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    1   /*
    2    * Copyright 2010 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * 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   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    35   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    36   *
    37   * @version $Rev: 2121 $, $Date: 2010-02-02 09:38:07 +0900 (Tue, 02 Feb 2010) $
    38   */
    39  public class ObjectEchoServerHandler extends SimpleChannelUpstreamHandler {
    40
    41      private static final Logger logger = Logger.getLogger(
    42              ObjectEchoServerHandler.class.getName());
    43
    44      private final AtomicLong transferredMessages = new AtomicLong();
    45
    46      public long getTransferredMessages() {
    47          return transferredMessages.get();
    48      }
    49
    50      @Override
    51      public void handleUpstream(
    52              ChannelHandlerContext ctx, ChannelEvent e) throws Exception {
    53          if (e instanceof ChannelStateEvent &&
    54              ((ChannelStateEvent) e).getState() != ChannelState.INTEREST_OPS) {
    55              logger.info(e.toString());
    56          }
    57          super.handleUpstream(ctx, e);
    58      }
    59
    60      @Override
    61      public void messageReceived(
    62              ChannelHandlerContext ctx, MessageEvent e) {
    63          // Echo back the received object to the client.
    64          transferredMessages.incrementAndGet();
    65          e.getChannel().write(e.getMessage());
    66      }
    67
    68      @Override
    69      public void exceptionCaught(
    70              ChannelHandlerContext ctx, ExceptionEvent e) {
    71          logger.log(
    72                  Level.WARNING,
    73                  "Unexpected exception from downstream.",
    74                  e.getCause());
    75          e.getChannel().close();
    76      }
    77  }