X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;ds=sidebyside;f=opendaylight%2Fmd-sal%2Fsal-common-impl%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fmd%2Fsal%2Fcommon%2Fimpl%2Futil%2FAbstractLockableDelegator.java;fp=opendaylight%2Fmd-sal%2Fsal-common-impl%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fmd%2Fsal%2Fcommon%2Fimpl%2Futil%2FAbstractLockableDelegator.java;h=0000000000000000000000000000000000000000;hb=e53333bdb1426177d8ee7f3563ae8cca7ca49f87;hp=4d756f1d67380851c726a41a321a1e53ff7c8993;hpb=71d50da95da23142c9c6bd23817d90d910654ce3;p=controller.git diff --git a/opendaylight/md-sal/sal-common-impl/src/main/java/org/opendaylight/controller/md/sal/common/impl/util/AbstractLockableDelegator.java b/opendaylight/md-sal/sal-common-impl/src/main/java/org/opendaylight/controller/md/sal/common/impl/util/AbstractLockableDelegator.java deleted file mode 100644 index 4d756f1d67..0000000000 --- a/opendaylight/md-sal/sal-common-impl/src/main/java/org/opendaylight/controller/md/sal/common/impl/util/AbstractLockableDelegator.java +++ /dev/null @@ -1,81 +0,0 @@ -/* - * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved. - * - * This program and the accompanying materials are made available under the - * terms of the Eclipse Public License v1.0 which accompanies this distribution, - * and is available at http://www.eclipse.org/legal/epl-v10.html - */ -package org.opendaylight.controller.md.sal.common.impl.util; - -import java.util.concurrent.locks.Lock; -import java.util.concurrent.locks.ReentrantReadWriteLock; -import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock; -import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock; - -import org.opendaylight.yangtools.concepts.Delegator; - -import com.google.common.base.Preconditions; - -public class AbstractLockableDelegator implements Delegator { - - private final ReentrantReadWriteLock delegateLock = new ReentrantReadWriteLock(); - private final ReadLock delegateReadLock = delegateLock.readLock(); - private final WriteLock delegateWriteLock = delegateLock.writeLock(); - - - protected Lock getDelegateReadLock() { - return delegateReadLock; - } - - private T delegate; - - public AbstractLockableDelegator() { - // NOOP - } - - public AbstractLockableDelegator(T initialDelegate) { - delegate = initialDelegate; - } - - @Override - public T getDelegate() { - try { - delegateReadLock.lock(); - return delegate; - } finally { - delegateReadLock.unlock(); - } - } - - public T retrieveDelegate() { - try { - delegateReadLock.lock(); - Preconditions.checkState(delegate != null,"Delegate is null"); - return delegate; - } finally { - delegateReadLock.unlock(); - } - } - - /** - * - * @param newDelegate - * @return oldDelegate - */ - public final T changeDelegate(T newDelegate) { - try { - delegateWriteLock.lock(); - T oldDelegate = delegate; - delegate = newDelegate; - onDelegateChanged(oldDelegate, newDelegate); - return oldDelegate; - } finally { - delegateWriteLock.unlock(); - } - } - - - protected void onDelegateChanged(T oldDelegate, T newDelegate) { - // NOOP in abstract calss; - } -}