KR101859285B1 - iPOJO framework and workflow system - Google Patents

Abstract

An injected Plain Old Java Object (iPOJO) framework and workflow system are disclosed. The iPOJO framework part includes an engine part for interpreting the first description and composting services; And a workflow handler for converting a second description for interaction or control between the services to correspond to the first description and injecting the second description to the engine unit.

Description

iPOJO (injected Plain Old Java Object) framework and workflow system {iPOJO framework and workflow system}

The present invention relates to an iPOJO framework and a workflow system capable of processing workflow-based services in an iPOJO (injected Plain Old Java Object) framework.

Generally, a service composition is divided into a behavioral service composition and a structural service composition.

A behavioral service composition is able to interact with other services by adding behavior of the service, that is, control semantics at each stage of the processor. On the other hand, a structural service composition has a description for a composite service definition, and the framework handles exemplification, binding, and composite execution.

The iPOJO framework is a structural service composition model and has disadvantages of not being flexible because it does not support ordered interaction or control between services.

The present invention is to provide an iPOJO framework and a workflow system that can support interaction and control between services in an iPOJO framework.

To this end, the present invention is to provide an iPOJO framework and a workflow system capable of processing workflow-based services by further defining a composition using a workflow handler in the iPOJO framework.

According to an aspect of the present invention, there is provided an iPOJO framework and a workflow system capable of supporting interaction and control between services in an iPOJO framework.

According to an embodiment of the present invention, there is provided a workflow system comprising: a Java virtual machine unit; An iPOJO framework (an injected Plain Old Java Object framework) operating on the Java virtual machine platform and interpreting the first description to compose services; And a workflow handler for converting a second description for interaction or control between the services to correspond to the first description and injecting the converted work description to the iPOJO framework part.

The workflow handler may convert the second description into metadata with iPOJO bundles and inject the metadata into the iPOJO framework part.

The workflow handler may analyze some of the elements included in the second description to generate an event message for interaction or control between services and transmit the generated event message to the application terminal.

The first description and the second description are written in different languages.

The second description serving as a top-level descriptor indicating that the second description is a description supporting a workflow-based composition; A second element for describing a service instance of the workflow composition process; A third element for describing at least one service operating in a composite application; A fourth element for describing a process type for interaction or control of said services; And a fifth element for describing the variables required by the third element.

Wherein the workflow handler receives a reconfiguration instruction for reconfiguration of a service for a service configuration failure or an unavailable service in the course of composition of the services from the iPOJO framework part, To the iPOJO framework section.

According to another embodiment of the present invention, there is provided a workflow system comprising: a Java virtual machine unit; And an iPOJO framework (an injected Plain Old Java Object framework) operating on the Java virtual machine platform, for composing services using a workflow description and for handling events on interaction and control between the services A flow system can be provided.

According to another embodiment of the present invention, there is provided an information processing apparatus comprising: an engine unit for interpreting a first description and composting services; And a workflow handler for converting a second description for interaction or control between the services so as to correspond to the first description and injecting the same into the engine unit.

A reconfiguration unit for creating a reconfiguration instruction for re-composition of a service in a service configuration failure state or an unavailable state in the composition of the services from the iPOJO framework unit.

The workflow handler may modify some of the second descriptions according to the reconfiguration instructions, and may inject the iPOJO framework part into the iPOJO framework part.

The iPOJO framework can be executed on a Java virtual machine.

The workflow handler may generate an event message for interaction or control between services by analyzing a part of the elements included in the second description and transmit the event message to an application terminal.

And a service storage unit for registering the services composed by the engine unit.

By providing the iPOJO framework and the workflow system according to the embodiment of the present invention, there is an advantage that the iPOJO framework can support the interaction and control between the respective services.

In addition, the present invention is capable of processing workflow-based services by additionally defining a composition using a workflow handler in the iPOJO framework, and as a result, there is an advantage that the iPOJO framework can be flexibly extended.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically illustrates a configuration of a workflow system according to an embodiment of the present invention; FIG.
Figure 2 illustrates an example of a structured service composition description according to an embodiment of the present invention.
Figure 3 illustrates a service composition according to the implementation of the description according to Figure 2;
4 illustrates an example of a workflow description according to an embodiment of the present invention.
Figure 5 illustrates the main elements of a workflow description in accordance with an embodiment of the present invention.
FIG. 6 illustrates an example of an iCDL metamodel description according to an embodiment of the present invention; FIG.
Figure 7 illustrates a workflow handler-based architecture in accordance with one embodiment of the present invention.
8 is a block diagram schematically illustrating an internal structure of an iPOJO framework according to an embodiment of the present invention;

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In this specification, the terms "comprising ", or" comprising "and the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating an example of a structural service composition description according to an exemplary embodiment of the present invention. FIG. 3 is a block diagram illustrating a configuration of a workflow system according to an exemplary embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a workflow description according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating an example of a service composition according to an embodiment of the present invention FIG. 6 is a diagram illustrating an example of an iCDL metamodel description according to an embodiment of the present invention, and FIG. 7 is a diagram illustrating an example of a workflow description according to an exemplary embodiment of the present invention. Flow handler-based architecture.

A workflow system according to an embodiment of the present invention is implemented in a hardware stage that includes a memory and a processor. Hereinafter, since the main points of the present invention may be blurred, description of a hardware stage such as a memory and a processor will be omitted, and a workflow system operating on an upper stage of a hardware stage will be mainly described.

Thus, although not explicitly described below, the workflow system should be understood as a configuration that runs on the processor of the computing device.

Referring to FIG. 1, a workflow system 100 according to an embodiment of the present invention is operated on a Java virtual machine unit 110. It is a matter of course that such Java virtual machine unit 110 can be operated on a processor.

The iPOJO framework part 115 is operated on the Java virtual machine part 110. The iPOJO framework unit 115 extracts each service by analyzing a structural composition description (hereinafter, referred to as a first description) in which a service composition is defined, binds or unbinds each service according to the binding policy, It functions as a composition.

The first description may include a description of at least one service instance for composition of each service with a service composition description.

Accordingly, the iPOJO framework part 115 extracts each service instance to analyze the first description and construct a corresponding service, binds or unbinds each service instance according to a binding policy, can do.

The service composed by the iPOJO framework part 115 can be registered in a service registry.

In addition, in the service composition process, the iPOJO framework part 115 may provide a rebalance instruction for rebalancing a composition for a service composition failure or a service in an unavailable state. The service composition can be adjusted by modifying the first description according to the reordering instructions.

In Figure 2, a first description for a particular service composition is illustrated. FIG. 3 shows an example in which the service composition description of FIG. 2 is executed in the iPOJO framework part 115.

The conventional iPOJO framework part 115 only supports the first description (i.e., the service composition description). Accordingly, the conventional iPOJO framework unit 115 does not dynamically support the interaction between services or event processing according to the control.

Accordingly, in the embodiment of the present invention, the second description (workflow description) for the interaction between the services and the event processing according to the control is newly defined in the iPOJO framework part 115.

FIG. 4 shows an example of a workflow description. In Figure 5, the main elements of the newly added workflow description are summarized.

In order to facilitate understanding and explanation, each element of the newly added (defined) workflow description will be briefly described with reference to FIG.

The structural composition description (ie, the first description) was based on BPEL, while the workflow description (the second description) was based on iCDL.

Therefore, an iCDL element (hereinafter referred to as a first element) is included at the top of the description so that the description is a description written in the iCDL. The first element acts as a top-level descriptor indicating that the description is a description supporting a workflow-based composition.

The first element is a second element, which includes a < process > element.

The second element is a descriptor for describing the service instance of the workflow composition process.

The second element includes a third element, a fourth element and a fifth element.

Here, the third element is a < partnerService > element, which includes at least one service corresponding to the composite application.

The fourth element is a < subprocess > element that contains a description of the process type for interaction or control between services. Here, the process type may be, for example, a sequence, a flow, an assign, and the like.

The fifth element is a <variables> element, which contains a description for the variables required by the third element (i.e., <partnerService>).

An example of a workflow description is shown in Fig.

1, the iPOJO framework part 115 executes on the Java virtual machine part 110 and receives a first description (i.e., a service composition description) and a second description (workflow description) And support the application to operate.

As already mentioned above, the workflow description (i.e., the second description) according to an embodiment of the present invention is written in a language different from the service composition description. Therefore, in order to handle the workflow description (i.e., the second description) in the iPOJO framework part 115, interworking with the workflow handler 120 is required.

The workflow handler 120 is a means for converting and injecting a second description (workflow description) to be executable in the iPOJO framework part 115 for interaction or control between services.

For example, the workflow handler 120 may wrap the second description in an iPOJO bundle using metadata and convert the second description to be available for processing in the iPOJO framework part 115. [

The workflow handler 120 can perform an intermediate role between the iPOJO framework part 115 and the application terminal 125 for analyzing the workflow description and processing events for interaction or control among the respective services.

To this end, the workflow handler 120 receives a reconcile instruction for a service composition failure or an unavailable state as a result of the service composition of the workflow description (second description) converted from the iPOJO framework part 115 to the iPOJO bundle Can be provided.

This centralized architecture of workflow handler 120 is illustrated in FIG.

For example, since the workflow handler 120 does not directly configure each service using the workflow description (second description), the workflow handler 120 can store the information on the service configuration based on the workflow description From the iPOJO framework part 115 and receives a result report for re-adjusting the service composition for a service configuration failure or an unavailable state, and may receive an instruction accordingly to re-adjust the workflow description .

The workflow handler 120 may be provided in the iPOJO framework part 115 in a single configuration or may have a separate configuration interlocked with the iPOJO framework part 115.

8 is a block diagram schematically illustrating an internal structure of an iPOJO framework according to an embodiment of the present invention.

Such an iPOJO framework may be stored in a memory and operated on a processor, as already described above in Fig. In addition, the processor is equipped with a Java virtual machine, and the iPOJO framework can be executed on the Java virtual machine.

8, an iPOJO framework 800 according to an embodiment of the present invention includes an engine unit 810, a reconciliation unit 815, a service storage unit 820, and a workflow handler 825, do.

The engine unit 810 is means for analyzing the first description and the second description to compose the service. The engine unit 810 extracts a service instance by analyzing each element included in the first description and the second description, and then performs a function to compose a service by binding or unbinding a service according to the service instance according to a binding policy do.

The service compiled by the engine unit 810 is registered in the service storage unit 820.

Reconciliation unit 815 receives a result report from engine unit 810 to recalibrate the service composition for the service configuration failure or unavailable state by engine unit 810 and sends the rebalance instruction to workflow handler 825 .

Accordingly, the workflow handler 825 can modify the workflow description according to the re-ordering instruction and deliver it to the engine unit 810 to re-adjust the service composition. Accordingly, the engine unit 810 can readjust the service composition.

The workflow handler 825 is a means for converting and injecting a workflow description (second description) for interaction or control between services so as to be executable in the iPOJO framework. Accordingly, the engine unit 810 can compose the service using the workflow description modified by the iPOJO bundle.

In addition, the workflow handler 120 may analyze the workflow description (second description), and may forward event processing for interactions between services and control to the application terminal 125. [

On the other hand, the components of the above-described embodiment can be easily grasped from a process viewpoint. That is, each component can be identified as a respective process. Further, the process of the above-described embodiment can be easily grasped from the viewpoint of the components of the apparatus.

In addition, the above-described technical features may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the following claims.

100: Workflow system
110: Java Virtual Machine Part
115: iPOJO Framework part
120: Workflow handler
125: Application stage

Claims (14)

In a workflow system,
Java virtual machine part;
An iPOJO framework (an injected Plain Old Java Object framework) operating on the Java virtual machine platform and interpreting the first description to compose services; And
And a workflow handler for converting a second description for interaction or control between the services to correspond to the first description and injecting the converted second description into the iPOJO framework part,
Wherein the second description comprises:
A first element serving as a top-level descriptor indicating that the second description is a description supporting a workflow-based composition;
A second element for describing a service instance of the workflow composition process;
A third element for describing at least one service operating in a composite application;
A fourth element for describing a process type for interaction or control of said services; And
And a fifth element for describing the variables required by the third element.
The method according to claim 1,
The workflow handler includes:
Converts the second description into metadata with iPOJO bundles, and injects the meta data into the iPOJO framework part.
The method according to claim 1,
Wherein the workflow handler analyzes part of the elements included in the second description to generate an event message for interaction or control between services and transmits the generated event message to an application terminal.
The method according to claim 1,
Wherein the first description and the second description are written in different languages, respectively.
delete The method according to claim 1,
The workflow handler includes:
Receiving a re-arrangement instruction for re-composition of a service in a service configuration failure state or an unavailable state in the process of composing the services from the iPOJO framework section, and modifying a part of the second description according to the re- And injects the workpiece into the work part.
An engine unit for interpreting the first description and composting the services; And
And a workflow handler for converting a second description for interaction or control between the services to correspond to the first description and injecting the converted description to the engine unit,
Wherein the second description comprises:
A first element serving as a top-level descriptor indicating that the second description is a description supporting a workflow-based composition;
A second element for describing a service instance of the workflow composition process;
A third element for describing at least one service operating in a composite application;
A fourth element for describing a process type for interaction or control of said services; And
And a fifth element for describing the variables required by the third element.
8. The method of claim 7,
Further comprising a re-configuration unit for generating a re-configuration instruction for re-composition of a service in a service configuration failure or an unavailable state in the process of composing the services from the engine unit.
9. The method of claim 8,
The workflow handler includes:
And corrects a part of the second description according to the re-ordering instruction, and injects the corrected second description to the engine unit.
8. The method of claim 7,
Wherein the iPOJO framework apparatus is executed on a Java virtual machine.
8. The method of claim 7,
The workflow handler includes:
And analyzing a part of the elements included in the second description to generate an event message for interaction or control between services and transmit the generated event message to an application terminal.
8. The method of claim 7,
And a service storage unit for registering the services compiled by the engine unit.
In a workflow system,
Java virtual machine part; And
An iPOJO framework (an injected Plain Old Java Object framework) operating on the Java virtual machine platform and configured to compose services using the first description and to process events for interaction and control between the services,
The iPOJO framework part,
And a workflow handler for converting a second description for interaction or control between services to correspond to the first description,
Wherein the second description comprises:
A first element serving as a top-level descriptor indicating that the second description is a description supporting a workflow-based composition;
A second element for describing a service instance of the workflow composition process;
A third element for describing at least one service operating in a composite application;
A fourth element for describing a process type for interaction or control of said services; And
And a fifth element for describing the variables required by the third element.

delete

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