2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.protocol.concepts;
10 import javax.annotation.concurrent.GuardedBy;
11 import javax.annotation.concurrent.ThreadSafe;
14 * Utility registration handle. It is a convenience for register-style method which can return an AutoCloseable realized
15 * by a subclass of this class. Invoking the close() method triggers unregistration of the state the method installed.
18 public abstract class AbstractRegistration implements AutoCloseable {
20 private boolean closed = false;
23 * Remove the state referenced by this registration. This method is guaranteed to be called at most once. The
24 * referenced state must be retained until this method is invoked.
26 protected abstract void removeRegistration();
29 public final synchronized void close() {