KR100549381B1 - Method For Transforming From BPEL To BPML - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method of converting from BPEL (Business Process Execution Language) to BPML (Business Process Modeling Language).

2. Technical problem to be solved by the invention

The present invention provides a method of converting from BPEL to BPML to enable reference of the composition of a web service described as BPEL in a system supporting BPML by converting the executable business process of BPEL into a corresponding BPML process. There is a purpose.

In addition, the present invention provides a method for converting from BPEL to BPML for calculating a business process description document following BPEL in a system supporting BPML by converting a BPEL executable business process into a corresponding BPML process. has exist.

3. Summary of Solution to Invention

The present invention provides a basic activity processing step of generating an element of a BPML corresponding to an element performing a basic activity of a BPEL, and a structured activity of generating an element of a BPML corresponding to an element of structuring multiple activities of a BPEL. The processing step, the execution environment processing step of generating an element of BPML corresponding to the element describing the execution environment inside the structured activity of the BPEL, the correspondence of the BPML based on the element specifying the order in the parallel structure between the activities of the BPEL A source / target processing step of generating an element to be formed, and a process generation step of generating an element describing an execution environment of a BPML in response to a request of the execution environment processing step.

4. Important uses of the present invention

The present invention can be used to manage web services.

Transformation, Business Process, BPEL, BPML

Description

Method for Transforming From BPEL To BPML}             

1 is a block diagram of a converter for converting Business Process Execution Language (BPEL) into Business Process Modeling Language (BPLM) according to the present invention;

2A and 2B are flowcharts of the basic activity processor of FIG. 1 generating corresponding elements of the BPML;

3A and 3B are flow charts in which the structured activity processor of FIG. 1 generates corresponding elements of a BPML;

4 is a flowchart in which the source / target processing unit of FIG. 1 processes elements specifying an order in the parallel structure of the activity;

5 is a flowchart in which an execution environment processor of FIG. 1 processes elements describing an execution environment of an activity;

FIG. 6 is a flowchart in which the process generator of FIG. 1 processes an "scope" element describing an execution environment of an activity;

7 is a view for explaining a BPEL document composed of elements of a BPEL;

FIG. 8 is a diagram for explaining that the BPEL element of FIG. 7 is converted into a corresponding BPML element.

Explanation of the main references in the drawings

110: BPEL-to-BPML converter 120: basic activity processing unit

130: structured activity processing unit 140: execution environment processing unit

150: source / target processing unit 160: process generation unit

The present invention relates to a method of converting an executable process of a BPEL into a corresponding BPML process.

Web Services are modular applications that accept requests in Extensible Markup Language (XML) format from other systems on the network through vendor-neutral, ultra-lightweight communication protocols. By definition, web services are a new distributed computing technology because the subjects requesting them are other systems on the network. To make the protocols lightweight, security, transaction management, etc. are handled by other extension specifications.

And a system that implements a Web services stack using vendor-neutral open protocols will be interoperable regardless of operating system. The current standard for web services includes Web Services Description Language (WSDL), XML-based messaging that describes what services a web service provides, how to access the web service, and what type of response is expected. Protocols include Simple Object Access Protocol (SOAP), and Universal Description, Discovery and Integration (UDDI), a directory service for registering and retrieving Web services.

Any application that is network-accessible and XML-aware can use these standards to invoke Web services regardless of programming language or operating system.

Therefore, legacy applications can be called and used by other applications through the network after being registered as web services. These characteristics make Web services an innovative solution for integration in distributed environments. In particular, it is expected to be effectively used for component reuse of enterprise application integration (EAI), business to business (B2B) applications, and intranets.

Only basic web services are available through WSDL, SOAP, and UDDI. But the service you want to provide using a real web service is much more complicated.

For example, in order to implement a business process of purchasing goods on the Internet as a web service, a web service requesting a consumer to purchase the product, a web service that examines the stock of the requested product, and a willingness to sell if there is stock Several web services must be connected and organized according to the business logic, such as web services that are not in stock, web services that notify of out-of-stocks, web services that confirm consumer deposits, and web services that require parcel delivery.

W3C's Web Service Choreography Interface (WSCI) for expressing these business processes as Web service compositions, and BPML (Business Process Management Initiative) for Business Process Execution Language for Web Services (BPEL4WS) and Business Process Management Initiative (BPMI.org) from IBM and Microsoft. Business Process Modeling Language).

As such, a business process refers to a choreography sequence of a plurality of business activities. Business processes are largely divided into public business processes and private business processes. Public business processes are collaborative processes that are shared among participants in the B2B integration domain, while private business processes are internal processes used by EAI for systems within an enterprise.

Among the above-mentioned WSCI, BPEL4WS, and BPML, BPEL4WS and BPML are the web service composition standards that describe a company's executable internal processes.

BPML is an XML-based meta language developed by BPMI.org as a way to model business processes. BPMI.org includes vendors from Intalio, SAP and Sun. BPML provides an abstracted execution model based on the concept of a finite-state machine that includes transactions. It is complementary to WSCI, which supports collaborative business processes.

BPEL4WS (BPEL) is a Web orchestration language created in 2002 by integrating Microsoft's XLANG with IBM's WSFL. An orchestration describes how Web services interact at the message level, which includes the business logic and the order in which the interactions are executed.

That is, when BPEL's business process receives a message requesting to provide a service from the outside, the BPEL describes a business procedure that calls an external web service to receive additional data and responds to the requester. Complex business logic is described in this BPEL business process as the composition of the Web service.

IBM, Microsoft, and BEA submitted the BPEL specification to OASIS in April 2003 to adopt the standard, and OASIS formed the OASIS BPEL Technical Committee to evolve the specification.

The standards for Web service composition are largely divided into WSCI and BPML alliance and BPEL. The current trends in the IT industry related to web services are as follows.

Major vendors supporting each standard are speeding up their standardization efforts through different standards bodies. Based on this, the implementation of products conforming to each standard is also active.

Intalio and Vergil Technologies have introduced products that implement BPML in conjunction with WSCI, and Sun Microsystems offers the Sun ONE WSCI editor, which supports WSCI.

IBM, on the other hand, provides BPWS4J, an editor and BPEL engine for BPEL, BindSystems provides BPEL modeling and editing tools, and Collaxa provides an execution platform for BPEL. Microsoft and BEA have announced that they will produce BPEL-based products in the future. As such, competition between the two specifications for the web service product market advantage in the industry continues, and for the time being, the standard specifications for web service composition are independent of WSCI and BPEL, and technically complementary and industrially competitive. It is expected to develop into.

As such, BPML and BPEL require different interconversion technologies between BPML and BPEL for business processes that can be developed independently with the support of different major vendors at BPMI.org and OASIS. It is done.

The present invention was devised to meet the above demands, and by converting a BPEL executable business process into a corresponding BPML process, it is possible to refer to the composition of a web service described in BPEL in a system supporting BPML. The purpose is to provide a conversion method from BPEL to BPML.

In addition, the present invention provides a method for converting from BPEL to BPML for calculating a business process description document following BPEL in a system supporting BPML by converting a BPEL executable business process into a corresponding BPML process. have.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The present invention provides a basic activity processing step of generating an element of a BPML corresponding to an element performing a basic activity of a BPEL, and a structured activity of generating an element of a BPML corresponding to an element of structuring multiple activities of a BPEL. Processing step, generating an element of BPML corresponding to an element describing an execution environment inside a structured activity of a BPEL processing step, element of a BPML corresponding to an element specifying an order in a parallel structure between activities of a BPEL And a process generation step of generating an element describing an execution environment of the BPML in response to a request of the source / target processing step of generating a and the execution environment processing step.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description, elements and attributes are components that constitute a markup language document such as an XML document. Elements are represented using tags, and attributes are used to describe detailed attributes of the element.

An activity is also a business process component that performs one particular function. Typically, an activity can be divided into a basic activity, which is an atomic activity, and a structured activity composed of a plurality of activities.

1 is a block diagram of a converter for converting BPEL into BPML according to the present invention.

As shown, the process composed of BPEL documents is converted to BPML process by the BPEL-to-BPML converter 110.

In addition, the BPEL-to-BPML converter 110 corresponds to an element for structuring a plurality of activities of the BPEL, the basic activity processing unit 120 for generating an element of the BPML corresponding to the element for performing the basic activity of the BPEL. Structured activity processing unit 130 to generate an element of the BPML that is to be, execution environment processing unit 140 to generate an element of the BPML corresponding to the element describing the execution environment inside the structured activity of the BPEL, activity of the BPEL A program for generating an element describing an execution environment of the BPML in response to a request of the source / target processing unit 150 and the execution environment processing unit 140 that generate the elements of the BPML corresponding to the ordering elements in the parallel structure between the programs. The set generator 160 is included.

The basic activity processing unit 120 considers when the element performing the basic activity of the BPEL includes and does not include the "source" or "target" elements that specify the order in the parallel structure between the activities. Create an element.

If the element of the BPEL does not include a "source" element or a "target" element, the element of the BPML corresponding to the element of the BPEL is generated only by the basic activity processing unit 120, the element of the BPEL is "source" When the element includes a "element" or a "target" element, the element of the BPML corresponding to the element of the BPEL is the basic activity processor 120 and the source / target processor 150 that processes the "source" element and the "target" element. It is created by the linkage of.

In addition, the structured activity processing unit 130 also considers whether an element structuring a plurality of activities includes or does not include a "source" element or a "target" element that specifies an order in a parallel structure between activities. To create an element of BPML.

When the element of the BPEL does not include a "source" element or a "target" element, the element of the BPML corresponding to the element of the BPEL is generated only by the structured activity processing unit 130, and the element of the BPEL is " In the case of including a source "or" target "element, the element of the BPML corresponding to the element of the BPEL is a structured activity processor 130 and a source / target processor 150 that processes the" source "element and the" target "element. ) Is generated by linkage.

In addition, the "flow", "sequence", "while", and "scope" elements processed by the structured activity processor 130 may include a "scope" element that describes an execution environment therein, and in particular, a "flow" element. The "element may include a" link "element.

Therefore, when the element includes a "scope" element or a "link" element, the structured activity processor 130 cooperates with the execution environment processor 140 to generate an element of the BPML corresponding to the BPEL.

In addition, the execution environment processor 140 interworks with the process generator 150 to process the "scope" element.

The process of processing elements in each component of the BPEL-to-BPML converter 110 is described in more detail in conjunction with the flow chart below.

2A and 2B are flowcharts of generating an element of a BPML corresponding to an element performing a basic activity by a basic activity processing unit of a BPEL according to the present invention.

As shown in FIGS. 2A and 2B, the basic activity processing unit 120 performs the elements "invoke", "receive", "reply", "empty", "throw", and "compensate" of the BPEL that performs the basic activity. Create elements of BPML corresponding to "," assign "and" wait ".

The basic activity processor 120 determines whether an element of the BPEL is an "invoke", "receive", or "reply" element (200), and if it is an "invoke", "receive", or "reply" element, the "source" as a dependent element. Or if it includes a "target" element (205).

When the determination result 205, the "invoke", "receive" or "reply" element includes a "source" or "target" element as a dependent element, the basic activity processing unit 120 is the "invoke" of the BPEL , the “action” element of the BPML corresponding to the “receive” or “reply” element is generated in cooperation with the source / target processing unit 150.

A process in which the source / target processor 150 interworks with the basic activity processor 120 will be described later with reference to FIG. 4.

If the determination result 205 indicates that the "invoke", "receive" or "reply" element does not include a "source" or "target" element as a dependent element, the "invoke", "receive" or " The "action" element of the BPML corresponding to the reply "element is generated by the basic activity processing unit 120 (210).

In addition, if the element of the BPEL is not an “invoke”, “receive” or “reply” element, the basic activity processor 120 determines whether the element of the BPEL is an “empty” element (215).

As a result of the determination 215, when the element of the BPEL is an "empty" element, the basic activity processor 120 determines whether the "empty" element of the BPEL includes a "source" or "target" element as a dependent element. If 220 includes a "source" or a "target" element as a dependent element, it interworks with the source / target processing unit 150 to generate an "empty" element of the corresponding BPML.

If the determination result 220, the "empty" element of the BPEL does not include a "source" or "target" element as a dependent element, the "empty" element of the BPML corresponding to the "empty" element of the BPEL It is generated by the basic activity processing unit 120 (225).

Also, if the element of the BPEL is not an "empty" element, the basic activity processor 120 determines whether the element of the BPEL is a "throw" element (230).

As a result of the determination 230, when the element of the BPEL is a "throw" element, the basic activity processor 120 determines whether the "throw" element includes a "source" or "target" element as a dependent element (235). ), If it includes a "source" or "target" element as a dependent element, the basic activity processing unit 120 generates a "fault" element of the corresponding BPML in cooperation with the source / target processing unit 150.

If the determination result 235 indicates that the "throw" element includes a "source" or "target" element as a dependent element, the "fault" element of the BPML corresponding to the "throw" element is a basic activity processor. Generated by 120 (240).

In addition, if the element of the BPEL is not a "throw" element, the determination result 230, the basic activity processing unit 120 determines whether the element of the BPEL is a "compensate" element (245).

As a result of the determination 245, if the element of the BPEL is a "compensate" element, it is determined whether the "compensate" element includes a "source" or "target" element as a dependent element (250), and a "source" as a dependent element. Alternatively, when the "target" element is included, the basic activity processor 120 generates a "compensate" element of the corresponding BPML in cooperation with the source / target processor 150.

If the determination result 250 indicates that the "compensate" element of the BPEL does not include a "source" or "target" element as a dependent element, the "compensate" element of the BPML corresponding to the "compensate" element is a basic activity. Generated by the vertex processing unit 120 (255).

At this time, the basic activity processing unit 120 sets the value of the "process" attribute of the BPML "compensate" element to the value of the "scope" attribute of the BPEL "compensate" element.

In addition, if the element of the BPEL is not a "compensate" element, the basic activity processor 120 determines whether the element of the BPEL is an "assign" element (260).

As a result of the determination 260, if the element of the BPEL is an "assign" element, it is determined whether the "assign" element includes a "source" or "target" element as a dependent element (265), so that the "assign" element is Including the "source" or "target" element as the dependent element, the basic activity processing unit 120 generates the "assign" element of the corresponding BPML in cooperation with the source / target processing unit 150.

If the determination result 265 indicates that the "assign" element of the BPEL does not include a "source" or "target" element as a dependent element, one for each "copy" element that is a dependent element of the "assign" element of the BPEL. An "assign" element of the BPML of is generated by the basic activity processing unit 120 (270).

In addition, the basic activity processor 120 determines whether the "from" element that is the dependent element of the generated "assign" element has a value of a "variable" attribute or a "expression" attribute or a literal text value. 275, if the "from" element has a "variable" attribute, create a "source" element as a dependent element of the "assign" element of the BPML (280).

In addition, when the determination result 275 indicates that the "from" element has the "expression" attribute or the "literal text", the basic activity processor 120 generates the "value" element as a dependent element of the "assign" element of the BPML. (285).

On the other hand, when the determination result 260, if the element of the BPEL is not the "assign" element, the basic activity processing unit 120 determines whether the element of the BPEL is a "wait" element (288).

As a result of the determination (288), if the element of the BPEL is a "wait" element, it is determined whether the "source" or "target" element is included as a dependent element (290), and a "source" or "target" element is defined as a dependent element. If included, the basic activity processor 120 generates a "delay" element of the corresponding BPML in cooperation with the source / target processor 150.

If the determination result 290 does not include a "source" or "target" element as a dependent element, the "delay" element of the BPML corresponding to the "wait" element is generated by the basic activity processor 120. do.

In this case, the basic activity processor 120 determines whether the "wait" element has an "for" attribute or a "until" attribute (292), and the "wait" element has a "for" attribute. If a "delay" of the BPML having a "duration" attribute is generated (294), and if the "wait" element has a "until" attribute, generates a "delay" of a BPML having an "instant" attribute (296).

Through this process, the basic activity processor 120 generates an element of BPML corresponding to an element of BPEL that performs the basic activity.

3A and 3B are flowcharts of the structured activity conversion unit of the BPEL according to the present invention to generate an element of the BPML corresponding to an element of the BPEL for structuring various activities.

As shown in FIGS. 3A and 3B, the structured activity processing unit 130 of the BPEL corresponds to the elements "flow", "sequence", "while", "scope", switch ", and" pick "of the BPEL. It is created as an element of BPML.

Each of the "flow", "sequence", "while", and "scope" elements may include a "scope" element that describes the execution environment of the activity therein. In particular, the "flow" element represents a "link" element. It may include, it is executed by the execution environment processor 140 to process the "scope" or "link" element.

A process of the execution environment processor 140 processing the "scope" or "link" element will be described later with reference to FIG. 5.

The structured activity processing unit 130, like the basic activity processing unit 120, functions to determine whether each element includes a "source" or "target" element as a dependent element.

First, the structured activity processing unit 130 determines whether an element of the BPEL is a "flow" element (300).

As a result of the determination 300, when the element of the BPEL is a "flow" element, it is determined whether the "flow" element includes a "source" or "target" element as a dependent element (305), so that the "flow" element is If the subordinate element includes a "source" or "target" element, the structured activity processor 130 generates an "all" element of the corresponding BPML in cooperation with the source / target processor 150.

A process of the source / target processor 150 processing the “source” or “target” element will be described later with reference to FIG. 4.

If the determination result 305 does not include a "source" or "target" element as a dependent element, the "all" element of the BPML corresponding to the "flow" element is determined by the structured activity processor 130. Is generated 310.

On the other hand, if the determination result 300, the element of the BPEL is not "flow", the structured activity processing unit 130 determines whether the element of the BPEL is a "sequence" element (315).

As a result of the determination 315, when the element of the BPEL is a "sequence" element, the structured activity processing unit 130 determines whether the "sequence" element includes a "source" or "target" element as a dependent element ( 320, when the "sequence" element includes a "source" or "target" element as a dependent element, the "sequence" element is interworked with the source / target processing unit 150 to generate a "sequence" element of the corresponding BPML.

If the determination result 320 indicates that the "sequence" element of the BPEL does not include a "source" or "target" element as a dependent element, the "sequence" element of the BPML corresponding to the "sequence" element of the BPEL is structured. The generated activity processor 130 is generated (325).

As a result of the determination 315, if the element of the BPEL is not "sequence", the structured activity processing unit 130 determines whether the element of the BPEL is a "while" element (330).

As a result of the determination 330, when the element of the BPEL is a "while" element, the structured activity processing unit 130 determines whether the "while" element includes a "source" or "target" element as a dependent element ( 335) If the "while" element includes a "source" or "target" element as a dependent element, the "while" element of the corresponding BPML is generated in cooperation with the source / target processing unit 150.

If the determination result 335 indicates that the "while" element of the BPEL does not include a "source" or "target" element as a dependent element, the "while" element of the BPML corresponding to the "sequence" element of the BPEL is structured. The generated activity processing unit 130 is generated (340).

As a result of the determination 330, if the element of the BPEL is not a "while" element, the structured activity processing unit 130 determines whether the element of the BPEL is a "scope" element (345).

As a result of the determination 345, when the element of the BPEL is a "scope" element, the structured activity processing unit 130 determines whether the "scope" element includes a "source" or "target" element as a dependent element ( 350, when the subordinate element includes a "source" or "target" element, the source / target processor 150 interworks with the source / target processor 150 to generate a "call" element of the BPML corresponding to the "scope" element.

If the determination result 350 indicates that the "scope" element does not include a "source" or "target" element as a dependent element, the "call" element of the BPML corresponding to the "scope" element is structured activity. Generated by the processing unit 130 (355).

In this case, the "scope" element is a "variable" element that lists the variable to be used as a dependent element, a "correlationSets" element related to message identification, an "faultHandlesrs" element for handling exceptions, a "compensationHandler" element for processing transactions, and event handling. It describes the execution environment, such as the "eventHandlers" element.

As such, the "scope" element describing the execution environment may correspond to the "process" element including the "context" element describing the execution environment as a dependent element in BPML. Thus, the execution environment described in the "scope" element is defined in the "process" element, which translates the "scope" element into a "call" element that calls the "process" element in BPML.

The process generator 160 generating the “process” element corresponding to the “scope” element will be described later with reference to FIG. 6.

As a result of the determination 345, if the element of the BPEL is not a "scope" element, the structured activity processing unit 130 determines whether the element of the BPEL is a "switch" element (360).

As a result of the determination 360, when the element of the BPEL is a "switch" element, the structured activity processing unit 130 determines whether the "switch" element includes a "source" or "target" element as a dependent element ( 365), when the subordinate element includes the "source" or "target" element, it interworks with the source / target processing unit 150 to generate a "switch" element of the corresponding BPML.

If the determination result 365 shows that the "switch" element of the BPEL does not include a "source" or "target" element as a dependent element, the "switch" element of the BPML corresponding to the "switch" element of the BPEL is structured. The generated activity processor 130 is generated (370).

In this case, the structured activity processor 130 determines whether the dependent element of the "switch" element of the BPEL is a "case" element or an "otherwise" element (375), and the dependent element of the "switch" element of the BPEL. If is a "case" element, create a "case" element as a dependent element of the "switch" element of the BPML (380).

In operation 384, when the dependent element of the "switch" element of the BPEL is the "otherwise" element, the "default" element is generated as the dependent element of the "switch" element of the BPML (384).

In addition, when the determination result 360 indicates that the element of the BPEL is not a "switch" element, the structured activity processor 130 determines whether the element of the BPEL is a "pick" element (386).

As a result of the determination 386, when the element of the BPEL is a "pick" element, the structured activity processing unit 130 determines whether it includes a "source" or "target" element as a dependent element (388), Including the "source" or "target" element in conjunction with the source / target processing unit 150 generates a "choice" element of the corresponding BPML.

If the determination result 388 does not include a "source" or "target" element as a dependent element, the "choice" element of the BPML corresponding to the "pick" element is generated by the structured activity processor 130. 390.

In this case, the structured activity processing unit 130 determines whether the dependent element of the "pick" element of the BPEL is an "onMessage" element or an "onAlarm" element (392), and the dependent element of the "pick" element is "onMessage". If the element is an "action" element is created 394 as a dependent element of the "choice" element of the BPML.

In operation 398, when the dependent element of the “pick” element is an “onAlarm” element, the “delay” element is generated as a dependent element of the “choice” element of the BPML (398).

Through this process, the structured activity processor 130 generates an element of BPML corresponding to an element of BPEL that performs the structured activity.

4 is a flowchart in which a source / target processor of the BPML processes "source" and "target" elements according to the present invention.

All BPEL activities can have "source" and "target" elements by default as dependent elements. The "source" and "target" elements are linked by the "link" element inside the "flow" element and determine the order between the two elements linked by the "link" element between parallel element executions within the "flow" element. In BPML, the concept of these "link" and "source" and "target" elements does not exist, so use the "signal" and "raise" and "synch" elements instead.

As shown, the source / target processor 150 determines whether the element of the BPEL includes a "source" or "target" element as a dependent element.

An element including the "source" element as a dependent element is performed before an element including the "target" element as a dependent element. Therefore, when several elements are executed in parallel, the order of execution may be determined according to the dependent elements included in each element.

First, the source / target processor 150 determines whether an element of the BPEL includes only a "source" element as a dependent element (400).

As a result of the determination 400, if an element of the BPEL includes only a "source" element as a dependent element, the source / target processing unit 150 generates a "sequence" element that guarantees sequential performance of each activity (405). Create an element of the corresponding BPML of the BPEL as a dependent element of the "sequence" element (410).

Thereafter, the source / target processor 150 generates a "raise" element as a dependent element of the "sequence" element (415) to implement the same effect as the "source" element of the BPEL.

In addition, if the element 400 of the BPEL does not include a "source" element as a dependent element, the determination result 400 determines whether the source / target processing unit 150 includes only the "target" element (420).

As a result of the determination 420, if the element of the BPEL includes only the "target" element as a dependent element, the source / target processing unit 150 generates a "sequence" element that guarantees the sequential execution of each activity (425). As a dependent element of the "sequence" element, a "synch" element of the BPML corresponding to the "target" element is generated 410 to implement the same effect as the "target" element of the BPML.

Thereafter, an element of BPML corresponding to an element of the BPEL is generated as a dependent element of the “sequence” element (415).

In addition, when the determination result 420, if the element of the BPEL does not include only the "target" element as a dependent element, the source / target processing unit 150 determines whether to include the "source" element and the "target" element (440) .

As a result of the determination 440, if the element of the BPEL includes a "source" element and a "target" element as dependent elements, the source / target processing unit 150 generates a "sequence" element that guarantees sequential performance between activities. In operation 445, the “synch” element is generated as the dependent element (450). Then, the source / target processor 150 generates an element corresponding to the element of the BPEL as the dependent element of the “sequence” element ( 455).

 In addition, a "raise" element is generated as a subordinate element of the "sequence" element (460) to be sequentially executed between the activities.

Through this process, the source / target processing unit 150 generates the "synch" and "raise" elements of the BPML having the same effect as the "source" or "target" elements that specify the order between the activities of the BPEL.

5 is a flowchart in which an execution environment processor of the BPEL processes a "scope" element and a "link" element according to the present invention.

As shown, the execution environment processor 140 determines whether the element having the "scope" element or the "link" element as a dependent element among the elements for performing the structured activity of the BPEL (500).

As a result of the determination 500, if an element of the BPEL includes at least one of a "scope" or a "link" element as a dependent element, the execution environment processor 140 generates a "context" element as a dependent element of the BPML element.

In addition, the execution environment processor 140 determines whether the dependent element included in the element of the BPEL is a “link” element (510). If the dependent element is a “link” element, the execution environment processor 140 determines “ create a signal "element (515).

As a result of the determination (510), it is determined whether the dependent element included in the element of the BPEL is a "scope" element or not (520). In addition, since an element of the BPEL including the “link” element may also include a “scope” element, after generating the “signal” element, it is determined whether the dependent element also includes the “scope” element (520).

As a result of the determination 520, when the element of the BPEL includes a "scope" element as a dependent element, the execution environment processor 140 processes the "scope" element in cooperation with the process generation unit 160 (525). ).

The process of processing the “scope” element in the process generator 160 will be described later with reference to FIG. 6.

After processing the "scope" element, an element of BPML corresponding to another element inside the BPEL element is generated (530).

As a result of the determination 500, when the element of the BPEL does not include a "link" or "scope" element, an element of BPML corresponding to another element inside the BPEL element is generated (530).

6 is a flowchart of processing a "scope" element of a BPEL in a process generation unit according to the present invention.

As shown, the process generating unit 160 generates a "process" element of the BPML corresponding to the "scope" element of the BPEL (600).

In addition, the process generating unit 160 generates a "context" element as a dependent element of the "process" element of the BPML (605).

Thereafter, the process generator 160 determines whether the “scope” element of the BPEL includes a “variable” element as a dependent element (610).

As a result of the determination 610, when the "scope" element of the BPEL has a "variable" element as a dependent element, the process generating unit 160 selects the "property" element of the BPML for each "variable" element. Create as a dependent element of the element (615).

In addition, when the process generating unit 160 determines whether the "scope" element is included in the "scope" element of the BPEL (620), the process generating unit 160 is executed to process the "scope" element. 625.

In addition, the process generation unit 160 determines whether the "scope" element of the BPEL includes the "eventHandlers" element as a dependent element (630).

If the determination result 630 includes the "eventHandlers" as the dependent element, the process generating unit 160 determines whether the "eventHandlers" element includes the "onMessage" as the dependent element or the "onAlarm" element as the dependent element. (635).

As a result of the determination 635, when the "eventHandlers" element includes "onMessage" as the dependent element, the process generating unit 160 adds an "exception" element corresponding to the "eventHandlers" element to the dependent element of the "context" element. Create an "event" element as a dependency of the "exception" element. In addition, the process generating unit 160 generates a BPML element corresponding to an element inside the “onMessage” as a dependent element of the “exception” element (640).

As a result of the determination 635, when the "eventHandlers" element includes the "onAlarm" element as a dependent element, the process generating unit 160 sets a "schedule" element corresponding to "eventHandlers" as a dependent element of the "context" element. Create a "faults" element and then create a "case" element as a dependent element of the "faults" element (650).

In addition, the process generation unit 160 determines whether the "scope" element of the BPEL includes "faultsHandlers" as a dependent element (655), and if so, the "faultsHandlers" element includes a "catch" element as a dependent element. Whether it contains a "catchAll" element (660).

As a result of the determination 660, if the "faultsHandlers" element includes a "catch" element as a dependent element, a "faults" element is created as a dependent element of the "context" element, and then as a dependent element of the "faults" element. Create a "case" element (665).

As a result of the determination 660, when the "faultsHandlers" element includes the "catchAll" element as a dependent element, the "faults" element is created as a dependent element of the "context" element and then as a dependent element of the "faults" element. Create a "default" element (675).

In addition, the process generating unit 160 determines whether the "scope" element of the BPEL includes "compensationHandler" as a dependent element (680), and if so, the "context" element converts the "compensation" element into a dependent element. Since it cannot be included, the "compensation" element is created as a dependent element of the "process" element.

FIG. 7 is a diagram for describing a document of a BPEL composed of "source", "target", "link", and "invoke" elements of FIGS. 3 and 4.

As shown, a "link" element is declared inside a "flow" element, and the "invoke" element named "X" and the "invoke" element named "Y" are connected by the "link" element. . Also, an "invoke" element named "X" contains a "source" element whose link is "XtoY" as a dependent element, and an "invoke" element named "Y" has a link "XtoY" as a dependent element. Contains a "target" element.

In this case, the "invoke" element with the name "X" containing the "source" element with the link "XtoY" as the dependent element is performed first, and the "target" element with the link "XtoY" as the dependent element. An "invoke" element with the containing name "Y" is performed later. The source / target processing unit 150 generates “synch” and “raise” elements of the BPML corresponding to the “source” element and the “target” element that specify the order between the elements.

FIG. 8 is a diagram for explaining that the BPEL element of FIG. 7 is converted into a corresponding BPML element.

As shown, the "all" element of the BPML corresponding to the "flow" element of the BPEL is generated, and the dependent element of the "all" element because the "flow" element includes the "link" element as a dependent element. Creates a "context" element.

Also, a "signal" element with a name of BPML "XtoY" is generated corresponding to a "link" element with a name of BPEL of "XtoY".

In addition, an "action" element named "X" is created corresponding to an "invoke" element named "X", and a "raise" signal whose signal is "XtoY" corresponding to a "source" element whose link is "XtoY". The element "is created, and these two elements are included as subordinates of the" sequence "element for sequential execution.

The "action" element with the name "X" is defined before the "raise" element with the signal "XtoY" so that the "action" element with the name "X" is executed first and then the signal is "XtoY". To generate a signal by the "raise" element.

Also, a "synch" element with a signal of "XtoY" is created in response to a "target" element with a link of "XtoY", and an "action" named "Y" with a "invoke" element with a name of "Y". The element "is created, and these two elements are included as subordinates of the" sequence "element for sequential execution.

The "action" element named "Y" is defined after the "synch" element whose signal is "XtoY" so that the signal generated by the "raise" element whose signal is "XtoY" is "XtoY". This is to cause the "action" element named "Y" to be executed after being synchronized by the "synch" element.

Thus, an "action" element named "Y" containing a "synch" element whose signal is "XtoY" as a dependent element is named "X" containing a "raise" element whose signal is "XtoY" as a dependent element. Runs later than the "action" element.

This means that an "invoke" element named "Y" that contains a "target" element whose link is "XtoY" as a dependent element of BPEL is named "source" which contains a "source" element whose link is "XtoY" as a dependent element. This is the same principle as running late than the "invoke" element, which is X ".

The BPEL to BPML conversion method of the present invention as described above may be stored in a computer-readable recording medium. Such recording media include all kinds of recording media on which programs and data are stored so that they can be read by a computer system. Examples of the recording media include read only memory, random access memory and compact disk. ROM, Digital Video Disk (DVD) -Rom, magnetic tape, floppy disk, optical data storage device.

In addition, such recording media can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The present invention may enable reference of the composition of a web service described in BPEL in a system supporting BPML by converting BPEL into BPML.

In addition, the present invention can calculate a BPEL-compliant business process description document in a system supporting BPML by converting BPEL into BPML.

Claims (27)

A basic activity processing step of generating an element of BPML corresponding to an element that performs basic activity of BPEL; A structured activity processing step of generating an element of BPML corresponding to an element structuring several activities of the BPEL; An execution environment processing step of generating an element of the BPML corresponding to an element describing the execution environment inside the structured activity of the BPEL; A source / target processing step of generating a corresponding element of the BPML based on an element specifying the order between the activities in the parallel structure between the activities of the BPEL; And A process generation step of generating an element describing an execution environment of a BPML in response to a request of the execution environment processing step To BPML conversion method for executable business processes, including: The method of claim 1, The source / target processing step, If the element of the BPEL includes only the "source" element as a dependent element, creating a "sequence" element that ensures the sequential performance of each activity; Generating an element of BPML corresponding to an element of the BPEL as a dependent element of the “sequence” element; If the BPEL element is an element that structures several activities, executing an execution environment processing step to process an execution environment of an activity inside the BPEL element; And Creating a "raise" element as a dependent element of the "sequence" element To BPML conversion method for executable business processes, including: The method of claim 1, The source / target processing step, If an element of the BPEL includes only a "target" element as a dependent element, creating a "sequence" element that ensures sequential performance of each activity; Creating a "synch" element as a dependent element of the "sequence" element; Generating an element of BPML corresponding to an element of the BPEL as a dependent element of the "sequence" element; And If the BPEL element is an element that structures multiple activities, executing an execution environment processing step to process an execution environment of an activity inside the BPEL element To BPML conversion method for executable business processes, including: The method of claim 1, The source / target processing step, If an element of the BPEL includes a "source" element and a "target" element as dependent elements, creating a "sequence" element that ensures sequential performance of each activity; Creating a "synch" element as a dependent element of the "sequence" element; Generating an element of BPML corresponding to an element of the BPEL as a dependent element of the "sequence" element; If the BPEL element is an element that structures several activities, executing an execution environment processing step to process an execution environment of an activity inside the BPEL element; And Creating a "raise" element as a dependent element of the "sequence" element To BPML conversion method for executable business processes, including: The method of claim 1, The basic activity processing step, Determining whether an "invoke", "receive" or "reply" element of an BPEL element includes a "source" or "target" element as a dependent element; If the dependent element includes the "source" or "target" element, executing the source / target processing step to process the "sourece" or "target" element; Creating an “action” element of BPML corresponding to the BPEL element; And If the dependent element does not include the "source" or "target" element, creating a "action" element of the BPML corresponding to the element of the BPEL To BPML conversion method for executable business processes, including: The method of claim 1, The basic activity processing step, Determining whether an "empty" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "empty" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Creating an "empty" element of BPML corresponding to the "empty" element; And If the "empty" element does not include a "source" or "target" element as a dependent element, creating an "empty" element of BPML corresponding to the "empty" element To BPML conversion method for executable business processes, including: The method of claim 1, The basic activity processing step, Determining whether a "throw" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "throw" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Creating a “fault” element of BPML corresponding to the “throw” element; And If the "throw" element does not include a "source" or "target" element as a dependent element, creating a "fault" element of the BPML corresponding to the "throw" element To BPML conversion method for executable business processes, including: The method of claim 1, The basic activity processing step, Determining whether a "compensate" element that is an element of a BPEL includes a "source" or "target" element as a dependent element; If the "compensate" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating a “compensate” element of BPML corresponding to the “compensate” element; And If the "compensate" element of the BPEL does not include a "source" or "target" element as a dependent element, generating a "compensate" element of the BPML corresponding to the "compensate" element To BPML conversion method for executable business processes, including: The method of claim 1, The basic activity processing step, Determining whether an "assign" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "assign" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating an "assign" element of the corresponding BPML for each "copy" element that is a dependent element of the "assign" element; And If the "assign" element of the BPEL does not include a "source" or "target" element as a dependent element, generating an "assign" element of the BPML corresponding to the "assign" element To BPML conversion method for executable business processes, including: The method of claim 9, The basic activity processing step, Determining whether a "from" element that is a dependent element of the "assign" element of the BPEL has a "variable" attribute, an "expression" attribute, or a "literal text" attribute; Creating a "source" element as a dependent element of the "assign" element of the BPML when the "from" element has a "variable" attribute; And If the "from" element has an "expression" attribute or an "literal text" attribute, creating a "value" element as a dependent element of the "assign" element of the BPML BPEL to BPML conversion method for executable business process further comprising. The method of claim 1, The basic activity processing step, Determining whether a "wait" element, which is an element of BPEL, includes a "source" or "target" element as a dependent element; If the "wait" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating a "delay" element of BPML corresponding to the "wait" element; And If the "assign" element of the BPEL does not include a "source" or "target" element as a dependent element, creating a "delay" element of the BPML corresponding to the "wait" element To BPML conversion method for executable business processes, including: The method of claim 11, The main activity processing steps are: Determining whether the "wait" element of the BPEL has a "for" attribute or a "until" attribute; If the "wait" element has a "for" attribute, creating a "delay" element with a "duration" attribute; And If the "wait" element has an "until" attribute, creating a "delay" element with an "instant" attribute BPEL to BPML conversion method for executable business process further comprising. The method of claim 1, The execution environment processing step, Determining whether an element performing an activity for structuring various activities of the BPEL includes a "scope" element or a "link" element as a dependent element; And Creating a "context" element as a dependent element of the BPEL element if the BPEL element includes any of the "scope" element or the "link" element as a dependent element; Determining whether the dependent element of the BPEL element is a "link" element or a "scope" element; If the dependent element of the BPEL is a "link" element, creating a "signal" element representing the "link" element; If the dependent element of the BPEL is a "scope" element, executing the process creation step to process a "scope" element; Creating an element of a BPML corresponding to another element inside the BPEL element; And If the element of the BPEL does not include a "link" or "scope" element as a dependent element, creating an element of a BPML corresponding to another element inside the BPEL element To BPML conversion method for executable business processes, including: The method of claim 1, The structured activity processing step, Determining whether a "flow" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "flow" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating an “all” element of BPML corresponding to the “flow” element; And When the "flow" element of the BPEL does not include a "source" or "target" element as a dependent element, generating an "all" element of the BPML corresponding to the "flow" element; And Executing an execution environment processing step to process an execution environment of an activity inside the "flow" element To BPML conversion method for executable business processes, including: The method of claim 1, The structured activity processing step, Determining whether a "sequence" element that is an element of a BPEL includes a "source" or "target" element as a dependent element; If the "sequence" element of the BPEL includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating a “sequence” element of BPML corresponding to the “sequence” element of the BPEL; If the "sequence" element of the BPEL does not include a "source" or "target" element as a dependent element, generating a "sequence" element of the BPML corresponding to the "sequence" element of the BPEL; And Executing an execution environment processing step to process an execution environment of an activity inside the " sequence " of the BPEL. To BPML conversion method for executable business processes, including: The method of claim 1, The structured activity processing step, Determining whether a "while" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "while" element of the BPEL includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating a "while" element of the BPML corresponding to the "while" element of the BPEL; When the "while" element of the BPEL does not include a "source" or "target" element as a dependent element, generating a "while" element of the BPML corresponding to the "while" element of the BPEL; And Executing an execution environment processing step to process an execution environment of an activity inside the "while" of the BPEL; To BPML conversion method for executable business processes, including: The method of claim 1, The structured activity processing step, Determining whether a "scope" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "scope" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating a "call" element of the BPML corresponding to the "scope" element; And If the "scope" element does not include a "source" or "target" element as a dependent element, generating a "call" element of a BPML corresponding to the "scope" element; And Executing an execution environment processing step to process an execution environment of an activity inside the "scope" of the BPEL To BPML conversion method for executable business processes, including: The method of claim 1, The structured activity processing step, Determining whether a "switch" element that is an element of a BPEL includes a "source" or "target" element as a dependent element; If the "switch" element of the BPEL includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "sourece" or "target" element; Generating a "switch" element of the BPML corresponding to the "switch" element of the BPEL; And If the "switch" element of the BPEL does not include a "source" or "target" element as a dependent element, creating a "switch" element of the BPML corresponding to the "switch" element of the BPEL To BPML conversion method for executable business processes, including: The method of claim 18, The structured activity processing step, Determining whether the dependent element of the "switch" element of the BPEL is a "case" element or an "otherwise" element; Creating a "case" element as a dependent element of the BPML "switch" element when the dependent element of the "switch" element of the BPEL is a "case" element; Creating a "default" element as a dependent element of the BPML "switch" element when the dependent element of the "switch" element of the BPEL is an "otherwise" element; And Executing an execution environment processing step to process an execution environment of an activity within the "case" element or the "default" element BPEL to BPML conversion method for executable business process further comprising. The method of claim 1, The structured activity processing step, Determining whether a "pick" element that is an element of BPEL includes a "source" or "target" element as a dependent element; If the "pick" element includes a "source" or "target" element as a dependent element, executing the source / target processing step to process the "source" or "target" element; Creating a “choice” element of BPML corresponding to the “pick” element; And If the "pick" element does not include a "source" or "target" element as a dependent element, creating a "choice" element of the BPML corresponding to the "pick" element To BPML conversion method for executable business processes, including: The method of claim 20, The structured activity processing step, Determining whether the dependent element of the "pick" element is an "onMessage" element or an "onAlarm" element; If the dependent element of the "pick" element is an "onMessage" element, creating an "action" element as a dependent element of the "choice" element; Creating a "delay" element as a dependent element of the "choice" element when the dependent element of the "pick" element is an "onAlarm" element; And Executing an execution environment processing step to process an execution environment of an activity inside the "onMessage" element or an "onAlarm" element BPEL to BPML conversion method for executable business process further comprising. The method of claim 1, The process generation step, Creating a “process” element of BPML corresponding to a “scope” element that is an element of BPEL; And Creating a "context" element as a dependent element of the "process" element To BPML conversion method for executable business processes, including: The method of claim 22, The process generation step, When the "scope" element of the BPEL includes the "variables" element, a "property" element of the BPML corresponding to "variable", which is a dependent element of the "variables" element, is created as a dependent element of the "context" element. Steps to BPEL to BPML conversion method for executable business process further comprising. The method of claim 22, The process generation step If the "scope" element includes a "scope" element as a dependent element, executing the process creation step to process a "scope" element included as the dependent element BPEL to BPML conversion method for executable business process further comprising. The method of claim 22, The process generation step, If the "scope" element includes the "eventHandlers" element, determining whether the "eventHandlers" element includes a "onMessage" or "onAlarm" element as a dependent element; When the dependent element of the "eventHandlers" element is an "onMessage" element, generating an "exception" element of the BPML corresponding to the "eventHandlers" element as a dependent element of the "context" element; Generating an "event" element of a BPML corresponding to the "onMessage" element as a dependent element of the "exception" element; Generating a BPML element corresponding to an element inside "onMessage" as a dependent element of the "exception" element; Generating a "schedule" element of a BPML corresponding to the "eventHandlers" element as a dependent element of the "context" element when the dependent element of the "eventHandlers" element is an "onAlarm" element; And Creating a "faults" element of BPML and creating a "case" element with its dependent elements BPEL to BPML conversion method for executable business process further comprising. The method of claim 22, The process generation step, If the dependent element of the "scope" element is the "faultHandlers" element, determining whether the "faultHandlers" element includes a "catch" or "catchAll" element as a dependent element; If the dependent element of the "faultHandlers" element is a "catch" element, creating a "faults" element of BPML as a dependent element of the "context" element; Creating a "case" element as a dependent element of the "faults" element; If the dependent element of the "faultHandlers" element is a "catchAll" element, creating a "faults" element of BPML as a dependent element of the "context" element; And Creating a "default" element as a dependent element of the "faults" element BPEL to BPML conversion method for executable business process further comprising. The method of claim 22, When the dependent element of the "scope" element is the "compensationHandler" element, generating a "compensation" element of the BPML corresponding to the "compensationHandler" element as a dependent element of the "process" element BPEL to BPML conversion method for executable business process further comprising.

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