openflowjava/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/OFEncoder.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. 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
   9 package org.opendaylight.openflowjava.protocol.impl.core;
  10
  11 import io.netty.buffer.ByteBuf;
  12 import io.netty.channel.ChannelHandlerContext;
  13 import io.netty.handler.codec.MessageToByteEncoder;
  14 import io.netty.util.concurrent.Future;
  15 import org.opendaylight.openflowjava.protocol.impl.core.connection.MessageListenerWrapper;
  16 import org.opendaylight.openflowjava.protocol.impl.serialization.SerializationFactory;
  17 import org.opendaylight.openflowjava.statistics.CounterEventTypes;
  18 import org.opendaylight.openflowjava.statistics.StatisticsCounters;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowModInput;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 /**
  24  * Transforms OpenFlow Protocol messages to POJOs.
  25  *
  26  * @author michal.polkorab
  27  * @author timotej.kubas
  28  */
  29 public class OFEncoder extends MessageToByteEncoder<MessageListenerWrapper> {
  30
  31     private static final Logger LOG = LoggerFactory.getLogger(OFEncoder.class);
  32     private SerializationFactory serializationFactory;
  33     private final StatisticsCounters statisticsCounters;
  34
  35     public OFEncoder() {
  36         statisticsCounters = StatisticsCounters.getInstance();
  37         LOG.trace("Creating OFEncoder");
  38     }
  39
  40     @Override
  41     @SuppressWarnings("checkstyle:IllegalCatch")
  42     protected void encode(final ChannelHandlerContext ctx, final MessageListenerWrapper wrapper, final ByteBuf out)
  43             throws Exception {
  44         LOG.trace("Encoding");
  45         try {
  46             serializationFactory.messageToBuffer(wrapper.getMsg().getVersion(), out, wrapper.getMsg());
  47             if (wrapper.getMsg() instanceof FlowModInput) {
  48                 statisticsCounters.incrementCounter(CounterEventTypes.DS_FLOW_MODS_SENT);
  49             }
  50             statisticsCounters.incrementCounter(CounterEventTypes.DS_ENCODE_SUCCESS);
  51         } catch (RuntimeException e) {
  52             LOG.warn("Message serialization failed ", e);
  53             statisticsCounters.incrementCounter(CounterEventTypes.DS_ENCODE_FAIL);
  54             if (wrapper.getListener() != null) {
  55                 final Future<Void> newFailedFuture = ctx.newFailedFuture(e);
  56                 wrapper.getListener().operationComplete(newFailedFuture);
  57             }
  58             out.clear();
  59             return;
  60         }
  61     }
  62
  63     public void setSerializationFactory(final SerializationFactory serializationFactory) {
  64         this.serializationFactory = serializationFactory;
  65     }
  66
  67 }