/* * Copyright (c) 2013 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.protocol.pcep.spi.pojo; import static com.google.common.base.Preconditions.checkState; import static java.util.Objects.requireNonNull; import java.util.List; import javax.annotation.concurrent.GuardedBy; import org.opendaylight.protocol.pcep.spi.PCEPExtensionProviderActivator; import org.opendaylight.protocol.pcep.spi.PCEPExtensionProviderContext; import org.opendaylight.yangtools.concepts.Registration; public abstract class AbstractPCEPExtensionProviderActivator implements AutoCloseable, PCEPExtensionProviderActivator { @GuardedBy("this") private List registrations; @GuardedBy("this") protected abstract List startImpl(PCEPExtensionProviderContext context); @Override public final synchronized void start(final PCEPExtensionProviderContext context) { checkState(this.registrations == null); this.registrations = requireNonNull(startImpl(context)); } @Override public final synchronized void stop() { if (this.registrations == null) { return; } this.registrations.forEach(Registration::close); this.registrations = null; } @Override public final void close() { stop(); } }