/*
    * ====================================================================
    * 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;
  
  import java.io.IOException;
  
  import javax.net.ssl.SSLContext;
  
  import org.apache.http.annotation.Immutable;
  import org.apache.http.config.ConnectionConfig;
  import org.apache.http.impl.nio.reactor.AbstractIODispatch;
  import org.apache.http.nio.NHttpClientEventHandler;
  import org.apache.http.nio.NHttpConnectionFactory;
  import org.apache.http.nio.reactor.IOEventDispatch;
  import org.apache.http.nio.reactor.IOSession;
  import org.apache.http.nio.reactor.ssl.SSLSetupHandler;
  import org.apache.http.params.HttpParams;
  import org.apache.http.util.Args;
  
  /**
   * Default {@link IOEventDispatch} implementation that supports both plain (non-encrypted)
   * and SSL encrypted client side HTTP connections.
   *
   * @since 4.2
   */
  @SuppressWarnings("deprecation")
  @Immutable // provided injected dependencies are immutable
  public class DefaultHttpClientIODispatch
                      extends AbstractIODispatch<DefaultNHttpClientConnection> {
  
      private final NHttpClientEventHandler handler;
      private final NHttpConnectionFactory<DefaultNHttpClientConnection> connFactory;
  
      /**
       * Creates a new instance of this class to be used for dispatching I/O event
       * notifications to the given protocol handler.
       *
       * @param handler the client protocol handler.
       * @param connFactory HTTP client connection factory.
       */
      public DefaultHttpClientIODispatch(
              final NHttpClientEventHandler handler,
              final NHttpConnectionFactory<DefaultNHttpClientConnection> connFactory) {
          super();
          this.handler = Args.notNull(handler, "HTTP client handler");
          this.connFactory = Args.notNull(connFactory, "HTTP client connection factory");
      }
  
      /**
       * @deprecated (4.3) use {@link DefaultHttpClientIODispatch#DefaultHttpClientIODispatch(
       *  NHttpClientEventHandler, ConnectionConfig)}
       */
      @Deprecated
      public DefaultHttpClientIODispatch(
              final NHttpClientEventHandler handler,
              final HttpParams params) {
          this(handler, new DefaultNHttpClientConnectionFactory(params));
      }
  
      /**
       * @deprecated (4.3) use {@link DefaultHttpClientIODispatch#DefaultHttpClientIODispatch(
       *  NHttpClientEventHandler, SSLContext, SSLSetupHandler, ConnectionConfig)}
       */
      @Deprecated
      public DefaultHttpClientIODispatch(
              final NHttpClientEventHandler handler,
              final SSLContext sslcontext,
              final SSLSetupHandler sslHandler,
              final HttpParams params) {
          this(handler, new SSLNHttpClientConnectionFactory(sslcontext, sslHandler, params));
      }
  
      /**
       * @deprecated (4.3) use {@link DefaultHttpClientIODispatch#DefaultHttpClientIODispatch(
      *   NHttpClientEventHandler, SSLContext, ConnectionConfig)}
      */
     @Deprecated
     public DefaultHttpClientIODispatch(
             final NHttpClientEventHandler handler,
             final SSLContext sslcontext,
             final HttpParams params) {
         this(handler, sslcontext, null, params);
     }
 
     /**
      * @since 4.3
      */
     public DefaultHttpClientIODispatch(final NHttpClientEventHandler handler, final ConnectionConfig config) {
         this(handler, new DefaultNHttpClientConnectionFactory(config));
     }
 
     /**
      * @since 4.3
      */
     public DefaultHttpClientIODispatch(
             final NHttpClientEventHandler handler,
             final SSLContext sslcontext,
             final SSLSetupHandler sslHandler,
             final ConnectionConfig config) {
         this(handler, new SSLNHttpClientConnectionFactory(sslcontext, sslHandler, config));
     }
 
     /**
      * @since 4.3
      */
     public DefaultHttpClientIODispatch(
             final NHttpClientEventHandler handler,
             final SSLContext sslcontext,
             final ConnectionConfig config) {
         this(handler, new SSLNHttpClientConnectionFactory(sslcontext, null, config));
     }
 
     @Override
     protected DefaultNHttpClientConnection createConnection(final IOSession session) {
         return this.connFactory.createConnection(session);
     }
 
     @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);
         }
     }
 
 }