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.BGPDocumentedException;
  19 import org.opendaylight.protocol.bgp.parser.BGPError;
  20 import org.opendaylight.protocol.bgp.parser.BGPMessageFactory;
  21 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
  22 import org.opendaylight.protocol.bgp.parser.BGPSessionListener;
  23 import org.opendaylight.protocol.bgp.parser.impl.BGPMessageFactoryImpl;
  24 import org.opendaylight.protocol.bgp.parser.spi.MessageRegistry;
  25 import org.opendaylight.protocol.bgp.rib.impl.BGP;
  26 import org.opendaylight.protocol.concepts.ListenerRegistration;
  27 import org.opendaylight.protocol.framework.ReconnectStrategy;
  28 import org.opendaylight.protocol.framework.ReconnectStrategyFactory;
  29 import org.opendaylight.protocol.util.ByteArray;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130918.NotifyBuilder;
  31 import org.opendaylight.yangtools.yang.binding.Notification;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 import com.google.common.collect.Lists;
  36 import com.google.common.eventbus.EventBus;
  37
  38 /**
  39  *
  40  * Mock implementation of {@link BGP}.
  41  *
  42  */
  43 @ThreadSafe
  44 public final class BGPMock implements BGP, Closeable {
  45
  46         private static final Logger LOG = LoggerFactory.getLogger(BGPMock.class);
  47
  48         static final Notification CONNECTION_LOST_MAGIC_MSG = new NotifyBuilder().setErrorCode(BGPError.CEASE.getCode()).build();
  49
  50         @GuardedBy("this")
  51         private final List<byte[]> allPreviousByteMessages;
  52         private final List<Notification> allPreviousBGPMessages;
  53         private final EventBus eventBus;
  54
  55         @GuardedBy("this")
  56         private final List<EventBusRegistration> openRegistrations = Lists.newLinkedList();
  57
  58         public BGPMock(final EventBus eventBus, final MessageRegistry registry, final List<byte[]> bgpMessages) {
  59                 this.allPreviousByteMessages = Lists.newLinkedList(bgpMessages);
  60                 this.eventBus = eventBus;
  61                 this.allPreviousBGPMessages = this.parsePrevious(registry, this.allPreviousByteMessages);
  62         }
  63
  64         private List<Notification> parsePrevious(final MessageRegistry registry, final List<byte[]> msgs) {
  65                 final List<Notification> messages = Lists.newArrayList();
  66                 final BGPMessageFactory parser = new BGPMessageFactoryImpl(registry);
  67                 try {
  68                         for (final byte[] b : msgs) {
  69
  70                                 final byte[] body = ByteArray.cutBytes(b, 1);
  71
  72                                 messages.add(parser.parse(body));
  73                         }
  74                 } catch (final BGPDocumentedException | BGPParsingException e) {
  75                         LOG.warn("Failed to parse message {}", e);
  76                 }
  77                 return messages;
  78         }
  79
  80         public synchronized void insertConnectionLostEvent() {
  81                 this.insertMessage(CONNECTION_LOST_MAGIC_MSG);
  82         }
  83
  84         public synchronized void insertMessages(final List<Notification> messages) {
  85                 for (final Notification message : messages) {
  86                         this.insertMessage(message);
  87                 }
  88         }
  89
  90         private synchronized void insertMessage(final Notification message) {
  91                 this.allPreviousBGPMessages.add(message);
  92                 this.eventBus.post(message);
  93         }
  94
  95         @Override
  96         public synchronized void close() {
  97                 // unregister all EventBusRegistration instances
  98                 for (final EventBusRegistration registration : this.openRegistrations) {
  99                         registration.close();
 100                 }
 101                 this.openRegistrations.clear();
 102         }
 103
 104         public boolean isMessageListSame(final List<byte[]> newMessages) {
 105                 if (this.allPreviousBGPMessages.size() != newMessages.size()) {
 106                         return false;
 107                 }
 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                 }
 115                 return true;
 116         }
 117
 118         public EventBus getEventBus() {
 119                 return this.eventBus;
 120         }
 121
 122         @Override
 123         public ListenerRegistration<BGPSessionListener> registerUpdateListener(
 124                         final BGPSessionListener listener,
 125                         final ReconnectStrategyFactory tcpStrategyFactory,
 126                         final ReconnectStrategy sessionStrategy) {
 127                 return EventBusRegistration.createAndRegister(this.eventBus, listener, this.allPreviousBGPMessages);
 128         }
 129 }