bgp/openconfig-spi/src/main/java/org/opendaylight/protocol/bgp/openconfig/spi/AbstractBGPTableTypeRegistryProviderActivator.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.bgp.openconfig.spi;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.base.Preconditions;
  13 import java.util.List;
  14 import org.checkerframework.checker.lock.qual.GuardedBy;
  15 import org.checkerframework.checker.lock.qual.Holding;
  16 import org.opendaylight.yangtools.concepts.AbstractRegistration;
  17
  18 public abstract class AbstractBGPTableTypeRegistryProviderActivator
  19         implements AutoCloseable, BGPTableTypeRegistryProviderActivator {
  20
  21     @GuardedBy("this")
  22     private List<AbstractRegistration> registrations;
  23
  24     @Holding("this")
  25     protected abstract List<AbstractRegistration> startBGPTableTypeRegistryProviderImpl(
  26             BGPTableTypeRegistryProvider provider);
  27
  28     @Override
  29     public final synchronized void startBGPTableTypeRegistryProvider(final BGPTableTypeRegistryProvider provider) {
  30         Preconditions.checkState(this.registrations == null);
  31         this.registrations = requireNonNull(startBGPTableTypeRegistryProviderImpl(provider));
  32     }
  33
  34     @Override
  35     public final synchronized void stopBGPTableTypeRegistryProvider() {
  36         if (this.registrations == null) {
  37             return;
  38         }
  39         this.registrations.forEach(AbstractRegistration::close);
  40         this.registrations = null;
  41     }
  42
  43     @Override
  44     public final void close() {
  45         stopBGPTableTypeRegistryProvider();
  46     }
  47 }