# Package org.jbpm.process.instance.impl

- Interface Summary
  Interface | Description
  --- | ---
  Action |
  AssignmentAction |
  ConstraintEvaluator |
  ContextInstanceFactory |
  ReturnValueEvaluator |

- Class Summary
  Class | Description
  --- | ---
  CancelNodeInstanceAction |
  ContextInstanceFactoryRegistry |
  DefaultProcessInstanceManager |
  DefaultProcessInstanceManagerFactory |
  DefaultSingletonProcessInstanceManagerFactory |
  JavaScriptAction |
  JavaScriptReturnValueEvaluator |
  MVELAction |
  MVELReturnValueEvaluator |
  NoOpExecutionErrorHandler |
  ProcessInstanceImpl | Default implementation of a process instance.
  ReturnValueConstraintEvaluator | Default implementation of a constraint.
  RuleConstraintEvaluator | Default implementation of a constraint.
  XPATHReturnValueEvaluator |

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