/*
    * ====================================================================
    * 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.hc.core5.http.impl.bootstrap;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.util.concurrent.Future;
  
  import org.apache.hc.core5.annotation.Internal;
  import org.apache.hc.core5.concurrent.DefaultThreadFactory;
  import org.apache.hc.core5.concurrent.FutureCallback;
  import org.apache.hc.core5.function.Callback;
  import org.apache.hc.core5.function.Decorator;
  import org.apache.hc.core5.function.Resolver;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.ProtocolException;
  import org.apache.hc.core5.http.impl.DefaultAddressResolver;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.net.URIAuthority;
  import org.apache.hc.core5.reactor.ConnectionInitiator;
  import org.apache.hc.core5.reactor.DefaultConnectingIOReactor;
  import org.apache.hc.core5.reactor.IOEventHandlerFactory;
  import org.apache.hc.core5.reactor.IOReactorConfig;
  import org.apache.hc.core5.reactor.IOReactorService;
  import org.apache.hc.core5.reactor.IOReactorStatus;
  import org.apache.hc.core5.reactor.IOSession;
  import org.apache.hc.core5.reactor.IOSessionListener;
  import org.apache.hc.core5.util.Args;
  import org.apache.hc.core5.util.TimeValue;
  import org.apache.hc.core5.util.Timeout;
  
  /**
   * Protocol agnostic client side I/O session initiator.
   *
   * @since 5.0
   */
  public class AsyncRequester extends AbstractConnectionInitiatorBase implements IOReactorService {
  
      private final DefaultConnectingIOReactor ioReactor;
      private final Resolver<HttpHost, InetSocketAddress> addressResolver;
  
      @Internal
      public AsyncRequester(
              final IOEventHandlerFactory eventHandlerFactory,
              final IOReactorConfig ioReactorConfig,
              final Decorator<IOSession> ioSessionDecorator,
              final Callback<Exception> exceptionCallback,
              final IOSessionListener sessionListener,
              final Callback<IOSession> sessionShutdownCallback,
              final Resolver<HttpHost, InetSocketAddress> addressResolver) {
          this.ioReactor = new DefaultConnectingIOReactor(
                  eventHandlerFactory,
                  ioReactorConfig,
                  new DefaultThreadFactory("requester-dispatch", true),
                  ioSessionDecorator,
                  exceptionCallback,
                  sessionListener,
                  sessionShutdownCallback);
          this.addressResolver = addressResolver != null ? addressResolver : DefaultAddressResolver.INSTANCE;
      }
  
      @Override
      ConnectionInitiator getIOReactor() {
          return ioReactor;
      }
  
      public Future<IOSession> requestSession(
              final HttpHost host,
              final Timeout timeout,
              final Object attachment,
              final FutureCallback<IOSession> callback) {
          Args.notNull(host, "Host");
          Args.notNull(timeout, "Timeout");
         return connect(host, addressResolver.resolve(host), null, timeout, attachment, callback);
     }
 
     @Override
     public void start() {
         ioReactor.start();
     }
 
     @Override
     public IOReactorStatus getStatus() {
         return ioReactor.getStatus();
     }
 
     @Override
     public void initiateShutdown() {
         ioReactor.initiateShutdown();
     }
 
     @Override
     public void awaitShutdown(final TimeValue waitTime) throws InterruptedException {
         ioReactor.awaitShutdown(waitTime);
     }
 
     @Override
     public void close(final CloseMode closeMode) {
         ioReactor.close(closeMode);
     }
 
     @Override
     public void close() throws IOException {
         ioReactor.close();
     }
 
     @Internal
     protected static HttpHost defaultTarget(final HttpRequest request) throws ProtocolException {
         final String scheme = request.getScheme();
         final URIAuthority authority = request.getAuthority();
         if (authority == null) {
             throw new ProtocolException("Request authority not specified");
         }
         return new HttpHost(scheme, authority);
     }
 
 }