Chapter 4. Runtime commands in Red Hat Process Automation Manager

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Red Hat Process Automation Manager supports runtime commands that you can send to KIE Server for asset-related operations, such as executing all rules or inserting or retracting objects in a KIE session. The full list of supported runtime commands is located in the org.drools.core.command.runtime package in your Red Hat Process Automation Manager instance.

In the KIE Server REST API, you use the global org.drools.core.command.runtime commands or the rule-specific org.drools.core.command.runtime.rule commands as the request body for POST requests to http://SERVER:PORT/kie-server/services/rest/server/containers/instances/{containerId}. For more information about using the KIE Server REST API, see Chapter 1, KIE Server REST API for KIE containers and business assets.

In the KIE Server Java client API, you can embed these commands in your Java application along with the relevant Java client. For example, for rule-related commands, you use the RuleServicesClient Java client with the embedded commands. For more information about using the KIE Server Java client API, see Chapter 2, KIE Server Java client API for KIE containers and business assets.

4.1. Sample runtime commands in Red Hat Process Automation Manager

The following are sample runtime commands that you can use with the KIE Server REST API or Java client API for asset-related operations in KIE Server:

BatchExecutionCommand
InsertObjectCommand
RetractCommand
ModifyCommand
GetObjectCommand
GetObjectsCommand
InsertElementsCommand
FireAllRulesCommand
StartProcessCommand
SignalEventCommand
CompleteWorkItemCommand
AbortWorkItemCommand
QueryCommand
SetGlobalCommand
GetGlobalCommand

For the full list of supported runtime commands, see the org.drools.core.command.runtime package in your Red Hat Process Automation Manager instance.

Each command in this section includes a REST request body example (JSON) for the KIE Server REST API and an embedded Java command example for the KIE Server Java client API. The Java examples use an object org.drools.compiler.test.Person with the fields name (String) and age (Integer).

BatchExecutionCommand

Contains multiple commands to be executed together.

Table 4.1. Command attributes
Name	Description	Requirement
`commands`	List of commands to be executed.	Required
`lookup`	Sets the KIE session ID on which the commands will be executed. For stateless KIE sessions, this attribute is required. For stateful KIE sessions, this attribute is optional and if not specified, the default KIE session is used.	Required for stateless KIE session, optional for stateful KIE session

Note

KIE session IDs are in the kmodule.xml file of your Red Hat Process Automation Manager project. To view or add a KIE session ID in Business Central to use with the lookup command attribute, navigate to the relevant project in Business Central and go to project Settings KIE bases KIE sessions. If no KIE bases exist, click Add KIE base KIE sessions to define the new KIE base and KIE sessions.

Example JSON request body

{
  "lookup": "ksession1",
  "commands": [ {
      "insert": {
        "object": {
          "org.drools.compiler.test.Person": {
            "name": "john",
            "age": 25
          }
        }
      }
    },
    {
      "fire-all-rules": {
        "max": 10,
        "out-identifier": "firedActivations"
      }
    }
  ]
}

Example Java command

InsertObjectCommand insertCommand = new InsertObjectCommand(new Person("john", 25));
FireAllRulesCommand fireCommand = new FireAllRulesCommand();

BatchExecutionCommand batch = new BatchExecutionCommandImpl(Arrays.asList(insertCommand, fireCommand), "ksession1");

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [
            {
              "value": 0,
              "key": "firedActivations"
            }
          ],
          "facts": []
        }
      }
    }
  ]
}

InsertObjectCommand

Inserts an object into the KIE session.

Table 4.2. Command attributes
Name	Description	Requirement
`object`	The object to be inserted	Required
`out-identifier`	ID of the `FactHandle` created from the object insertion and added to the execution results	Optional
`return-object`	Boolean to determine whether the object must be returned in the execution results (default: `true`)	Optional
`entry-point`	Entry point for the insertion	Optional

Example JSON request body

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

Example Java command

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

ksession.execute(insertObjectCommand);

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [],
          "facts": [
            {
              "value": {
                "org.drools.core.common.DefaultFactHandle": {
                  "external-form": "0:4:436792766:-2127720265:4:DEFAULT:NON_TRAIT:java.util.LinkedHashMap"
                }
              },
              "key": "john"
            }
          ]
        }
      }
    }
  ]
}

RetractCommand

Retracts an object from the KIE session.

Table 4.3. Command attributes
Name	Description	Requirement
`fact-handle`	The `FactHandle` associated with the object to be retracted	Required

Example JSON request body

{
  "commands": [ {
      "retract": {
        "fact-handle": "0:4:436792766:-2127720265:4:DEFAULT:NON_TRAIT:java.util.LinkedHashMap"
      }
    }
  ]
}

Example Java command: Use FactHandleFromString

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

Example Java command: Use FactHandle from inserted object

RetractCommand retractCommand = new RetractCommand(factHandle);

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container employee-rostering successfully called.",
      "result": {
        "execution-results": {
          "results": [],
          "facts": []
        }
      }
    }
  ]
}

ModifyCommand

Modifies a previously inserted object in the KIE session.

Table 4.4. Command attributes
Name	Description	Requirement
`fact-handle`	The `FactHandle` associated with the object to be modified	Required
`setters`	List of setters for object modifications	Required

Example JSON request body

{
  "commands": [ {
      "modify": {
        "fact-handle": "0:4:436792766:-2127720265:4:DEFAULT:NON_TRAIT:java.util.LinkedHashMap",
        "setters": {
          "accessor": "age",
          "value": 25
        }
      }
    }
  ]
}

Example Java command

ModifyCommand modifyCommand = new ModifyCommand(factHandle);

List<Setter> setters = new ArrayList<Setter>();
setters.add(new SetterImpl("age", "25"));

modifyCommand.setSetters(setters);

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container employee-rostering successfully called.",
      "result": {
        "execution-results": {
          "results": [],
          "facts": []
        }
      }
    }
  ]
}

GetObjectCommand

Retrieves an object from a KIE session.

Table 4.5. Command attributes
Name	Description	Requirement
`fact-handle`	The `FactHandle` associated with the object to be retrieved	Required
`out-identifier`	ID of the `FactHandle` created from the object insertion and added to the execution results	Optional

Example JSON request body

{
  "commands": [ {
      "get-object": {
        "fact-handle": "0:4:436792766:-2127720265:4:DEFAULT:NON_TRAIT:java.util.LinkedHashMap",
        "out-identifier": "john"
      }
    }
  ]
}

Example Java command

GetObjectCommand getObjectCommand = new GetObjectCommand();
getObjectCommand.setFactHandleFromString("123:234:345:456:567");
getObjectCommand.setOutIdentifier("john");

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [
            {
              "value": null,
              "key": "john"
            }
          ],
          "facts": []
        }
      }
    }
  ]
}

GetObjectsCommand

Retrieves all objects from the KIE session as a collection.

Table 4.6. Command attributes
Name	Description	Requirement
`object-filter`	Filter for the objects returned from the KIE session	Optional
`out-identifier`	Identifier to be used in the execution results	Optional

Example JSON request body

{
  "commands": [ {
      "get-objects": {
        "out-identifier": "objects"
      }
    }
  ]
}

Example Java command

GetObjectsCommand getObjectsCommand = new GetObjectsCommand();
getObjectsCommand.setOutIdentifier("objects");

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [
            {
              "value": [
                {
                  "org.apache.xerces.dom.ElementNSImpl": "<?xml version=\"1.0\" encoding=\"UTF-16\"?>\n<object xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:type=\"person\"><age>25</age><name>john</name>\n <\/object>"
                },
                {
                  "org.drools.compiler.test.Person": {
                    "name": "john",
                    "age": 25
                  }
                }
              ],
              "key": "objects"
            }
          ],
          "facts": []
        }
      }
    }
  ]
}

InsertElementsCommand

Inserts a list of objects into the KIE session.

Table 4.7. Command attributes
Name	Description	Requirement
`objects`	The list of objects to be inserted into the KIE session	Required
`out-identifier`	ID of the `FactHandle` created from the object insertion and added to the execution results	Optional
`return-object`	Boolean to determine whether the object must be returned in the execution results. Default value: `true`.	Optional
`entry-point`	Entry point for the insertion	Optional

Example JSON request body

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

Example Java command

List<Object> objects = new ArrayList<Object>();
objects.add(new Person("john", 25));
objects.add(new Person("sarah", 35));

Command insertElementsCommand = CommandFactory.newInsertElements(objects);

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [],
          "facts": [
            {
              "value": {
                "org.drools.core.common.DefaultFactHandle": {
                  "external-form": "0:4:436792766:-2127720265:4:DEFAULT:NON_TRAIT:java.util.LinkedHashMap"
                }
              },
              "key": "john"
            },
            {
              "value": {
                "org.drools.core.common.DefaultFactHandle": {
                  "external-form": "0:4:436792766:-2127720266:4:DEFAULT:NON_TRAIT:java.util.LinkedHashMap"
                }
              },
              "key": "sarah"
            }
          ]
        }
      }
    }
  ]
}

FireAllRulesCommand

Executes all rules in the KIE session.

Table 4.8. Command attributes
Name	Description	Requirement
`max`	Maximum number of rules to be executed. The default is `-1` and does not put any restriction on execution.	Optional
`out-identifier`	ID to be used for retrieving the number of fired rules in execution results.	Optional
`agenda-filter`	Agenda Filter to be used for rule execution.	Optional

Example JSON request body

{
  "commands" : [ {
    "fire-all-rules": {
        "max": 10,
        "out-identifier": "firedActivations"
    }
  } ]
}

Example Java command

FireAllRulesCommand fireAllRulesCommand = new FireAllRulesCommand();
fireAllRulesCommand.setMax(10);
fireAllRulesCommand.setOutIdentifier("firedActivations");

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [
            {
              "value": 0,
              "key": "firedActivations"
            }
          ],
          "facts": []
        }
      }
    }
  ]
}

StartProcessCommand

Starts a process using the process ID. You can also pass parameters and initial data to be inserted.

Table 4.9. Command attributes
Name	Description	Requirement
`processId`	ID of the process to be started	Required
`parameters`	A `Map <String,Object>` argument to pass parameters in the process startup	Optional
`data`	List of objects to be inserted into the KIE session before the process startup	Optional

Example JSON request body

{
  "commands": [
    {
      "start-process": {
        "processId": "myProject.myProcess",
        "data": null,
        "parameter": [],
        "out-identifier": null
      }
    }
  ]
}

Example Java command

StartProcessCommand startProcessCommand = new StartProcessCommand();
startProcessCommand.setProcessId("org.drools.task.processOne");

Example server response (JSON)

{
  "type": "SUCCESS",
  "msg": "Container stateful-session successfully called.",
  "result": {
    "execution-results": {
      "results": [],
      "facts": []
    }
  }
}

SignalEventCommand

Sends a signal event to the KIE session.

Table 4.10. Command attributes
Name	Description	Requirement
`event-type`	Type of the incoming event	Required
`process-instance-id`	ID of the process instance to be signalled	Optional
`event`	Data of the incoming event	Optional

Example JSON request body

{
  "commands": [
    {
      "signal-event": {
        "process-instance-id": 1001,
        "correlation-key": null,
        "event-type": "start",
        "event": {
          "org.kie.server.testing.Person": {
            "fullname": "john",
            "age": 25
          }
        }
      }
    }
  ]
}

Example Java command

SignalEventCommand signalEventCommand = new SignalEventCommand();
signalEventCommand.setProcessInstanceId(1001);
signalEventCommand.setEventType("start");
signalEventCommand.setEvent(new Person("john", 25));

Example server response (JSON)

{
  "type": "SUCCESS",
  "msg": "Container stateful-session successfully called.",
  "result": {
    "execution-results": {
      "results": [],
      "facts": []
    }
  }
}

CompleteWorkItemCommand

Completes a work item in the KIE session.

Table 4.11. Command attributes
Name	Description	Requirement
`workItemId`	ID of the work item to be completed	Required
`results`	Result of the work item	Optional

Example JSON request body

{
  "commands": [ {
    "complete-work-item": {
        "id": 1001
    }
  }
]
}

Example Java command

CompleteWorkItemCommand completeWorkItemCommand = new CompleteWorkItemCommand();
completeWorkItemCommand.setWorkItemId(1001);

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container employee-rostering successfully called.",
      "result": {
        "execution-results": {
          "results": [],
          "facts": []
        }
      }
    }
  ]
}

AbortWorkItemCommand

Aborts a work item in the KIE session in the same way as ksession.getWorkItemManager().abortWorkItem(workItemId).

Table 4.12. Command attributes
Name	Description	Requirement
`workItemId`	ID of the work item to be aborted	Required

Example JSON request body

{
  "commands": [ {
      "abort-work-item": {
        "id": 1001
      }
    }
  ]
}

Example Java command

AbortWorkItemCommand abortWorkItemCommand = new AbortWorkItemCommand();
abortWorkItemCommand.setWorkItemId(1001);

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container employee-rostering successfully called.",
      "result": {
        "execution-results": {
          "results": [],
          "facts": []
        }
      }
    }
  ]
}

QueryCommand

Executes a query defined in the KIE base.

Table 4.13. Command attributes
Name	Description	Requirement
`name`	Query name.	Required
`out-identifier`	ID of the query results. The query results are added in the execution results with this identifier.	Optional
`arguments`	List of objects to be passed as a query parameter.	Optional

Example JSON request body

{
  "commands": [
    {
      "query": {
        "name": "persons",
        "arguments": [],
        "out-identifier": "persons"
      }
    }
  ]
}

Example Java command

QueryCommand queryCommand = new QueryCommand();
queryCommand.setName("persons");
queryCommand.setOutIdentifier("persons");

Example server response (JSON)

{
  "type": "SUCCESS",
  "msg": "Container stateful-session successfully called.",
  "result": {
    "execution-results": {
      "results": [
        {
          "value": {
            "org.drools.core.runtime.rule.impl.FlatQueryResults": {
              "idFactHandleMaps": {
                "type": "LIST",
                "componentType": null,
                "element": [
                  {
                    "type": "MAP",
                    "componentType": null,
                    "element": [
                      {
                        "value": {
                          "org.drools.core.common.DisconnectedFactHandle": {
                            "id": 1,
                            "identityHashCode": 1809949690,
                            "objectHashCode": 1809949690,
                            "recency": 1,
                            "object": {
                              "org.kie.server.testing.Person": {
                                "fullname": "John Doe",
                                "age": 47
                              }
                            },
                            "entryPointId": "DEFAULT",
                            "traitType": "NON_TRAIT",
                            "external-form": "0:1:1809949690:1809949690:1:DEFAULT:NON_TRAIT:org.kie.server.testing.Person"
                          }
                        },
                        "key": "$person"
                      }
                    ]
                  }
                ]
              },
              "idResultMaps": {
                "type": "LIST",
                "componentType": null,
                "element": [
                  {
                    "type": "MAP",
                    "componentType": null,
                    "element": [
                      {
                        "value": {
                          "org.kie.server.testing.Person": {
                            "fullname": "John Doe",
                            "age": 47
                          }
                        },
                        "key": "$person"
                      }
                    ]
                  }
                ]
              },
              "identifiers": {
                "type": "SET",
                "componentType": null,
                "element": [
                  "$person"
                ]
              }
            }
          },
          "key": "persons"
        }
      ],
      "facts": []
    }
  }
}

SetGlobalCommand

Sets an object to a global state.

Table 4.14. Command attributes
Name	Description	Requirement
`identifier`	ID of the global variable defined in the KIE base	Required
`object`	Object to be set into the global variable	Optional
`out`	Boolean to exclude the global variable you set from the execution results	Optional
`out-identifier`	ID of the global execution result	Optional

Example JSON request body

{
  "commands": [
    {
      "set-global": {
        "identifier": "helper",
        "object": {
          "org.kie.server.testing.Person": {
            "fullname": "kyle",
            "age": 30
          }
        },
        "out-identifier": "output"
      }
    }
  ]
}

Example Java command

SetGlobalCommand setGlobalCommand = new SetGlobalCommand();
setGlobalCommand.setIdentifier("helper");
setGlobalCommand.setObject(new Person("kyle", 30));
setGlobalCommand.setOut(true);
setGlobalCommand.setOutIdentifier("output");

Example server response (JSON)

{
  "type": "SUCCESS",
  "msg": "Container stateful-session successfully called.",
  "result": {
    "execution-results": {
      "results": [
        {
          "value": {
            "org.kie.server.testing.Person": {
              "fullname": "kyle",
              "age": 30
            }
          },
          "key": "output"
        }
      ],
      "facts": []
    }
  }
}

GetGlobalCommand

Retrieves a previously defined global object.

Table 4.15. Command attributes
Name	Description	Requirement
`identifier`	ID of the global variable defined in the KIE base	Required
`out-identifier`	ID to be used in the execution results	Optional

Example JSON request body

{
  "commands": [ {
      "get-global": {
        "identifier": "helper",
        "out-identifier": "helperOutput"
      }
    }
  ]
}

Example Java command

GetGlobalCommand getGlobalCommand = new GetGlobalCommand();
getGlobalCommand.setIdentifier("helper");
getGlobalCommand.setOutIdentifier("helperOutput");

Example server response (JSON)

{
  "response": [
    {
      "type": "SUCCESS",
      "msg": "Container command-script-container successfully called.",
      "result": {
        "execution-results": {
          "results": [
            {
              "value": null,
              "key": "helperOutput"
            }
          ],
          "facts": []
        }
      }
    }
  ]
}

Chapter 4. Runtime commands in Red Hat Process Automation Manager

4.1. Sample runtime commands in Red Hat Process Automation Manager

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