Examples of org.jbpm.context.exe.ContextInstance

org.jbpm.context.exe.ContextInstance
Maintains all the key-variable pairs for a process instance. You can obtain a ContextInstance from a processInstance from a process instance like this :
```
 ProcessInstance processInstance = ...; ContextInstance contextInstance = processInstance.getContextInstance(); 
```

      "</process-definition>"
    );
    processDefinition = saveAndReload(processDefinition);


    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    ContextInstance contextInstance = processInstance.getContextInstance();
    TaskMgmtInstance taskMgmtInstance = processInstance.getTaskMgmtInstance();
    processInstance.signal();
    TaskInstance taskInstance = (TaskInstance) taskMgmtInstance.getTaskInstances().iterator().next();


    jbpmContext.save(processInstance);
    
    newTransaction();
    
    processInstance = jbpmContext.loadProcessInstance(processInstance.getId());
    taskInstance = jbpmContext.loadTaskInstance(taskInstance.getId());
    contextInstance = processInstance.getContextInstance();
    taskMgmtInstance = processInstance.getTaskMgmtInstance();


    HashMap expectedVariables = new HashMap();
    assertEquals(expectedVariables, taskInstance.getVariables());
    assertFalse(taskInstance.hasVariable("a"));
    assertNull(taskInstance.getVariable("a"));
    assertNull(contextInstance.getVariable("a"));
    
    taskInstance.setVariableLocally("a", "1");
    
    jbpmContext.save(taskInstance);


    newTransaction();
    
    processInstance = jbpmContext.loadProcessInstance(processInstance.getId());
    taskInstance = jbpmContext.loadTaskInstance(taskInstance.getId());
    contextInstance = processInstance.getContextInstance();
    taskMgmtInstance = processInstance.getTaskMgmtInstance();


    expectedVariables.put("a", "1");
    assertEquals(expectedVariables, taskInstance.getVariables());


    assertTrue(taskInstance.hasVariable("a"));
    assertEquals("1", taskInstance.getVariable("a"));
    assertNull(contextInstance.getVariable("a"));
  }

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      "</process-definition>"
    );
    processDefinition = saveAndReload(processDefinition);


    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    ContextInstance contextInstance = processInstance.getContextInstance();
    TaskMgmtInstance taskMgmtInstance = processInstance.getTaskMgmtInstance();
    
    contextInstance.setVariable("a", "1");
    contextInstance.setVariable("b", "2");
    contextInstance.setVariable("c", "3");
    
    processInstance.signal();
    TaskInstance taskInstance = (TaskInstance) taskMgmtInstance.getTaskInstances().iterator().next();


    jbpmContext.save(processInstance);
    
    newTransaction();
    
    processInstance = jbpmContext.loadProcessInstance(processInstance.getId());
    taskInstance = jbpmContext.loadTaskInstance(taskInstance.getId());
    contextInstance = processInstance.getContextInstance();
    taskMgmtInstance = processInstance.getTaskMgmtInstance();


    HashMap expectedVariables = new HashMap();
    expectedVariables.put("a", "1");
    expectedVariables.put("b", "2");
    expectedVariables.put("c", "3");
    assertEquals(expectedVariables, taskInstance.getVariables());
    
    taskInstance.setVariable("a", "1 modified");
    taskInstance.setVariable("b", "2 modified");
    taskInstance.setVariable("c", "3 modified");
    
    jbpmContext.save(processInstance);


    newTransaction();
    
    processInstance = jbpmContext.loadProcessInstance(processInstance.getId());
    taskInstance = jbpmContext.loadTaskInstance(taskInstance.getId());
    contextInstance = processInstance.getContextInstance();
    taskMgmtInstance = processInstance.getTaskMgmtInstance();


    expectedVariables = new HashMap();
    expectedVariables.put("a", "1 modified");
    expectedVariables.put("b", "2 modified");
    expectedVariables.put("c", "3 modified");
    assertEquals(expectedVariables, taskInstance.getVariables());


    newTransaction();
    
    processInstance = jbpmContext.loadProcessInstance(processInstance.getId());
    taskInstance = jbpmContext.loadTaskInstance(taskInstance.getId());
    contextInstance = processInstance.getContextInstance();
    taskMgmtInstance = processInstance.getTaskMgmtInstance();


    expectedVariables = new HashMap();
    expectedVariables.put("a", "1"); // task instance had local copy for var a
    expectedVariables.put("b", "2"); // task instance had local copy for var b
    expectedVariables.put("c", "3 modified");
    assertEquals(expectedVariables, contextInstance.getVariables());
  }

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    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    processInstance.signal();
    Token tokenA = processInstance.findToken("/a");
    Token tokenB = processInstance.findToken("/b");
    
    ContextInstance contextInstance = processInstance.getContextInstance();
    contextInstance.setVariable("r", "rrrrrr");
    contextInstance.createVariable("a", "aaaaaa", tokenA);
    contextInstance.createVariable("b", "bbbbbb", tokenB);
    
    processInstance = saveAndReload(processInstance);
    
    graphSession.deleteProcessInstance(processInstance);

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      "</process-definition>"
    );
    processDefinition.addDefinition(new ContextDefinition());
    
    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    ContextInstance contextInstance = processInstance.getContextInstance();
    contextInstance.setVariable("number", new Float(5.5));
    contextInstance.setVariable("text", "one of the few");
    processInstance.signal();
    
    LoggingInstance loggingInstance = processInstance.getLoggingInstance();
    loggingInstance.logLogs();
  }

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public class ActionExpressionDbTest extends AbstractDbTestCase {
  
  public static class MyActionObject implements Serializable {
    private static final long serialVersionUID = 1L;
    public void gettingStarted() {
      ContextInstance contextInstance = ExecutionContext.currentExecutionContext().getContextInstance();
      contextInstance.setVariable("getting started", "done");
    }

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    public void gettingStarted() {
      ContextInstance contextInstance = ExecutionContext.currentExecutionContext().getContextInstance();
      contextInstance.setVariable("getting started", "done");
    }
    public void halfWayThere() {
      ContextInstance contextInstance = ExecutionContext.currentExecutionContext().getContextInstance();
      contextInstance.setVariable("half way there", "done");
    }

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    public void halfWayThere() {
      ContextInstance contextInstance = ExecutionContext.currentExecutionContext().getContextInstance();
      contextInstance.setVariable("half way there", "done");
    }
    public void concluding() {
      ContextInstance contextInstance = ExecutionContext.currentExecutionContext().getContextInstance();
      contextInstance.setVariable("concluding", "done");
    }

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      "</process-definition>"
    );
    processDefinition.addDefinition(new ContextDefinition());


    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    ContextInstance contextInstance = (ContextInstance) processInstance.getInstance(ContextInstance.class);
    contextInstance.setVariable("b", new Integer(3));
    contextInstance.setVariable("c", new Integer(9));
    processInstance.signal();


    assertEquals(new Integer(12), contextInstance.getVariable("a"));
  }

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  public void testExecute() {
    ProcessDefinition processDefinition = ProcessDefinition.createNewProcessDefinition();
    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    Token token = processInstance.getRootToken();
    ExecutionContext executionContext = new ExecutionContext(token);
    ContextInstance contextInstance = executionContext.getContextInstance();
    contextInstance.setVariable("a", new Integer(1));
    contextInstance.setVariable("b", new Integer(1));
    
    Script script = new Script();
    script.addVariableAccess(new VariableAccess("a", "read,write", null));
                                                // b is READ-ONLY ! 
    script.addVariableAccess(new VariableAccess("b", "read", null));
    script.addVariableAccess(new VariableAccess("c", "write", null));
    script.setExpression(
      "if (a!=1) throw new RuntimeException(\"a is not 1\");" +
      "if (b!=1) throw new RuntimeException(\"b is not 1\");" +
      "a = 2;" +
      "b = 3;" +
      "c = 4;"
    );
    script.execute(executionContext);
    
    assertEquals(new Integer(2), contextInstance.getVariable("a"));
    // b was READ-ONLY ! 
    assertEquals(new Integer(1), contextInstance.getVariable("b"));
    assertEquals(new Integer(4), contextInstance.getVariable("c"));
  }

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  public void testCreateInputMapWithoutVariableAccesses() {
    ProcessDefinition processDefinition = ProcessDefinition.createNewProcessDefinition();
    ProcessInstance processInstance = new ProcessInstance(processDefinition);
    Token token = processInstance.getRootToken();
    ContextInstance contextInstance = processInstance.getContextInstance();
    contextInstance.setVariable("a", new Integer(1) );
    contextInstance.setVariable("b", new Integer(1) );
    contextInstance.setVariable("c", new Integer(1) );
    
    Script script = new Script();
    Map inputMap = script.createInputMap(new ExecutionContext(token));
    assertEquals(new Integer(1), inputMap.get("a"));
    assertEquals(new Integer(1), inputMap.get("b"));

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