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    1   /**
    2    * Licensed to the Apache Software Foundation (ASF) under one
    3    * or more contributor license agreements.  See the NOTICE file
    4    * distributed with this work for additional information
    5    * regarding copyright ownership.  The ASF licenses this file
    6    * to you under the Apache License, Version 2.0 (the
    7    * "License"); you may not use this file except in compliance
    8    * with the License.  You may obtain a copy of the License at
    9    *
    10   *   http://www.apache.org/licenses/LICENSE-2.0
    11   *
    12   * Unless required by applicable law or agreed to in writing,
    13   * software distributed under the License is distributed on an
    14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15   * KIND, either express or implied.  See the License for the
    16   * specific language governing permissions and limitations
    17   * under the License.
    18   */
    19  package org.apache.mina.api;
    20
    21  import org.slf4j.Logger;
    22  import org.slf4j.LoggerFactory;
    23
    24  /**
    25   * A convenient {@link IoHandler} implementation to be sub-classed for easier {@link IoHandler} implementation.
    26   *
    27   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    28   */
    29  public abstract class AbstractIoHandler implements IoHandler {
    30
    31      private static final Logger LOG = LoggerFactory.getLogger(AbstractIoHandler.class);
    32
    33      /**
    34       * {@inheritDoc}
    35       */
    36      @Override
    37      public void sessionOpened(final IoSession session) {
    38      }
    39
    40      /**
    41       * {@inheritDoc}
    42       */
    43      @Override
    44      public void sessionClosed(final IoSession session) {
    45      }
    46
    47      /**
    48       * {@inheritDoc}
    49       */
    50      @Override
    51      public void sessionIdle(final IoSession session, final IdleStatus status) {
    52      }
    53
    54      /**
    55       * {@inheritDoc}
    56       */
    57      @Override
    58      public void messageReceived(final IoSession session, final Object message) {
    59      }
    60
    61      /**
    62       * {@inheritDoc}
    63       */
    64      @Override
    65      public void messageSent(final IoSession session, final Object message) {
    66      }
    67
    68      /**
    69       * {@inheritDoc}
    70       */
    71      @Override
    72      public void serviceActivated(final IoService service) {
    73      }
    74
    75      /**
    76       * {@inheritDoc}
    77       */
    78      @Override
    79      public void serviceInactivated(final IoService service) {
    80      }
    81
    82      /**
    83       * {@inheritDoc}
    84       */
    85      @Override
    86      public void exceptionCaught(final IoSession session, final Exception cause) {
    87          LOG.error("Unexpected exception, we close the session : ", cause);
    88          session.close(true);
    89      }
    90  }