/*
    * ====================================================================
    * 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.nio.protocol;
  
  import java.io.IOException;
  
  import org.apache.http.ConnectionReuseStrategy;
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpResponse;
  import org.apache.http.HttpStatus;
  import org.apache.http.annotation.Immutable;
  import org.apache.http.nio.NHttpConnection;
  import org.apache.http.nio.util.ByteBufferAllocator;
  import org.apache.http.params.HttpParams;
  import org.apache.http.protocol.HttpProcessor;
  import org.apache.http.util.Args;
  
  /**
   * @since 4.0
   *
   * @deprecated (4.2) do not use
   */
  @Deprecated
  @Immutable // provided injected dependencies are immutable
  public abstract class NHttpHandlerBase {
  
      protected static final String CONN_STATE = "http.nio.conn-state";
  
      protected final HttpProcessor httpProcessor;
      protected final ConnectionReuseStrategy connStrategy;
      protected final ByteBufferAllocator allocator;
      protected final HttpParams params;
  
      protected EventListener eventListener;
  
      public NHttpHandlerBase(
              final HttpProcessor httpProcessor,
              final ConnectionReuseStrategy connStrategy,
              final ByteBufferAllocator allocator,
              final HttpParams params) {
          super();
          Args.notNull(httpProcessor, "HTTP processor");
          Args.notNull(connStrategy, "Connection reuse strategy");
          Args.notNull(allocator, "ByteBuffer allocator");
          Args.notNull(params, "HTTP parameters");
          this.httpProcessor = httpProcessor;
          this.connStrategy = connStrategy;
          this.allocator = allocator;
          this.params = params;
      }
  
      public HttpParams getParams() {
          return this.params;
      }
  
      public void setEventListener(final EventListener eventListener) {
          this.eventListener = eventListener;
      }
  
      protected void closeConnection(final NHttpConnection conn, final Throwable cause) {
          try {
              // Try to close it nicely
              conn.close();
          } catch (final IOException ex) {
              try {
                  // Just shut the damn thing down
                  conn.shutdown();
              } catch (final IOException ignore) {
              }
          }
      }
  
      protected void shutdownConnection(final NHttpConnection conn, final Throwable cause) {
          try {
             conn.shutdown();
         } catch (final IOException ignore) {
         }
     }
 
     protected void handleTimeout(final NHttpConnection conn) {
         try {
             if (conn.getStatus() == NHttpConnection.ACTIVE) {
                 conn.close();
                 if (conn.getStatus() == NHttpConnection.CLOSING) {
                     // Give the connection some grace time to
                     // close itself nicely
                     conn.setSocketTimeout(250);
                 }
                 if (this.eventListener != null) {
                     this.eventListener.connectionTimeout(conn);
                 }
             } else {
                 conn.shutdown();
             }
         } catch (final IOException ignore) {
         }
     }
 
     protected boolean canResponseHaveBody(
             final HttpRequest request, final HttpResponse response) {
 
         if (request != null && "HEAD".equalsIgnoreCase(request.getRequestLine().getMethod())) {
             return false;
         }
 
         final int status = response.getStatusLine().getStatusCode();
         return status >= HttpStatus.SC_OK
             && status != HttpStatus.SC_NO_CONTENT
             && status != HttpStatus.SC_NOT_MODIFIED
             && status != HttpStatus.SC_RESET_CONTENT;
     }
 
 }