View Javadoc

    1   /*
    2    * Copyright 2012 The Netty Project
    3    *
    4    * The Netty Project licenses this file to you under the Apache License,
    5    * version 2.0 (the "License"); you may not use this file except in compliance
    6    * with the License. You may obtain a copy of the License at:
    7    *
    8    *   http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.example.objectecho;
    17
    18  import java.util.concurrent.atomic.AtomicLong;
    19  import java.util.logging.Level;
    20  import java.util.logging.Logger;
    21
    22  import org.jboss.netty.channel.ChannelEvent;
    23  import org.jboss.netty.channel.ChannelHandlerContext;
    24  import org.jboss.netty.channel.ChannelState;
    25  import org.jboss.netty.channel.ChannelStateEvent;
    26  import org.jboss.netty.channel.ExceptionEvent;
    27  import org.jboss.netty.channel.MessageEvent;
    28  import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
    29
    30  /**
    31   * Handles both client-side and server-side handler depending on which
    32   * constructor was called.
    33   */
    34  public class ObjectEchoServerHandler extends SimpleChannelUpstreamHandler {
    35
    36      private static final Logger logger = Logger.getLogger(
    37              ObjectEchoServerHandler.class.getName());
    38
    39      private final AtomicLong transferredMessages = new AtomicLong();
    40
    41      public long getTransferredMessages() {
    42          return transferredMessages.get();
    43      }
    44
    45      @Override
    46      public void handleUpstream(
    47              ChannelHandlerContext ctx, ChannelEvent e) throws Exception {
    48          if (e instanceof ChannelStateEvent &&
    49              ((ChannelStateEvent) e).getState() != ChannelState.INTEREST_OPS) {
    50              logger.info(e.toString());
    51          }
    52          super.handleUpstream(ctx, e);
    53      }
    54
    55      @Override
    56      public void messageReceived(
    57              ChannelHandlerContext ctx, MessageEvent e) {
    58          // Echo back the received object to the client.
    59          transferredMessages.incrementAndGet();
    60          e.getChannel().write(e.getMessage());
    61      }
    62
    63      @Override
    64      public void exceptionCaught(
    65              ChannelHandlerContext ctx, ExceptionEvent e) {
    66          logger.log(
    67                  Level.WARNING,
    68                  "Unexpected exception from downstream.",
    69                  e.getCause());
    70          e.getChannel().close();
    71      }
    72  }