org.apache.ambari.server.logging

Class LockFactory

java.lang.Object

org.apache.ambari.server.logging.LockFactory

public class LockFactory
extends Object

Factory to create locks depending on configuration. If lock profiling is enabled, it creates instrumented locks that collect statistics and log requests. If profiling is disabled, it creates regular reentrant locks.

See Also:

Configuration.isServerLocksProfilingEnabled()

Constructor Summary

Constructors

Constructor and Description
LockFactory(Configuration config)

Method Summary

Modifier and Type	Method and Description
void	debugDump(StringBuilder sb) If lock profiling is enabled, append summary statistics about lock usage to sb
Lock	newLock()
Lock	newLock(String label)
ReadWriteLock	newReadWriteLock()
ReadWriteLock	newReadWriteLock(String label)

Methods inherited from class java.lang.Object

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

Constructor Detail

LockFactory

@Inject
public LockFactory(Configuration config)

Method Detail

newLock

public Lock newLock()

Returns:

a new Lock instance (implementation depends on configuration setting) without any special label to identify it in log messages

newLock

public Lock newLock(String label)

Returns:

a new Lock instance (implementation depends on configuration setting) with label to identify it in log messages

newReadWriteLock

public ReadWriteLock newReadWriteLock()

Returns:

a new ReadWriteLock instance (implementation depends on configuration setting) without any special label to identify it in log messages

newReadWriteLock

public ReadWriteLock newReadWriteLock(String label)

Returns:

a new ReadWriteLock instance (implementation depends on configuration setting) with label to identify it in log messages

debugDump

public void debugDump(StringBuilder sb)

If lock profiling is enabled, append summary statistics about lock usage to sb

Parameters:

sb - the buffer to append the statistics to