public class CountDownLatchService extends Object implements ManagedService, RemoteService, MigrationAwareService, QuorumAwareService
Modifier and Type | Field and Description |
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static String |
SERVICE_NAME |
Constructor and Description |
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CountDownLatchService() |
Modifier and Type | Method and Description |
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void |
add(CountDownLatchContainer latch) |
void |
beforeMigration(PartitionMigrationEvent partitionMigrationEvent)
Called before migration process starts, on both source and destination members.
|
void |
commitMigration(PartitionMigrationEvent event)
Commits the migration process for this service, on both source and destination members.
|
boolean |
containsLatch(String name) |
void |
countDown(String name) |
CountDownLatchProxy |
createDistributedObject(String name)
Creates a distributed object.
|
void |
destroyDistributedObject(String name)
Destroys a distributed object.
|
int |
getCount(String name) |
CountDownLatchContainer |
getCountDownLatchContainer(String name) |
String |
getQuorumName(String name)
Gets the name of the quorum associated with specified operation name.
|
void |
init(NodeEngine nodeEngine,
Properties properties)
Initializes this service.
|
Operation |
prepareReplicationOperation(PartitionReplicationEvent event)
Returns an operation to replicate service data and/or state for a specific partition replica
on another cluster member.
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void |
reset()
Resets this service back to its initial state.
|
void |
rollbackMigration(PartitionMigrationEvent event)
Rollback the migration process for this service, on both source and destination members.
|
boolean |
setCount(String name,
int count) |
void |
setCountDirect(String name,
int count) |
boolean |
shouldWait(String name) |
void |
shutdown(boolean terminate)
Shuts down this service.
|
public static final String SERVICE_NAME
public int getCount(String name)
public boolean setCount(String name, int count)
public void setCountDirect(String name, int count)
public void countDown(String name)
public boolean shouldWait(String name)
public void init(NodeEngine nodeEngine, Properties properties)
ManagedService
init
in interface ManagedService
nodeEngine
- the NodeEngine that this service belongs toproperties
- the Properties (can be used to pass settings to the service)public void reset()
ManagedService
TODO: what is the purpose of reset
reset
in interface ManagedService
public void shutdown(boolean terminate)
ManagedService
TODO: what is the purpose of the terminate variable
shutdown
in interface ManagedService
terminate
- true
to shut down this servicepublic CountDownLatchProxy createDistributedObject(String name)
RemoteService
createDistributedObject
in interface RemoteService
name
- the name for the created distributed objectpublic void destroyDistributedObject(String name)
RemoteService
destroyDistributedObject
in interface RemoteService
name
- the name of the distributed object to destroypublic void beforeMigration(PartitionMigrationEvent partitionMigrationEvent)
MigrationAwareService
Service can take actions required before migration. Migration process will block until this method returns. If this method fails by throwing an exception, migration process for specific partition will fail and will be rolled back.
beforeMigration
in interface MigrationAwareService
partitionMigrationEvent
- migration eventpublic Operation prepareReplicationOperation(PartitionReplicationEvent event)
MigrationAwareService
This method will be called on source member whenever partitioning system requires to copy/replicate a partition replica. Returned operation will be executed on destination member. If operation fails by throwing exception, migration process will fail and will be rolled back.
Returning null is allowed and means service does not have anything to replicate.
prepareReplicationOperation
in interface MigrationAwareService
event
- replicationpublic void commitMigration(PartitionMigrationEvent event)
MigrationAwareService
Commit is not expected to fail at this point, all exceptions will be suppressed and logged. Implementations of this method must be thread safe as this method may be called concurrently for different migrations on different partitions.
commitMigration
in interface MigrationAwareService
event
- migration eventpublic void rollbackMigration(PartitionMigrationEvent event)
MigrationAwareService
Rollback is not expected to fail at this point, all exceptions will be suppressed and logged. Implementations of this method must be thread safe as this method may be called concurrently for different migrations on different partitions.
rollbackMigration
in interface MigrationAwareService
event
- migration eventpublic CountDownLatchContainer getCountDownLatchContainer(String name)
public boolean containsLatch(String name)
public void add(CountDownLatchContainer latch)
public String getQuorumName(String name)
QuorumAwareService
getQuorumName
in interface QuorumAwareService
name
- the operation name for which the quorum name is returedCopyright © 2018 Hazelcast, Inc.. All rights reserved.