CN102411500B - RFID (Radio Frequency Identification) application-integration component-library integrated system based on OSGi (Open Service Gateway Initiative) layering - Google Patents
RFID (Radio Frequency Identification) application-integration component-library integrated system based on OSGi (Open Service Gateway Initiative) layering Download PDFInfo
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Abstract
The invention belongs to the field of RFID (Radio Frequency Identification) application-integration component-library application integration and particularly relates to an RFID application-integration component-library integrated system based on OSGi (Open Service Gateway Initiative) layering. The RFID application-integration component-library integrated system comprises an OSGi standard service layer in the OSGi layering, a Web presentation layer, a business logic layer and a data lasting layer, wherein the Web presentation layer, the business logic layer and the data lasting layer are sequentially connected in an RFID application system, the Web presentation layer comprises a Web presentation-layer model, a Web presentation-layer view and an MAC (Media Access Controller), the MAC is an MAC based on an SOA (Service-Oriented Architecture), and the reuse for the Web presentation-layer model during application is realized by the MAC based on the SOA through the cooperative working of a model-service provider, a model-service agent and a model-service consumer which are sequentially connected. Through the invention, the RFID application-integration component-library integrated system with light weight, great flexibility, reusability and convenience in integration can be realized.
Description
Technical field
The invention belongs to RFID application integration component base application integration field, particularly a kind of RFID application integration component base integrated approach based on OSGi layering.
Background technology
At present, the integrated application of RFID middleware application mainly launches round RFID middleware and the RIFD application system on it, comprises specifically:
1) RFID middleware and RFID application system are integrated;
2) integrated between isomery RFID application system.
The promotion rate of RFID technology is very rapid in recent years, and its application mode, from the closed loop application in the single industry of being intended for of initial stage or field, has turned to the open loop application of the opening that is intended for multiple industries and field comprehensively.Due to the specification of RFID standardization body, RFID middleware is often realized based on specific standard (as: EPC Global standard), so RFID middleware is fixed the interface of upper layer application system.So how on these fixing interfaces, reasonably build fast the RFID application of various isomery, become the focus of current research.In addition, popular along with RFID open loop application, the integration difficult problem between isomery RFID application system, becomes the factor that hinders RFID widespread use.In addition, because China mainly comes from vast medium and small sized enterprises for the application demand of RFID technology, but for the reason of the aspect such as application cost and application mode, the RFID middleware application integrated solution of main flow lacks affinity to the medium and small sized enterprises of China both at home and abroad, and this has also hindered the popularization of RFID technology in China.In sum, complicated along with RFID applied environment, lightweight, cross-platform, RFID middleware application integrated solution will become and promote the key of RFID technology in China's widespread use flexibly.
RFID application integration component base is the integrated basis of RFID middleware application based on CBSD (Component-based Software Development) flow process, being the set with one group of pre-customized member of height reusability, is a kind of organizational form of member.For a member, from inside, member is to certain programmed logic or the encapsulation of resource, can be the flow process of initiatively carrying out, and can be also the readjustment logic of passive triggering; From outside, member is one provides some interfaces or the unit of service according to certain standard or agreement.But, iff member being regarded as to the unit that has encapsulated logic and resource and interface and service are externally provided, only embody the isolation features of member, in order to realize the multiplexing function of member, the environment that must exist for member, makes suitable design to it.For component base, can be multiplexing in order really to realize its member comprising, there are two difficult points in design:
The first, how reasonably organization component storehouse and member.
The second, how from component base, to select member composition member product.
Consider cross-platform demand, current RFID application system both domestic and external adopts Java language to write mostly, and enterprise-level Java application standard J2EE becomes the specification that most of RFID application systems are all followed.
The target of J2EE platform is to reduce the complicacy of Enterprise Applications exploitation, and traditional J2EE platform is by using various API(as EJB, JTA and JMS etc.), aspect the middleware services standardization of low layer, obtaining larger achievement.But because its main target concentrates in standardized system service, simplify this most basic problem of programming model so ignored, cause producing a large amount of repeated code relevant to metadata, even a very simply application, assembling and the decomposition that also can produce considerable scale data set.
In order to realize the multiplexing function of member, the environment that must exist for member, makes suitable design to it.And RFID application integration member exist with RFID application system among, so, must meet the framework of RFID application system for the design of RFID application integration member.As mentioned before, RFID application system is taked the layer architecture based on J2EE mostly, also RFID application system is divided into Web presentation layer, Data Persistence Layer, Business Logic.The thought original idea of layering in J2EE is time to isolate different logics in exploitation, is the exploitation that developer in order to facilitate different technologies background can be absorbed in its field of being good at.Due to each layer of work eleven of taking charge of in J2EE layer architecture divide clear, so, attempt to design a kind of can be at the member of three layers of concurrent multiplexing unwise.
And because RFID application system is general to distributivity, businesslike requirement, and higher to the requirement of dirigibility and real-time, need to design one lightweight, RFID application system framework more flexibly more.
Summary of the invention
For the shortcoming of prior art, the object of this invention is to provide a kind of lightweight, dirigibility large, can realize reusable and facilitate the integrated RFID application integration component base integrated system based on OSGi layering.The present invention can the RFID of rationalization application integration component base and member, effectively in RFID middleware component base, is selected member composition member product, the real reusability that realizes RFID middleware component base.
For achieving the above object, technical scheme of the present invention is:
A kind of RFID application integration component base integrated approach based on OSGi layering, realized by the RFID application integration component base integrated system based on OSGi layering, the described RFID application integration component base integrated system based on OSGi layering comprises the OSGi standards service layer in OSGi layering, and the Web presentation layer connecting successively in RFID application system, Business Logic, Data Persistence Layer, Web presentation layer, Business Logic, Data Persistence Layer is also connected with OSGi standards service layer respectively, Web presentation layer comprises Web Presentation model, Web presentation layer view and MVC controller, Web presentation layer view is connected with Web Presentation model, MVC controller and Web presentation layer view, Web Presentation model connects,
MVC controller is the architecture service-oriented based on SOA(, service-oriented architecture) the MVC controller of framework, in Web Presentation model, be provided with model service supplier, in MVC controller, be provided with model service consumer, in OSGi standards service layer, be provided with model service succedaneum, multiplexing when the MVC controller based on SOA framework is realized the operation of Web Presentation model by the model service supplier, model service succedaneum, the model service consumer's collaborative work that connect successively.
The present invention is based on OSGi service platform, by adopting the MVC controller based on SOA framework, make the format management Web Presentation model of system with POJO, guarantee Web Presentation model can be realized multiplexing between different Web presentation layer MVC frameworks, also realize the dynamic management to Web Presentation model simultaneously,, amendment newly-increased when occurring, while deleting Web Presentation model, dynamically these variations of perception of system.
As a kind of preferred version, the described MVC controller based on SOA framework is by OSGi Service encapsulation Web Presentation model.MVC controller obtains the state of all Web Presentation model services in the time of operation to OSGi, dynamically upgrade according to the variation of its state the Web layer model set that MVC controller is safeguarded.
As further preferred version, the service of Web Presentation model is Java interface WebComponent.
As another kind of preferred version, the described MVC controller based on SOA framework is realized SOAization based on Struts.Struts is by the MVC framework of increasing income, and is the main flow framework of current J2EE Web presentation layer.
As another kind of preferred version, the described MVC controller based on SOA framework is realized SOAization based on Spring MVC.Spring MVC is a popular Web top layer MVC framework, with the binding distribution of Spring framework, due to the good compatibility of itself and Spring, becomes the Web presentation layer MVC framework that popularity degree is only second to Struts.
As another kind of preferred version, the service logic of Business Logic is used the programming paradigm towards interface.
As further preferred version, the service logic of Business Logic is used and towards the programming paradigm detailed process of interface is:
1) interface of use Java Interface specification Business Logic service logic, the Standard Interface of Business Logic service logic and model service consumer binding;
2) utilize Java Interface described in OSGi Component encapsulating, and derive Java Interface by Export-Package;
3) member that need to realize Business Logic service logic imports the business logic specification Java Interface of Business Logic by Import-Package, and the class that realizes of Business Logic service logic is issued as to OSGi service taking Java Interface as Id.Due to the binding of model service consumer and business logic specification interface, what interface was concrete realize details is hidden, so the change of Business Logic service logic specific implementation does not affect model service consumer.Like this, Business Logic service logic specific implementation is variation in the time of operation neatly just, reaches the effect of multiplexing service logical layer service logic.
As another kind of preferred version, Data Persistence Layer stores all data that need persistence of system, in Data Persistence Layer, the access logic of perdurable data adopts DAO DAO based on SOA framework encapsulation, makes Data Persistence Layer switch data access strategy neatly in the time of operation.
As further preferred version, the described DAO DAO based on SOA framework is encapsulated as IBaseDao service encapsulates.
Compared with prior art, the present invention has following beneficial effect:
RFID application system is divided into three layers of Web label layer, Business Logic and Data Persistence Layers by the present invention, and three layers Each performs its own functions.The present invention is from the organizational form of the angle explanation RFID application integration component base of framework, reusable component from each layer of reusable viewpoint definition RFID application system, make the present invention can reasonably organize RFID application integration component base and member, effectively from selecting member composition member product in RFID middleware component base, really realize lightweight, facilitate the reusability of the RFID middleware component base integrated, dirigibility is large.
Brief description of the drawings
Fig. 1 is RFID middleware application integrated platform Organization Chart;
Fig. 2 is traditional J2EE Organization Chart;
Fig. 3 is the MVC controller bay composition based on SOA framework;
Fig. 4 is the DAO result schematic diagram based on SOA framework.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The present invention as shown in Figure 3 and Figure 4, a kind of RFID application integration component base integrated approach based on OSGi layering, realized by the RFID application integration component base integrated system based on OSGi layering, the described RFID application integration component base integrated system based on OSGi layering comprises the OSGi standards service layer OSGi Service Layer in OSGi layering, and the Web presentation layer, Business Logic, the Data Persistence Layer that in RFID application system, connect successively, Web presentation layer, Business Logic, Data Persistence Layer are also connected with OSGi standards service layer respectively.
Web presentation layer is responsible for a RFID data and information display to operation user, and it comprises:
Web Presentation model: the data of managing application program by applied business rule;
Web presentation layer view: be responsible for the data of display application program, and allow operation user and system to carry out alternately;
MVC controller: be responsible for coordinating Web Presentation model and Web presentation layer view.
Web presentation layer view is connected with Web Presentation model, and MVC controller is connected with Web presentation layer view, Web Presentation model.
In order to realize the multiplexing of Web presentation layer, specifically need to realize following content:
1) MVC controller is the MVC controller based on SOA framework.Based on the present invention is based on OSGi service platform, realize MVC controller with SOA framework, make the system can be with the format management Web Presentation model of POJO, ensure that Web Presentation model can be multiplexing between different Web presentation layer MVC frameworks, and can realize the dynamic management to Web Presentation model,, amendment newly-increased when occurring, while deleting Web Presentation model, system can dynamic sensing.
2) the MVC controller based on SOA framework is by OSGi Service encapsulation Web presentation layer service logic.MVC controller obtains the state of all Web Presentation model services in the time of operation to OSGi, dynamically upgrade according to the variation of its state the Web layer model set that C controller is safeguarded.
3) in Web Presentation model, be provided with model service supplier (Service Provider), in MVC controller, be provided with model service consumer (Service Consumer), in OSGi standards service layer, be provided with model service succedaneum (Service Broker), multiplexing when the MVC controller based on SOA framework is realized the operation of Web Presentation model by the model service supplier, model service succedaneum, the model service consumer's collaborative work that connect successively.
Web Presentation model ISP specific implementation process is as follows:
The service of all Web Presentation models realizes Java interface WebComponent.WebComponent interface is encapsulated by an independent OSGi Bundle, and by the Export-Package of OSGi standard, it is come out in OSGi Bundle runtime environment, WebComponent interface only comprises unique function prototype Object do (ServletRequest, ServletResponse).
Web Presentation model uses OSGi Bundle encapsulation, by the Import-Package of OSGi standard, WebComponent interface is imported to its component range.This Web Presentation model service will realize WebComponent interface, and the model of itself is realized in the do of WebComponent interface method.And in member initial method start method by the service registry of Web Presentation model to OSGi Serivce Layer, and add a Property to this service, the key of this Property is " WebComponentId ", value uses the dynamically class name of this Web Presentation model of acquisition of Java reflex mechanism, as: WebComponentImpl.getClass () .getName (); In the time that structural components service cycle finishes by the service of Web Presentation model from nullifying to OSGi Service Layer; In the time that this Web Presentation model service changes in the time moving, the timestamp about this service in OSGi Service Layer can upgrade in time, to notify Service Consumer.
The implementation procedure of Web Presentation model service consumer:
The HashMap of a WebComponents by name of MVC controller internal maintenance, is initially sky.Newly-built and start an OSGi standard ServiceTracker in the time of the initialization of MVC controller, this ServiceTracker follows the tracks of the state of all WebComponent services, upgrade according to following flow process the model set that ServiceTracker safeguards, and re invocation model:
A) in the time that the call back function addingService of ServiceTracker is called: the value that gets the WebComponentId Propertes of newly-increased Service is key, getting this newly-increased Service is value, this (key, value) tuple is joined in WebComponents set.
B) in the time that the call back function modifiedService of ServiceTracker is called: the value that gets the WebComponentId Propertes of the Service of variation is key, the Service that gets this variation is value, upgrade WebComponents set with this (key, value) tuple.
C), in the time that the call back function removedService of ServiceTracker is called: the value that gets the WebComponentId Propertes of the Service of deletion is key, delete tuple corresponding to this key in WebComponents set.
D), when having while carrying out request from the model of gateway Servlet, search WebComponents set with the class key by name of the model of asking.If find corresponding tuple, call the do method of this tuple value; If can not find corresponding tuple, this MVC controller of dishing out does not find the Exception of corresponding model, the described Exception dishing out should be the primary Exception of MVC controller, can carry out correct processing to the Exception dishing out herein with the exception handling logic that ensures MVC controller.
4) the MVC controller based on SOA framework is realized SOAization based on Struts.
Struts is the MVC framework of increasing income by Apache organization development, is the main flow framework of current J2EE Web presentation layer.Its gateway Servlet is ActionServlet class; MVC controller is RequestProcessor class; The subclass encapsulation of the use Action class of Web Presentation model, Web Presentation model flow process is arranged in execute method.To follow Web presentation layer Integrated Solution of the present invention below Web presentation layer carry out SOAization.
A) newly-increased member variable webComponents, webComponentsTracker and bundleContext.
B) inner classes by RequestProcessor is specified the behavior of webComponentsTracker, dynamically safeguards set webComponents.
C) write initial method init, initialization webComponents, webComponentsTracker, and inject gateway Servlet.
D) rewrite processActionCreate method, make it from WebComponents set, inquire about and create Action.WebComponent, as a privately owned member variable of Action, calls the do method of WebComponent in the execute of Action method.
5) the MVC controller based on SOA framework is realized SOAization based on Spring MVC.
Spring MVC is the popular Web top layer MVC framework of of Spring organization development, with the binding distribution of Spring framework, due to the good compatibility of itself and Spring, becomes the Web presentation layer MVC framework that popularity degree is only second to Struts.Its gateway Servlet is DispatcherServlet class; MVC controller is HandlerMapping class; The use of Web Presentation model has realized the class encapsulation of interface Controller, and Web Presentation model flow process is arranged in handleRequest method.Because the standard of Web presentation layer MVC framework is acted in Spring MVC design completely, above-mentionedly can carry out SOAization to Spring MVC to the thinking of Struts SOAization so use.
In order to realize multiplexing to Business Logic, the service logic of Business Logic is used the programming paradigm towards interface.Detailed process is:
1) interface of use Java Interface specification Business Logic service logic, the Standard Interface of Business Logic service logic and the binding of service logic service consumer;
2) utilize Java Interface described in OSGi Component encapsulating, and derive Java Interface by Export-Package;
3) member that need to realize Business Logic service logic imports the business logic specification Java Interface of Business Logic by Import-Package, and the class that realizes of Business Logic service logic is issued as to OSGi service taking Java Interface as Id.
Need to use the member of Business Logic service logic to inject the service of Business Logic service logic by OSGi standards service layer, now, use the code of Business Logic service logic only need to bind with Business Logic business logic specification Java Interface, concrete which Business Logic service logic of injecting realizes, and is determined according to service parameter by OSGi standards service layer.Due to the binding of model service consumer and Business Logic business logic specification interface, what interface was concrete realize details is hidden, so the change of Business Logic service logic specific implementation does not affect model service consumer.Like this, Business Logic service logic specific implementation is variation in the time of operation neatly just, reaches the effect of multiplexing service logic.
Data Persistence Layer stores all data that need persistence of system, and in order to realize Data Persistence Layer, in Data Persistence Layer, the access logic of perdurable data adopts the DAO DAO encapsulation based on SOA framework.The described DAO DAO based on SOA framework is encapsulated as IBaseDao service encapsulates.Its idiographic flow is:
1) first, with an IBaseDao interface of form encapsulation of OSGi Bundle, and use the Export-Package of OSGi standard that IBaseDao interface is come out in OSGi Bundle runtime environment.
2) specific implementation of each data storage scheme and access strategy (as: HibeernateDao, JDBCDao, iBatisDao etc.) is used an OSGi Bundle to encapsulate separately, IBaseDao interface is imported to its component range by Import-Package by OSGi standard, and realize IBaseDao interface.
3) in the specific implementation Bundle of each data storage scheme and access strategy taking IBaseDao as service Id, realization by it for IBaseDao interface is issued as OSGi standards service, and add a Property to this service, the key of this Property is " DaoImplId ", value uses the dynamically class name of this Dao specific implementation of acquisition of Java reflex mechanism, as: HibeernateDao.Impl.getClass () .getName ().
The service logic Bundle that need to inject Dao object at each, initialization also starts a ServiceTracker who follows the tracks of IBaseDao service, the dynamically variation of perception IBaseDao service.
Claims (3)
1. the RFID application integration component base integrated approach based on OSGi layering, realized by the RFID application integration component base integrated system based on OSGi layering, the described RFID application integration component base integrated system based on OSGi layering comprises the OSGi standards service layer in OSGi layering, and the Web presentation layer connecting successively in RFID application system, Business Logic, Data Persistence Layer, Web presentation layer, Business Logic, Data Persistence Layer is also connected with OSGi standards service layer respectively, Web presentation layer comprises Web Presentation model, Web presentation layer view and MVC controller, Web presentation layer view is connected with Web Presentation model, MVC controller and Web presentation layer view, Web Presentation model connects,
It is characterized in that, in order to realize the multiplexing of Web presentation layer, the realization of the described RFID application integration component base integrated approach based on OSGi layering specifically comprises following setting
1) MVC controller is the MVC controller based on SOA framework; 2) the MVC controller based on SOA framework is by OSGi Service encapsulation Web presentation layer service logic; 3) in Web Presentation model, be provided with model service supplier Service Provider, in MVC controller, be provided with model service consumer Service Consumer, in OSGi standards service layer, be provided with model service succedaneum Service Broker, multiplexing when the MVC controller based on SOA framework is realized the operation of Web Presentation model by model service supplier Service Provider, the model service succedaneum Service Broker, the model service consumer Service Consumer collaborative work that connect successively; 4) the MVC controller based on SOA framework is realized SOAization based on Struts, or the MVC controller based on SOA framework is realized SOAization based on Spring MVC;
In order to realize multiplexing to Business Logic, the service logic of Business Logic is used the programming specification towards interface; Data Persistence Layer stores all data that need persistence of system, and in order to realize Data Persistence Layer, in Data Persistence Layer, the access logic of perdurable data adopts the DAO DAO encapsulation based on SOA framework;
The service logic of described Business Logic is used:
1) interface of use Java Interface specification Business Logic service logic, the Standard Interface of Business Logic service logic and model service consumer Service Consumer binding;
2) utilize Java Interface described in OSGi Component encapsulating, and derive Java Interface by Export-Package;
3) member that need to realize Business Logic service logic imports the business logic specification Java Interface of Business Logic by Import-Package, and the class that realizes of Business Logic service logic is issued as to OSGi service taking Java Interface as ID.
2. the RFID application integration component base integrated approach based on OSGi layering according to claim 1, is characterized in that, the service of Web Presentation model is Java interface WebComponent.
3. the RFID application integration component base integrated approach based on OSGi layering according to claim 1, is characterized in that, the described DAO DAO based on SOA framework is encapsulated as IBaseDao service encapsulates.
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