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.BGPParsingException;
  21 import org.opendaylight.protocol.bgp.parser.BGPSessionListener;
  22 import org.opendaylight.protocol.bgp.parser.spi.MessageRegistry;
  23 import org.opendaylight.protocol.bgp.rib.impl.BGP;
  24 import org.opendaylight.protocol.concepts.ListenerRegistration;
  25 import org.opendaylight.protocol.framework.ReconnectStrategy;
  26 import org.opendaylight.protocol.framework.ReconnectStrategyFactory;
  27 import org.opendaylight.protocol.util.ByteArray;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.NotifyBuilder;
  29 import org.opendaylight.yangtools.yang.binding.Notification;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 import com.google.common.collect.Lists;
  34 import com.google.common.eventbus.EventBus;
  35
  36 /**
  37  *
  38  * Mock implementation of {@link BGP}.
  39  *
  40  */
  41 @ThreadSafe
  42 public final class BGPMock implements BGP, Closeable {
  43
  44         private static final Logger LOG = LoggerFactory.getLogger(BGPMock.class);
  45
  46         static final Notification CONNECTION_LOST_MAGIC_MSG = new NotifyBuilder().setErrorCode(BGPError.CEASE.getCode()).build();
  47
  48         @GuardedBy("this")
  49         private final List<byte[]> allPreviousByteMessages;
  50         private final List<Notification> allPreviousBGPMessages;
  51         private final EventBus eventBus;
  52
  53         @GuardedBy("this")
  54         private final List<EventBusRegistration> openRegistrations = Lists.newLinkedList();
  55
  56         public BGPMock(final EventBus eventBus, final MessageRegistry registry, final List<byte[]> bgpMessages) {
  57                 this.allPreviousByteMessages = Lists.newLinkedList(bgpMessages);
  58                 this.eventBus = eventBus;
  59                 this.allPreviousBGPMessages = this.parsePrevious(registry, this.allPreviousByteMessages);
  60         }
  61
  62         private List<Notification> parsePrevious(final MessageRegistry registry, final List<byte[]> msgs) {
  63                 final List<Notification> messages = Lists.newArrayList();
  64                 try {
  65                         for (final byte[] b : msgs) {
  66
  67                                 final byte[] body = ByteArray.cutBytes(b, 1);
  68
  69                                 messages.add(registry.parseMessage(body));
  70                         }
  71                 } catch (final BGPDocumentedException | BGPParsingException e) {
  72                         LOG.warn("Failed to parse message {}", e);
  73                 }
  74                 return messages;
  75         }
  76
  77         public synchronized void insertConnectionLostEvent() {
  78                 this.insertMessage(CONNECTION_LOST_MAGIC_MSG);
  79         }
  80
  81         public synchronized void insertMessages(final List<Notification> messages) {
  82                 for (final Notification message : messages) {
  83                         this.insertMessage(message);
  84                 }
  85         }
  86
  87         private synchronized void insertMessage(final Notification message) {
  88                 this.allPreviousBGPMessages.add(message);
  89                 this.eventBus.post(message);
  90         }
  91
  92         @Override
  93         public synchronized void close() {
  94                 // unregister all EventBusRegistration instances
  95                 for (final EventBusRegistration registration : this.openRegistrations) {
  96                         registration.close();
  97                 }
  98                 this.openRegistrations.clear();
  99         }
 100
 101         public boolean isMessageListSame(final List<byte[]> newMessages) {
 102                 if (this.allPreviousBGPMessages.size() != newMessages.size()) {
 103                         return false;
 104                 }
 105                 final Iterator<byte[]> i1 = this.allPreviousByteMessages.iterator();
 106                 final Iterator<byte[]> i2 = this.allPreviousByteMessages.iterator();
 107                 for (int i = 0; i < this.allPreviousBGPMessages.size(); i++) {
 108                         if (!Arrays.equals(i1.next(), i2.next())) {
 109                                 return false;
 110                         }
 111                 }
 112                 return true;
 113         }
 114
 115         public EventBus getEventBus() {
 116                 return this.eventBus;
 117         }
 118
 119         @Override
 120         public ListenerRegistration<BGPSessionListener> registerUpdateListener(
 121                         final BGPSessionListener listener,
 122                         final ReconnectStrategyFactory tcpStrategyFactory,
 123                         final ReconnectStrategy sessionStrategy) {
 124                 return EventBusRegistration.createAndRegister(this.eventBus, listener, this.allPreviousBGPMessages);
 125         }
 126 }