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JBoss Rules 5 Reference Guide
9.16. Batch-execution and Command Examples

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9.16. Batch-execution and Command Examples

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>
```
```
<batch-execution>
...
</batch-execution>
```
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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>

<batch-execution>
   <insert out-identifier='userVar'>
      ...
   </insert>
</batch-execution>

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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>

<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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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>

<batch-execution>
   <set-global identifier='userVar'>
      <org.domain.UserClass>
         ...
      </org.domain.UserClass>
   </set-global>
</batch-execution>

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<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>

<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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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>

<batch-execution>
   <get-global identifier='userVar1' />
   <get-global identifier='userVar2' out-identifier='alternativeUserVar2'/>
</batch-execution>

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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>

<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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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

<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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The signal event command allows you to identify processes:

<signal-event process-instance-id='1' event-type='MyEvent'>
   <string>MyValue</string>
</signal-event>

<signal-event process-instance-id='1' event-type='MyEvent'>
   <string>MyValue</string>
</signal-event>

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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>

<complete-work-item id='" + workItem.getId() + "' >
   <result identifier='Result'>
      <string>SomeOtherString</string>
   </result>
</complete-work-item>

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The abort work item command lets you cancel a process while it is running:
```
<abort-work-item id='21' />
```
```
<abort-work-item id='21' />
```
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9.16. Batch-execution and Command Examples

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