Remove unused MD-SAL utilities and interfaces.

[controller.git] / opendaylight / md-sal / sal-common-impl / src / main / java / org / opendaylight / controller / md / sal / common / impl / util / AbstractLockableDelegator.java

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 (file)
index 4d756f1..0000000
--- 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<T> implements Delegator<T> {
-
-    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;
-    }
-}