bgp/rib-mock/src/main/java/org/opendaylight/protocol/bgp/rib/mock/EventBusRegistration.java

   1 /*
   2  * Copyright (c) 2013 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.rib.mock;
   9
  10 import java.util.List;
  11 import java.util.Set;
  12
  13 import org.opendaylight.protocol.bgp.parser.BGPSession;
  14 import org.opendaylight.protocol.bgp.parser.BGPSessionListener;
  15 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  16 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.AsNumber;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Keepalive;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Open;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.BgpParameters;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.MultiprotocolCase;
  22 import org.opendaylight.yangtools.concepts.AbstractListenerRegistration;
  23 import org.opendaylight.yangtools.yang.binding.Notification;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 import com.google.common.collect.Sets;
  28 import com.google.common.eventbus.EventBus;
  29 import com.google.common.eventbus.Subscribe;
  30
  31 /**
  32  * This class has @Subscribe annotated methods which receive events from {@link EventBus} . Events are produced by
  33  * {@link BGPMock}, and each instance notifies exactly one {@link BGPSessionListener}.
  34  */
  35 final class EventBusRegistration extends AbstractListenerRegistration<BGPSessionListener> {
  36
  37         private static final Logger LOG = LoggerFactory.getLogger(EventBusRegistration.class);
  38
  39         private final EventBus eventBus;
  40
  41         public static EventBusRegistration createAndRegister(final EventBus eventBus, final BGPSessionListener listener,
  42                         final List<Notification> allPreviousMessages) {
  43                 final EventBusRegistration instance = new EventBusRegistration(eventBus, listener, allPreviousMessages);
  44                 eventBus.register(instance);
  45                 return instance;
  46         }
  47
  48         private EventBusRegistration(final EventBus eventBus, final BGPSessionListener listener, final List<Notification> allPreviousMessages) {
  49                 super(listener);
  50                 this.eventBus = eventBus;
  51                 for (final Notification message : allPreviousMessages) {
  52                         sendMessage(listener, message);
  53                 }
  54         }
  55
  56         @Subscribe
  57         public void onMessage(final Notification message) {
  58                 sendMessage(this.getInstance(), message);
  59         }
  60
  61         @Override
  62         public synchronized void removeRegistration() {
  63                 this.eventBus.unregister(this);
  64         }
  65
  66         private static void sendMessage(final BGPSessionListener listener, final Notification message) {
  67                 if (BGPMock.CONNECTION_LOST_MAGIC_MSG.equals(message)) {
  68                         listener.onSessionTerminated(null, null);
  69                 } else if (message instanceof Open) {
  70                         final Set<BgpTableType> tts = Sets.newHashSet();
  71                         for (final BgpParameters param : ((Open) message).getBgpParameters()) {
  72                                 if (param.getCParameters() instanceof MultiprotocolCase) {
  73                                         final MultiprotocolCase p = (MultiprotocolCase) param.getCParameters();
  74                                         LOG.debug("Adding open parameter {}", p);
  75                                         final BgpTableType type = new BgpTableTypeImpl(p.getMultiprotocolCapability().getAfi(), p.getMultiprotocolCapability().getSafi());
  76                                         tts.add(type);
  77                                 }
  78                         }
  79
  80                         listener.onSessionUp(new BGPSession() {
  81
  82                                 @Override
  83                                 public void close() {
  84                                         LOG.debug("Session {} closed", this);
  85                                 }
  86
  87                                 @Override
  88                                 public Set<BgpTableType> getAdvertisedTableTypes() {
  89                                         return tts;
  90                                 }
  91
  92                                 @Override
  93                                 public byte[] getBgpId() {
  94                                         return new byte[] { (byte) 127, 0, 0, 1 };
  95                                 }
  96
  97                                 @Override
  98                                 public AsNumber getAsNumber() {
  99                                         return new AsNumber(30L);
 100                                 }
 101                         });
 102                 } else if (!(message instanceof Keepalive)) {
 103                         listener.onMessage(null, message);
 104                 }
 105         }
 106 }