com.bigdata.resources
Class AbstractPrepareTask<T>

java.lang.Object
  com.bigdata.journal.AbstractTask<T>
      com.bigdata.resources.AbstractResourceManagerTask<T>
          com.bigdata.resources.AbstractPrepareTask<T>

All Implemented Interfaces:

ITask<T>, Callable<T>

Direct Known Subclasses:

CompactingMergeTask, IncrementalBuildTask, JoinIndexPartitionTask, MoveTask, ScatterSplitTask, SplitIndexPartitionTask, SplitTailTask

public abstract class AbstractPrepareTask<T>
extends AbstractResourceManagerTask<T>

Base class for the prepare phase which reads on the old journal.

Version:

$Id: AbstractPrepareTask.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.journal.AbstractTask

AbstractTask.DelegateTask<T>, AbstractTask.InnerReadWriteTxServiceCallable, AbstractTask.InnerWriteServiceCallable<T>, AbstractTask.ResubmitException

Field Summary

Fields inherited from class com.bigdata.resources.AbstractResourceManagerTask

DEBUG, INFO, log, resourceManager

Fields inherited from class com.bigdata.journal.AbstractTask

checkpointNanoTime, concurrencyManager, isReadWriteTx, nanoTime_assignedWorker, nanoTime_beginWork, nanoTime_finishedWork, nanoTime_submitTask, readOnly, taskCounters, timestamp, transactionManager, tx

Constructor Summary

AbstractPrepareTask(ResourceManager resourceManager, long timestamp, String resource)

AbstractPrepareTask(ResourceManager resourceManager, long timestamp, String[] resource)

Method Summary

protected abstract void

clearRefs() Method is responsible for clearing the SoftReferences held by ViewMetadata for the source view(s) on the old journal.

Methods inherited from class com.bigdata.resources.AbstractResourceManagerTask

toString

Methods inherited from class com.bigdata.journal.AbstractTask

assertResource, assertRunning, assertUnisolated, call, clearLoggingContext, doTask, dropIndex, getCommitTime, getIndex, getJournal, getOnlyResource, getResource, getResourceManager, getTaskCounters, getTaskName, getTimestamp, isResource, registerIndex, setupLoggingContext, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractPrepareTask

public AbstractPrepareTask(ResourceManager resourceManager,
                           long timestamp,
                           String resource)

Parameters:

resourceManager -

timestamp -

resource -

AbstractPrepareTask

public AbstractPrepareTask(ResourceManager resourceManager,
                           long timestamp,
                           String[] resource)

Parameters:

resourceManager -

timestamp -

resource -

Method Detail

clearRefs

protected abstract void clearRefs()

Method is responsible for clearing the SoftReferences held by ViewMetadata for the source view(s) on the old journal.

Note: This method MUST be invoked in order to permit those references to be cleared more eagerly than the end of the entire asynchronous overflow operation (which is when the task references would themselves go out of scope and become available for GC).