com.bigdata.service

Class MetadataService.JoinIndexPartitionTask

java.lang.Object

com.bigdata.journal.AbstractTask

com.bigdata.service.MetadataService.JoinIndexPartitionTask

All Implemented Interfaces:

ITask, Callable

Enclosing class:

MetadataService

protected static class MetadataService.JoinIndexPartitionTask
extends AbstractTask

Updates the MetadataIndex to reflect the join of 2 or more index partitions.

Version:

$Id$

Author:

Bryan Thompson

Nested Class Summary

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

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

Field Summary

Fields

Modifier and Type	Field and Description
protected PartitionLocator	newLocator
protected PartitionLocator[]	oldLocators

Fields inherited from class com.bigdata.journal.AbstractTask

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

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MetadataService.JoinIndexPartitionTask(IConcurrencyManager concurrencyManager, String resource, PartitionLocator[] oldLocators, PartitionLocator newLocator)

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	doTask() Implement the task behavior here.

Methods inherited from class com.bigdata.journal.AbstractTask

assertResource, assertRunning, assertUnisolated, call, clearLoggingContext, 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

Field Detail

oldLocators

protected final PartitionLocator[] oldLocators

newLocator

protected final PartitionLocator newLocator

Constructor Detail

MetadataService.JoinIndexPartitionTask

protected MetadataService.JoinIndexPartitionTask(IConcurrencyManager concurrencyManager,
                                      String resource,
                                      PartitionLocator[] oldLocators,
                                      PartitionLocator newLocator)

Parameters:

concurrencyManager -

resource -

oldLocators -

newLocator -

Method Detail

doTask

protected Object doTask()
                 throws Exception

Description copied from class: AbstractTask

Implement the task behavior here.

Note: Long-running implementations MUST periodically test Thread.interrupted() and MUST throw an exception, such as InterruptedException, if they are interrupted. This behavior allows tasks to be canceled in a timely manner.

If you ignore or fail to test Thread.interrupted() then your task CAN NOT be aborted. If it is Future.cancel(boolean) with false then the task will run to completion even though it has been cancelled (but the Future will appear to have been cancelled).

If you simply return rather than throwing an exception then the WriteExecutorService will assume that your task completed and your (partial) results will be made restart-safe at the next commit!

Specified by:

doTask in class AbstractTask

Returns:

The object that will be returned by AbstractTask.call() iff the operation succeeds.

Throws:

Exception - The exception that will be thrown by AbstractTask.call() iff the operation fails.

InterruptedException - This exception SHOULD be thrown if Thread.interrupted() becomes true during execution.