Package org.lsst.ccs

Class ConfigurationService.ConfigurationLock

java.lang.Object

org.lsst.ccs.ConfigurationService.ConfigurationLock

All Implemented Interfaces:

AutoCloseable

Enclosing class:

ConfigurationService

public class ConfigurationService.ConfigurationLock
extends Object
implements AutoCloseable

Encapsulates a reader lock on the subsystem configuration. An active reader lock will prevent the granting of non-recursive writer locks but will allow more reader locks to be granted. When a writer lock is active then no reader locks or further non-recursive write locks will be granted until the writer lock is released. A writer lock will not be granted until all reader locks are released.

Where possible call the constructor using a try-with-resources statement so that the lock will be released automatically when that statement is exited. Otherwise an explicit call to close() will be required to release the lock.

Field Summary

Fields

Modifier and Type	Field	Description
final Lock	readLock

Method Summary

Modifier and Type	Method	Description
void	close()	Releases the configuration lock;

Methods inherited from class java.lang.Object

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

Field Details

readLock

public final Lock readLock

Method Details

close

public void close()

Releases the configuration lock;

Specified by:

close in interface AutoCloseable