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Chapter 4. Runtime commands in Red Hat Decision Manager


Red Hat Decision Manager supports runtime commands that you can send to Decision 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 Decision Manager instance.

In the Decision 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 Decision Server REST API, see Chapter 1, Decision Server REST API for KIE containers and business assets.

In the Decision 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 Decision Server Java client API, see Chapter 2, Decision Server Java client API for KIE containers and business assets.

4.1. Sample runtime commands in Red Hat Decision Manager

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

  • BatchExecutionCommand
  • InsertObjectCommand
  • RetractCommand
  • ModifyCommand
  • GetObjectCommand
  • GetObjectsCommand
  • InsertElementsCommand
  • FireAllRulesCommand
  • QueryCommand
  • SetGlobalCommand
  • GetGlobalCommand

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

Each command in this section includes a REST request body example (JSON) for the Decision Server REST API and an embedded Java command example for the Decision 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
NameDescriptionRequirement

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 Decision 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"
      }
    }
  ]
}
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Example Java command

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

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

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

Inserts an object into the KIE session.

Table 4.2. Command attributes
NameDescriptionRequirement

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
      }
    }
  ]
}
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Example Java command

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

ksession.execute(insertObjectCommand);
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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"
            }
          ]
        }
      }
    }
  ]
}
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RetractCommand

Retracts an object from the KIE session.

Table 4.3. Command attributes
NameDescriptionRequirement

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"
      }
    }
  ]
}
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Example Java command: Use FactHandleFromString

RetractCommand retractCommand = new RetractCommand();
retractCommand.setFactHandleFromString("123:234:345:456:567");
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Example Java command: Use FactHandle from inserted object

RetractCommand retractCommand = new RetractCommand(factHandle);
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Example server response (JSON)

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

Modifies a previously inserted object in the KIE session.

Table 4.4. Command attributes
NameDescriptionRequirement

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
        }
      }
    }
  ]
}
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Example Java command

ModifyCommand modifyCommand = new ModifyCommand(factHandle);

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

modifyCommand.setSetters(setters);
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Example server response (JSON)

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

Retrieves an object from a KIE session.

Table 4.5. Command attributes
NameDescriptionRequirement

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"
      }
    }
  ]
}
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Example Java command

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

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

Retrieves all objects from the KIE session as a collection.

Table 4.6. Command attributes
NameDescriptionRequirement

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"
      }
    }
  ]
}
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Example Java command

GetObjectsCommand getObjectsCommand = new GetObjectsCommand();
getObjectsCommand.setOutIdentifier("objects");
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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": []
        }
      }
    }
  ]
}
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InsertElementsCommand

Inserts a list of objects into the KIE session.

Table 4.7. Command attributes
NameDescriptionRequirement

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"
                }
            }
        ]
    }
  }
]
}
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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);
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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"
            }
          ]
        }
      }
    }
  ]
}
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FireAllRulesCommand

Executes all rules in the KIE session.

Table 4.8. Command attributes
NameDescriptionRequirement

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"
    }
  } ]
}
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Example Java command

FireAllRulesCommand fireAllRulesCommand = new FireAllRulesCommand();
fireAllRulesCommand.setMax(10);
fireAllRulesCommand.setOutIdentifier("firedActivations");
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Example server response (JSON)

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

Executes a query defined in the KIE base.

Table 4.9. Command attributes
NameDescriptionRequirement

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"
      }
    }
  ]
}
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Example Java command

QueryCommand queryCommand = new QueryCommand();
queryCommand.setName("persons");
queryCommand.setOutIdentifier("persons");
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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": []
    }
  }
}
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SetGlobalCommand

Sets an object to a global state.

Table 4.10. Command attributes
NameDescriptionRequirement

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"
      }
    }
  ]
}
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Example Java command

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

Retrieves a previously defined global object.

Table 4.11. Command attributes
NameDescriptionRequirement

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"
      }
    }
  ]
}
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Example Java command

GetGlobalCommand getGlobalCommand = new GetGlobalCommand();
getGlobalCommand.setIdentifier("helper");
getGlobalCommand.setOutIdentifier("helperOutput");
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Example server response (JSON)

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