/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.http.impl.nio.client;
  
  import java.io.IOException;
  import java.nio.channels.CancelledKeyException;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.http.impl.nio.DefaultNHttpClientConnection;
  import org.apache.http.impl.nio.reactor.AbstractIODispatch;
  import org.apache.http.nio.NHttpClientEventHandler;
  import org.apache.http.nio.reactor.IOSession;
  
  class InternalIODispatch extends AbstractIODispatch<DefaultNHttpClientConnection> {
  
      private final Log log = LogFactory.getLog(InternalIODispatch.class);
  
      private final NHttpClientEventHandler handler;
  
      public InternalIODispatch(final NHttpClientEventHandler handler) {
          super();
          if (this.log.isDebugEnabled()) {
              this.handler = new InternalRequestExecutor(this.log, handler);
          } else {
              this.handler = handler;
          }
      }
  
      @Override
      protected DefaultNHttpClientConnection createConnection(final IOSession session) {
          // This method should never get called under normal circumstances
          // Connection object should be created by the connection manager
          // upon completion of the session request
          log.debug("Unexpected invocation of #createConnection");
          session.close();
          throw new CancelledKeyException();
      }
  
      @Override
      protected void onConnected(final DefaultNHttpClientConnection conn) {
          final Object attachment = conn.getContext().getAttribute(IOSession.ATTACHMENT_KEY);
          try {
              this.handler.connected(conn, attachment);
          } catch (final Exception ex) {
              this.handler.exception(conn, ex);
          }
      }
  
      @Override
      protected void onClosed(final DefaultNHttpClientConnection conn) {
          this.handler.closed(conn);
      }
  
      @Override
      protected void onException(final DefaultNHttpClientConnection conn, final IOException ex) {
          this.handler.exception(conn, ex);
      }
  
      @Override
      protected void onInputReady(final DefaultNHttpClientConnection conn) {
          conn.consumeInput(this.handler);
      }
  
      @Override
      protected void onOutputReady(final DefaultNHttpClientConnection conn) {
          conn.produceOutput(this.handler);
      }
  
      @Override
      protected void onTimeout(final DefaultNHttpClientConnection conn) {
          try {
              this.handler.timeout(conn);
          } catch (final Exception ex) {
             this.handler.exception(conn, ex);
         }
     }
 
 }