CN107133055A - A kind of method that customized development is realized based on ClassLoader - Google Patents

A kind of method that customized development is realized based on ClassLoader Download PDF

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Publication number
CN107133055A
CN107133055A CN201710422025.4A CN201710422025A CN107133055A CN 107133055 A CN107133055 A CN 107133055A CN 201710422025 A CN201710422025 A CN 201710422025A CN 107133055 A CN107133055 A CN 107133055A
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class
customization
project
war
new
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CN107133055B (en
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陶富成
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Zhuo Zhuo Network Technology Co., Ltd.
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Focus Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00Arrangements for software engineering
    • G06F8/20Software design
    • G06F8/24Object-oriented
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00Arrangements for software engineering
    • G06F8/30Creation or generation of source code
    • G06F8/31Programming languages or programming paradigms
    • G06F8/315Object-oriented languages
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00Arrangements for software engineering
    • G06F8/30Creation or generation of source code
    • G06F8/38Creation or generation of source code for implementing user interfaces
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00Arrangements for software engineering
    • G06F8/60Software deployment
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00Arrangements for program control, e.g. control units
    • G06F9/06Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44Arrangements for executing specific programs
    • G06F9/445Program loading or initiating
    • G06F9/44521Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading

Abstract

A kind of method that customized development is realized based on ClassLoader, the customization of the project of product design and realization based on J2EE frameworks on e-commerce platform:1) project of J2EE frameworks is newly created on e-commerce platform according to individual demand;2) grassroot project in establishment 1);3) project of new J2EE frameworks is packaged into war bags, and the war bags is published on application server, while the entitled plg of the suffix for changing the war bags or other tasks;When application starts the class in loading business war bags, the static resource in customization war bags is loaded first using the ClassLoader loaders of preprogrammed.

Description

A kind of method that customized development is realized based on ClassLoader
Technical field
The invention belongs to the technical field of java exploitations, and in particular to one kind realizes customized development based on ClassLoader Method.
Background technology
ClassLoader is the Classloader into virtual machine for dynamic load class files, when one When classloader loads a Class, all Class that this Class is relied on and reference are also by this Classloader is responsible for loading.The process of ClassLoader loading classes includes:(1) .class files are found and this file It is loaded into internal memory;(2) bytecode is verified, Class class data structure analysis, the link of Memory Allocation and symbol table;(3) in class The execution of static attribute and initialization assignment and static code block.
Product programming, design and realization on most of e-commerce platform is primarily to meet the general of most enterprises Demand, do not handle difference of each enterprise in detail in some business operations or flow, in order to meet such situation, It is accomplished by being customized business according to the requirement of client, but based on the customization of a J2EE project, is related to table, the page, stream The change of journey and service logic, its more current way is cutting Zhi Kaifa and safeguarded.But it is such have the disadvantage it is particularly evident:
(1) release maintenance is very complicated.One customization customer is accomplished by a version, and client is more, and version amount is bigger!
(2) exploitation maintenance can be very huge.Such as:During the general character code maintenances such as product what's new, reparation bug, these points The maintenance cost of branch version is multiplied very much!
(3) test and issue are complicated.Corresponding branch code, packing, test etc. one is obtained for different clients whole Set process, operating efficiency is low and easily malfunctions.
The customization demand proposed for the user of the different segmented industries, the method being usually taken at present has two kinds, its One is branch's exploitation, the second is plug-in unit pattern;Branch's exploitation, refers to specially open up one point for different enterprise customers Branch, and carry out in this branch customized development;But as number of the enterprise increases, branch gradually increases, will undoubtedly the later stage be given Maintenance, upgrading etc. bring extremely huge expense cost;The developing plug, main include explains language based on the dynamic such as script Make peace and be extended based on particular plug-in interface, the former mainly dynamically explains the ability performed using script, due to script Language need not be compiled, thus without structural type in advance, only need to dynamically explain execution when calling every time, be come for exploitation exhibition Say that adjustment programme logic is more convenient, but executing efficiency is poor, closely suitable for the uncomplicated scene of extension demand;The latter's branch More complicated service logic is held, some components that have followed some ad hoc rules are usually write, main program is starting or performed The type in the component is loaded by modes such as static call or reflections during specific transactions logic and respective code is performed, by exposure Address of the expansion interface in internal memory be transmitted to component, component then calls card i/f according to these addresses, so as to realize pair The enhancing of main program function.Developing plug is to use a kind of more mode at present, but is limited to connect in original service What's new on the basis of mouth and card i/f, it is impossible to change original function, additional product can only be considered as.
Frequently changed to solve the program made because meeting the business demand constantly updated, patent " is based on pre-add carrier aircraft The plug-in unit of system supports method " (application number:201510136737.0) there is new breakthrough, comprise the following steps:1st, main program is opened Move and load plug-in component operation framework, be responsible for reading external plug-in by plug-in component operation framework;2nd, plug-in component operation framework is external plug-in Start the type in independent Classloader, Classloader loading plug-in unit, and type is saved in global buffer;3rd, plug-in component operation Framework obtains the current Classloader of main program, and father's loader of the loader of the current class of main program is replaced with into former father's loader Proxy class, the proxy class of former father's loader can intercept all types loadings for issuing original Classloader and call;4th, when main journey During sequence request call Class types, Cla ss types are first searched from former father's loader according to typonym, if not finding mesh Type is marked, then the type for whether having corresponding plug-in unit to provide is matched from global buffer, if the match is successful, is loaded directly into holding OK, conversely, then throw exception;However, the patent is only through the mechanism of compensation type, meet new in the way of continuous what's new Demand, although customization exploitation can be tackled, but the stability that compatibility and program are replaced all does not consider.J2EE is one The new JAVA Technical Architectures of set, comprising many components, can mainly simplify and specification application system exploitation and deployment, and then improve Portable, safety is worth with using again.J2EE cores are one group of technical specification and guide, various components, clothes included in it It is engaged in framework and the hierarchy of skill, there is common standard and specification, allows between the various different platforms for following J2EE frameworks, exist good Good compatibility.
The content of the invention
To solve the limitation that prior art is present, the purpose of the present invention is, in general-purpose system or the premise of page presence Under, single exploration project is set for the individual demand of each user, and load using ClassLoader customization one by one Customization class in project, by way of bottom code is changed automatically, is covered to original page or original systemic-function Formula is replaced, and using J2EE frameworks, realizes the customized development of minimum cost.
The technical scheme is that:A kind of method that customized development is realized based on ClassLoader, e-commerce platform On product design and realize the customization of the project based on J2EE frameworks, specific steps include:
Step 1:The project of J2EE frameworks is newly created on e-commerce platform according to individual demand:In general-purpose system or page On the premise of face is present, for each individual demand, the project of new independent J2EE frameworks is set up respectively;New J2EE framves The project of structure needs to develop the project dependent on the former J2EE frameworks for having customized development demand;
Service logic according to customization builds customization class, and customization class is placed in the project of new J2EE frameworks, and root Choose whether to inherit original class according to business demand, while indicating customization class;Especially, the project of new J2EE frameworks Exploitation dependence refer to the development phase rely on, other stages all independent of;Wherein, the exploitation is relied on, and is the one of maven projects Kind of dependent status, refers to rely in the development phase, other stages all independent of behavior, that is, do not have this after packing The content of dependence.
Step 2:Grassroot project in establishment step 1:For there is the static money of customized demand in the project of new J2EE frameworks Source, is related to the static resource related to web projects including the page, picture, webpage pattern css, webpage design js, quiet State resource is described by static file, and the path of static file and title should be kept and original J2EE frameworks in the project of new J2EE frameworks Project in static file path it is consistent with title;
In the static file, the business tine for realizing customization is designated;
Step 3:The project of new J2EE frameworks is packaged into war bags, and the war bags are published on application server, together The entitled plg of suffix or other any one file suffixes of the Shi Biangeng war bags, to distinguish new new projects war bags and former project War bags, and new projects' war bags are placed in business war APMB packages folder;
The business packet file is the realization bag for depositing whole business functions that some application system is covered;
Step 4:Start customized monitor listener, after application server starts, for being stored in step 3 Customization war bags in application server scan all be labeled as " customized identifications " in customization war bags by monitor listener Class is customized, while the matching relationship in internal memory between the record customization class class corresponding in original system with it;
Step 5:It is first using the ClassLoader loaders of preprogrammed when application starts the class in loading business war bags Static resource in first loading customization war bags;If the static resource not matched in customization war bags with business function, plus Carry the static resource in former project war bags;
Step 6:In the class during ClassLoader loads business war bags, according to the customization class set up in step 4 and original Corresponding relation between class, when the former class of loading is in the presence of the relation that is customized, has then loaded and has continued to load determining for matching after former class Class processed, and the result of customization class is returned, realize the customizing functions substituted based on bottom code;
Beneficial effect of the present invention:(1) present invention replaces program generation by using ClassLoader load mechanisms from bottom Function and operation flow that the mode of code is changed, increased, even deleting in former general-purpose system, and be changed to meet individual requirements Systemic-function, reduce customized development Project Process in redundant code, be effectively reduced exploitation amount and maintenance;(2) originally Invention sets single exploration project by the individual demand for each user, and it is exactly one miniature to make each customized user Project, code administration mode just as plug-in unit, easily in product normally plan with upgrade etc. operation, realize it is more flexible Development scheme.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet that customized development is realized based on ClassLoader in the embodiment of the present invention.
Specific embodiment
For the technical scheme that those skilled in the art can be better understood from present application example, below in conjunction with the accompanying drawings Technical scheme in implementing to the application is described further.
Fig. 1 is a kind of schematic flow sheet that customized development is realized based on ClassLoader in the embodiment of the present invention, specific stream Journey includes:
Step 101:Existed based on existing general-purpose system or the page, according to the individual demand of each user, customization The independent J2EE projects of exploitation, and customization class is built according to the service logic of customization, and customization class is placed on new J2EE projects In, and chosen whether according to business demand to inherit original class, while to customization class " to explain@AepsCustomize " to mark Know;
Step 102:For there is the static resource of customized demand in newly-built J2EE projects in step 1, be related to including the page, The static resource related to web projects including picture, webpage pattern css, webpage design js, static resource is retouched by static file State, the path of static file and title should keep consistent with the path of static file and title in former project in new J2EE projects;
Step 103:New J2EE projects are packaged into war bags, and the war bags are published on application server, same to time-varying The entitled plg of suffix or other any one file suffixes of the more war bags, to distinguish new new projects war bags and former project war Bag, and new projects' war bags are placed in the file where business war bags;
Step 104:Work out and start monitor listener, after application server starts, for being stored in step 3 Customization war bags in application server are all in monitor listener scanning customization war bags to be labeled as " note@ AepsCustomize " customization class, while in internal memory between the record customization class class corresponding in original system with it With relation;
Step 105:When application starts the class in loading business war bags, the ClassLoader loaders of preprogrammed are utilized Static resource first in loading customization war bags;If the static resource not matched in customization war bags with business function, Perform step 106:Static resource in the former project war bags of loading;
Step 107:In the class during ClassLoader loads industry war bags, according to the customization class set up in step 4 and original Corresponding relation between class, when the former class of loading is in the presence of the relation that is customized, has then loaded and has continued to load determining for matching after former class Class processed, and the result of customization class is returned, realize the customizing functions substituted based on bottom code.
Embodiments of the invention are the foregoing is only, are not intended to limit the invention, it is all in the spirit and principles in the present invention Within any modifications, equivalent substitutions and improvements for being made etc., with protection scope of the present invention.

Claims (1)

1. a kind of method that customized development is realized based on ClassLoader, it is characterized in that the product on e-commerce platform is set Meter and the customization for realizing the project based on J2EE frameworks, specific steps include:
Step 1:The project of J2EE frameworks is newly created on e-commerce platform according to individual demand:Deposited in general-purpose system or the page On the premise of, for each individual demand, the project of new independent J2EE frameworks is set up respectively;New J2EE frameworks Project needs to develop the project dependent on the former J2EE frameworks for having customized development demand;
Service logic according to customization builds customization class, and customization class is placed in the project of new J2EE frameworks, and according to industry Business demand chooses whether to inherit original class, while being indicated to customization class;
Especially, the project of new J2EE frameworks exploitation rely on refers to the development phase rely on, other stages all independent of;Its In, it is described exploitation rely on, be a kind of dependent status of maven projects, refer to the development phase rely on, other stages all independent of Behavior, that is, packing after do not have this dependence content.
Step 2:Grassroot project in establishment step 1:For there is the static resource of customized demand in the project of new J2EE frameworks, relate to And to the static resource related to web projects including the page, picture, webpage pattern css, webpage design js, static money Source is described by static file, and the path of static file and title should keep the item with original J2EE frameworks in the project of new J2EE frameworks The path of static file is consistent with title in mesh;
In the static file, the business tine for realizing customization is designated;
Step 3:The project of new J2EE frameworks is packaged into war bags, and the war bags are published on application server, same to time-varying The entitled plg of suffix or other any one file suffixes of the more war bags, to distinguish new new projects war bags and former project war Bag, and new projects' war bags are placed in business war APMB packages folder;
The business packet file is the realization bag for depositing whole business functions that some application system is covered;
Step 4:Start customized monitor listener, after application server starts, for being stored in application in step 3 Customization war bags all customizations for being labeled as " customized identification " in monitor listener scanning customization war bags in server Class, while the matching relationship in internal memory between the record customization class class corresponding in original system with it;
Step 5:When application starts the class in loading business war bags, added first using the ClassLoader loaders of preprogrammed Carry the static resource in customization war bags;If the static resource not matched in customization war bags with business function, loading is former Static resource in project war bags;
Step 6:In the class during ClassLoader loads business war bags, according between the customization class set up in step 4 and former class Corresponding relation, when the former class of loading is in the presence of the relation that is customized, has then loaded and continued the customization class for loading matching after former class, And the result of customization class is returned, realize the customizing functions substituted based on bottom code.
CN201710422025.4A 2017-06-07 2017-06-07 Method for realizing customized development based on ClassLoader Active CN107133055B (en)

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CN108804102A (en) * 2018-05-24 2018-11-13 武汉斗鱼网络科技有限公司 Extended method and system, the server and storage medium of direct broadcasting room styles
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CN109088911A (en) * 2018-06-26 2018-12-25 四川驹马科技有限公司 A kind of customization distribution method and its system based on SaaS service
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CN109799982A (en) * 2018-12-28 2019-05-24 深圳竹云科技有限公司 A kind of implementation development approach based on WAR packet

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