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