CN102291464B - System and Method for Dynamically Generating Web Service from Business Process in BPM - Google Patents

Abstract

The invention relates to a system for dynamically generating Web Service by business flow in an enterprise BPM (Business Process Management) system. The system comprises a business flow service interface defining module, a dynamic Web Service member assembling module, a Web Service dynamic generating module, a disaster recovering module, a dynamic service management module, a security control module and a business flow service version control module. The invention also relates to a method for dynamically generating Web Service by business flow of the system. By using the system and method provided by the invention, the business flow has natural integration characteristic; the Web Service is published while the process is scheduled; unique service interface standard is obtained and the encoding is not needed. Meanwhile, portability and expandability of the system are enhanced; the system and method provided by the invention can rapidly adapt to business requirement variation and technical variation and have the advantages of simple development period, explicit interface, convenience in configuration, higher efficiency in operation period, stable and reliable system performance and wider application range; and the establishment of a highly modular and highly integrated software system can be supported.

Description

System and Method for Dynamically Generating Web Service from Business Process in BPM

technical field

The present invention relates to the field of computer applications, in particular to the field of computer application technology related to the architecture of business process management (BPM), and specifically refers to a system and method for dynamically generating Web Services from business processes in an enterprise BPM system.

Background technique

In the field of enterprise-level application development, with the continuous expansion of the application scale, the integration and interaction between various systems become more and more frequent. To realize a specific function, it is necessary to communicate with multiple systems. collaboration to complete. At present, the architecture of mainstream software projects is similar to a "silo", in which there are databases, middle layers, and client presentation layers. The data of each application system belongs to different silos. When our informatization develops to a certain extent and the systems that have been developed and put into operation need to be integrated or share data, we have to pass through the "holes" in the "silos". " to access the data. Once a data object changes, the impact on other systems will become "unknowable" and "uncontrollable".

Business process management (Business Process Management, BPM) software system is an effective means to solve the disadvantages of the existing software system structure. Business processes are defined by combing and orchestrating business activities. The BPM software system has changed from function- and data-centered to business-process-centered, driving business development through the operation of business processes, integrating business interactions between different business departments through business processes, and improving the entire enterprise. efficiency.

Business process is at the core of BPM software system. Traditional BPM implementation methods include business process modeling, business process analysis, business process design, business process execution, business process monitoring, business process optimization and other steps. However, with the development of enterprise scale and the transformation of its own business model, the BPM system is required to be able to quickly respond to business changes, and the BPM system is required to have integration capabilities and agile change capabilities. Specifically, it expands from two dimensions. The first is that the business process requires integration with other business systems in the form of Web Service, such as being able to integrate with SAP’s inventory management system and IBM Lotus system; the second is the dynamic optimization and adjustment of business processes Ability, business processes of enterprises will always face changes, such as the sensitivity of the financial industry to indicators such as interest rates and deposit reserves, business analysts require business process adjustments in the shortest possible time to meet business changes.

For the first case, the usual method is to carry out secondary development of the BPM system, encapsulate the business process in the BPM system, introduce third-party Web Service components, for example, embed an open source framework such as Axis2, and encapsulate the business process Operation interface, customize a set of interface objects, and publish it as Web Service with the help of Axis2. However, due to differences in integration standards and even differences in the integration modes of different business systems, service inconsistencies may occur after the implementation of different BPM systems, such as inconsistency in service interface data, inconsistency in access security control, etc., resulting in service unavailability.

For the second case, BPM has experienced Workflow, Human Task, Business Form, etc. in the development process. By defining some indicators that need to be adjusted as manual tasks in the business process analysis stage, the operation of the business process is controlled by means of manpower; There is also a way to embed a dynamic script language in the business process template, and use the ability of the program to execute the script language to improve process flexibility. However, each method has limitations. For example, using human resources has very high requirements for personnel, and it is very complicated during the operation of the business system. It often faces error rollbacks, reassignments, etc., which increases the complexity of the system. The way of adopting dynamic scripting language cannot be understood by business personnel, and it is also difficult for software developers to debug and so on. From the perspective of software components, this solution has a very high degree of coupling to the program code of the business process.

With the continuous expansion of the system, there are more and more business processes in the BPM system, and there are more and more integrations between business processes. If you choose a solution that requires very high personnel and highly coupled software modules, it will be a disaster for both business analysts and software development testers. Today, as BPM increasingly needs service integration, how to realize the dynamic generation of Web Service by business process in BPM system has become very urgent.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art, to provide a system that can automatically generate a Web Service according to the service interface definition after the business process is arranged in the BPM system, and has disaster recovery, security control, simple and clear, no need Coding and service interfaces are consistent, the system performance is stable and reliable, and the system and method for realizing the dynamic generation of Web Service by business processes are widely applicable.

In order to achieve the above-mentioned purpose, in the enterprise BPM system of the present invention, the system for realizing the dynamic generation of Web Service by business process includes:

The business process service interface definition module is used to define the Web Service interface information of the business process;

The dynamic Web Service component assembly module is connected with the business process service interface definition module to assemble components according to the Web Service interface information of the business process;

The Web Service dynamic generation module is connected with the dynamic Web Service component assembly module to load the components, generate Web Service services, and provide Web Service service access processing;

The dynamic service management module is connected with the dynamic generation module of Web Service to manage the Web Service;

The disaster recovery module, and the dynamic Web Service component assembly module, are used to automatically generate Web Service according to the business process in the system when the system is restarted;

Security control module, is connected with described Web Service dynamic generation module, in order to Web Service service provides safety guarantee;

The business process service version control module is respectively connected with the dynamic Web Service component assembly module and the Web Service dynamic generation module to provide multi-version dynamic services to the multi-version business process services existing in the system.

In this enterprise BPM system, in the system that realizes the dynamic generation of Web Service by business process, the described business process service interface definition module includes:

The service interface metadata model resolver is used to analyze the data types supported by the BPM system;

The business process service interface definition configurator is connected with the service interface metadata model parser to define the service name and service parameters of the business process definition service interface in XML language;

The service interface definition analyzer is connected with the business process service interface definition configurator, and connected with the dynamic Web Service component assembly module, so as to convert the service interface definition into a service object.

In the enterprise BPM system that realizes the dynamic generation of Web Services by business processes, the data type is one or more of basic types, complex types, and XSD types.

In the enterprise BPM system that realizes the dynamic generation of Web Service by business processes, the dynamic WebService component assembly module includes:

A service interface generator, connected to the service interface definition analyzer, generates a service virtual java interface according to the service interface definition;

The service component generator is connected to the service interface generator, and creates a service component package containing services and data type resources according to the service interface definition;

The service component scheduler connects the service component generator and the Web Service dynamic generation module, and schedules the deployment, release and destruction of the service component according to the service interface definition.

In this enterprise BPM system, in the system that realizes the dynamic generation of Web Service by business process, the dynamic generation module of Web Service includes:

A service component loader, connected to the service component scheduler, to load the service component package;

Web Service service generator, connects described service component loader, generates Web Service service by described virtual java interface;

Web Service service access device, connected to the Web Service service generator, and connected to the dynamic service management module, disaster recovery module, security control module and business process service version control module, in order to provide Web Service calling transaction business processing.

The present invention also provides a method of utilizing the system to realize the dynamic generation of Web Service by business processes in the enterprise BPM system, the method comprising the following steps:

(1) The business process service interface definition module performs business process orchestration process definition service interface information operations;

(2) The described dynamic Web Service component assembly module and the described business process service version control module perform business process hot deployment to dynamically generate Web Service operations;

(3) The disaster recovery module performs a system failure recovery operation;

(4) The security control module performs the security interception operation of the business process service;

(5) described Web Service dynamic generation module carries out business process service access operation;

(6) The dynamic service management module performs dynamic service management operations.

In the method for realizing business process dynamic generation Web Service in this enterprise BPM system, described business process service interface definition module comprises: service interface metadata model resolver, the business process connected with described service interface metadata model resolver The service interface definition configurator and the service interface definition analyzer connected with the business process service interface definition configurator, the business process service interface definition module performs business process orchestration process definition service interface information operations, specifically including the following steps:

(11) The data types supported by the loading system of the service interface metadata model parser, the data types include simple data types and complex data types;

(12) The business process service interface definition configurator orchestrates the process and configures the service interface;

(13) The service interface definition analyzer parses the service definition in the business process into service objects.

In the method for realizing the dynamic generation of Web Service by business processes in the enterprise BPM system, the complex data type is one or more of Java Bean, List, Set and Map types.

In the method for realizing business process dynamic generation Web Service in this enterprise BPM system, described service interface definition is to comprise the XML fragment of interface definition structure description XSD Schema, and service interface definition comprises service interface name and service interface parameter list, and described The service interface parameter list includes incoming parameters and return values.

In the method for realizing the dynamic generation of Web Service by business process in the enterprise BPM system, the service interface definition analyzer in the business process is parsed into a service object by the service interface definition analyzer, which specifically includes the following steps:

(131) The service interface definition analyzer is injected into the service interface metadata model parser in the BPM engine startup process;

(132) During the web interface deployment process, the service interface metadata model parser invokes the service interface definition parser to parse the service interface definition XML fragment into a Java Bean object containing a service name and a service parameter list, and caches the Java Bean object.

In the method for dynamically generating Web Service by business processes in the enterprise BPM system, the dynamic WebService component assembly module includes: a service interface generator, a service component generator connected to the service interface generator, and a service component generator connected to the service interface The service component scheduler of the component generator, the described dynamic Web Service component assembly module and the business process service version control module perform business process hot deployment and dynamically generate Web Service operations, specifically including the following steps:

(21) The service interface generator is triggered according to the dynamic deployment of the business process to convert the service object into a virtual Java interface;

(22) The service component generator loads the virtual Java interface corresponding to the service, the data type definition XSD Schema information, and creates the service component file according to the template;

(23) The service component scheduler schedules the service components, and the scheduling includes service component deployment, release and destruction;

(24) The business process service version control module switches the version of the service component, and uses the service component of the released version as a default service.

In the method for dynamically generating Web Services by business processes in the enterprise BPM system, the service components include service assembly files, dependent resource XSD files and complex data type Acegis files.

In the method for dynamically generating Web Service by business processes in the enterprise BPM system, the service component generator loads the corresponding virtual Java interface and data type definition XSD Schema information of the service and creates the service component file according to the template, specifically including the following step:

(221) The service component generator invokes the virtual Java interface created by the service interface generator as the service interface;

(222) The described service component generator judges whether to rely on the relevant XSD file according to the reflection data type of the service interface, if so, then enter step (223), if not, then enter step (224);

(223) The service component generator loads the XSD file from the BPM system and puts it into the service component, and enters step (224);

(224) The service component generator judges whether to include List, Set or Map complex data types according to the reflection data type of the service interface, if so, then enter step (225), if not, then enter step (226);

(225) service component generator creates and describes the Aegis file of complex type and puts into service component, and enters step (226);

(226) The service component generator uses the template resource to create the service component.

In the method for realizing business process dynamic generation Web Service in this enterprise BPM system, described disaster recovery module carries out system fault recovery operation, specifically comprises the following steps:

(31) The disaster recovery module described in the disaster recovery module checks the service component status as a starting Listener when the system encounters a disaster failure and needs to restart, and determines whether to start recovery;

(32) After the disaster recovery module determines to start the recovery, it calls the dynamic Web Service component assembly module to regenerate the faulty service in the system.

In the method for realizing the dynamic generation of Web Service by the business process in the enterprise BPM system, the security control module performs the security interception operation of the business process service, specifically:

The security control module intercepts the service request according to the user name and password configured by the system, and prohibits unauthorized users from invoking it.

In the method for realizing business process dynamic generation Web Service in this enterprise BPM system, described Web Service dynamic generation module carries out business process service access operation, specifically:

The described Web Service dynamic generation module intercepts the service request according to the user name and password configured by the system, and prohibits unauthorized users from invoking.

In the method for realizing business process dynamic generation Web Service in this enterprise BPM system, described dynamic service management module carries out dynamic service management operation, specifically:

The dynamic service management module manages all service components in the system.

In the method for dynamically generating Web Services by business processes in the enterprise BPM system, the management includes querying service WSDL and statistical service data.

Adopt the enterprise BPM system of this invention to realize the system that business process dynamically generates Web Service, it comprises business process service interface definition module, the dynamic Web Service component assembly module that connects this business process service interface definition module, connects this dynamic Web Service component The Web Service dynamic generation module and the disaster recovery module of the assembly module, the dynamic service management module and the security control module connected to the Web Service dynamic generation module, and the components connected with the dynamic Web Service component assembly module and the Web Service dynamic generation module respectively Business process service versioning module. The method of dynamically generating Web Service by using the business process of the system has natural integration characteristics, and the Web Service is released while the process is arranged, and the service interface standard is unified without coding. At the same time, it enhances the portability and scalability of the system, can quickly adapt to changes in business needs and technology changes, and can support the establishment of a highly modular and highly integrated software system. The development period is simple, the interface is clear, the configuration is convenient, and the operation period is efficient. It is relatively high, the system performance is stable and reliable, and the scope of application is relatively wide, which has laid a solid foundation for the integrated development of the BPM system.

Description of drawings

Fig. 1 is a schematic structural diagram of a system that realizes business process dynamic generation of Web Service in the enterprise BPM system of the present invention.

Fig. 2 is the class diagram of the service dynamic generation module in the system that realizes business process dynamic generation Web Service in the enterprise BPM system of the present invention.

Fig. 3 is the class diagram of the service component generator in the system that realizes business process to dynamically generate Web Service in the enterprise BPM system of the present invention.

Fig. 4 is the class diagram of the service access module in the system that realizes business process dynamic generation Web Service in the enterprise BPM system of the present invention.

Fig. 5 is the class diagram of the disaster recovery module in the system that realizes business process to dynamically generate Web Service in the enterprise BPM system of the present invention.

FIG. 6 is a sequence diagram of a method for dynamically generating a Web Service from a business process in the enterprise BPM system of the present invention.

FIG. 7 is a sequence diagram of dynamically generating Web Service calls by business processes in an enterprise BPM system using the method of the present invention.

Detailed ways

In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

Please refer to FIG. 1 , which is a schematic structural diagram of a system for realizing business process dynamic generation of Web Service in the enterprise BPM system of the present invention.

In one embodiment, the system for realizing the dynamic generation of Web Service by business processes in the enterprise BPM system includes:

The business process service interface definition module is used to define the Web Service interface information of the business process;

The dynamic Web Service component assembly module is connected with the business process service interface definition module to assemble components according to the Web Service interface information of the business process;

The Web Service dynamic generation module is connected with the dynamic Web Service component assembly module to load the components, generate Web Service services, and provide Web Service service access processing;

The dynamic service management module is connected with the dynamic generation module of Web Service to manage the Web Service;

The disaster recovery module, and the dynamic Web Service component assembly module, are used to automatically generate Web Service according to the business process in the system when the system is restarted;

Security control module, is connected with described Web Service dynamic generation module, in order to Web Service service provides safety guarantee;

The business process service version control module is respectively connected with the dynamic Web Service component assembly module and the Web Service dynamic generation module to provide multi-version dynamic services to the multi-version business process services existing in the system.

The method for realizing the dynamic generation of Web Service by the business process using the system of this kind of implementation mode includes the following steps:

(1) The business process service interface definition module performs business process orchestration process definition service interface information operations;

(2) The described dynamic Web Service component assembly module and the described business process service version control module perform business process hot deployment to dynamically generate Web Service operations;

(3) The disaster recovery module performs a system failure recovery operation;

(4) The security control module performs the security interception operation of the business process service;

(5) described Web Service dynamic generation module carries out business process service access operation;

(6) The dynamic service management module performs dynamic service management operations.

In a more preferred implementation manner, the business process service interface definition module includes:

The service interface metadata model resolver is used to analyze the data types supported by the BPM system;

The business process service interface definition configurator is connected with the service interface metadata model parser to define the service name and service parameters of the business process definition service interface in XML language;

The service interface definition analyzer is connected with the business process service interface definition configurator, and connected with the dynamic Web Service component assembly module, so as to convert the service interface definition into a service object.

Wherein, the data type is one or more of basic type, complex type and XSD type.

Utilize the system of this kind of embodiment to realize the method that business process dynamically generates Web Service, described business process service interface definition module carries out business process orchestration process definition service interface information operation, specifically comprises the following steps:

(11) The data types supported by the loading system of the service interface metadata model parser, the data types include simple data types and complex data types;

(12) The business process service interface definition configurator orchestrates the process and configures the service interface;

(13) The service interface definition analyzer parses the service definition in the business process into service objects.

Wherein, the complex data type is one or more of Java Bean, List, Set and Map types.

In a further preferred embodiment, the service interface definition is an XML fragment containing the interface definition structure description XSDSchema, the service interface definition contains the service interface name and the service interface parameter list, and the service interface parameter list includes the incoming parameter and return value.

In the method of using the system of this embodiment to dynamically generate a Web Service from a business process, the service interface definition analyzer resolves the service definition in the business process into a service object, specifically including the following steps:

(131) The service interface definition analyzer is injected into the service interface metadata model resolver in the BPM engine startup process;

(132) During the web interface deployment process, the service interface metadata model parser invokes the service interface definition parser to parse the service interface definition XML fragment into a Java Bean object containing a service name and a service parameter list, and caches the Java Bean object.

In another preferred embodiment, the dynamic Web Service component assembly module includes:

A service interface generator, connected to the service interface definition analyzer, generates a service virtual java interface according to the service interface definition;

The service component generator is connected to the service interface generator, and creates a service component package containing services and data type resources according to the service interface definition;

The service component scheduler connects the service component generator and the Web Service dynamic generation module, and schedules the deployment, release and destruction of the service component according to the service interface definition.

In the method of using the system of this embodiment to dynamically generate a Web Service from a business process, the dynamic Web Service component assembly module and the business process service version control module perform hot deployment of the business process to dynamically generate a Web Service operation, specifically including the following steps:

(21) The service interface generator is triggered according to the dynamic deployment of the business process to convert the service object into a virtual Java interface;

(22) The service component generator loads the virtual Java interface corresponding to the service, the data type definition XSD Schema information, and creates the service component file according to the template;

(23) The service component scheduler schedules the service components, and the scheduling includes service component deployment, release and destruction;

(24) The business process service version control module switches the version of the service component, and uses the service component of the released version as a default service.

In a further preferred embodiment, the service component includes a service assembly file, a dependent resource XSD file and a complex data type Acegis file. The service component generator loads the virtual Java interface corresponding to the service, the data type defines XSD Schema information and creates the service component file according to the template, specifically including the following steps:

(221) The service component generator invokes the virtual Java interface created by the service interface generator as the service interface;

(222) The described service component generator judges whether to rely on the relevant XSD file according to the reflection data type of the service interface, if so, then enter step (223), if not, then enter step (224);

(223) The service component generator loads the XSD file from the BPM system and puts it into the service component, and enters step (224);

(224) The service component generator judges whether to include List, Set or Map complex data types according to the reflection data type of the service interface, if so, then enter step (225), if not, then enter step (226);

(225) service component generator creates and describes the Aegis file of complex type and puts into service component, and enters step (226);

(226) The service component generator uses the template resource to create the service component.

In another preferred embodiment, the dynamic generation module of Web Service includes:

A service component loader, connected to the service component scheduler, to load the service component package;

Web Service service generator, connects described service component loader, generates Web Service service by described virtual java interface;

Web Service service access device, connected to the Web Service service generator, and connected to the dynamic service management module, disaster recovery module, security control module and business process service version control module, in order to provide Web Service calling transaction business processing.

In a more preferred embodiment, the method for realizing business process dynamic generation of Web Service in the described enterprise BPM system specifically includes the following steps:

(31) The disaster recovery module described in the disaster recovery module checks the service component status as a starting Listener when the system encounters a disaster failure and needs to restart, and determines whether to start recovery;

(32) After the disaster recovery module determines to start the recovery, it calls the dynamic Web Service component assembly module to regenerate the faulty service in the system.

The security control module performs the security interception operation of the business process service, specifically: the security control module intercepts the service request according to the user name and password configured in the system, and prohibits unauthorized users from calling it.

The described Web Service dynamic generation module performs business process service access operation, specifically: the described Web Service dynamic generation module intercepts the service request according to the user name and password configured by the system, and prohibits unauthorized users from invoking.

The dynamic service management module performs dynamic service management operations, specifically: the dynamic service management module manages all service components in the system. The management includes querying service WSDL and statistical service data.

In the practical application of the present invention, as shown in Fig. 2 to Fig. 7, in this enterprise BPM system realizes in the system and the method that business process dynamically generates Web Service, described system structure comprises:

(1) The business process service interface definition module defines the service interface of the business process, including:

(a) The metadata model parser is responsible for maintaining the data types supported by the business process dynamic Web Service, including JavaBean objects and XSD user-defined types, etc.;

(b) Business process service definition interface configuration, through the interface definition configuration process service interface description information, such as service name, service parameters, etc.;

(c) Service interface definition analyzer, which provides the capability of analyzing service interface and converts it into service-related Java objects;

(2) The service dynamic generation module is connected with the business process service interface definition module, and dynamically generates Web Service when the process is deployed, including:

(a) Service generator, through the structurally defined service definition, the service generator can simulate the Java interface;

(b) Service component generator, responsible for generating service components and dependent resource files for each service component;

(c) The service component scheduler, which schedules the publishing process after the service component is generated, including operations such as evicting the original version and updating the cache;

(d) Service version controller. The special version attribute of the business process makes the process service need version control, and the version controller maintains the service version of the current process.

Fig. 2 is the class diagram of the service dynamic generation module in the system that realizes business process dynamic generation Web Service in the enterprise BPM system of the present invention, wherein includes:

ProcessServiceModuleActivator: the implementation of the interface ModuleActivator, obtain the registered extension type in the system through the instance of ExtensionPointRegistry, and add the implementation of the extension point;

ProcessDirectProcesser: the implementation of the interface StAXArtifactProcessor, when the new component defined in the composite file is read, the read() method is called back;

ModelFactoryExtensionPoint: used to obtain the AssemblyFactory and JavaInterfaceFactory registered in the system;

AssemblyFactory: used to create new services;

JavaInterfaceFactory: used to create new java interfaces;

IProcessServiceImplementation: the implementation of process services, encapsulating process-based service information;

ProcessServiceProviderFactory: the implementation of the interface ImplementationProviderFactory, the extension point for adding runtime information, the factory of the logic provider of the process service, used to instantiate the logic provider;

ProcessServiceProvider: the logical provider of the process service, responsible for creating a specific Invoker;

ProcessDirectInvoker: The implementation of the interface invoker, the process service executor, will call back the invoke() method when calling the published Web Service.

Fig. 3 is the class diagram of the service component generator in the system that realizes business flow dynamic generation Web Service in the enterprise BPM system of the present invention, wherein includes:

IModelChangeListener: resource change listener interface;

XSDResourceChangedListener: XSD/Wsdl resource change listener;

WorkflowChangeListener: Process change listener;

DefinitionCacheService: process definition cache service;

IMessageStartEventInquire: MessageStartEvent node query interface

ResourceChangedComponentManager: component package manager;

ResourceChangedMissionFactory: Resource Changed Mission Factory;

ResourceChangedMission: component package generation task for resource changes;

XSDWSDLResourceChangedMission: XSD/Wsdl resource change component package update task;

MseWFChangeMission: MessageStartEvent process change component package update task.

(3) The disaster recovery module, when the system encounters a fault and restarts to restore the process service, automatically generates a Web Service in the BPM system according to the fault situation, including:

(a) The service recovery processor, which judges the failure situation and dynamically creates new business process services during the disaster recovery process,

So as to realize the automatic recovery of the system;

Fig. 5 is the class diagram of the disaster recovery module in the system that realizes business process to dynamically generate Web Service in the enterprise BPM system of the present invention, including:

IComponentLoad: component package loading interface;

ComponentLoadTimer: component package loading timer;

ComponentLoadTimerTask: component package loading timing task.

(4) The security control module is invoked when the above-mentioned service component generator creates the service component, and adds security to the service component according to the system security configuration, including:

(a) Security controller, which controls the security of service components and supports WS-Security protocol;

(5) The dynamic service access module, when the service caller calls the business process service, converts the Web Service call into the scheduling of the process engine, including:

(a) Dynamic service converter, mapping Web Service calls to scheduling operations of the process engine;

Fig. 4 is the class diagram of the service access module in the system that realizes business flow dynamic generation Web Service in the enterprise BPM system of the present invention, wherein includes:

Invoker: Web Service service access interface;

DynamicWebServiceInvoker: Invoker interface implementation, used to handle the access of dynamically generated Web Service services;

Message: the parameters passed in when calling the Web Service;

IMessageStartEventProcessManager: MessageStartEvent process management interface.

(6) The dynamic service management module provides management functions for dynamic Web Services in the system, including service query and service monitoring.

Based on the above system structure, it can be seen that the present invention is an extension and abstraction of the service concept in the process of design and implementation, abstracting the business process containing business meaning from the service concept, and the service can be directly mapped to the WebService in the software field , based on this idea to achieve software modularization and decoupling from the BPM system, the technology described in the present invention can be fully adapted to other fields, such as rule systems, expert systems, and decision support systems.

The core design of the present invention is to provide a framework for dynamically generating services. The framework is responsible for monitoring service generation events, executing service generation, maintaining service components, etc., and realizing dynamic service generation of business processes in the BPM system based on this framework. Realization principle of the present invention is as follows:

The BPM system uses a graphical language to describe the business execution process, and finally forms a business process whose physical structure is an XML document, which includes concepts such as process, activity, attribute definition, and event definition. It is divided into multiple standard specifications in the industry, such as XPDL , BPEL, BPMN, etc. Usually, the business process is initiated by calling the API from the client program. The process engine starts and deploys the business process combined with various resources. During the execution process, the process engine needs to execute according to the scheduling algorithm. In different links of the process operation, such as Human Task Human participation is required, while Service Task performs activities by calling local Java methods or Web Services.

From the working process of the above business process, the following concepts about business process can be abstracted:

1. Process interface: Process access is the entrance of the BPM system, that is, a set of callable APIs, including JavaAPI, WebService, Restful Web and other forms.

2. Process: The process is the basic unit of BPM system execution. The process engine in the BPM system calculates the migration route of the process according to the branch aggregation mode defined by the process.

3. Graphics: Graphics are the smallest granularity execution unit in the process, and the process engine executes different business semantics according to the configuration on the graphics;

The service interface definition in this method is an extension of the above service interface concept. By adding the service interface definition in the business process orchestration process, it meets the technical requirements of Web Service and provides a source of factual data structure for dynamically generating Web Service.

Based on the source of the factual data structure, the dynamic generation of Web Service needs to add an event listener to the process engine. Events are transformed into specific service creation and service destruction operations. At the same time, using the monitoring mechanism can maximize the decoupling of the software component structure, so that this method can be abstracted into a framework for dynamically generating Web Services. In addition, asynchronous service dynamic generation can be introduced through the event monitoring mechanism, thereby improving the overall performance of the BPM system.

The dynamic Web Service of this method uses the service component as the physical medium to release the Web Service. The service component is a physical storage structure that includes a service description file, a service resource file such as an Aegis file, and a service security configuration file. It does not depend on the specific service publishing technology (the service publishing technology is not the focus of this method), such as Aixs2, Apache CXF, Spring WS, etc.

The method for dynamically generating Web Service by business process in the BPM system based on the above-mentioned system structure, the method includes business process orchestration process definition service interface information operation, business process deployment dynamic generation Web Service operation, system failure service recovery operation, business Process service security interception operation, business process service access operation, dynamic service management operation.

The business process orchestration process defines service interface information operations, including the following steps:

(11) The service definition interface metadata parser loads the data types supported by the dynamic process service in the BPM system, including basic simple data types and complex types, and the complex types include Java Bean, List, Set, Map and self-defined XSD Data type, loading complex XSD type includes the following steps;

(a) Import the target XSD, select a local XSD definition file or provide a network URL address;

(b) Determine whether the XSD type already exists in the namespace corresponding to the imported type, if it exists, the import process fails, in order to prevent the conflict of the XSD type with the same name.

(c) The metadata parser builds a metadata database for the successfully imported XSD types.

(12) The business process service interface definition configurator configures the service interface when orchestrating the process, including the following steps;

(a) Orchestrate the business process, set the process to use the message start event (Message StartEvent described in the BPMN specification), that is, determine that the business process is started by means of a message;

(b) Define the service interface name in the message start event, such as Account Service, and define the service interface operation name, such as operation1;

(c) Set service interface parameters, select data types from the data types provided by metadata, define parameter names, and parameter types, including input parameter lists and output parameter lists;

(13) The service interface definition analyzer in the business process is parsed into a service object by the service interface definition analyzer, wherein the service definition uses an XML fragment description, and the service definition specification constraint uses an XSD Schema description, and the service generated by the service interface analyzer The object is a Java Bean;

(a) the service interface definition analyzer is injected into the business process analyzer during the BPM engine startup process;

(b) When the business process modeling and design is completed and the deployment process is submitted, the BPM engine triggers the business process parser event, and calls the business process parser to call the service interface definition parser to parse the service interface definition XML fragment to include the service name, The Java Bean object of the service parameter list, and cache the object;

The described business process deployment dynamically generates Web Service operations, including the following steps:

(21) The service generator described in (21) converts the service object into a virtual Java interface, uses the ASM framework, directly creates the Java interface with the mode of bytecode in the JVM, adopts the following conversion rules, and the service name in the service object is converted into Java The name of the virtual interface, the operation name in the service object is converted to the method name of the Java virtual interface, and the parameter list in the service object is converted to the method parameter of the Java virtual interface.

(22) The service component generator defines XSD Schema information according to the virtual Java interface and data type corresponding to the service, and the component generator creates the service component file according to the template, and the service component is a file structure that can be loaded and recognized by the service container ;

(23) The service component scheduler is responsible for scheduling service components, including service component deployment, activation, release, destruction, etc.;

(a) The service component scheduler uniformly schedules the service components created by the component generator, and the components are first deployed to the specified component warehouse;

(b) The component scheduler activates the target component, and identifies the corresponding resource file during the activation process, such as XSD, etc., which are loaded by the XSD resource processor;

(c) The component scheduler publishes the correctly activated components and provides them in the form of Web Service; 24) The version controller switches the version of the service component, and uses the service component of the released version as the default service; the system failure described Recovery operation, including the following steps:

(31) The service disaster recovery processor is that when the system encounters a disaster failure and needs to be restarted, the disaster recovery processor checks the service component status as a startup Listener to determine whether to start recovery;

(32) After the service disaster recovery processor determines to start the recovery, it calls the service generator to regenerate the faulty service in the system;

The business process service security interception operation includes the following steps:

(41) The service security controller intercepts the service request according to the user name and password configured by the system, and prohibits calls to unauthorized users;

(a) Set and enable the dynamic service security of the business process. This setting is a global setting, that is, all processes in the BPM system adopt a unified security policy, and set the user name and password of the service;

(b) The modification of security will trigger the redeployment of service components. The rules are as follows: If service security is enabled, the service component scheduler scans all service components in the BPM system and adds its security policy description.

Described as follows:

The security policy definition is set in the Definition.xml file, and the configuration is as follows

If the service security is canceled, the component scheduler scans the service components and puts the

<binding.ws policySets="sca_1.0:wsAuthenticationPolicy"/> node is deleted.

(c) User security interception is implemented by extending the CallbackHandler interface. The user name and password invoked by the Web Service match those previously set, and an exception is thrown if the user is not authorized;

The business process service access operation includes the following steps:

(51) The described dynamic Web Service access module (Invoker) is responsible for converting the Web Service call irrelevant to the BPM system into the local API call of the BPM system;

(a) Invoker analyzes the name of the currently processed business process, request parameters, etc. during the processing of the Web Service request process, and finally requests the Message Start Event of the business process to execute the start process.

(b) After the Invoker call is completed, the return result is returned to the Response of the Web Service;

(c) If an exception occurs, Invoker returns the exception information to the Fault Body;

The dynamic service management operation includes the following steps:

(61) The dynamic service management module manages all service components in the system, including query service WSDL, statistical service data, etc.

(a) The dynamic Web Service released by the BPM system needs to provide an interface to query the list of currently available services, support user calls or integration with the ESB system, etc., and the management module provides query functions.

As shown in Figure 6, it is a sequence diagram of a method for dynamically generating Web Service by implementing a business process in the enterprise BPM system of the present invention, and its sequence is:

1. When the extended configuration information is read in the composite configuration file, the read() method in ProcessDirectProcesser will be called;

2. Create an instance of ProcessServiceImplementationImpl in the read() method;

3. Set the process name in ProcessServiceImplementationImpl;

4. Set the version number;

5. Call the build() method in ProcessServiceImplementationImpl to create a Web service;

6. Call assemblyFactory.createService() to create an instance of Service;

7. Create an instance of Service;

8. Set the name of the Service instance, that is, the name of the published web service;

9. According to the process definition, create the corresponding java interface;

10. Publish wsdl through the created java interface.

In the present invention, after the business process service is released, the bridge between the client and the BPM system is WSDL (WebService Definition Language), which includes the following main elements:

types——a container for data type definitions, using XML Schema to describe the structural information of data types.

portType——A collection of abstractions describing service operations, similar to Java interfaces.

binding——The specific transmission protocol specified in the data transmission process and the data format specification of the defined operation.

service - the service provided externally.

operation—an abstract description of the operations supported in the service, describing the request/response message of the access entry and the statement of the exception.

In the process of invoking Web Service, the information exchanged between the client and the server is SOAP message, which is defined in XML format, and its structure includes the following main elements:

SOAP Body - encapsulates the data to be passed.

SOAPHeader - As an extension for passing messages, it can be added freely.

As shown in FIG. 7 , the sequence diagram of Web Service calling is dynamically generated for realizing the business process in the enterprise BPM system by using the method of the present invention. When the external system calls the web service of the published process, it will call back the invoke() method in ProcessDirectInvoker. In the invoke() method, the process name and version number are obtained through the IProcessServiceImplementation interface, and the parameters passed in when calling the Web service are obtained through the passed Message parameter. Then call the process start interface of the engine to start the process.

In the BPM system of the present invention, the method for dynamically generating Web Services from business processes includes arranging business processes on a Web interface to define service interfaces and dynamically generating Web Services. Configuration format definition for data object transformations. The general framework supporting different data object conversion extensions at runtime includes configuration loading of data object conversion, through which a directed graph of data type conversion is formed, and the shortest time required for conversion from source data type to target data type can be found according to the directed graph. Path, while providing conversion operations for different data objects when accessing services and receiving services. During data conversion, the interface metadata is described in WSDL. The configuration format definition of data object conversion in the development period includes the interface implementation for specific data type conversion and the registration of the converter.

After the above steps, the business process does not need to be coded after the arrangement, the system does not need to be restarted, and the Web Service is generated without the development of technicians, and other systems can be integrated together. From this, it can be concluded that the business process is dynamically generated by using the BPM system. Web Service The method makes the development of business processes simple and efficient, no longer needs service encapsulation, etc., and the external business services are unified and the data types are consistent.

Adopt the enterprise BPM system of this invention to realize the system that business process dynamically generates Web Service, it comprises business process service interface definition module, the dynamic Web Service component assembly module that connects this business process service interface definition module, connects this dynamic Web Service component The Web Service dynamic generation module and the disaster recovery module of the assembly module, the dynamic service management module and the security control module connected to the Web Service dynamic generation module, and the components connected with the dynamic Web Service component assembly module and the Web Service dynamic generation module respectively Business process service versioning module. The method of dynamically generating Web Service by using the business process of the system has natural integration characteristics, and the Web Service is released while the process is arranged, and the service interface standard is unified without coding. At the same time, it enhances the portability and scalability of the system, can quickly adapt to changes in business needs and technology changes, and can support the establishment of a highly modular and highly integrated software system. The development period is simple, the interface is clear, the configuration is convenient, and the operation period is efficient. It is relatively high, the system performance is stable and reliable, and the scope of application is relatively wide, which has laid a solid foundation for the integrated development of the BPM system.

In this specification, the invention has been described with reference to specific embodiments thereof. However, it is obvious that various modifications and changes can be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are to be regarded as illustrative rather than restrictive.

Claims (15)

1. realize the system that business process dynamically generates Web Service in a kind of enterprise BPM system, it is characterized in that, described system comprises: Business process service interface definition module, in order to define the Web Service interface information of business process; Described business process service interface definition module comprises: The service interface metadata model resolver is used to analyze the data types supported by the BPM system; The business process service interface definition configurator is connected with the service interface metadata model parser to define the service name and service parameters of the business process definition service interface in XML language; The service interface definition analyzer is connected with the described business process service interface definition configurator, and connected with the described dynamic Web Service component assembly module, in order to convert the service interface definition into a service object; The dynamic Web Service component assembly module is connected with the business process service interface definition module to assemble components according to the Web Service interface information of the business process; The Web Service dynamic generation module is connected with the dynamic Web Service component assembly module to load the components, generate Web Service services, and provide Web Service service access processing; The dynamic service management module is connected with the dynamic generation module of Web Service to manage the Web Service; The disaster recovery module, and the dynamic Web Service component assembly module, are used to automatically generate Web Service according to the business process in the system when the system is restarted; Security control module, is connected with described Web Service dynamic generation module, in order to Web Service service provides safety guarantee; The business process service version control module is respectively connected with the dynamic Web Service component assembly module and the Web Service dynamic generation module to provide multi-version dynamic services to the multi-version business process services existing in the system. 2. in the enterprise BPM system according to claim 1, realize the system that business process dynamically generates Web Service, it is characterized in that, described dynamic Web Service component assembly module comprises: A service interface generator, connected to the service interface definition analyzer, generates a service virtual java interface according to the service interface definition; The service component generator is connected to the service interface generator, and creates a service component package containing services and data type resources according to the service interface definition; The service component scheduler connects the service component generator and the Web Service dynamic generation module, and schedules the deployment, release and destruction of the service component according to the service interface definition. 3. in the enterprise BPM system according to claim 2, realize the system that business process dynamically generates Web Service, it is characterized in that, described Web Service dynamic generation module comprises: A service component loader, connected to the service component scheduler, to load the service component package; Web Service service generator, connects described service component loader, generates Web Service service by described virtual java interface; Web Service service access device, connected to the Web Service service generator, and connected to the dynamic service management module, disaster recovery module, security control module and business process service version control module, in order to provide Web Service calling transaction business processing. 4. a method utilizing the system described in claim 1 to realize business process dynamic generation WebService in the enterprise BPM system, is characterized in that, described method comprises the following steps: (1) The business process service interface definition module performs business process orchestration process definition service interface information operations, specifically including the following steps: (11) The data type supported by the service interface metadata model resolver loading system, the data type Including simple data types and complex data types; (12) The business process service interface definition configurator orchestrates the process and configures the service interface; (13) The service interface definition analyzer parses the service definition in the business process into a service object; (2) The dynamic Web Service component assembly module and the business process service version control module perform hot deployment of business processes to dynamically generate Web Service operations; (3) The disaster recovery module performs system failure recovery operations; (4) The security control module performs security interception operations of business process services; (5) The Web Service dynamic generation module performs business process service access operations; (6) The dynamic service management module performs dynamic service management operations. 5. in the enterprise BPM system according to claim 4, realize the method that business flow dynamically generates Web Service, it is characterized in that, described complex data type is one or more in Java Bean, List, Set and Map type . 6. in the enterprise BPM system according to claim 4, realize the method that business flow dynamically generates Web Service, it is characterized in that, described service interface definition is to comprise the XML fragment of interface definition structure description XSD Schema, and service interface definition comprises service An interface name and a service interface parameter list, the service interface parameter list includes incoming parameters and return values. 7. in the enterprise BPM system according to claim 6, realize the method that business process dynamically generates Web Service, it is characterized in that, described service interface definition analyzer resolves the service definition in business process into service object, specifically comprises the following step: (131) The service interface definition analyzer is injected into the service interface metadata model parser during the BPM engine startup process; (132) During the web interface deployment process, the service interface metadata model parser invokes the service interface definition parser to parse the service interface definition XML fragment into a Java Bean object containing the service name and service parameter list, and caches the Java Bean object. 8. in the enterprise BPM system according to claim 4, realize the method that business flow dynamically generates Web Service, it is characterized in that, described dynamic Web Service component assembly module comprises: service interface generator, connection described service interface generation The service component generator of the server and the service component scheduler connected to the service component generator, the dynamic Web Service component assembly module and the business process service version control module perform business process hot deployment to dynamically generate Web Service operations, specifically including The following steps: (21) The service interface generator triggers the conversion of the service object into a virtual Java interface according to the dynamic deployment of the business process; (22) The service component generator loads the corresponding virtual Java interface and data type definition XSD Schema information of the service, and creates the service component file according to the template; (23) The service component scheduler schedules the service components, and the scheduling includes service component deployment, release and destruction; (24) The business process service version control module switches the version of the service component, and uses the service component of the released version as the default service. 9. in the enterprise BPM system according to claim 8, realize the method that business process dynamically generates Web Service, it is characterized in that, described service component comprises service assembly file, dependent resource XSD file and complex data type Acegis file. 10. in the enterprise BPM system according to claim 9, realize the method that business process dynamically generates Web Service, it is characterized in that, described service component generator loads the corresponding virtual Java interface of service, data type definition XSDSchema information and according to template Create the service component file, including the following steps: (221) The service component generator invokes the virtual Java interface created by the service interface generator as the service interface; (222) The service component generator determines whether it depends on the relevant XSD file according to the reflection data type of the service interface, if yes, then enters step (223), if not, then enters step (224); (223) The service component generator loads the XSD file from the BPM system into the service component, and enters step (224); (224) The service component generator judges whether the complex data type of List, Set or Map is included according to the reflection data type of the service interface, and if so, proceeds to step (225), if not, proceeds to step (226); (225) The service component generator creates an Aegis file describing complex types and puts it into the service component, and enters step (226); (226) The service component generator uses template resources to create service components. 11. in the enterprise BPM system according to claim 4, realize the method that business process dynamically generates Web Service, it is characterized in that, described disaster recovery module carries out system failure recovery operation, specifically comprises the following steps: (31) The disaster recovery module is used as a startup Listener to check the status of the service component when the system encounters a disaster and needs to be restarted, and determines whether to start the recovery; (32) After the disaster recovery module determines to start the recovery, it calls the dynamic Web Service component assembly module to regenerate the faulty service in the system. 12. in the enterprise BPM system according to claim 4, realize the method that business process dynamically generates Web Service, it is characterized in that, described security control module carries out business process service security interception operation, specifically: The security control module intercepts the service request according to the user name and password configured by the system, and prohibits unauthorized users from invoking it. 13. in the enterprise BPM system according to claim 4, realize the method that business process dynamically generates Web Service, it is characterized in that, described Web Service dynamic generation module carries out business process service access operation, specifically: The described Web Service dynamic generation module intercepts the service request according to the user name and password configured by the system, and prohibits unauthorized users from invoking. 14. in the enterprise BPM system according to claim 4, realize the method that business process dynamically generates Web Service, it is characterized in that, described dynamic service management module carries out dynamic service management operation, specifically: The dynamic service management module manages all service components in the system. 15. The method for realizing business process dynamic generation Web Service in the enterprise BPM system according to claim 14, is characterized in that, described management comprises inquiry service WSDL and statistical service data.

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