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9.16. Batch-execution and Command Examples

  1. There is currently no XML schema to support schema validation. This is the basic format. The root element is <batch-execution> and it can contain zero or more commands elements: 
    <batch-execution>
...
</batch-execution>
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  2. The insert element features an "out-identifier" attribute so the inserted object will be returned as part of the result payload: 
    <batch-execution>
   <insert out-identifier='userVar'>
      ...
   </insert>
</batch-execution>
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  3. It's also possible to insert a collection of objects using the <insert-elements> element. This command does not support an out-identifier. The org.domain.UserClass is just an illustrative user object that XStream would serialize: 
    <batch-execution>
   <insert-elements>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
   </insert-elements>
</batch-execution>
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  4. The <set-global> element sets a global for the session: 
    <batch-execution>
   <set-global identifier='userVar'>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
   </set-global>
</batch-execution>
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  5. <set-global> also supports two other optional attributes: out and out-identifier. A true value for the boolean out will add the global to the <batch-execution-results> payload, using the name from the identifier attribute. out-identifier works like out but additionally allows you to override the identifier used in the <batch-execution-results> payload: 
    <batch-execution>
   <set-global identifier='userVar1' out='true'>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
   </set-global>
   <set-global identifier='userVar2' out-identifier='alternativeUserVar2'>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
   </set-global>
</batch-execution>
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  6. There is a <get-global> element without contents. It only has an out-identifier attribute. There is no need for an out attribute because retrieving the value is the sole purpose of a <get-global> element: 
    <batch-execution>
   <get-global identifier='userVar1' />
   <get-global identifier='userVar2' out-identifier='alternativeUserVar2'/>
</batch-execution>
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  7. The query command supports both parameter and parameterless queries. The name attribute is the name of the query to be called, and the out-identifier is the identifier to be used for the query results in the <execution-results> payload: 
    <batch-execution>
   <query out-identifier='cars' name='cars'/>
   <query out-identifier='cars2' name='carsWithParams'>
      <string>red</string>
      <string>blue</string>
   </query>
</batch-execution>
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  8. The <start-process> command accepts optional parameters: 
    <batch-execution>
   <startProcess processId='org.drools.actions'>
      <parameter identifier='person'>
         <org.drools.TestVariable>
            <name>John Doe</name>
         </org.drools.TestVariable>
      </parameter>
   </startProcess>
</batch-execution
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  9. The signal event command allows you to identify processes: 
    <signal-event process-instance-id='1' event-type='MyEvent'>
   <string>MyValue</string>
</signal-event>
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  10. The complete work item command notifies users when a process is completed: 
    <complete-work-item id='" + workItem.getId() + "' >
   <result identifier='Result'>
      <string>SomeOtherString</string>
   </result>
</complete-work-item>
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  11. The abort work item command lets you cancel a process while it is running: 
    <abort-work-item id='21' />
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