Package javax.batch.api.chunk

Class AbstractCheckpointAlgorithm

java.lang.Object
javax.batch.api.chunk.AbstractCheckpointAlgorithm
All Implemented Interfaces:
CheckpointAlgorithm
public abstract class AbstractCheckpointAlgorithm extends Object implements CheckpointAlgorithm
The AbstractCheckpointAlgorithm provides default implementations of less commonly implemented methods.

  • Constructor Summary

    Constructors
    Constructor
    Description
    AbstractCheckpointAlgorithm()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    beginCheckpoint()
    Override this method for the CheckpointAlgorithm to do something before a checkpoint interval begins (before the next chunk transaction begins).
    int
    checkpointTimeout()
    Override this method if the CheckpointAlgorithm establishes a checkpoint timeout.
    void
    endCheckpoint()
    Override this method for the CheckpointAlgorithm to do something after a checkpoint is taken (after the chunk transaction is committed).
    abstract boolean
    isReadyToCheckpoint()
    Implement logic in this method to decide if a checkpoint should be taken now.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • AbstractCheckpointAlgorithm

      public AbstractCheckpointAlgorithm()

  • Method Details

    • checkpointTimeout

      public int checkpointTimeout() throws Exception
      Override this method if the CheckpointAlgorithm establishes a checkpoint timeout. The default implementation returns 0, which means the maximum permissible timeout allowed by the runtime environment.
      Specified by:
      checkpointTimeout in interface CheckpointAlgorithm
      Returns:
      the timeout interval (expressed in seconds) to use for the next checkpoint interval
      Throws:
      Exception - (or subclass) if an error occurs.

    • beginCheckpoint

      public void beginCheckpoint() throws Exception
      Override this method for the CheckpointAlgorithm to do something before a checkpoint interval begins (before the next chunk transaction begins). The default implementation does nothing.
      Specified by:
      beginCheckpoint in interface CheckpointAlgorithm
      Throws:
      Exception - (or subclass) if an error occurs.

    • isReadyToCheckpoint

      public abstract boolean isReadyToCheckpoint() throws Exception
      Implement logic in this method to decide if a checkpoint should be taken now.
      Specified by:
      isReadyToCheckpoint in interface CheckpointAlgorithm
      Returns:
      boolean indicating whether or not to checkpoint now.
      Throws:
      Exception - (or subclass) if an error occurs.

    • endCheckpoint

      public void endCheckpoint() throws Exception
      Override this method for the CheckpointAlgorithm to do something after a checkpoint is taken (after the chunk transaction is committed). The default implementation does nothing.
      Specified by:
      endCheckpoint in interface CheckpointAlgorithm
      Throws:
      Exception - (or subclass) if an error occurs.