org.apache.hadoop.hive.ql.txn.compactor

Class CompactionHeartbeatService

java.lang.Object

org.apache.hadoop.hive.ql.txn.compactor.CompactionHeartbeatService

public class CompactionHeartbeatService
extends Object

Singleton service responsible for heartbeating the compaction transactions.

Method Summary

Modifier and Type	Method and Description
static CompactionHeartbeatService	getInstance(HiveConf conf) Return the singleton instance of this class.
void	startHeartbeat(long txnId, long lockId, String tableName) Starts the heartbeat for the given transaction
void	stopHeartbeat(long txnId) Stops the heartbeat for the given transaction

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static CompactionHeartbeatService getInstance(HiveConf conf)

Return the singleton instance of this class.

Parameters:

conf - The HiveConf used to create the service. Used only during the firsst call

Returns:

Returns the singleton CompactionHeartbeatService

Throws:

IllegalStateException - Thrown when the service has already been destroyed.

startHeartbeat

public void startHeartbeat(long txnId,
                           long lockId,
                           String tableName)

Starts the heartbeat for the given transaction

Parameters:

txnId - The id of the compaction txn

lockId - The id of the lock associated with the txn

tableName - Required for logging only

Throws:

IllegalStateException - Thrown when the heartbeat for the given txn has already been started.

stopHeartbeat

public void stopHeartbeat(long txnId)
                   throws InterruptedException

Stops the heartbeat for the given transaction

Parameters:

txnId - The id of the compaction txn

Throws:

IllegalStateException - Thrown when there is no CompactionHeartbeater task associated with the given txnId.

InterruptedException