Examples of org.jbpm.pvm.Execution

org.jbpm.pvm.Execution
a runtime path of execution.
State of an execution

The state of an execution is either active or locked. An active execution is either executing or waiting for an external trigger. If an execution is not in {@link #STATE_ACTIVE}, then it is locked. A locked execution is read only.

When a new execution is created, it is in {@link #STATE_ACTIVE}. To change the state to a locked state, use {@link #lock(String)}. {@link #STATE_ACTIVE Some STATE_* constants} are provided that represent the most commonly used locked states. But the state '...' in the picture indicates that any string can be provided as the state in the lock method.

If an execution is locked, methods that change the execution will throw a {@link PvmException} and the message will reference the actual locking state.{@link #fire(String,ObservableElement) Firing events}, {@link #setVariable(String,Object) updating variables}, {@link #setPriority(int) updating priority} and {@link #addComment(String) adding comments} are not considered to change an execution. Also {@link #createExecution(String) creation} and {@link #removeExecution(Execution) removal} of child executions are unchecked, which means that those methods can be invoked by external API clients and node behaviour methods, even while the execution is in a locked state.

Make sure that comparisons between {@link #getState()} and the {@link #STATE_ACTIVE STATE_* constants} are done with .equals and not with '==' because if executions are loaded from persistent storage, a new string is created instead of the constants.

Comments
@author Tom Baeyens

        .node("a").initial().behaviour(new WaitState())
          .transition().to("b")
        .node("b").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();
    execution.signal();
  }

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          .node("2").behaviour(new WaitState())
          .node("two").behaviour(new Display("two"))
        .compositeEnd()
    .done();


    Execution execution = processDefinition.startExecution();
    execution.signal();
    assertTrue(execution.isEnded());
    assertEquals("sequence", execution.getNode().getName());
  }

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        .node("a").behaviour(new WaitState())
        .node("b").behaviour(new WaitState())
        .node("c").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();
    execution.setVariable("creditRate", 13);
    execution.signal();
    assertEquals("a", execution.getNode().getName());


    execution = processDefinition.startExecution();
    execution.setVariable("creditRate", 2);
    execution.signal();
    assertEquals("b", execution.getNode().getName());


    execution = processDefinition.startExecution();
    execution.setVariable("creditRate", -13);
    execution.signal();
    assertEquals("c", execution.getNode().getName());
  }

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        .compositeEnd()
    .done();
    
    Map<String, Object> variables = new HashMap<String, Object>();
    variables.put("creditRate", 13);
    Execution execution = processDefinition.startExecution(variables);
    assertEquals("good", execution.getNode().getName());


    variables = new HashMap<String, Object>();
    variables.put("creditRate", 2);
    execution = processDefinition.startExecution(variables);
    assertEquals("average", execution.getNode().getName());


    variables = new HashMap<String, Object>();
    variables.put("creditRate", -18);
    execution = processDefinition.startExecution(variables);
    assertEquals("bad", execution.getNode().getName());
  }

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        .node("a").initial().behaviour(new Display("hello"))
          .transition().to("b")
        .node("b").behaviour(new Display("world"))
    .done();
    
    Execution execution = processDefinition.startExecution();
    assertEquals("b", execution.getNode().getName());
    assertTrue(execution.isEnded());
  }

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        .node("automatic 4").behaviour(new Display("four"))
          .transition().to("wait 3")
        .node("wait 3").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();
    assertEquals("wait 1", execution.getNode().getName());
    execution.signal();
    assertEquals("wait 2", execution.getNode().getName());
    execution.signal();
    assertEquals("wait 3", execution.getNode().getName());
  }

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        .node("shred evidence").behaviour(new TaskActivity())
          .transition().to("next")
        .node("next").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();


    assertEquals("shred evidence", execution.getNode().getName());


    Task task = TaskService.getTaskList("johndoe").get(0);
    task.complete();
    
    assertEquals("next", execution.getNode().getName());
  }

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            .transition().to("c")
        .compositeEnd()
        .node("c").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();
    execution.signal();
    execution.signal();
  }

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        .node("a").behaviour(new WaitState())
        .node("b").behaviour(new WaitState())
        .node("c").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();
    execution.signal();
    assertEquals("creditRate?", execution.getNode().getName());
    execution.signal("good");
    assertEquals("a", execution.getNode().getName());


    execution = processDefinition.startExecution();
    execution.signal();
    execution.signal("average");
    assertEquals("b", execution.getNode().getName());


    execution = processDefinition.startExecution();
    execution.signal();
    execution.signal("bad");
    assertEquals("c", execution.getNode().getName());
  }

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            .transition().to("c")
        .compositeEnd()
        .node("c").behaviour(new WaitState())
    .done();
    
    Execution execution = processDefinition.startExecution();
    execution.signal();
    execution.signal();
  }

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Related Classes of org.jbpm.pvm.Execution

org.jbpm.client.AbstractCommand

org.jbpm.client.GetVariable

org.jbpm.client.GetVariables

org.jbpm.client.SetVariables

org.jbpm.client.Signal

org.jbpm.examples.ch02._01_DisplayActivityTest

org.jbpm.examples.ch02._02_WaitStateExternalActivityTest

org.jbpm.examples.ch02._03_BasicGraphExecutionText

org.jbpm.examples.ch02._04_EventTest

org.jbpm.examples.ch02._05_EventPropagationTest

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Examples of org.jbpm.pvm.Execution

State of an execution

Comments

Related Classes of org.jbpm.pvm.Execution