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

Class ODistributedLockTask

java.lang.Object

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

com.orientechnologies.orient.server.distributed.task.OAbstractReplicatedTask

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

All Implemented Interfaces:

ORemoteTask

public class ODistributedLockTask
extends OAbstractReplicatedTask

Task to acquire and release a distributed exclusive lock across the entire cluster. In case the server is declared unreachable, the lock is freed.

Author:

Luca Garulli (l.garulli--at--orientdb.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.OAbstractReplicatedTask

lastLSN

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

ALL, ANY, FAST_NOLOCK, LOCK, nodeSource

Constructor Summary

Constructors

Constructor and Description
ODistributedLockTask()
ODistributedLockTask(String lockManagerServer, String resource, long timeout, boolean acquire)

Method Summary

Modifier and Type	Method and Description
void	checkIsValid(ODistributedServerManager dManager) Checks the request is still valid.
Object	execute(ODistributedRequestId msgId, OServer iServer, ODistributedServerManager iManager, ODatabaseDocumentInternal database)
void	fromStream(DataInput in, ORemoteTaskFactory factory)
long	getDistributedTimeout()
int	getFactoryId()
String	getName()
int[]	getPartitionKey()
OCommandDistributedReplicateRequest.QUORUM_TYPE	getQuorumType()
ORemoteTask.RESULT_STRATEGY	getResultStrategy()
ORemoteTask	getUndoTask(ODistributedServerManager dManager, ODistributedRequestId reqId, List<String> servers)
boolean	isNodeOnlineRequired()
boolean	isUsingDatabase()
void	toStream(DataOutput out)
String	toString()
void	undo(ODistributedServerManager iManager)

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

getFixTask, getLastLSN

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

getNodeSource, getSynchronousTimeout, getTotalTimeout, hasResponse, isIdempotent, setNodeSource

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.orientechnologies.orient.server.distributed.task.ORemoteTask

finished, received

Field Detail

FACTORYID

public static final int FACTORYID

See Also:

Constant Field Values

Constructor Detail

ODistributedLockTask

public ODistributedLockTask()

ODistributedLockTask

public ODistributedLockTask(String lockManagerServer,
                            String resource,
                            long timeout,
                            boolean acquire)

Method Detail

execute

public Object execute(ODistributedRequestId msgId,
                      OServer iServer,
                      ODistributedServerManager iManager,
                      ODatabaseDocumentInternal database)
               throws Exception

Specified by:

execute in interface ORemoteTask

Specified by:

execute in class OAbstractRemoteTask

Throws:

Exception

undo

public void undo(ODistributedServerManager iManager)

getUndoTask

public ORemoteTask getUndoTask(ODistributedServerManager dManager,
                               ODistributedRequestId reqId,
                               List<String> servers)

Overrides:

getUndoTask in class OAbstractReplicatedTask

getPartitionKey

public int[] getPartitionKey()

Specified by:

getPartitionKey in interface ORemoteTask

Overrides:

getPartitionKey in class OAbstractRemoteTask

getQuorumType

public OCommandDistributedReplicateRequest.QUORUM_TYPE getQuorumType()

Specified by:

getQuorumType in interface ORemoteTask

Specified by:

getQuorumType in class OAbstractRemoteTask

getResultStrategy

public ORemoteTask.RESULT_STRATEGY getResultStrategy()

Specified by:

getResultStrategy in interface ORemoteTask

Overrides:

getResultStrategy in class OAbstractRemoteTask

isUsingDatabase

public boolean isUsingDatabase()

Specified by:

isUsingDatabase in interface ORemoteTask

Overrides:

isUsingDatabase 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

isNodeOnlineRequired

public boolean isNodeOnlineRequired()

Specified by:

isNodeOnlineRequired in interface ORemoteTask

Overrides:

isNodeOnlineRequired in class OAbstractRemoteTask

checkIsValid

public void checkIsValid(ODistributedServerManager dManager)

Description copied from interface: ORemoteTask

Checks the request is still valid.

Specified by:

checkIsValid in interface ORemoteTask

Overrides:

checkIsValid in class OAbstractRemoteTask

getDistributedTimeout

public long getDistributedTimeout()

Specified by:

getDistributedTimeout in interface ORemoteTask

Overrides:

getDistributedTimeout 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