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.message.BGPNotificationMessage;
  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.yangtools.yang.binding.Notification;
  30
  31 import com.google.common.collect.Lists;
  32 import com.google.common.eventbus.EventBus;
  33
  34 /**
  35  *
  36  * Mock implementation of {@link BGP}.
  37  *
  38  */
  39 @ThreadSafe
  40 public final class BGPMock implements BGP, Closeable {
  41         static final Notification connectionLostMagicMessage = new BGPNotificationMessage(BGPError.CEASE);
  42
  43         @GuardedBy("this")
  44         private final List<byte[]> allPreviousByteMessages;
  45         private final List<Notification> allPreviousBGPMessages;
  46         private final EventBus eventBus;
  47         @GuardedBy("this")
  48         private final List<EventBusRegistration> openRegistrations = Lists.newLinkedList();
  49
  50         public BGPMock(final EventBus eventBus, final List<byte[]> bgpMessages) {
  51                 this.allPreviousByteMessages = Lists.newLinkedList(bgpMessages);
  52                 this.eventBus = eventBus;
  53                 this.allPreviousBGPMessages = this.parsePrevious(this.allPreviousByteMessages);
  54         }
  55
  56         private List<Notification> parsePrevious(final List<byte[]> msgs) {
  57                 final List<Notification> messages = Lists.newArrayList();
  58                 final ProtocolMessageFactory<Notification> parser = new BGPMessageFactoryImpl();
  59                 try {
  60                         for (final byte[] b : msgs) {
  61
  62                                 final byte[] body = ByteArray.cutBytes(b, 1);
  63
  64                                 messages.addAll(parser.parse(body));
  65                         }
  66                 } catch (final DeserializerException e) {
  67                         e.printStackTrace();
  68                 } catch (final DocumentedException e) {
  69                         e.printStackTrace();
  70                 }
  71                 return messages;
  72         }
  73
  74         /**
  75          * @param listener BGPListener
  76          * @return ListenerRegistration
  77          */
  78         @Override
  79         public synchronized ListenerRegistration<BGPSessionListener> registerUpdateListener(final BGPSessionListener listener,
  80                         final ReconnectStrategy strategy) {
  81                 return EventBusRegistration.createAndRegister(this.eventBus, listener, this.allPreviousBGPMessages);
  82         }
  83
  84         public synchronized void insertConnectionLostEvent() {
  85                 this.insertMessage(connectionLostMagicMessage);
  86         }
  87
  88         public synchronized void insertMessages(final List<Notification> messages) {
  89                 for (final Notification message : messages) {
  90                         this.insertMessage(message);
  91                 }
  92         }
  93
  94         private synchronized void insertMessage(final Notification message) {
  95                 this.allPreviousBGPMessages.add(message);
  96                 this.eventBus.post(message);
  97         }
  98
  99         @Override
 100         public synchronized void close() {
 101                 // unregister all EventBusRegistration instances
 102                 for (final EventBusRegistration registration : this.openRegistrations) {
 103                         registration.close();
 104                 }
 105                 this.openRegistrations.clear();
 106         }
 107
 108         public boolean isMessageListSame(final List<byte[]> newMessages) {
 109                 if (this.allPreviousBGPMessages.size() != newMessages.size()) {
 110                         return false;
 111                 }
 112                 final Iterator<byte[]> i1 = this.allPreviousByteMessages.iterator();
 113                 final Iterator<byte[]> i2 = this.allPreviousByteMessages.iterator();
 114                 for (int i = 0; i < this.allPreviousBGPMessages.size(); i++) {
 115                         if (!Arrays.equals(i1.next(), i2.next())) {
 116                                 return false;
 117                         }
 118                 }
 119                 return true;
 120         }
 121
 122         public EventBus getEventBus() {
 123                 return this.eventBus;
 124         }
 125 }