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org.apache.predictionio.workflow

CleanupFunctions

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object CleanupFunctions

:: DeveloperApi :: Singleton object that collects anonymous functions to be executed to allow the process to end gracefully.

For example, the Elasticsearch REST storage client maintains an internal connection pool that must be closed to allow the process to exit.

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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  4. def add(f: () ⇒ Unit): Seq[() ⇒ Unit]

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    Add a function to be called during cleanup.

    Add a function to be called during cleanup.

    import org.apache.predictionio.workflow.CleanupFunctions
    
    CleanupFunctions.add { MyStorageClass.close }
  5. final def asInstanceOf[T0]: T0

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  6. def clone(): AnyRef

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  9. def finalize(): Unit

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  12. final def isInstanceOf[T0]: Boolean

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  13. final def ne(arg0: AnyRef): Boolean

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  14. final def notify(): Unit

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  15. final def notifyAll(): Unit

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  16. def run(): Unit

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    Call all cleanup functions in order added.

    Call all cleanup functions in order added.

    import org.apache.predictionio.workflow.CleanupFunctions
    
    try {
      // Much code that needs cleanup
      // whether successful or error thrown.
    } finally {
      CleanupFunctions.run()
    }
  17. final def synchronized[T0](arg0: ⇒ T0): T0

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  18. def toString(): String

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  19. final def wait(): Unit

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  20. final def wait(arg0: Long, arg1: Int): Unit

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  21. final def wait(arg0: Long): Unit

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