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https://issues.apache.org/jira/browse/SCXML-117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rahul Akolkar resolved SCXML-117.
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Resolution: Won't Fix
Many of the above are reasonable suggestions. However, these don't really
belong to the core library and there aren't any imminent plans for such a
supporting module.
If we have such code available at some point, we can revisit whether it can be
included and how it may be packaged.
> A multi-thread supported service and custom action management system for
> Apache Commons SCXML engine
> ----------------------------------------------------------------------------------------------------
>
> Key: SCXML-117
> URL: https://issues.apache.org/jira/browse/SCXML-117
> Project: Commons SCXML
> Issue Type: New Feature
> Environment: Java environment
> Reporter: Gui Xunlong
> Original Estimate: 1344h
> Remaining Estimate: 1344h
>
> Abstract:
>
> Apache Commons SCXML is an implementation aimed at creating and maintaining a
> Java SCXML engine capable of executing a state machine defined using a SCXML
> document which is very useful to handler complex status transfer logic.This
> project aims to implement a multi-thread supported service and custom action
> management system for Commons SCXML.
>
> Description:
>
> State Chart XML (SCXML) provides a generic state-machine based execution
> environment based on Harel State Tables and is very useful to handler complex
> status transfer logic.Apache Commons SCXML is an implementation aimed at
> creating and maintaining a Java SCXML engine capable of executing a state
> machine defined using a SCXML document. It is just a single thread SCXML
> engine,if user want to implement a whole SCXML based application, he must do
> some secondary development jobs.
> This project aims to develop a open source multi-thread SCXML services
> management system. It includes these main function module,and this is also
> what i need to do:
>
> 1.Custom actions management module
> All the system custom actions are registered in a configuration xml named
> system_custom_actions.xml.
> Each custom action Java Class must implement interface
> org.apache.commons.scxml.model.Action, and write practical code in function
> execute(final EventDispatcher evtDispatcher, final ErrorReporter errRep,
> final SCInstance scInstance, final Log appLog, final Collection
> derivedEvents)
> When system initializate, load all the custom actions Class from
> system_custom_actions.xml,instance them and add them into system context
> environment.User can use this mechanism to add his own custom actions to the
> system
> Create a Java Swing based Graphics User Interface to add,modify,delete custom
> actions into the system.
>
> 2.Thread pool management module
> Use a thread pool mechanism to manage SCXML engines. The thread pool
> properties information is stored in a XML confiuration file named
> system_thread_pool.xml,it includes these attributes:
> min_thead_number,max_thread_number,thread_release_timespan may be some more
> When system initializate, it will instance several SCXML engines objects
> according to min_thread_number. If these thread are all busy, but one new
> service is start,system will start a new thread to handle this service. The
> thead number can not outstrip max_thread_number. If a thread has been free
> for a period of time which is marked by attribute
> thread_release_timespan,system will release this thread.
>
> 3.Service management module
> Every application service is a SCXML document,all the system services are
> registered in a configuration xml file named system_service.xml, each service
> has a unique id which is used to mark the service.
>
> 4.Service manage and monitor module
> Build a Java Swing GUI to check service list,start,stop,deploy or delete some
> services.And also, it has a sub system to monitor running service status,look
> over data in running context,reset this service or kill it.
> 5.Event dispatch module
> Implement a EventDispather class instance to send Event to the system. Each
> Event will contain a service id which is used to mark its owner service and
> specific event content.
>
> This is a whole SCXML deploy and management system. If user want to implement
> some SCXML based application, just write proper SCXML document and
> corresponding custom actions,register them in to the system,and start the
> service,it is done.
> I think it is a practical SCXML engine,it will make Apache Commons SCXML more
> and more popular,In fact, i have finish some function module, such as custom
> action management module.
> I think this is a proper project for GSoC under Apache Commons SCXML, but i
> have not a mentor yet, any one interested in it, please contact
> ustbco...@gmail.com
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