provided by Oracle, Microsoft, IBM, Siebel, Sysbase and other company.

Two weakness of the instrument provided are that limited integrated and shortage is to safeguarding and the support of useful properties in configuration. The limited integrated user of meaning needs re-enter data or follow detailed Programming Guide, thus in visual analyzing and modeling The application program developed in instrument and map in OR instrument just can meet the competition of the service application configuration of a multilamellar, encapsulation Standard.Can be used for supporting so that the feature that developer need not utilize existing instrument manually implemented includes segmentation, configuration history Internationalization with dynamic data.Segmentation can include the module tested for live data test new module and configuration.Go through History refers to record this configuration and record segmentation and/or test new module alternatively.One or more base is added to by specifying Language in this language or country or country, the International Support of dynamic data adds the attached of the foreign language translation of support dynamic data Add field and list.

The desired feature not manifested in current system is in intermediate layer horizontal segmentation data, thus data can To be positioned in multiple physical database independent of each other, it might even be possible to be positioned at multiple foundation data in different vendor platforms In storehouse, such as oracle database and SQL Server2000.At this with following, version " 2000 " is only used as reference, is not intended to And limit the software version that can be used for implementing the present invention.Machine for horizontal segmentation existing, that provided by database supplier System uses multiple physical volume in the system of a tight management, and all these volumes are all by the database manager control of supplier System.Such as horizontal segmentation technology, sees Klein, U.S.Pat.No.6453313, Database Management System and Method forDequeuing Rows Published to a Database Table(1992)；Lohman et al., U.S.Pat.No.6112198, Optimization of Data Repartitioning During Parallel QueryOptimization(2000)；Baru et al., U.S.Pat.No.5970495, Method and Apparatus forAchieving Uniform Data Distribution in a Parallel Database System(1999).Just As Klein explains, the transparent horizontal segmentation of large database table between node and equipment in group's machine flexible and Dispersion calculated load.Horizontal segmentation means divided by table or be divided into two or more files, and each part stores to be had The record (tuples) of corresponding key value scope.Such as, each part in two or more parts of a customer table May be used to the record corresponding to the customer name started with the corresponding scope of letter A-L.Table can also come according to cryptographic Hash Segmentation.Such as, using the hash function of recording indexes can have any one in N number of (such as 4) value, a table is permissible Being divided into N number of part, hash function is for determining the part wherein storing each table row.Additionally, each part can be stored in In the different nodes of system or physical equipment, to be beneficially distributed calculated load in this system.

Horizontal segmentation is integrated in intermediate layer rather than database manager and may support multiple visitors to same application Family is useful.

When with the addition of more client or again having split data base, transparent water is divided cut branch equally and is held developer can be made to exempt from In their service logic of amendment.

Therefore, all going out with modeling to each stage that configure and safeguard multilamellar, that encapsulate service application from visual analyzing Show and preferably supported and the chance of Integrated Development.

Summary of the invention

The present invention relates to a kind of application development using public object framework (COF).Specifically, the present invention one side Face relate to being used for COF actually with component model and the remote method invocation (RMI) protocol-compliant of measured server end.This The other side of invention relates in intermediary service application layer, i.e. horizontal segmentation data base on database layer.It is included in object The international combination of interior segmentation, change histories and field is other aspects of the present invention.The specific aspect of the present invention is described in In claim, specification and drawings.

According to the present invention, it is provided that a kind of including the multilamellar service application of at least database layer and intermediary service application layer In carry out horizontal segmentation object across multiple self contained data bases method, including: state at least one object one or more can For the field that special object is distributed to certain database；Set up the connection with multiple data bases, to the plurality of data Object described in storehouse can be by horizontal segmentation；Cache one or more object needing to find, create, right including by horizontal segmentation As；And when finding or create, utilize the field of statement to decompose the certain database belonging to this object, and call number According to this certain database in the layer of storehouse perform described in find or create.

According to the present invention, additionally provide a kind of should at the many layer services including at least database layer and intermediary service application layer The method carrying out horizontal segmentation object across multiple self contained data bases in, including: set up the connection with multiple data bases, to described many At least one object of individual data base can be by horizontal segmentation；Certain database belonging to described object is set；This setting steps it Before or afterwards, cache one or more object needing and finding, create, including described object；And finding or creating Time, call this certain database in database layer and perform to find or create.

Accompanying drawing explanation

Fig. 1 is the high level block diagram of multilamellar application.

Fig. 2 illustrates how to use the EJB on the J2EE server providing intermediate layer to realize public object framework.

Fig. 3 illustrates object and the relation of simple shopping cart application Visualization Model.

Fig. 4 illustrates the CBOF label 401 in the pop-up window added to for specifying class feature.

Fig. 5 illustrates the CBOF label 401 added in the pop-up window of assigned operation characteristic.

Fig. 6 illustrates the CBOF model that may be used for EJB shell.

Fig. 7 illustrates for supporting class CmoBase701 of EJB and J2EE, CmsBase702 and CmoAttribute703 The class figure of aspect.

Fig. 8-10 illustrates that EJB and J2EE support is suitable for by COF instrument and model.

Figure 11 briefly shows horizontal segmentation.

Figure 12 illustrates the class that can be used for realizing horizontal segmentation in TopLink environment in intermediate layer.

Detailed description of the invention

Detailed description below is made referring to the drawings.Preferred embodiment illustrates the present invention, but is not limited to by right Require limited range.Those skilled in the art is it is known that change various equivalences described below.

Fig. 1 illustrates J2EE and the EJB standard initiated by Sun, and they may be used for one embodiment of the present of invention.See The The J2EE Tutorial of Bodoff et al., p.10 Addison Wesley (2002).Module in Fig. 1 is explained by Sun As follows.Part when J2EE server 120 is the operation of J2EE product.J2EE server provides Enterprise Java Bean container 125 and Web container 121, and manage the access to underlying database layer 130.Enterprise JavaBeans (EJB) container 125 manages J2EE The execution of enterprise's bean (enterprise beans) of application.Enterprise's bean 126,127 and container 125 thereof are at J2EE server 120 Upper operation.Web container 121 manages JSP page 123 applied for J2EE and the execution of servlet 122 assembly.Web assembly 122,123 and container 121 run on J2EE server 120.Application client container 113 manages application client 112 groups The execution of part.Application client 112 and container 113 thereof run in client computer 110.Applet Container Management applet holds OK.This container includes web browser 111 and one or more java plug-in program run in client computer 110.

More putting it briefly, Fig. 1 is illustrated based on component model and the remote method invocation (RMI) agreement of the server end of standard. The .NET framework of Microsoft includes similar assembly with CORBA.Monson-Haefel, EnterpriseJavaBeans, pp.5-18.The aspect of the present invention and standard are compatible, current version when wherein these aspects are to indicate here or to submit the application Or version subsequently meets any version or the derivant of this standard.Essence compatibility is very useful, it is not necessary to all compatible.? Recognize that completely compatible with standard is considered as the feature of unwanted standard sometimes for realizing, this cost is too big or change not Fixed.Additionally, it is also recognized that some enforcement can include may being introduced for strengthening product and along with standard evolution and user adhere to Law support is possible and becomes off-gauge feature.Standard mean to cover specification that such as EJB etc. controls by committee and The specification that such as .NET framework etc. are controlled by supplier.

Fig. 2 illustrates how to use the EJB on the J2EE server providing intermediate layer to implement public object framework.Fig. 2's A lot of assemblies and the component matching of Fig. 1, and indicate according to Fig. 1.In fig. 2 it is described that web container and enterprise's bean Content.In web container 121, application include public object framework (COF) 240A, role apply 241, web services engine 242 With cooperating process manager 243.COF provides for persistable object and supports and provide the access to it, applies 241 reducing role Developer processes the needs of persistence, transaction management and inter-related task.By using the application and the Shen merged by quoting Method described in please, COF can support segmentation, change histories, internationalization and horizontal segmentation alternatively.Web service engine 242 It is for providing the assembly of web services by Commerce One with cooperating process manager；These application in web container Details is immaterial to the invention.But, cooperating process manager 243 is connected to the filled arrows of COF240A and incites somebody to action CPM243 be connected to COF240B and EJB127 Enterprise Java Bean container shown in phantom 124 provide service and data support replace The option of the service that the COF240A code in web container 121 is provided.By the COF code in Web container 121 and enterprise's bean 126 be labeled as similarly 240A, 240B means represent COF code can pack for EJB processs, and change with little or no There is in the case of rewriteeing COF code the compatible interface of EJB.As it can be seen, COF can obtain in web container or Enterprise Java Bean container ?.Application can access the COF assembly in two containers.Application terminals simultaneously or concurrently can be carried out actively with two set COF assemblies Session.Although Fig. 2 is shown in the enforcement in the linguistic context of EJB environment, it will also be recognized by those skilled in the art that identical method May be used for other measured server-side component model and remote method invocation (RMI) agreement, such as DCOM.

So-called public object framework provide the whole software life-cycle for managing business object basic to realize and Instrument, this is described in more detail in the application merged.This includes that design, uml model, complete code and data base produce Raw, these all include transparent internationalization, segmentation, change histories and custom attributes.For ongoing to relying on data base's The maintenance of code, data and pattern provides instrument.The kind of public object frame assembly includes utility program (utilities) Storehouse, business object framework and system management facility.Utility program library component includes the utility program of common code level, as Exceptions (international) (exception), Logging (daily record), Cryptography (password) and Configuration (join Put) access.Utility program library component also includes internationalization function, such as explorer, date, numerical value and text.Business object Framework be used for designing business object, produce for continuing, internationalization, data sectional, vncsion history, Dynamic Customization attribute and complete Create/read/update/delete the code of (CRUD) function.This framework also includes extending any business object, across multiple services The support of the cache coherency of device and scheduler program.System management facility is set up on the basis of business object framework, bag Include the data organizing tool changed for the release creating data base, loading data, renewal database schema and more new data.Also Have for the extraction procedure with localization tool bag and the installation procedure of internationalizing.

COF or the COF of standard compatibility that EJB is compatible can be realized by various component softwares and alternatively real with them Existing.The generation of the design of object model and code or metadata (machine-readable data) can use Rational Rose 2001a or more highest version realize.At this with following, version " 2001a " is also served only for reference, is not meant to can be used for reality The version of the software executing aspect of the present invention limits.When using Rational Rose, an addition Item is installed figure is provided Function that is shown in 4-5 and that be explained below.TopLink3.6.1, SQL Server 2000, Oracle 8.1.7 can be used Or the suitable JDBC driver of DB2 and such as I-netOPTA4.15, Seropto or IDS JDBC Lite3.5.4 reflects Penetrate, create and access data base.The Enterprise Java Bean container of such as WebSphere and WebLogic7.0 can be used.

The new of COF compatible for EJB and the module strengthened can be combined by multiple useful mode.These modules generate remotely With local EJB interface, thus any COF object can be accessed as EJB and use.They use TOPLink4.0 to make For OR mapping tool, it is provided that the access to the EJB-QL as the query language for finding object.These module management data Storehouse server session, including supporting the horizontal segmentation accessed while multiple data bases and to data.Pass between data base System cannot be supported.The application to conducting interviews any object of these modules provides client session.They are loss Data base connects the configurable retry mechanism of offer.They are supported and affairs based on EJB JTA and between database server Unique uniquely coupled object identifier carries out integrated, with the object of reservation identifier realize level when migrating between data base Segmentation.Object change event message as Object Creation, update and deletes configurable event generation.There is provided to the object realized Check, for rear Object Creation, front object updates, rear object refreshes and front object is deleted.Provide for Rational Rose Design and Code Generator.Data base creates instrument design based on visual model and generates data base or DDL script.Work Tool produces application server configuration describer by the EJB generated.Support that WebLogic6.1sp2 and WebSphere 5.0 (needs Want the support of EJB2.0spec).

Fig. 3 illustrates object and the relation of the simple shopping cart application of visual model.Model in this figure be utilize for UML (UML) symbol of class figure creates.In this embodiment, CmsCart object 301 is for providing multiple side exposed Method.CmsCart rather than CmoCart object is used to mean that this object exists during session, and to later session not Being lasting, this is contrary with client and order, and the latter is lasting.Shopping cart 301 can by order 311 with CmoOrder pair As 303 associations.In this embodiment, an order object relates to a shopping cart.CmoOrder object 303 should pass through in the completed CmoCustomer object 302 associates with client 313.Along the opposite direction of this relation, continuing client 302 can be by 312 with more than One order 303 associates.Order 303 comprises one or more CmoProductLineItem object 305.Relational term 314 will be ordered Single 303 are connected with its line project 305.Line project 305 is filled with the product 304 being connected to this line project by product 315 relation.

In UML, the object of such as shopping cart can be modeled as a class.In the case of acquiescence, in the present invention The persistable object of all top (i.e. not having parent) in embodiment is all inherited from the basic object of referred to as CmoBase, as Below by explanation in the context of Fig. 5.Or, temporary object can be inherited from the object of referred to as CmsBase.This base This object can provide in CAT (or unit) file, and this document can be loaded in object modeling program, and is drawn by other class With.This basic class of purpose is that the object to all general common interfaces and realization provides basic function.

The model of the class setting up UML form by object modeling program may comprise steps of.First, bag is created (package) level, with specify such should and the bibliographic structure that produces there.Then class name, class document can be specified And generic attribute.The generic attribute using as shown in Figure 4 and explained later instrument to support includes: lasting, interim, make a summary, give birth to Code, data base's table name, sectional, maximum version number, top layer (Table-Level) constraint database is become (to be such as combined only One constraint), display in the gui, display name, display description, generate and generate EJB.

The attribute of class can be specified below.Can be long with specified attribute name, type, document, database column name, database column Degree, the null value allowed and this attribute are the most unique.Additionally, attribute can be static, final and/or interim.Attribute is permissible It is defined as shielded (protected), thus subclass and reflection code can access these attributes.But, other class and should These attributes of getter and setter way access can only be passed through with code.Support following attribute type: int, boolean, Float, long, short, double, char, String, Date, Time, Timestamp, Interger, Boolean, Float, Long, Short, Double, BigInterger, BigDecimal, Character, Object, byte, Byte, Char, Character, EncryptedString, HashedString and TranslatebleString.

These types can suitably be hinted obliquely at for Java fundamental type, and the latter can be mapped as the class specific to data base Type.The BLOB type that Object, byte, Byte can be mapped as in data base is to store byte stream.Char, Character can With the CLOB type that is mapped as in data base to store big character stream.EncryptedString, HashedString type is Specific type, they are character string, but produced code can encrypt/hash (hash) this value before setting a property, and This code can decipher this value when returning this attribute by getter and setter method.TranslatableString attribute is also Being only a character string, but produced code also produces an add list, row therein represent the translation value of this attribute.This makes The particular community of the class that must specify demonstrates that multiple translation values of this attribute can be to support that localization is stored in data base Object value and exist.

Then the relation of class can be specified.In UML, employing has the straight of the arrow from an object to another object Line comes specified relationship or association.The each party of this association is referred to as role.The class that role name is square equal to " source " of this association Attribute-name.Role should be protected control (the same as attribute).Each role can specify multiformity.Support " 0...1 ", " 1 " and " 0..* "." 0...1 " specifies 0 of object in this role side or the example can be in this relation In.Equally, " 1 " specifies what a example proper of object of this role side should (usually representative and this relation in this relation The row of the association of the class of source side specify not null constraint).Equally, " 0...* " specifies 0 of object or the more example can be at this In relation.This relation being equivalent to comprise an affiliated partner set.

Relation can also be two-way.This means that each party of association can see the opposing party.In two way relation Multifarious any displacement defined above can be there is.Additionally, a side of this relation can be shown as set (coming in relation Represent with opening rhombus in the side of source).The example of " purpose " class that set relations appointment " source " class is proprietary.Thus create and delete Except the example of " purpose " class is the responsibility of " source " class.

Object modeling program allows definition can be arranged on each single bag, class, attribute, relation and relationship role Bells and whistles.To each type of object, can by object modeling program, " CBOF " label be added in attribute, such as figure Shown in 3.It can be the specific properties that arranges of every kind of object that this label is listed.Generate the metadata corresponding to visual model or machine The module of readable data can access any characteristic of any object.Therefore, by adding characteristic, the additional spy of class can be set Property customize the generation of later code, and such other is supported.

Specifically, Rational Rose object modeling program allows to add and comprises the bells and whistles for various objects The extension of value.When creating object model (there is the features such as such as class, attribute, association), can refer on these object models Determine and/or one group of characteristic is set.This group characteristic can extend for the purpose that customizes and add.Fig. 4 illustrates and adds ejection to For specifying the CBOF label 401 of class feature in window.402 feature collections or characteristic subset can be selected to handle.For mould , there is property name 411, value 412 and source 413 (be such as shown as acquiescence or cover) in type characteristic.Control user and handle this A little characteristics.The characteristic with non-default value is runic, is highlighted or focuses on display.

It can be the characteristic added of various types of object that explained below is listed, and one or more for control routine Generation and to class other support mode:

1.Project Properties (project characteristic): think that an object model is one " project ".Therefore, it can The characteristic that some are the overall situation for whole corresponding item objects is set.

The copyright notice of CopyrightNotice (the copyright notice)-covering code output to generate.

The class name of OR map entries class that ProjectName (project name)-covering will be generated.

ProjectDescription (the item description)-OR map entries that will be stored in generation as static variable is set The description of apoplexy due to endogenous wind.

2.Class Properties (class feature): one class can include the uml class object created according to class figure. By clicking on one group of standard feature, can add referred to as the new label of " Cmo ", it has the property that

Generate (generation)-be set to "No" is avoided generating code for some class only existed for achieving purpose.

GenerateEJB-is set to "Yes" and generates the one or more EJB interfaces with class.

TableName-covers the acquiescence table name of class.In default situations, before this capitalization class name, 27 characters are permissible It it is table name.

IsStageable-is set to "false" and avoids generating any pitch capability into this certain kinds, as will be detailed below in detail Describe.

MaxNumVersions-be set greater than 0 with arrange over change number, to keep specific class example.

ReplaceClass-specifies such to realize the complete trails class name of the existing class replaced.

WrapperPackageName-specifies the bag name generating shell (ImplC) class.

ImplPackageName-specifies to generate and persistently realizes and the bag name of major capsid (Impl and ImplW) class.

StageablePackageName-specifies and generates the bag name continuing sectional realization (ImplS).

Constraint1 to Constraint7-specifies the top layer to a class to retrain.Such as " UNIQUE (name, owningMember)”。

IsDisplayed-designates whether to need, in given user interface, class name is shown to user.

DisplayName-covers such acquiescence display name.In default situations, class name is by eliminating any " Cmo " At the capitalization of prefix the most followed by lower case, insertion space generates.

DisplayDescription-arranges the description shoulding be such display.

3.Attribute Properties (attribute characteristic): can be that the attribute of above-mentioned fundamental type adds in certain kinds Additive attribute.Attribute can have referred to as the new label of " Cmo ", has characteristics that

ColumnName-covers this attribute in the acquiescence row name in the table of this Attribute class.In default situations, use It can be row name that ' _ ' separates 30 characters before the capitalization attribute-name of word boundary.

I18NConstraintName-be covered as that these row add _ the DEFAULT constraint name of IN table is (if this attribute is set to Uniquely).

4.Association Properties (associate feature): association can be added between two certain kinds.Association Can include two sides, they are referred to as role.Association itself can have referred to as the new label of " CBOF ", has characteristics that

If RelationTableName-association represent multi-to-multi or unidirectional many-one relationship, then can add centre or " relation " table.This characteristic is set with specified relationship table name.Under default situations, this relation table name attempts to take the class name of this relation both sides And use " TO " in centre.If this title oversize (more than 27 characters), then use the character string being followed by this class name miscellaneous Gather the class name initial (initial of word boundary) of code.

One side of 5.Role Properties (role characteristics): character representation association.One association have role side A and Role side B.Therefore, if adding characteristic to character object, then two additional labels, i.e. " CBOF can be added to associate feature A " and " CBOF B ", have the property that

ColumnName-covers this acquiescence row name being associated in the table of this association class.Under default situations, with ' _ ' divide Before the capitalization role name of word boundary, 30 characters can be row name.

GenerateForeignKeyConstraint-is set to "false", if this side not shoulding be association generates If foreign key constraint.

ForeignKeyConstraintName-covers the acquiescence foreign key constraint name associating this side.

As discussed below, horizontal segmentation can distribute to include a group objects as project characteristic, or special as class Property distributes to include related object.The most all of class, attribute and relation model the most, and code is generated as.

Can also assigned operation, and the characteristic that these operated distributes as shown in Figure 5.CBOF addition Item label 501 is shown. At least two characteristic 521 is to be accessed for, and it indicates whether to generate EJB local interface and/or EJB remote interface.For Each characteristic shows that title 511, value 512 and source 513.More roughly speaking, local interface follows first with less expense Agreement, it is adaptable to reside in calling and invoked object in same web container 121 or same bag.Remote interface is with bigger Expense follows second protocol, it is adaptable to remote method invocation (RMI).Remote method invocation (RMI) agreement is for such as CORBA, JavaRMI, MicrosoftTransaction Server, Microsoft COM/DCOM, Microsoft.NET Framework and Specification and the product of Enterprise JavaBeans (EJB) and provide.The selection generating local and remote interface controls to adjust With exposing of expense and/or interface.

Fig. 6 illustrates the CBOF model that may be used for EJB encapsulation.With reference to Fig. 6, according to embodiments of the invention, object box is shown The block diagram of frame 610.In alternative embodiments, object-oriented framework 610 can include other assemblies various or configuration, with supplement or Replace the assembly that those embodiments combining Fig. 6 are discussed.

The useful aspect that COF/CBOF realizes includes following combination: Rational Rose is used for setting up the model of object, But it is not restricted to object model design；Service logic method generation for customization has the code of placeholder or dash line；Produce Create, read, update and delete (CRUD) when code carrys out the operation of support target, and Rational Rose's is anti-without using To engineering；In addition to user states mapping parameters, with a small amount of or do not have user alternatively to carry out object to relation (OR) mapping； Generate persistence map information so that business object is continued (persist) to relational database；Definition and establishment relation table peace treaty Bundle, including needing for the information creating database schema and this information creating of use and/or the instrument of transplanting data base；Can lead to Straightforward procedure that cross one group of standard API Access, that create, read, update and delete (CRUD) when being used for running, it is thus possible to easily Ground creates, reads, updates and deletes any business object in this framework.Affairs example is used to create, update and delete one Group uses the object of these data base's Atom affairs.The life-span of affairs can be the longest, because data base is until the delivery time Also it is not affected by impact and employs optimization locking.Data sectional, to support at the existing production version not affecting this object In the case of change business object, until test, ratify and configure this change；Data variation history is supported, including any object The monitoring of base attribute change is followed the tracks of；Produce code and information creates and can be used for transparent storage and save turning over of business object Translate the database schema of string attribute；Support to Add New Attribute to any object dynamically at runtime, and do not affect this number According to storehouse pattern；Support target change is noticed, and is creating including being configured to business object have, is updating or delete this object Shi Sheng The option of event become, these event duration are to data base, and can be serviced by event notification and manage, and in business After object builds the most in memory (init ()), after inserting in data base (postInsert ()), adding to After in the affairs updated (postAddForUpdate ()), affairs update (preCommit before data base ()), after loading from data base/refresh (postRefresh ()), finally (preDelete before deleting from data base ()), the method that this business object can also realize performing certain action itself.

In the embodiment in fig 6, one group of 5 basic class shows on transverse axis 614, and can preferably include basic Enliven object class CmoBaseImpl630, basic interface class CmoBase634, basic segmentation class CmoBaseImplS638, basic Internationalization class CmoBaseI18N642 and basic shell class CmoBaseImplW644.These basic class of functions and use outline It is described in the application merged by quoting to property.

In the embodiment in fig 6, one group of root class shows between transverse axis 614 and transverse axis 618, and can preferably include Each root class come from corresponding basic Similar integral above.In the embodiment in fig 6, root class can preferably include root enliven right As class AbstractXImpl646, root interface class AbstractX650, root segmentation class AbstractXImplS654, root internationalization Class AbstractXI18N658, root shell class AbstractXImplW662, root customization class AbstractXImplC666.

In the embodiment in fig 6, one group of subclass shows under transverse axis 618, and preferably includes from correspondence above basic Class and root Similar integral and each subclass of coming.In the embodiment in fig 6, give class preferably include son enliven object class XImpl670, Sub-interface class X674, sub-segmentation class XImplS678, sub-internationalization class XI18N682, subshell class XImplW686 and son customization class XImplC690。

Additionally, in figure 6, above-cited interface class series shows in the left side of the longitudinal axis 622.Shell class series shows Between the longitudinal axis 622 and the longitudinal axis 626.Additionally, be stored persistently in data base 120 one group of class shows on the right side of the longitudinal axis 626.Connect Mouth is to expose to the public Java interface of this system user.These interface definition obtain, arrange, add, delete and custom service The method of logic.The java document that these interfaces also comprise API is for reference.Generate these interfaces, and can not manual modification, Because manual modification will not allow the code regenerated below.

In one embodiment, these classes are mutual with the TopLink as component software.Although explanation below is specific In TopLink, but those skilled in the art is to be understood that identical method may be used for other Database Mapping and pipe Reason module.Continuing class is to describe to realize class to TopLink, as comprising lasting attribute and being mapped to the class of relational database. Three kinds continue class and include Impl, ImplS and I18N.Object in Impl class representation database cuts with effect version really.ImplS class Covering or segmentation version of effective object in representation database.All acquisitions described in the interface class/arrange/add/delete Except method all realizes at these apoplexy due to endogenous wind.All service logics API are all dished out UnsupportedOperationException. I18N class comprises interpretable string attribute and translation place.Impl and ImplS class and I18N class are the relations of one-to-many.Nothing When opinion calls the acquisition/method to set up that can translate string attribute, all accesses according to the current place arranged on thread The suitable example of I18N class.Generate these classes and can not manually change.

Shell class realizes affairs support, segmentation, change histories and custom service logic function.There are two class shell classes: ImplW and ImplC.ImplW class is a kind of abstract class, and it implements the acquisition/setting/interpolation/delet method from interface class. These methods suitably check whether retrieval or arrange Impl object, ImplS object or their suitable TOPLink transactional replication The value of product.Setting/interpolation/delet method is dished out CeNotInTransactionException, without because in affairs Update and if adding this example.If attempting to access that the clone's shell outside affairs, then preparation method will be dished out to have and " be visited Ask invalid shell " CeRuntimeException of message.When accessing or creating any persistable object, ImplC class is real The concrete kind of example.Such is from corresponding ImplW Similar integral.ImplC class can be with manual modification, to comprise any custom service The realization of logical method.ImplW class produces completely along with regenerating every time.ImplC class generally produces once, then conduct The personalization files that can keep and add source control.Note the succession structure of ImplW and ImplC class.ImplW class is from its superclass ImplC inherit.ImplC is from its corresponding ImplW Similar integral.It is also noted that ImplW is not implemented in interface apoplexy due to endogenous wind and retouches Service logic API stated.These API are realized by ImplC class.Class can be stated the most in a model, and this can make ImplC class Abstract.

It is also noted that lasting class and relevant TOPLink transactional replication product can quote its corresponding shell.In TOPLink caching Lasting example point to the read-only version of its shell.Copy points to the rewritable versions of its shell.When giving copy and closing And to time in the caching example of TOPLink, corresponding shell becomes invalid.The shell of copy can quote its correspondence read-only outside Shell, and this can obtain by this shell is called getReadOnlyObject () method.

Need basic class of level to describe this document group.Fig. 6 illustrates the embodiment of this basic class hierarchy.Top at figure There are 5 basic classes: CmoBaseImpl630, CmoBase634, CmoBaseImplW644, CmoBaseImplS638, CmoBaseI18N642。

CmoBase634 is the interface class that all objects 332 are all inherited from it and realized.This interface comprises all right As the 332 all base attributes all must implemented and the descriptions of operation.The various features of this object-oriented framework 610 comprise adds this to Attribute in interface and method, such that it is able to realize these attributes and method in all objects.CmoBase634 also serves as mark Remember the approach of the object 332 generated by the mechanism provided in this framework.Replacement class CmsBase702 can be provided, as it is shown in fig. 7, For need not lasting temporary object.

CmoBaseImplW644 represent include by other realize object (CmoBaseImpl, CmoBaseImplS, What access CmoBaseI18N) carried out packing realizes shell object.CmoBaseImplW class realizes CmoBase interface. The purpose of CmoBaseImplW class determines that Impl (for enlivening object) or which example of ImplS (for segmentation object) Should be called to implement operation.Such has 4 important relationship.LiveObject has the example of CmoBaseImpl object, The latter's representation database mainly enlivens business object.ShadowObject has the example of CmoBaseImplS object, after Person's representation database enlivens covering or segmentation version of business object.When clonedObject put into for create or update After in affairs, this object has the copy of liveObject or shadowObject.When clonedObject comprises During the copy of shadowObject (this occur in order to update in affairs and create and during this object of segmentation), LiveClonedObject has the copy of liveObject.

LiveObject has read-only shell.Shell can be made writeable by adding read-only shell to affairs, this returns one Individual new shell, including the liveObject can being modified in the case of just accessing the user of liveObject not affecting other Copy.When submitting affairs to, this copy is for sending renewal to data base, and these changes is merged into In liveObject.Once have submitted writeable shell, this writeable shell is the most useful, and must access read-only shell (this Writeable shell is made to become rubbish to save memorizer).When implementing any action (create, read, access relation and renewal), Such example returns to user.

CmoBaseImpl630 representation database enlivens persistable object.Such comprises control object and relationship map Characteristic.This information allows to create and includes table, arranges, constrains in interior form.Such is included in the attribute defined in object model, Attribute including representation relation (or there is the single-relation of this object type or use many relations of aggregate type). Such also realizes CmoBase interface 634.Implement attribute and the acquisition of relation and setting, to access relevant attribute or relation.Its He service logic method (the describing in a model) UnsupportedOperationException that dishes out prevents the method Cold call.Only ImplW class should access such, and it should not call any service logic method to Impl class.

CmoBaseImplS638 is exactly substantially the copy of CmoBaseImpl class, but represent Impl strength cover or " segmentation " value.These fragmentation values are stored in a single table, and are single examples, are thus provided that one individually Class represents the segmentation being mapped to this independent table.The use of CmoBaseImplS638 is also in the application merged by quoting It is discussed.

CmoBaseI18N642 is the basic class for International Support.Such have all have can translate string value The base attribute that is required for of table.When generating the Impl class of object, the inner classes come from CmoBaseI18N642 succession is also It is generated, if such has can translate string attribute.The example of CmoBaseI18N 642 can corresponding to Impl class The language translation of translation string attribute.Fragmentation value for this translation provides additional example.Translation list is saved in class layering Every one-level.This allows to add/delete at any time can translate string attribute, and without CmoBaseI18N class and table point Rotating fields.These features record in more detail in the application merged by quoting.

When generating object (such as AbstractX646), the class generated extends the most basic class.Such as Fig. 6 institute Showing, AbstractX646 is the interface inherited from CmoBase basic interface and come.AbstractXImplW 662 from CmoBaseImplW 644 inherits.AbstractXImpl 646 inherits from CmoBaseImpl 630. AbstractXImplS 654 inherits from CmoBaseImplS 638.Additionally, due to there is the word translated of AbstractX Symbol string attribute, AbstractXI18N 658 inherits from CmoBaseI18N 642.

There is also another customization class being referred to as AbstractImplC 666, it is inherited from AbstractXImplW 662 ?.ImplC class comprises the business logic codes specific to user of the service logic method for adding interface in model to. This allows ImplC to can be only generated once, then can only update when needs add, change, or delete business logic codes.Other The type (interface, ImplW, Impl, ImplS, I18N) of class is always given birth to from object model 320 again when each model changes Become.Which solving to generate needs manual customization arbitrarily to need reverse design to the code of the change in model, but also allows for write Can the service logic realization that change over time.The code generated is in need not any writable ImplC Code in the case of just can use.The service logic method specific to user that ImplC is to be achieved provides place.

Additionally, Fig. 6 illustrates that another is referred to as how the class of X further expands AbstractX class.Each generation class of X Type all inherit from the suitable Class Type of AbstractX.But, XimplW686 inherits from AbstractXImplC666 , thus the enforcement of XimplC686 can cover any service logic method of AbstractX class, just look like such It is that direct subclass is such.One aspect of the present invention is to automatically process the succession structure for managing these classes relations and generation The complexity of code.Intuitively, the business logic codes that user has only to be concerned about in the object of visual modeling and ImplC realizes.

Fig. 7 is to illustrate class CmoBase701 for supporting EJB and J2EE, CmsBase702, CmoAttribute703's The class figure of aspect.Lasting, the modifiable object of user is inherited from CmoBase701.But, a lot of attributes can be to face Time and can not be changed by user, therefore their quiescent value can distribute in memorizer create object work replicate Product.These temporal properties can be inherited from CmsBase702, and the latter has and is applicable to provisional characteristic and attribute.Belonging to Property the continuing of level, user can change object and include title, description, version maximum number, notice behavior.CmoBase class 701 includes main Want keyword, " id " i.e. automatically generated.ID is unique for a line in a DB and type.Therefore, completely with complete The unique ID of office connects database identifier, type and id field.The unique identifier of this connection meets the current of unique ID The requirement of EJB2.0.The unique identifier connected is additionally operable to horizontal segmentation discussed below, because the ID in CmoBase701 is only Ensure that be unique in a data base and type.The adeditive attribute of CmoBase701 includes shown state, versioned With segmentation attribute.As shown in Figure 10, structure from CmoBase inherit or corresponding to such CmoBaseLocal with CmoBaseRemote class.CmoAttribute703 supports as object customization attribute, such as institute in the application that merges by quoting Describe.

Fig. 8-10 illustrates that COF instrument and model are supported for EJB and J2EE.Preferably, the business object interface in system Should expand from the javax.ejb.EJBLocalObject1013 of Figure 10.This mode of extension provides at same Java virtual The approach of call method on the EJB object run in machine (JVM), without causing the expense relevant to remote access.Each The business object that individual needs are accessed remotely through computer networks requires that title is identical with local interface and is placed on the independent interface under " ejb " bag. Remote interface extends avax.ejb.EJBObject1012 and only comprises the method that can be accessed remotely through computer networks.Except local and remote Outside interface, ejb explanation needs domestic interface to create and finds ejb object, as shown in Figure 9.Each business object has expansion Open up the local domestic interface 912 of javax.ejb.EJBLocalHome911 and the remote of extension javax.ejb.EJBHome901 Cheng Jiayong interface 902.

The bean class comprising the code implementing service logic generally adds suffix " ImplC " by docking port title orders Name.The most in fig. 8, PersonImplC842 and EmployeeImplC862 is intended to comprise corresponding to Person and Employ The object of the service logic of interface 821,841.It not that all operational approaches in " ImplC " can remotely access.Remote parties Method is implemented by the parameter of nation method and return value are set to serializability (must do so in order to meet EJB).For Realizing this point, framework has suffix " Bean " (such as local generation that can implement additional long-range operational approach PersonBean) class.In addition to providing service logic to implement, also implement multiple answer specific to EJB.These answer logical Cross the javax.ejb.EntityBean interface 1011 in enforcement CmoBaseImplW class (in Fig. 6 644) to be supplied to continue Object.For providing the answer of EJB function to include ejbCreate (), ejbPostCreate (), ejbFindByPrimaryKey (PrimaryKey key), ejbLoad (), ejbStore (), ejbRemove (), ejbActivate (), ejbPassivate (), setEntityContext (EntityContext ctx) and unsetEntityContext ().In these are answered, when Client computer calls ejbCreate () method when calling create () method on domestic interface.EJB (Enterprise Java Bean) container creates bean (ImplC Class) example and on this bean, call ejbCreae () method.Enforcement should provide method for: obtain or create CmoTransaction；This bean is added to these affairs；Initialize shell object；Allocate object ID in advance；Submit affairs to；Return PrimaryKey object.Need the method that overloads under many circumstances, in order to right by initializing in non vacuum data storehouse retrains As required parameter.

This container calls ejbPostCreate () method after calling ejbCreate () method immediately.The method should With ejbCreate (), there is argument as much, and additional initialization is provided and distributes the resource needed within its life-span.

EjbFindByPrimaryKey is called when client computer calls findByPrimaryKey () on domestic interface (PrimaryKey key) method.This realization should provide method for: instruction need not affairs；According to object id in data Storehouse is found this object (using CmoClientSession.findById () method)；And return PrimaryKey object.The party Method needs overload to custom-built query.

EjbLoad () answer method corresponds roughly to " reading " function of entity bean.In the reality realizing aspect of the present invention Execute in example, generally use TOPLink OR to map during create () or find () method and initialize this bean, therefore should Method may be used for some post-processing operation.

EjbStore () answer method corresponds roughly to " renewal " function of entity bean.This function has been encapsulated in us CmoTransaction in, except CmoTransaction need be activated and in order to update needs this object is added to In these affairs, this is true.

EjbRemove () answer method deletes this object from Data Store.CmoTransaction is activated also Add to delete in this object.

During activation processes, the ejbActivate () method on bean example is called, followed by EjbLoad () method.Once bean be activated and its state by appropriate with underlying database recording synchronism, then operational approach continues.Appoint This operational approach is called by subsequently is the most directly entrusted to bean example.

EjbPassivate () uses between deactivation period.During Passivation Treatment, container calls on bean example ejbStore().Bean example is responsible for more new database.After database update, container calls on bean example EjbPassivate () method, allows and oneself has an opportunity before passivation bean to discharge the most allocated any resource.

SetEntityContext (EntityContext ctx) side is called by the linguistic context of bean during bean initializes Method.This linguistic context storage comes for application in the future.UnsetEntityContext () supplements this and arranges linguistic context.If container determines The resource that release is used by bean, then container can collect the bean of merging as collecting rubbish, and in this situation Lower affairs can return non-existent state.In this conversion method, container calls the method.The method release is used by this bean Any resource.

Fig. 8 illustrates that the CBOF object model of compatible EJB is applied to the simple object of personnel and employee, and it has local and remote Journey accesses and interface.Person821,824 and Employee841,834 objects from EJBLocalObject811heEJBObject814 implements.The implementing of native object support local, decrease expense Access.The enforcement of EJBObject supports that remote object accesses.The standard feature of native object is to inherit from CmoBase812 , as mentioned above.In fig. 8, suffix ImplW and ImplC is used for shell and creates enforcement.EntityBean813 passes through CmoBaseImplW822 implements.The enforcement of Person821 and Employee841 object is from CmoBaseImplW822 succession Come.These implement to include PersonImplW832, PersonImplC842, EmployeeImplw852 and EmployeeImplC862.Such as what the context of Fig. 9 was discussed, provide two home object for local and remote interface EJBLocalHome853 and EJBHome833.The enforcement of these home object includes PersonLocalHome863, PersonHome 843, EmployeeLocalHome 864 and EmployeeHome 844.

Fig. 9 summarises a part of Fig. 8, and illustrates and need the example compatible to the conventional EJB in one residence of object.For Remotely and native object and interface 901,911 each provide place.Each business object has and extends The remote domestic interface 902 of javax.ejb.EJBHome 901 and the basis extending javax.ejb.EJBLocalHome 911 Ground domestic interface 912.Long-range and local domestic interface 902,912 is also by CmoApplicationConfigRemoteHome 903 and CmoApplicationConfigLocalHome 913 extend.

Figure 10 also summarises a part of Fig. 8, and illustrates the additional mechanism supporting EJB.Object Javax.ejb.EJBObject1012 and javax.ejb.EJBLocalObject1013 expands to CmoBaseRemote1022 And CmoBaseLocal1023.

The relation of EJB inter-entity is supported in EJB2.0 explanation.3 fundamental relation radixes (one to one, one-to-many and multi-to-multi) All it is supported.Furthermore, it is possible to use the new query language of EJB2.0 explanation to handle these relations.Relation can be by abstract visit Ask that device method manages.In the relation that the multiformity of related object is many, parameter or the return Value Types of abstractions device are Represent the collection class of this relation.This collection class implements java.util.Collection or java.util.Set interface.Optional , these explanations can add java.util.Map and java.util.List as return type.Multiformity in collection class Being in the relation of, parameter or the return Value Types of abstractions device are the single-instances about object.

Relation visitor in COF has the parameter as corresponding objects array or returns Value Types.So that they Can be accessed by ejb by remote interface, it should the addition method of relation is provided in remote interface and implements in ImplW. Such as, Employee To Address Relationship can be one-to-many and be two-way.Local and remote method May be embodied as crossing a relation, such as Employee To AddressRelationship example.Such as, nation method can To include: public Address [] getAddresses ()；public void setAddresses(Address[] address)；public voidaddAddressElement(Address address)；And public BooleanremoveAddressElement(Address address).Remote method can include may include that publicCollection getAddressesRemote()；public void setAddressesRemote (Collectionaddress)；public void addAddressElementRemote(Address address)；With publicBoolean removeAddressElementRemote(Address address)。getAddressesRemote The support of () method obtains the objectId list of all address objects relevant to Employee object.Can use CmoQueryCursor mechanism, because need not buffer any address object.Therefore, from CmoQueryCursor extension, title New class for CmoObjectCursor is created, to support the long-range instruction of EJB example.The method support utilizes remote domestic Interface finds or creates ejb object, and stores them in set.The method returns the set of ejb object. SetAddressesRemote (Collection address) method support utilizes local domestic interface create or find correspondence Ejb object.Object is stored in array by the method.The method is called the nation method of correspondence and is updated.

Affairs support is the important basic service provided by J2EE platform.This explanation describes JavaTransaction API(JTA).JTA is to provide the interface accessing bottom task manager.Some primary interface include: Javax.transaction.UserTransaction and javax.transaction.TransactionManager. UserTransaction exposes to application assembly, and the bottom between J2EE server and JTATransactionManager is handed over Mutual is transparent to this application assembly.TransactionManager implements back-level server to (container is distinguished) transaction boundaries Control.The affairs support of JTA TransactionManager and JDBC is all available for J2EE application assembly. Two kinds of transaction management examples supported by J2EE platform: declarative affairs are distinguished and planned affairs are distinguished.In declarative differentiation, hold Device is responsible for starting, submitting to and rollback affairs.Container starts affairs to the user's each operation on bean.Client computer can If to obtain JTA affairs and to perform the dry run in affairs.This by offer strengthen have between operations dependent certain The motility of individual service logic.Transaction attributes supports that declarative affairs are distinguished, and passes on the meter about EJB assembly method to container Draw affairs behavior.

Affairs differentiation 6 transaction attributes of support to Container Management: Required, RequiresNew, NotSupported, Supports, Mandatory and Never.There is the method for Required transaction attributes in JTA affairs Perform；According to circumstances, new affairs linguistic context cannot maybe can be created.If invocation component associates with JTA affairs, then hold The method that device will be invoked in described affairs linguistic context.Associate with invocation component without affairs, then container will automatically create newly Affairs linguistic context, and attempt to submit this things to when the method completes.According to having the method for RequiresNew transaction attributes in new thing Business linguistic context performs.If invocation component associates with affairs linguistic context, then creating new affairs linguistic context, the method is at new affairs language Performing in border, the method restarts the affairs of this invocation component after completing.The method with NotSupported transaction attributes It it not a part for affairs.If invocation component associates with affairs linguistic context, then container suspends this affairs, call not with affairs The method of association, and the affairs of invocation component are restarted when the method completes.The method with Support transaction attributes is propped up Hold the transaction status of invocation component.If invocation component does not has any affairs linguistic context, then container will perform the method, just look like it Transaction attributes is NotSupported.If invocation component associates with affairs linguistic context, then container will perform the method, seem Its transaction attributes is Required.The method with Mandatory transaction attributes is adjusted from the affairs linguistic context of this invocation component With.Otherwise, container will be dished out javax.transaction.TransactionRequiredException.There is Never thing The method of business attribute never should be called from the affairs linguistic context of invocation component.

Planned transaction differentiation is the hard code of the transaction management in application code.Planned transaction is distinguished Session EJB, Servlet and Jsp assembly is feasible option.Planned transaction can be JDBC or JTA affairs.Session for Container Management EJB, can (although at all not recommending) mixing JDBC and JTA affairs.

One aspect of the present invention is can be with segmentation creation data.In data base, asking of repeated work is never made for solution Topic, the fragmentation value of these data is stored in the data base identical with effective production value by an embodiment.But, this fragmentation value Should not be present in the table identical with effective production value.If segment data is in identical table, then the performance of table and size Will be affected.Therefore, for each object needing pitch capability, data base can exist two tables.Due to then Needing add list, therefore OR mapping tool needs another java class to represent this table.For the Impl class of sectional, deposit In corresponding ImplS class.Class formation and OR mapping is automatically processed, it is therefore desirable to add add list together with creating with sheet format And/or the effort of class is actually reduced.

Copy to existing object properties new object is typically very directly simple.But, segmentation may also be supported The change of relation between object.In order to support all segmentation features, need to define some rules:

1. the active object instance that produces can quote its fragment instance.Can only be segmented at certain time object and once (change Sentence is talked about, and the relation between this object and its fragment instance is man-to-man two-way privately owned relation).

The most once by object fragments, its effective example cannot be revised.If this effective example can be changed, then need by The change carried out in fragmentation value merges with virtual value.Generally, change needs are segmented or are directly enlivening amendment on object, it is impossible to Both carry out.

3. relation is for effective example rather than for fragment instance.Otherwise, a lot of relationship map are necessary for being managed Reason (effectively to segmentation, effectively to effective, segmentation to effective and segmentation to segmentation).Additionally, change to effectively from segmentation when object or Otherwise, the relation just for this object needs to manage this change.This rule simplifies these problems.Additionally, be cited is effective Example with segmentation, and can quote its fragment instance, the most still supports various relation, but is not direct.

4. segmentation change must be a part for sectional project.The method managing a set of segmentation change is they to be combined In same container.All objects that sectional project tracking has been segmented into.Then this project can be configured for testing, or Delete it.

5. can only be segmented once at certain time object, and be a part for single sectional project.Management merges Typically also without.

Support one-one relationship in segmentation table owing to above-mentioned rule #3 is easily.All relations all refer to effective reality Example, the segmentation tabular therefore pointing to another object has only to point to effective example of this another object.Many-one relationship must make Use intermediate interactions table, even if this relation is two-way.This prevent and enliven Object table and have to be understood that any pass with fragment instance System.

Many-to-many relationship also has the intermediate interactions table that fragment instance is linked to effective example.These intermediate interactions tables must Must be from existing to enliven object relation table different.If many-to-many relationship is two-way, then need to create two intermediate interactions tables, One is used for each direction.This is because this relation can be segmented from either party of this relation, and there is different values.Attached Add relation table automatically and to effectively generate.

Other aspects of the present invention are the horizontal segmentation in intermediate layer, as with so-called back-office i.e. database layer phase To.Figure 11 briefly shows horizontal segmentation.In this embodiment, object model includes that assembly 1 (1101) is to n (1102), account 1102 And BI1104.Assembly 1 is mapped to main 1111 data bases, and the latter is centralized database.By between data base by horizontal segmentation, Assembly n is mapped to master 1111 and main 1112 data bases.Assembly n can be single object or a group objects.For bag and specify by This group objects carries out the instrument of horizontal segmentation may be very useful.Described above is this instrument for arranging project characteristic, and And be very familiar with for the user of Rational Rose.Or, it is provided that for object is distributed to one group or many Group, the group default properties that then setting will not be capped or the instrument of group global property.In any one embodiment, as list One result arranged makes a group objects be very use by (or not being subject to) horizontal segmentation.The mapping of assembly 1...n is in this embodiment Can be configured by database description.The explanation side of table or user readable (such as XML) configuration file that such as user completes Method may be used for the logical name of specified database and/or is connected with object and object group by the logical name of data base.At this In example, account and BI have been respectively mapped to safety 1113 and BI1114 data bases.

Support that the class carrying out horizontal segmentation in intermediate layer is applicable to and data base or the interface of data basic structure, in this example In be applicable to the interface with TopLink.Figure 12 illustrates the class that may be used in the segmentation of intermediate layer carrying out horizontal.This figure is on left top It is initially with CmoServerSession1221 and is easy to allow people understand.This object has the data base that this basic structure needs Connect and information.Owing to the logical identifier of data base is static, therefore this object can have static data and static method, And can be shared by multiple users.CmoSystemSession1231 can obtain from server session 1221.Have only to for Server creates single system session object, and CmoClientSession object 1241 has each use for this server The linguistic context at family and status information.This object has place and the registration of the information specific to user, such as user.Holding is similar to Status information for the status information that http session keeps.Method getDb and setDb are used for arranging language ambience information.Client computer meeting Words can relate to some data bases.Relation # between client session 1241 and any alive data storehouse session 1242 DbClientSessions is 0...* relation.It is effective for not having database client session when obtaining client session.? During the life of client session, a lot of database client sessions can become effective.

CmoTransaction 1251 target cache in the figure is by by the data of horizontal segmentation. The role of CmoTransaction is to maintain the state of affairs, including the affairs that the life-span is the longest, until these affairs are ready to submit to Till.Owing to collecting this affairs, therefore collect the information allowing decision which data base new or amended object belongs to. When these affairs are ready to submit to, it can be by CmoDatabaseTransaction 1252 in one or more data bases One or more examples submit to.

Horizontal segmentation is supported, can add basis to including middle column object 1212,1222,1232,1242 and 1252 and connect In the existing arrangement of mouthfuls 1223,1243,1253 and the session 1221,1241,1251 that exposes, without changing outside these sessions Dew mode or change the operable service logic of object that these sessions expose.Such as, horizontal segmentation may be used for supporting two Use same code and automaker F and G of software.All data for F can such as be divided into Oracle number According to storehouse, all data for G can be divided into SQL database.It is provided with linguistic context F or G once such as log in user, The segmentation of data is exactly transparent for system.All call F data is all carried out for oracle database, and owns G data is called and all carries out for SQL database.Identity logic can be applied, be available to F also regardless of this data, services It is G.The code implementing service logic even can be shared, because only that linguistic context arranges the data just identifying or distinguishing F and G. Segmentation on this grade can isolate the data of client.Less data base can be by more efficiently process.Even if preparing for after Public room i.e. database server level, the search that F is carried out also will never consider the data of G.With SQL, QL or other data base querying The mixing of code will not return data from more than one data base, and this can reduce a client and obtain other customer datas of access Chance.This is particularly useful in race condition, such as when some assembly of lawyer's shared data bank of plaintiff and defendant but uncommon Hope and their work product is strictly kept apart, or when competitor's use with the addition of service and the service supplier of identical value It is desired to ensure that the data of two clients (competitor) are the safest.While the data of client and other client keep apart, week Phase maintenance function can be completed by the system manager of repeat specification in multiple client's linguistic context.

Middle column object 1212,1222,1232,1242,1252 is supported based on the linguistic context access to multiple data bases, wherein The example of the horizontal segmentation of multiple database purchase same object.CmoDatabaseServerSession object 1222 is each On the server effective data base and exist.The identification of data base's logic by logical name is given CmoDatabaseServerSession object 1222, this logical name can be protected as key attribute dbName of this object Hold.GetAllVersions method supports version management.The method can return version or the lattice of the object in data base Formula version.The code accessing data base or the code authorizing this data base of access should check that version is compatible. Object is connected to data base by CmoClassConfiguration object 1212.CmoClassConfiguration object 1212 Addressable object in representation database.CuDatabaseConfig1232 has the physics number corresponding to logical data base title According to storehouse configuration information.This information may be used for arranging according to linguistic context multiple physical databases are connected to a logical name. CmoDatabaseServerSession object 1222 is connected to basic object by #serverSession relation ServerSession 1223.CmoDatabaseClientSession1242 basic object ClientSession1243 manages Reason client session, considers the linguistic context of this client computer (F or G in this embodiment) simultaneously.

Again accessing the operation of CmoTransaction1251, when getting out submit to affairs, CmoTransaction uses Suitable linguistic context arranges and calls CmoDatabaseTransaction1252.CmoDatabaseTransaction1252 linker UnitOfWork in this object 1253, such as TopLink, to process one or Two-phase commitment of this object.

Two-phase commitment is a kind of transaction protocol submitted in an atomic manner and change in multiple physical data.An enforcement In example, Application Server based on JTS is (any double with J2EE1.3 to support the component software of Two-phase commitment to include The App Server held), in Distributed Transaction support in JDBC driver (such as Opta2000 and Seropto) and data base The Distributed Transaction support of (such as SQL Server and Oracle).COF and COF/EJB uses TopLink to support and based on JTS The task manager (generally being provided by J2EE application server) of (Java Transaction Service) carries out affairs fusion.Two-phase commitment Use is an option.The cost of Two-phase commitment is very big, therefore only uses when needed.Affect multiple object and cross over multiple The user's business of physical database generally uses Two-phase commitment affairs.When EJB object and COF object need in affairs During submission, Two-phase commitment is suitable.This agreement can be with any group of COF object, the object of horizontal segmentation and EJB object Conjunction is used together.

Attention level segmentation is not dependent on COF or another agreement is to be used directly also to be packaged in EJB or other is long-range In method call encapsulation.Intermediate layer encapsulation process horizontal segmentation between self contained data base, and it is independent of database manager. This can be cited as the horizontal segmentation of loose coupling, because self contained data base can even is that incompatible with disparate databases supplier Data base.

Relatively small number of service logic or system code are also required to change, to use horizontal segmentation.Some fundamental rules arrange Table is as follows.

If 1. in configuration file, only one of which data base be currently in use, it means that characteristic The value of " database.projects " is single, then this data base will always be used.

If configuration file 2. exists more than one data base, then understand or analytical data vaguely when performing operation Storehouse information.Clearly analyzing the meaning is to call on CmoClientSession object and/or CmoTransaction object “setDb(CuDatabaseConfig)”.CuDatabaseConfig object generally creates when system start-up.For for whole System obtains the list of availability database object.For certain kinds, " CmoServerSession.getDbObjectsForClas S (Class aCLass) " and " CmoServerSession.getDbObjectsForClass (String aCLassName) " Return the list of " class " resident CuDatabaseConfig object.Fuzzy analysis the meaning be CmoClientSession and/ Or which data base CmoTransaction object can find be processed and without at application code cleverly In call especially " setDb (CuDatabaseConfig) ", as described below.

3. when data message clearly can not be analyzed on CmoClientSession and CmoTransaction object, meeting Words object is attempted with involved all objects to analyze this information.If involved any object has some data bases Information (non-NULL), then this information compares with the database information of correlating sessions object.If the data for session object Storehouse information is empty, then this database information is set to the data message from this object；This information is different else if, then give Go out exception.Involved all objects are all continued by this logic.In order to contribute to identifying for operation and/or the data base of things Information, COF has introduced new interface " CmoDbConflictResolver ".It it is a project configuration CmoDbConflictResolver object.This can be at keyword: database.Conflictresolver.{full Class name of project}={fullclass name that implements CmoDbConflictResolver The configuration of interface} is carried out.

4. calling analyzer in the most possible moment, the meaning is if creating object, then attempt to submit to this object it Before will not call this analyzer.It means that analyzer is it is anticipated that all properties of this object is all to arrange for establishment, and Can be used for them determining which data base this object should belong to.

When finding, by expression or attribute query or attribute map locating, thus analyzer can be based on just Which data base querying the attribute being queried determines for.We never support that integration across database is looked in a single inquiry Ask.Only when also not calling setDb on clientSession and the object that is just being queried has been configured as being present in more than one Individual data base just needs do so.

Can realize the approach of CmoDbConflictResolver be use some configuration informations or other illustrate that some are right As property value is mapped to the dynamic data of specific physical database.This should be the simplest.Such as, the group of this object is used Knit id and determine based on orgId names which data base or which data base, thus this is a single mapping.These data Library name is " logic " title, determines to come for one title of data base and such as its position etc. when configuration/installation Configuration information.Therefore, the title that therefore we use is logical name, and represents the database-name that configuration accesses, and not It it is the actual physics database name in data system.

In client session, available 4 functions are controlled database information.They are: setDb (CuDatabaseConfig)；getDb()；overrideDb(CuDatabaseConfig)；resetDb().GetDb () only returns Return and be arranged on the current database on clientSession object；OverrideDb (CuDatabaseConfig aNewdb) and ResetDb () uses Stack mechanism to follow the tracks of the change of the database information on clientSession.overrideDb Current db is pushed storehouse by (CuDatabaseConfig aNewdb), and current db is set to " aNewdb " having been enter into.As Really storehouse non-NULL, then current db is set to the top element of storehouse by resetDb ()；The most do not do anything.setDb Current db is set to " aNewdb2 " and empties storehouse by (CuDatabaseConfig aNewdb2).Therefore, if when storehouse has Call setDb () when having some information, then storehouse is simply cleared.System client session pair as particular client chance words As each thread basis being used this 4 functions.Therefore the database information on a thread and the data on another thread Storehouse information is unrelated.

OverrideDb (CuDatabaseConfig) and resetDb () function can not be adjusted on CmoTransaction With, although this is the subclass of CmoClientSession.

CmoDbConflictResolver API includes: public CuDatabaseConfigresolveCreate (CmoDbResolverinfo aDbResolverInfo) dish out CeDbNameConflictResolveException； Public CuDatabaseConfigresolveFind (CmoDbResolverinfo aDbResolverInfo) dishes out CeDbNameConflictResolveException.CmoDbResolverinfo API includes: publicCmoClientSession getClientSession()；public Class getMainclass()；public HahMapgetAttValuePairs()；public CmoFindObject getFindObject()；public CmoBasegetNewlyCreatedObject()。

After developing the class implementing CmoDbResolverinfo interface, in CmoDbResolverinfo GetNewlyCreatedObject () may be used for helping to implement resolveCreate (CmoDbResolverinfo)；Equally, GetAttValuePairs () and/or getFindObject () in CmoDbResolverinfo may be used for implementing resolveFind(CmoDbResolverinfo)。

From foregoing description, it will be apparent to those skilled in the art that various system and method can be in terms of the present invention Build with in part.One embodiment is one embodiment of the present of invention, including the side generating application development code Method.The method is it can in addition contain be implemented as system or the device of the method step.This system or device can include some Embodiment, is combined with the step of the method, aspect, option and alternative embodiment.The method is also implemented as being carved with execution should The magnetizing mediums of the program of method step.The generation of exploitation code can be especially useful for the encapsulation business applied environment of multilamellar.The party Method object based on OO application programming, relation and the model of operation.To these objects, relation and operation Modeling can use graphical tool to realize visually.The characteristic distributing to object, relation and/or operation can include representing Whether generate the first characteristic of interface with modeling object.Also include indicating whether generating this locality with assigned operation and/or remote Second characteristic of journey interface.From this model, generate corresponding to this model and the machine-readable data of characteristic thereof.These data can To realize in interior model or output model.This model can be by machine recognition, it is also possible to identified by the mankind.Machine readable Data are for being mapped as data base by model.In one embodiment, data base is relational database.Employing maps and machine can Read data genaration application development code.The application code generated can include object in lasting accesses database Code.Can also include exchanging the interface of the code of object in this lasting accesses database.This is consistent with the first characteristic.Also Can include the interface with assigned operation, this is consistent with the second characteristic.Actually may be used with the interface of described code and assigned operation With component model and remote method invocation (RMI) protocol-compliant with measured server end.Substitute, application development Code can actually with Enterprise JavaBean (EJB) standard 2.0 or update edition compatibility.Continue and access EJB pair The code of elephant can actually with managed by bean continue (BMP) protocol-compliant.Substituting, application development code is permissible The actually DCOM with Microsoft illustrates compatibility.In another aspect of this invention, OO Application Design can be actual Go up and UML (UML) standard is compatible.

One aspect of application and development code method includes generating the method fragment adding custom service logic.In order to realize This aspect of the invention, the code generated when amendment is for the object-oriented model of system with comprise custom service logic Code-insulated comes, and should not be capped or regenerate when revising object-oriented model.

Another aspect of the present invention also includes that multiple 3rd characteristics of object and relation, the 3rd Characteristics Control map step Suddenly.These characteristics are for by object and underlying database that relationship map is such as relational database.These the 3rd characteristics are permissible Include whether to support the segmentation of the configuration to modeling object.Also include whether to record the change histories of the configuration of modeling object.Also Include whether that the one or more fields in Dynamic Array modeling object are with these fields that internationalize.With the present invention relates to dynamically The aspect of array field is associated, and lasting and Access modeling object code can be analyzed and retrieve dynamically based on appointed language Which element of array.This language can be specified by data existing in object being processed are fuzzy, or is understood by language Specify.

Another aspect of the present invention is user can specify which application code of generation, generates machine-readable data, mapping Can continue in the case of the further action not having user with the method step of additional generation.

Another aspect of the present invention is that the database manager that a kind of set is supported issued transaction by least one processes The method of affairs.Replacing, the method can be implemented as performing system or the device of the method step.This system or device are permissible Including some embodiments, it is combined with the step of the method, aspect, option and alternative embodiment.The method is also implemented as carving There is the magnetizing mediums of the program performing the method step.The method can include providing is propped up by the issued transaction of database manager Hold the object oriented framework accessing the method with duration data.It addition, also provide for actually with measured server end Component model and the object oriented framework of remote method invocation (RMI) protocol-compliant.The component model of measured server end with And the example of remote method invocation (RMI) agreement includes Enterprise JavaBean (EJB), Distributed Common Object model (DCOM) And CORBA.The method of set affairs can also include accepting or relevant to affairs for one or more data bases of caching Movable.This acceptance or caching can be carried out by the compatible version of OO framework He this OO framework simultaneously. One aspect of this embodiment is to accept step to include cache object, and when affairs are submitted in instruction to, the method is also wrapped Include and call database manager to process affairs.The aspects includes and accepted and affairs phase by the mechanism of non-database manager The activity closed.This aspect of the invention can use any of the above described standard implementation, including EJB, DCOM and CORBA.

Other embodiments of the invention are that the data management system machine that a kind of set is supported issued transaction by least one processes The method of affairs.As it has been described above, the method is also implemented as method, device or includes that the magnetic implementing the program of the method is situated between Matter.The replacement method of this embodiment is the approximation deformation of above-mentioned collection approach.A kind of deformation includes that data base administration is passed through in offer The issued transaction support access of device and the object oriented framework of the method for duration data.The method also include offer be applicable to Process that EJB standard is compatible and the object oriented framework version called.The method also include simultaneously by object oriented framework and The object oriented framework version compatible to EJB standard accepts activity relevant with affairs, for one or more data bases.? In other two deformation of this embodiment, object oriented framework is applicable to compatible with DCOM or CORBA.Deform at any one In, the thing of acceptance potentially includes cache object and calls database manager to process this affairs when submitting affairs to.

Another embodiment is the method making the data that processed by least one database manager lasting.As it has been described above, The method is also implemented as method, device or includes implementing the magnetizing mediums of the program of the method.The method bag of duration data Include and provide by database manager access and the object oriented framework of the method for duration data.Also include providing by data pipe That reason device accesses the method with duration data and that standard is compatible interface.These interfaces compatible with standard can with EJB, DCOM or CORBA is compatible.The method also includes being accepted for one by object oriented framework and the interface compatible with standard simultaneously Individual or the object accesses of multiple data base and continuation requests.When standard is EJB, object requests can be by OO framework With the interface compatible with EJB standard submits to Java transaction services engine.

The aspect that may be used for any of above embodiment of the present invention is that object oriented framework is applicable to accurate object Last till in data base.The interface compatible with standard, including the interface compatible with EJB standard, it is adaptable to by the object in affairs Last till in more than one data base.

Another embodiment of the present invention is to gather to process the database manager being supported issued transaction by least one The method of things.As it has been described above, the method is also implemented as method, device or includes that the magnetic implementing the program of the method is situated between Matter.The method includes the method providing issued transaction support access and duration data by database manager and implements additional The object oriented framework of the method for function.This additional function can be to be divided by object to test and add production system to Section.This additional function can also is that the change histories following the tracks of object in production system.Or, can be by field in object Carry out Dynamic Array with these fields that internationalize.These additional functions can combine in pairs or all.The method of set affairs Also include additionally providing actually with measured server-side component model and the face of remote method invocation (RMI) protocol-compliant To object-oriented framework version, this version also includes one or more above-mentioned additional function.Individually embodiment includes single additional merit Energy, the combination of paired additional function and whole 3 additional functions.The standard that the present invention of set affairs is compatible can be EJB, DCOM or CORBA.

Another embodiment of the present invention is a kind of to generate data base and the method by the multilamellar service application of horizontal segmentation.As Upper described, the method is also implemented as method, device or includes realizing the magnetizing mediums of program of the method.The method include by Object and relationship modeling, and specify the operation of object-oriented Application Design, wherein this Properties of Objects includes whether that level is divided Cut the object across multiple data bases.The method can apply to object or object group.Object group can be come by a logical name Represent.The method also includes generating the machine-readable data corresponding to model, including characteristic.This machine-readable data can By machine recognition, it is also possible to identified by people, as XML illustrates.The method also includes that model is mapped as this machine of multiple use can Read the data base of data, and from this mapping and machine-readable data, additionally generate application and development code.This application and development generation Code includes the code continuing and accessing the object across multiple data bases.Continue and the code of access object is on database layer The part of interlude layer.Another aspect of the present invention is that the code continuing and accessing object can call multiple independent digit According to storehouse.These self contained data bases can be provided by different database suppliers, although or being carried by a database supplier Supplying can also independent operating.The another aspect of this embodiment can include the data base that multiple cutting object thereon is described, with And one or more field for object or object component are segmented into certain database is described.

Another embodiment of the present invention is a kind of to include at least database layer and many layer services of intermediary service application layer The method carrying out horizontal segmentation object across multiple self contained data bases in application.As it has been described above, the method is also implemented as method, dress Put or include realizing the magnetizing mediums of program of the method.This embodiment is included at least one by explanation in the object of horizontal segmentation One or more fields that may be used for special object is assigned to certain database.The method includes setting up with multiple by level The connection of the data base belonging to object of segmentation, although need not and by all Databases belonging to the object of horizontal segmentation Connect.Before or after establishing the connections, the method include caching one or more need to find, create or need to find or The object created, including by the object of horizontal segmentation.When finding or create, the field of explanation is utilized to analyze this object Affiliated certain database, and call this certain database in database layer, to perform find or create.Similar embodiment It is a kind of method carrying out horizontal segmentation object across multiple self contained data bases, including setting up with at least one by the object of horizontal segmentation The connection of the multiple data bases belonging to Ke Neng.Additionally, arrange or identify the certain database belonging to object of horizontal segmentation.Setting Before or after putting step, cache one or more object needing and finding, create or need to find or create, including by level The object of segmentation.When finding or create, call this certain database in database layer to perform find or create.Quilt Multiple data bases belonging to the object of horizontal segmentation can be marked with a logical name jointly.Use by the one of horizontal segmentation object Individual or multiple attributes carry out the certain database in the multiple data base of logical mappings.These attributes can be this horizontal segmentation object Field.

Although passing through with reference to preferred embodiment and above examples disclose the present invention, it is possible to understand that these examples being to say Bright and unrestricted.Computer aided processing implies in the embodiments described.Therefore, the present invention real can also be currently used for meter The method of calculation machine aid in treatment, include implementing the system of the logic of the method, be carved with the medium of the logic implementing the method, have The data stream implementing the logic of the method or the process service accessed by computer.Those skilled in the art may expect Amendment in the scope of spirit and claims of the present invention and combination.

Claims (4)

1. one kind in the multilamellar service application include at least database layer and intermediary service application layer across multiple self contained data bases The method carrying out horizontal segmentation object, including:

Special object in described object is stated multiple may be used for the multiple horizontal segmentation in this special object right As distributing to the field of multiple data base；

Setting up the connection between described special object and multiple data base, described special object can be based on the field value stated by water Divide equally and cut to the plurality of data base；

Cache one or more object needing to find or create, including described special object；And

When receiving the instruction carrying out finding or create, utilize the field of statement in described special object described specific to resolve Multiple data bases belonging to object, and call the plurality of data base in database layer perform described in find or create.

2. one kind in the multilamellar service application include at least database layer and intermediary service application layer across multiple self contained data bases The method carrying out horizontal segmentation object, including:

Setting up the special object in described object and the connection between multiple data base, this special object can be based on the field of statement It is worth by horizontal segmentation to the plurality of data base；

The plurality of data base belonging to described special object is set；

Before or after this setting steps, cache one or more object needing and finding or create, including described specific right As；And

When receiving the instruction carrying out finding or create, call the plurality of data base in database layer perform to find or Create.

Method the most according to claim 2, wherein, the plurality of data base is marked with a logical name jointly, and these are many Certain database in individual data base is logically mapped out of one or more adeditive attribute.

Method the most according to claim 3, wherein, described adeditive attribute is the field of described special object.