openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/connection/listener/SystemNotificationsListenerImpl.java

   1 /**
   2  * Copyright (c) 2015 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.openflowplugin.impl.connection.listener;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.Preconditions;
  12 import java.net.InetSocketAddress;
  13 import java.util.concurrent.Future;
  14 import java.util.concurrent.TimeUnit;
  15 import javax.annotation.Nonnull;
  16 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
  17 import org.opendaylight.openflowplugin.api.openflow.device.Xid;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoInputBuilder;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoOutput;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FeaturesReply;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.DisconnectEvent;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SwitchIdleEvent;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SystemNotificationsListener;
  24 import org.opendaylight.yangtools.yang.common.RpcError;
  25 import org.opendaylight.yangtools.yang.common.RpcResult;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  *
  31  */
  32 public class SystemNotificationsListenerImpl implements SystemNotificationsListener {
  33
  34     private final ConnectionContext connectionContext;
  35     private static final Logger LOG = LoggerFactory.getLogger(SystemNotificationsListenerImpl.class);
  36     @VisibleForTesting
  37     static final long MAX_ECHO_REPLY_TIMEOUT = 2000;
  38     private final long echoReplyTimeout;
  39
  40     public SystemNotificationsListenerImpl(@Nonnull final ConnectionContext connectionContext, long echoReplyTimeout) {
  41         this.connectionContext = Preconditions.checkNotNull(connectionContext);
  42         this.echoReplyTimeout = echoReplyTimeout;
  43     }
  44
  45     @Override
  46     public void onDisconnectEvent(final DisconnectEvent notification) {
  47         connectionContext.onConnectionClosed();
  48     }
  49
  50     @Override
  51     public void onSwitchIdleEvent(final SwitchIdleEvent notification) {
  52         new Thread(new Runnable() {
  53             @Override
  54             public void run() {
  55                 boolean shouldBeDisconnected = true;
  56
  57                 final InetSocketAddress remoteAddress = connectionContext.getConnectionAdapter().getRemoteAddress();
  58
  59                 if (ConnectionContext.CONNECTION_STATE.WORKING.equals(connectionContext.getConnectionState())) {
  60                     FeaturesReply features = connectionContext.getFeatures();
  61                     LOG.debug("Switch Idle state occured, node={}|auxId={}", remoteAddress, features.getAuxiliaryId());
  62                     connectionContext.changeStateToTimeouting();
  63                     EchoInputBuilder builder = new EchoInputBuilder();
  64                     builder.setVersion(features.getVersion());
  65                     Xid xid = new Xid(0L);
  66                     builder.setXid(xid.getValue());
  67
  68                     Future<RpcResult<EchoOutput>> echoReplyFuture = connectionContext.getConnectionAdapter().echo(builder.build());
  69
  70                     try {
  71                         RpcResult<EchoOutput> echoReplyValue = echoReplyFuture.get(echoReplyTimeout, TimeUnit.MILLISECONDS);
  72                         if (echoReplyValue.isSuccessful()) {
  73                             connectionContext.changeStateToWorking();
  74                             shouldBeDisconnected = false;
  75                         } else {
  76                             for (RpcError replyError : echoReplyValue.getErrors()) {
  77                                 Throwable cause = replyError.getCause();
  78                                 if (LOG.isWarnEnabled()) {
  79                                     LOG.warn("Received EchoReply from [{}] in TIMEOUTING state, Error:{}", remoteAddress, cause.getMessage());
  80                                 }
  81
  82                                 if (LOG.isTraceEnabled()) {
  83                                     LOG.trace("Received EchoReply from [{}] in TIMEOUTING state, Error:{}", remoteAddress, cause);
  84                                 }
  85
  86                             }
  87                         }
  88                     } catch (Exception e) {
  89                         if (LOG.isWarnEnabled()) {
  90                             LOG.warn("Exception while  waiting for echoReply from [{}] in TIMEOUTING state: {}", remoteAddress, e.getMessage());
  91                         }
  92
  93                         if (LOG.isTraceEnabled()) {
  94                             LOG.trace("Exception while  waiting for echoReply from [{}] in TIMEOUTING state: {}", remoteAddress, e);
  95                         }
  96
  97                     }
  98                 }
  99                 if (shouldBeDisconnected) {
 100                     connectionContext.closeConnection(true);
 101                 }
 102             }
 103         }).start();
 104     }
 105 }