/*
    * ====================================================================
    * 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.testserver;
  
  import java.io.IOException;
  import java.net.SocketException;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.http.ConnectionClosedException;
  import org.apache.http.ExceptionLogger;
  import org.apache.http.impl.nio.DefaultNHttpServerConnection;
  import org.apache.http.impl.nio.bootstrap.HttpServer;
  import org.apache.http.impl.nio.bootstrap.ServerBootstrap;
  import org.apache.http.impl.nio.reactor.IOReactorConfig;
  import org.apache.http.nio.NHttpConnectionFactory;
  import org.apache.http.nio.protocol.HttpAsyncExpectationVerifier;
  import org.apache.http.nio.protocol.HttpAsyncRequestHandler;
  import org.apache.http.nio.protocol.UriHttpAsyncRequestHandlerMapper;
  import org.apache.http.nio.reactor.ListenerEndpoint;
  import org.apache.http.protocol.HttpProcessor;
  import org.apache.http.util.Asserts;
  
  public class HttpServerNio {
  
      private final UriHttpAsyncRequestHandlerMapper reqistry;
      private volatile HttpAsyncExpectationVerifier expectationVerifier;
      private volatile NHttpConnectionFactory<DefaultNHttpServerConnection> connectionFactory;
      private volatile HttpProcessor httpProcessor;
      private volatile int timeout;
  
      private volatile HttpServer server;
  
      public HttpServerNio() {
          super();
          this.reqistry = new UriHttpAsyncRequestHandlerMapper();
      }
  
      public int getTimeout() {
          return this.timeout;
      }
  
      public void setTimeout(final int timeout) {
          this.timeout = timeout;
      }
  
      public void registerHandler(
              final String pattern,
              final HttpAsyncRequestHandler handler) {
          this.reqistry.register(pattern, handler);
      }
  
      public void setExpectationVerifier(final HttpAsyncExpectationVerifier expectationVerifier) {
          this.expectationVerifier = expectationVerifier;
      }
  
      public void setConnectionFactory(final NHttpConnectionFactory<DefaultNHttpServerConnection> connectionFactory) {
          this.connectionFactory = connectionFactory;
      }
  
      public void setHttpProcessor(final HttpProcessor httpProcessor) {
          this.httpProcessor = httpProcessor;
      }
  
      public ListenerEndpoint getListenerEndpoint() {
          final HttpServer local = this.server;
          if (local != null) {
              return this.server.getEndpoint();
          } else {
              throw new IllegalStateException("Server not running");
          }
      }
  
     public void start() throws IOException {
         Asserts.check(this.server == null, "Server already running");
         this.server = ServerBootstrap.bootstrap()
                 .setIOReactorConfig(IOReactorConfig.custom()
                         .setSoTimeout(this.timeout)
                         .build())
                 .setServerInfo("TEST-SERVER/1.1")
                 .setConnectionFactory(connectionFactory)
                 .setExceptionLogger(new SimpleExceptionLogger())
                 .setExpectationVerifier(this.expectationVerifier)
                 .setHttpProcessor(this.httpProcessor)
                 .setHandlerMapper(this.reqistry)
                 .create();
         this.server.start();
     }
 
     public void shutdown() {
         final HttpServer local = this.server;
         this.server = null;
         if (local != null) {
             local.shutdown(5, TimeUnit.SECONDS);
         }
     }
 
     static class SimpleExceptionLogger implements ExceptionLogger {
 
         private final Log log = LogFactory.getLog(HttpServer.class);
 
         @Override
         public void log(final Exception ex) {
             if (ex instanceof ConnectionClosedException) {
                 this.log.debug(ex.getMessage());
             } else if (ex instanceof SocketException) {
                 this.log.debug(ex.getMessage());
             } else {
                 this.log.error(ex.getMessage(), ex);
             }
         }
     }
 
 }