Package com.sleepycat.db

Class RecoveryOperation

java.lang.Object
com.sleepycat.db.RecoveryOperation
public final class RecoveryOperation extends Object
The recovery operation being performed when LogRecordHandler.handleLogRecord is called.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final RecoveryOperation
    ABORT
    The log is being read backward during a transaction abort; undo the operation described by the log record.
    static final RecoveryOperation
    APPLY
    The log is being applied on a replica site; redo the operation described by the log record.
    static final RecoveryOperation
    BACKWARD_ROLL
    The log is being read backward to determine which transactions have been committed and to abort those operations that were not; undo the operation described by the log record.
    static final RecoveryOperation
    FORWARD_ROLL
    The log is being played forward; redo the operation described by the log record.
    static final RecoveryOperation
    PRINT
    The log is being printed for debugging purposes; print the contents of this log record in the desired format.

  • Method Summary

    Modifier and Type
    Method
    Description
    static RecoveryOperation
    fromFlag(int flag)
    Internal: this is public only so it can be called from an internal package.
    String
    toString()

    Methods inherited from class java.lang.Object

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

  • Field Details

    • BACKWARD_ROLL

      public static final RecoveryOperation BACKWARD_ROLL
      The log is being read backward to determine which transactions have been committed and to abort those operations that were not; undo the operation described by the log record.

    • FORWARD_ROLL

      public static final RecoveryOperation FORWARD_ROLL
      The log is being played forward; redo the operation described by the log record.

      The FORWARD_ROLL and APPLY operations frequently imply the same actions, redoing changes that appear in the log record, although if a recovery function is to be used on a replication client where reads may be taking place concurrently with the processing of incoming messages, APPLY operations should also perform appropriate locking.

    • ABORT

      public static final RecoveryOperation ABORT
      The log is being read backward during a transaction abort; undo the operation described by the log record.

    • APPLY

      public static final RecoveryOperation APPLY
      The log is being applied on a replica site; redo the operation described by the log record.

      The FORWARD_ROLL and APPLY operations frequently imply the same actions, redoing changes that appear in the log record, although if a recovery function is to be used on a replication client where reads may be taking place concurrently with the processing of incoming messages, APPLY operations should also perform appropriate locking.

    • PRINT

      public static final RecoveryOperation PRINT
      The log is being printed for debugging purposes; print the contents of this log record in the desired format.

  • Method Details

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • fromFlag

      public static RecoveryOperation fromFlag(int flag)
      Internal: this is public only so it can be called from an internal package.
      Parameters:
      flag - the internal flag value to be wrapped in a RecoveryException object