com.orientechnologies.orient.server.distributed.impl.task

Class OHeartbeatTask

java.lang.Object

com.orientechnologies.orient.server.distributed.task.OAbstractRemoteTask

com.orientechnologies.orient.server.distributed.impl.task.OHeartbeatTask

All Implemented Interfaces:

ORemoteTask

public class OHeartbeatTask
extends OAbstractRemoteTask

Task to manage the end of distributed transaction when no fix is needed (OFixTxTask) and all the locks must be released. Locks are necessary to prevent concurrent modification of records before the transaction is finished.
This task uses the same partition keys used by TxTask to avoid synchronizing all the worker threads (and queues).

Author:

Luca Garulli (l.garulli--at--orientechnologies.com)

Nested Class Summary

Nested classes/interfaces inherited from interface com.orientechnologies.orient.server.distributed.task.ORemoteTask

ORemoteTask.RESULT_STRATEGY

Field Summary

Fields

Modifier and Type	Field and Description
static int	FACTORYID

Fields inherited from class com.orientechnologies.orient.server.distributed.task.OAbstractRemoteTask

ALL, ANY, nodeSource

Constructor Summary

Constructors

Constructor and Description
OHeartbeatTask()

Method Summary

Modifier and Type	Method and Description
Object	execute(ODistributedRequestId msgId, OServer iServer, ODistributedServerManager iManager, com.orientechnologies.orient.core.db.ODatabaseDocumentInternal database)
void	fromStream(DataInput in, ORemoteTaskFactory factory)
long	getDistributedTimeout() Computes the timeout according to the transaction size.
int	getFactoryId()
String	getName()
com.orientechnologies.orient.core.command.OCommandDistributedReplicateRequest.QUORUM_TYPE	getQuorumType()
ORemoteTask.RESULT_STRATEGY	getResultStrategy()
long	getSynchronousTimeout(int iSynchNodes)
long	getTotalTimeout(int iTotalNodes)
boolean	isIdempotent()
boolean	isUsingDatabase()
void	toStream(DataOutput out)
String	toString()

Methods inherited from class com.orientechnologies.orient.server.distributed.task.OAbstractRemoteTask

getNodeSource, getPartitionKey, isNodeOnlineRequired, setNodeSource

Methods inherited from class java.lang.Object

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

Field Detail

FACTORYID

public static final int FACTORYID

See Also:

Constant Field Values

Constructor Detail

OHeartbeatTask

public OHeartbeatTask()

Method Detail

execute

public Object execute(ODistributedRequestId msgId,
                      OServer iServer,
                      ODistributedServerManager iManager,
                      com.orientechnologies.orient.core.db.ODatabaseDocumentInternal database)
               throws Exception

Specified by:

execute in interface ORemoteTask

Specified by:

execute in class OAbstractRemoteTask

Throws:

Exception

getQuorumType

public com.orientechnologies.orient.core.command.OCommandDistributedReplicateRequest.QUORUM_TYPE getQuorumType()

Specified by:

getQuorumType in interface ORemoteTask

Specified by:

getQuorumType in class OAbstractRemoteTask

isUsingDatabase

public boolean isUsingDatabase()

Specified by:

isUsingDatabase in interface ORemoteTask

Overrides:

isUsingDatabase in class OAbstractRemoteTask

getResultStrategy

public ORemoteTask.RESULT_STRATEGY getResultStrategy()

Specified by:

getResultStrategy in interface ORemoteTask

Overrides:

getResultStrategy in class OAbstractRemoteTask

toStream

public void toStream(DataOutput out)
              throws IOException

Specified by:

toStream in interface ORemoteTask

Overrides:

toStream in class OAbstractRemoteTask

Throws:

IOException

fromStream

public void fromStream(DataInput in,
                       ORemoteTaskFactory factory)
                throws IOException

Specified by:

fromStream in interface ORemoteTask

Overrides:

fromStream in class OAbstractRemoteTask

Throws:

IOException

getDistributedTimeout

public long getDistributedTimeout()

Computes the timeout according to the transaction size.

Specified by:

getDistributedTimeout in interface ORemoteTask

Overrides:

getDistributedTimeout in class OAbstractRemoteTask

Returns:

isIdempotent

public boolean isIdempotent()

Specified by:

isIdempotent in interface ORemoteTask

Overrides:

isIdempotent in class OAbstractRemoteTask

getSynchronousTimeout

public long getSynchronousTimeout(int iSynchNodes)

Specified by:

getSynchronousTimeout in interface ORemoteTask

Overrides:

getSynchronousTimeout in class OAbstractRemoteTask

getTotalTimeout

public long getTotalTimeout(int iTotalNodes)

Specified by:

getTotalTimeout in interface ORemoteTask

Overrides:

getTotalTimeout in class OAbstractRemoteTask

getName

public String getName()

Specified by:

getName in interface ORemoteTask

Specified by:

getName in class OAbstractRemoteTask

getFactoryId

public int getFactoryId()

toString

public String toString()

Overrides:

toString in class OAbstractRemoteTask