ForEachForkActionHandler

sobigring

于 2011-02-11 17:28:35 发布

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分类专栏： JBPM 文章标签： Java JBoss JBPM

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本文介绍JBPM 3.0中ForEachForkActionHandler的使用方法，通过一个具体示例展示如何处理列表变量并实现并行任务执行。

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http://community.jboss.org/wiki/ForEachForkActionHandler

ForEachForkActionHandler implements pattern 14, Multiple Instances with Run Time Knowledge. This is a Jbpm 3.0 port of the Jbpm 2.0 JbpmCustomForkhandler.

Example Usage: The calling code would set variable assets with a java.lang.List.

<process-definition name="foreachfork-example">
    <start-state name="start">
        <transition to="foreachfork" ></transition>
    </start-state>
    <node name="foreachfork">
        <action class="com.xxx.workflow.ForEachForkActionHandler" config-type="bean">
            <listVariable>assets</listVariable>
            <as>asset</as>
        </action>
        <transition name="one" to="one"></transition>
        <transition name="two" to="two"></transition>
    </node>
    <node name="one">
        <script>
                System.out.println("one: " + asset);
        </script>
        <transition to="joinforeach"></transition>
    </node>
    <node name="two">
        <script>
                System.out.println("two: " + asset);
        </script>
        <transition to="joinforeach"></transition>
    </node>
    <join name="joinforeach">
        <transition to="end"></transition>
    </join>
    <end-state name="end"></end-state>
</process-definition>

Note: The example file below uses some of the deprecated API. With 3.1.1, instead of executionContext.getProcessInstance().getJbpmSession().getSession().save(newToken);
use
executionContext.getJbpmContext().getSession().save(newToken);