bgp/rib-mock/src/main/java/org/opendaylight/protocol/bgp/rib/mock/BGPMock.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.io.Closeable;
  11 import java.util.Arrays;
  12 import java.util.Iterator;
  13 import java.util.List;
  14
  15 import javax.annotation.concurrent.GuardedBy;
  16 import javax.annotation.concurrent.ThreadSafe;
  17
  18 import org.opendaylight.protocol.bgp.parser.BGPError;
  19 import org.opendaylight.protocol.bgp.parser.BGPSessionListener;
  20 import org.opendaylight.protocol.bgp.parser.impl.BGPMessageFactoryImpl;
  21 import org.opendaylight.protocol.bgp.parser.spi.MessageRegistry;
  22 import org.opendaylight.protocol.bgp.rib.impl.BGP;
  23 import org.opendaylight.protocol.concepts.ListenerRegistration;
  24 import org.opendaylight.protocol.framework.DeserializerException;
  25 import org.opendaylight.protocol.framework.DocumentedException;
  26 import org.opendaylight.protocol.framework.ProtocolMessageFactory;
  27 import org.opendaylight.protocol.framework.ReconnectStrategy;
  28 import org.opendaylight.protocol.util.ByteArray;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130918.NotifyBuilder;
  30 import org.opendaylight.yangtools.yang.binding.Notification;
  31
  32 import com.google.common.collect.Lists;
  33 import com.google.common.eventbus.EventBus;
  34
  35 /**
  36  *
  37  * Mock implementation of {@link BGP}.
  38  *
  39  */
  40 @ThreadSafe
  41 public final class BGPMock implements BGP, Closeable {
  42         static final Notification connectionLostMagicMessage = new NotifyBuilder().setErrorCode(BGPError.CEASE.getCode()).build();
  43
  44         @GuardedBy("this")
  45         private final List<byte[]> allPreviousByteMessages;
  46         private final List<Notification> allPreviousBGPMessages;
  47         private final EventBus eventBus;
  48
  49         @GuardedBy("this")
  50         private final List<EventBusRegistration> openRegistrations = Lists.newLinkedList();
  51
  52         public BGPMock(final EventBus eventBus, final MessageRegistry registry, final List<byte[]> bgpMessages) {
  53                 this.allPreviousByteMessages = Lists.newLinkedList(bgpMessages);
  54                 this.eventBus = eventBus;
  55                 this.allPreviousBGPMessages = this.parsePrevious(registry, this.allPreviousByteMessages);
  56         }
  57
  58         private List<Notification> parsePrevious(final MessageRegistry registry, final List<byte[]> msgs) {
  59                 final List<Notification> messages = Lists.newArrayList();
  60                 final ProtocolMessageFactory<Notification> parser = new BGPMessageFactoryImpl(registry);
  61                 try {
  62                         for (final byte[] b : msgs) {
  63
  64                                 final byte[] body = ByteArray.cutBytes(b, 1);
  65
  66                                 messages.add(parser.parse(body));
  67                         }
  68                 } catch (final DeserializerException e) {
  69                         e.printStackTrace();
  70                 } catch (final DocumentedException e) {
  71                         e.printStackTrace();
  72                 }
  73                 return messages;
  74         }
  75
  76         /**
  77          * @param listener BGPListener
  78          * @return ListenerRegistration
  79          */
  80         @Override
  81         public synchronized ListenerRegistration<BGPSessionListener> registerUpdateListener(final BGPSessionListener listener,
  82                         final ReconnectStrategy strategy) {
  83                 return EventBusRegistration.createAndRegister(this.eventBus, listener, this.allPreviousBGPMessages);
  84         }
  85
  86         public synchronized void insertConnectionLostEvent() {
  87                 this.insertMessage(connectionLostMagicMessage);
  88         }
  89
  90         public synchronized void insertMessages(final List<Notification> messages) {
  91                 for (final Notification message : messages) {
  92                         this.insertMessage(message);
  93                 }
  94         }
  95
  96         private synchronized void insertMessage(final Notification message) {
  97                 this.allPreviousBGPMessages.add(message);
  98                 this.eventBus.post(message);
  99         }
 100
 101         @Override
 102         public synchronized void close() {
 103                 // unregister all EventBusRegistration instances
 104                 for (final EventBusRegistration registration : this.openRegistrations) {
 105                         registration.close();
 106                 }
 107                 this.openRegistrations.clear();
 108         }
 109
 110         public boolean isMessageListSame(final List<byte[]> newMessages) {
 111                 if (this.allPreviousBGPMessages.size() != newMessages.size()) {
 112                         return false;
 113                 }
 114                 final Iterator<byte[]> i1 = this.allPreviousByteMessages.iterator();
 115                 final Iterator<byte[]> i2 = this.allPreviousByteMessages.iterator();
 116                 for (int i = 0; i < this.allPreviousBGPMessages.size(); i++) {
 117                         if (!Arrays.equals(i1.next(), i2.next())) {
 118                                 return false;
 119                         }
 120                 }
 121                 return true;
 122         }
 123
 124         public EventBus getEventBus() {
 125                 return this.eventBus;
 126         }
 127 }