org.opennms.netmgt.alarmd

Class StripedExt

java.lang.Object

org.opennms.netmgt.alarmd.StripedExt

public class StripedExt
extends Object

Here we extend Striped to support creating fair reentrant locks. We use reflection to invoke com.google.common.util.concurrent.Striped.CompactStriped#CompactStriped(int, Supplier) and provide a supplier that creates a fair lock. This is clearly a hack, but seems better than the alternative of A) trying to find another library that supports this or B) re-implementing striped locking ourselves. Guava Feature Request: https://github.com/google/guava/issues/2514

Author:

jwhite

Constructor Summary

Constructors

Constructor and Description
StripedExt()

Method Summary

Modifier and Type	Method and Description
static com.google.common.util.concurrent.Striped<Lock>	fairLock(int stripes) Creates a Striped<Lock> with eagerly initialized, strongly referenced locks.

Methods inherited from class java.lang.Object

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

Constructor Detail

StripedExt

public StripedExt()

Method Detail

fairLock

public static com.google.common.util.concurrent.Striped<Lock> fairLock(int stripes)

Creates a Striped<Lock> with eagerly initialized, strongly referenced locks. Every lock is fair and reentrant.

Parameters:

stripes - the minimum number of stripes (locks) required

Returns:

a new Striped<Lock>