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## Chapter 4. Drools Commands

## 4.1. API

XML marshalling/unmarshalling of the Drools Commands requires the use of special classes, which are going to be described in the following sections.

The following urls show sample script examples for jaxb, xstream and json marshalling using:

- http://fisheye.jboss.org/browse/JBossRules/trunk/drools-camel/src/test/resources/org/drools/camel/component/jaxb.mvt?r=HEAD

- http://fisheye.jboss.org/browse/JBossRules/trunk/drools-camel/src/test/resources/org/drools/camel/component/jaxb.mvt?r=HEAD

- http://fisheye.jboss.org/browse/JBossRules/trunk/drools-camel/src/test/resources/org/drools/camel/component/xstream.mvt?r=HEAD

### 4.1.1. XStream

To use the XStream commands marshaller you need to use the DroolsHelperProvider to obtain an XStream instance. We need to use this because it has the commands converters registered.

- Marshalling

  BatchExecutionHelperProviderImpl.newXStreamMarshaller().toXML(command);

- Unmarshalling

  BatchExecutionHelperProviderImpl.newXStreamMarshaller().fromXML(xml)

### 4.1.2. JSON

JSON API to marshalling/unmarshalling is similar to XStream API:

- Marshalling

  BatchExecutionHelper.newJSonMarshaller().toXML(command);

- Unmarshalling

  BatchExecutionHelper.newJSonMarshaller().fromXML(xml)

### 4.1.3. JAXB

There are two options for using JAXB, you can define your model in an XSD file or you can have a POJO model. In both cases you have to declare your model inside JAXBContext, and in order to do that you need to use Drools Helper classes. Once you have the JAXBContext you need to create the Unmarshaller/Marshaller as needed.

#### 4.1.3.1. Using an XSD file to define the model

With your model defined in a XSD file you need to have a KnowledgeBase that has your XSD model added as a resource.

To do this, the XSD file must be added as a XSD ResourceType into the KnowledgeBuilder. Finally you can create the JAXBContext using the KnowledgeBase created with the KnowledgeBuilder

    Options xjcOpts = new Options();

    xjcOpts.setSchemaLanguage(Language.XMLSCHEMA);

    JaxbConfiguration jaxbConfiguration = KnowledgeBuilderFactory.newJaxbConfiguration( xjcOpts, "xsd" );

    kbuilder.add(ResourceFactory.newClassPathResource("person.xsd", getClass()), ResourceType.XSD, jaxbConfiguration);

    KnowledgeBase kbase = kbuilder.newKnowledgeBase();

    List<String> classesName = new ArrayList<String>();

    classesName.add("org.drools.compiler.test.Person");

    JAXBContext jaxbContext = KnowledgeBuilderHelper.newJAXBContext(classesName.toArray(new String[classesName.size()]), kbase);

#### 4.1.3.2. Using a POJO model

In this case you need to use DroolsJaxbHelperProviderImpl to create the JAXBContext. This class has two parameters:

1. classNames: A List with the canonical name of the classes that you want to use in the marshalling/unmarshalling process.

2. properties: JAXB custom properties

    List<String> classNames = new ArrayList<String>();

    classNames.add("org.drools.compiler.test.Person");

    JAXBContext jaxbContext = DroolsJaxbHelperProviderImpl.createDroolsJaxbContext(classNames, null);

    Marshaller marshaller = jaxbContext.createMarshaller();

## 4.2. Commands supported

Currently, the following commands are supported:

- BatchExecutionCommand

- InsertObjectCommand

- RetractCommand

- ModifyCommand

- GetObjectCommand

- InsertElementsCommand

- FireAllRulesCommand

- StartProcessCommand

- SignalEventCommand

- CompleteWorkItemCommand

- AbortWorkItemCommand

- QueryCommand

- SetGlobalCommand

- GetGlobalCommand

- GetObjectsCommand

## Note

In the next snippets code we are going to use a POJO org.drools.compiler.test.Person that has two fields

- name: String

- age: Integer

## Note

In the next examples, to marshall the commands we have used the next snippet codes:

- XStream

      String xml = BatchExecutionHelper.newXStreamMarshaller().toXML(command);

- JSON

      String xml = BatchExecutionHelper.newJSonMarshaller().toXML(command);

- JAXB

      Marshaller marshaller = jaxbContext.createMarshaller();

      StringWriter xml = new StringWriter();

      marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

      marshaller.marshal(command, xml);

### 4.2.1. BatchExecutionCommand

- Description: The command that contains a list of commands, which will be sent and executed.

- Attributes

  Table 4.1. BatchExecutionCommand attributes

  Name | Description | required
  --- | --- | ---
  lookup | Sets the knowledge session id on which the commands are going to be executed | true
  commands | List of commands to be executed | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      InsertObjectCommand insertObjectCommand = new InsertObjectCommand(new Person("john", 25));

      FireAllRulesCommand fireAllRulesCommand = new FireAllRulesCommand();

      command.getCommands().add(insertObjectCommand);

      command.getCommands().add(fireAllRulesCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <insert>

            <org.drools.compiler.test.Person>

              <name>john</name>

              <age>25</age>

            </org.drools.compiler.test.Person>

          </insert>

          <fire-all-rules/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":[{"insert":{"object":{"org.drools.compiler.test.Person":{"name":"john","age":25}}}},{"fire-all-rules":""}]}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <insert>

                <object xsi:type="person" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

                    <age>25</age>

                    <name>john</name>

                </object>

            </insert>

            <fire-all-rules max="-1"/>

        </batch-execution>

### 4.2.2. InsertObjectCommand

- Description: Insert an object in the knowledge session.

- Attributes

  Table 4.2. InsertObjectCommand attributes

  Name | Description | required
  --- | --- | ---
  object | The object to be inserted | true
  outIdentifier | Id to identify the FactHandle created in the object insertion and added to the execution results | false
  returnObject | Boolean to establish if the object must be returned in the execution results. Default value: true | false
  entryPoint | Entrypoint for the insertion | false

- Command creation

      List<Command> cmds = ArrayList<Command>();

      Command insertObjectCommand = CommandFactory.newInsert(new Person("john", 25), "john", false, null);

      cmds.add( insertObjectCommand );

      BatchExecutionCommand command = CommandFactory.createBatchExecution(cmds, "ksession1" );

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <insert out-identifier="john" entry-point="my stream" return-object="false">

            <org.drools.compiler.test.Person>

              <name>john</name>

              <age>25</age>

            </org.drools.compiler.test.Person>

          </insert>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"insert":{"entry-point":"my stream", "out-identifier":"john","return-object":false,"object":{"org.drools.compiler.test.Person":{"name":"john","age":25}}}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <insert out-identifier="john" entry-point="my stream" >

                <object xsi:type="person" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

                    <age>25</age>

                    <name>john</name>

                </object>

            </insert>

        </batch-execution>

### 4.2.3. RetractCommand

- Description: Retract an object from the knowledge session.

- Attributes

  Table 4.3. RetractCommand attributes

  Name | Description | required
  --- | --- | ---
  handle | The FactHandle associated to the object to be retracted | true

- Command creation: we have two options, with the same output result:

  1. Create the Fact Handle from a string

         BatchExecutionCommand command = new BatchExecutionCommand();

         command.setLookup("ksession1");

         RetractCommand retractCommand = new RetractCommand();

         retractCommand.setFactHandleFromString("123:234:345:456:567");

         command.getCommands().add(retractCommand);

  2. Set the Fact Handle that you received when the object was inserted

         BatchExecutionCommand command = new BatchExecutionCommand();

         command.setLookup("ksession1");

         RetractCommand retractCommand = new RetractCommand(factHandle);

         command.getCommands().add(retractCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <retract fact-handle="0:234:345:456:567"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"retract":{"fact-handle":"0:234:345:456:567"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <retract fact-handle="0:234:345:456:567"/>

        </batch-execution>

### 4.2.4. ModifyCommand

- Description: Allows you to modify a previously inserted object in the knowledge session.

- Attributes

  Table 4.4. ModifyCommand attributes

  Name | Description | required
  --- | --- | ---
  handle | The FactHandle associated to the object to be retracted | true
  setters | List of setters object's modifications | true

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      ModifyCommand modifyCommand = new ModifyCommand();

      modifyCommand.setFactHandleFromString("123:234:345:456:567");

      List<Setter> setters = new ArrayList<Setter>();

      setters.add(new SetterImpl("age", "30"));

      modifyCommand.setSetters(setters);

      command.getCommands().add(modifyCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <modify fact-handle="0:234:345:456:567">

            <set accessor="age" value="30"/>

          </modify>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"modify":{"fact-handle":"0:234:345:456:567","setters":{"accessor":"age","value":30}}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <modify fact-handle="0:234:345:456:567">

                <set value="30" accessor="age"/>

            </modify>

        </batch-execution>

### 4.2.5. GetObjectCommand

- Description: Used to get an object from a knowledge session

- Attributes

  Table 4.5. GetObjectCommand attributes

  Name | Description | required
  --- | --- | ---
  factHandle | The FactHandle associated to the object to be retracted | true
  outIdentifier | Id to identify the FactHandle created in the object insertion and added to the execution results | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      GetObjectCommand getObjectCommand = new GetObjectCommand();

      getObjectCommand.setFactHandleFromString("123:234:345:456:567");

      getObjectCommand.setOutIdentifier("john");

      command.getCommands().add(getObjectCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <get-object fact-handle="0:234:345:456:567" out-identifier="john"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"get-object":{"fact-handle":"0:234:345:456:567","out-identifier":"john"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <get-object out-identifier="john" fact-handle="0:234:345:456:567"/>

        </batch-execution>

### 4.2.6. InsertElementsCommand

- Description: Used to insert a list of objects.

- Attributes

  Table 4.6. InsertElementsCommand attributes

  Name | Description | required
  --- | --- | ---
  objects | The list of objects to be inserted on the knowledge session | true
  outIdentifier | Id to identify the FactHandle created in the object insertion and added to the execution results | false
  returnObject | Boolean to establish if the object must be returned in the execution results. Default value: true | false
  entryPoint | Entrypoint for the insertion | false

- Command creation

      List<Command> cmds = ArrayList<Command>();

      List<Object> objects = new ArrayList<Object>();

      objects.add(new Person("john", 25));

      objects.add(new Person("sarah", 35));

      Command insertElementsCommand = CommandFactory.newInsertElements( objects );

      cmds.add( insertElementsCommand );

      BatchExecutionCommand command = CommandFactory.createBatchExecution(cmds, "ksession1" );

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <insert-elements>

            <org.drools.compiler.test.Person>

              <name>john</name>

              <age>25</age>

            </org.drools.compiler.test.Person>

            <org.drools.compiler.test.Person>

              <name>sarah</name>

              <age>35</age>

            </org.drools.compiler.test.Person>

          </insert-elements>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"insert-elements":{"objects":[{"containedObject":{"@class":"org.drools.compiler.test.Person","name":"john","age":25}},{"containedObject":{"@class":"Person","name":"sarah","age":35}}]}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <insert-elements return-objects="true">

                <list>

                    <element xsi:type="person" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

                        <age>25</age>

                        <name>john</name>

                    </element>

                    <element xsi:type="person" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

                        <age>35</age>

                        <name>sarah</name>

                    </element>

                <list>

            </insert-elements>

        </batch-execution>

### 4.2.7. FireAllRulesCommand

- Description: Allow execution of the rules activations created.

- Attributes

  Table 4.7. FireAllRulesCommand attributes

  Name | Description | required
  --- | --- | ---
  max | The max number of rules activations to be executed. default is -1 and will not put any restriction on execution | false
  outIdentifier | Add the number of rules activations fired on the execution results | false
  agendaFilter | Allow the rules execution using an Agenda Filter | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      FireAllRulesCommand fireAllRulesCommand = new FireAllRulesCommand();

      fireAllRulesCommand.setMax(10);

      fireAllRulesCommand.setOutIdentifier("firedActivations");

      command.getCommands().add(fireAllRulesCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <fire-all-rules max="10" out-identifier="firedActivations"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"fire-all-rules":{"max":10,"out-identifier":"firedActivations"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

           <fire-all-rules out-identifier="firedActivations" max="10"/>

        </batch-execution>

### 4.2.8. StartProcessCommand

- Description: Allows you to start a process using the ID. Also you can pass parameters and initial data to be inserted.

- Attributes

  Table 4.8. StartProcessCommand attributes

  Name | Description | required
  --- | --- | ---
  processId | The ID of the process to be started | true
  parameters | A Map<String, Object> to pass parameters in the process startup | false
  data | A list of objects to be inserted in the knowledge session before the process startup | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      StartProcessCommand startProcessCommand = new StartProcessCommand();

      startProcessCommand.setProcessId("org.drools.task.processOne");

      command.getCommands().add(startProcessCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <start-process processId="org.drools.task.processOne"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"start-process":{"process-id":"org.drools.task.processOne"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <start-process processId="org.drools.task.processOne">

                <parameter/>

            </start-process>

        </batch-execution>

### 4.2.9. SignalEventCommand

- Description: Send a signal event.

- Attributes

  Table 4.9. SignalEventCommand attributes

  Name | Description | required
  --- | --- | ---
  event-type |  | true
  processInstanceId |  | false
  event |  | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      SignalEventCommand signalEventCommand = new SignalEventCommand();

      signalEventCommand.setProcessInstanceId(1001);

      signalEventCommand.setEventType("start");

      signalEventCommand.setEvent(new Person("john", 25));

      command.getCommands().add(signalEventCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <signal-event process-instance-id="1001" event-type="start">

            <org.drools.pipeline.camel.Person>

              <name>john</name>

              <age>25</age>

            </org.drools.pipeline.camel.Person>

          </signal-event>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"signal-event":{"process-instance-id":1001,"@event-type":"start","event-type":"start","object":{"org.drools.pipeline.camel.Person":{"name":"john","age":25}}}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <signal-event event-type="start" process-instance-id="1001">

                <event xsi:type="person" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

                    <age>25</age>

                    <name>john</name>

                </event>

            </signal-event>

        </batch-execution>

### 4.2.10. CompleteWorkItemCommand

- Description: Allows you to complete a WorkItem.

- Attributes

  Table 4.10. CompleteWorkItemCommand attributes

  Name | Description | required
  --- | --- | ---
  workItemId | The ID of the WorkItem to be completed | true
  results |  | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      CompleteWorkItemCommand completeWorkItemCommand = new CompleteWorkItemCommand();

      completeWorkItemCommand.setWorkItemId(1001);

      command.getCommands().add(completeWorkItemCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <complete-work-item id="1001"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"complete-work-item":{"id":1001}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <complete-work-item id="1001"/>

        </batch-execution>

### 4.2.11. AbortWorkItemCommand

- Description: Allows you abort an WorkItem. The same as session.getWorkItemManager().abortWorkItem(workItemId)

- Attributes

  Table 4.11. AbortWorkItemCommand attributes

  Name | Description | required
  --- | --- | ---
  workItemId | The ID of the WorkItem to be completed | true

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      AbortWorkItemCommand abortWorkItemCommand = new AbortWorkItemCommand();

      abortWorkItemCommand.setWorkItemId(1001);

      command.getCommands().add(abortWorkItemCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <abort-work-item id="1001"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"abort-work-item":{"id":1001}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <abort-work-item id="1001"/>

        </batch-execution>

### 4.2.12. QueryCommand

- Description: Executes a query defined in knowledge base.

- Attributes

  Table 4.12. QueryCommand attributes

  Name | Description | required
  --- | --- | ---
  name | The query name | true
  outIdentifier | The identifier of the query results. The query results are going to be added in the execution results with this identifier | false
  arguments | A list of objects to be passed as a query parameter | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      QueryCommand queryCommand = new QueryCommand();

      queryCommand.setName("persons");

      queryCommand.setOutIdentifier("persons");

      command.getCommands().add(queryCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <query out-identifier="persons" name="persons"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"query":{"out-identifier":"persons","name":"persons"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <query name="persons" out-identifier="persons"/>

        </batch-execution>

### 4.2.13. SetGlobalCommand

- Description: Allows you to set a global.

- Attributes

  Table 4.13. SetGlobalCommand attributes

  Name | Description | required
  --- | --- | ---
  identifier | The identifier of the global defined in the knowledge base | true
  object | The object to be set into the global | false
  out | A boolean to add, or not, the set global result into the execution results | false
  outIdentifier | The identifier of the global execution result | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      SetGlobalCommand setGlobalCommand = new SetGlobalCommand();

      setGlobalCommand.setIdentifier("helper");

      setGlobalCommand.setObject(new Person("kyle", 30));

      setGlobalCommand.setOut(true);

      setGlobalCommand.setOutIdentifier("output");

      command.getCommands().add(setGlobalCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <set-global identifier="helper" out-identifier="output">

            <org.drools.compiler.test.Person>

              <name>kyle</name>

              <age>30</age>

            </org.drools.compiler.test.Person>

          </set-global>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"set-global":{"identifier":"helper","out-identifier":"output","object":{"org.drools.compiler.test.Person":{"name":"kyle","age":30}}}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <set-global out="true" out-identifier="output" identifier="helper">

                <object xsi:type="person" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

                    <age>30</age>

                    <name>kyle</name>

                </object>

            </set-global>

        </batch-execution>

### 4.2.14. GetGlobalCommand

- Description: Allows you to get a global previously defined.

- Attributes

  Table 4.14. GetGlobalCommand attributes

  Name | Description | required
  --- | --- | ---
  identifier | The identifier of the global defined in the knowledge base | true
  outIdentifier | The identifier to be used in the execution results | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      GetGlobalCommand getGlobalCommand = new GetGlobalCommand();

      getGlobalCommand.setIdentifier("helper");

      getGlobalCommand.setOutIdentifier("helperOutput");

      command.getCommands().add(getGlobalCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <get-global identifier="helper" out-identifier="helperOutput"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"get-global":{"identifier":"helper","out-identifier":"helperOutput"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <get-global out-identifier="helperOutput" identifier="helper"/>

        </batch-execution>

### 4.2.15. GetObjectsCommand

- Description: Returns all the objects from the current session as a Collection.

- Attributes

  Table 4.15. GetObjectsCommand attributes

  Name | Description | required
  --- | --- | ---
  objectFilter | An ObjectFilter to filter the objects returned from the current session | false
  outIdentifier | The identifier to be used in the execution results | false

- Command creation

      BatchExecutionCommand command = new BatchExecutionCommand();

      command.setLookup("ksession1");

      GetObjectsCommand getObjectsCommand = new GetObjectsCommand();

      getObjectsCommand.setOutIdentifier("objects");

      command.getCommands().add(getObjectsCommand);

- XML output

  - XStream

        <batch-execution lookup="ksession1">

          <get-objects out-identifier="objects"/>

        </batch-execution>

  - JSON

        {"batch-execution":{"lookup":"ksession1","commands":{"get-objects":{"out-identifier":"objects"}}}}

  - JAXB

        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>

        <batch-execution lookup="ksession1">

            <get-objects out-identifier="objects"/>

        </batch-execution>

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