com.sleepycat.je.rep.impl.node

Class Replica.ConsistencyTracker

java.lang.Object

com.sleepycat.je.rep.impl.node.Replica.ConsistencyTracker

Enclosing class:

Replica

public class Replica.ConsistencyTracker
extends Object

Tracks the consistency of this replica wrt the Master. It provides the mechanisms that will cause a beginTransaction() or a joinGroup() to wait until the specified consistency policy is satisfied.

Constructor Summary

Constructors

Constructor and Description
ConsistencyTracker()

Method Summary

Modifier and Type	Method and Description
void	awaitVLSN(long vlsn, ReplicaConsistencyPolicy consistencyPolicy) Wait until the log record identified by VLSN has gone by.
long	getMasterTxnEndVLSN()
void	lagAwait(TimeConsistencyPolicy consistencyPolicy)
void	shutdown() Shutdown the consistency tracker.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConsistencyTracker

public ConsistencyTracker()

Method Detail

getMasterTxnEndVLSN

public long getMasterTxnEndVLSN()

lagAwait

public void lagAwait(TimeConsistencyPolicy consistencyPolicy)
              throws InterruptedException,
                     ReplicaConsistencyException,
                     DatabaseException

Throws:

InterruptedException

ReplicaConsistencyException

DatabaseException

awaitVLSN

public void awaitVLSN(long vlsn,
                      ReplicaConsistencyPolicy consistencyPolicy)
               throws InterruptedException,
                      ReplicaConsistencyException,
                      DatabaseException

Wait until the log record identified by VLSN has gone by.

Throws:

InterruptedException

ReplicaConsistencyException

DatabaseException

shutdown

public void shutdown()

Shutdown the consistency tracker. This is typically done as part of the shutdown of a replication node. It counts down all open latches, so the threads waiting on them can make progress. It's the responsibility of the waiting threads to check whether the latch countdown was due to a shutdown, and take appropriate action.