content: /*
   * 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.
   */
  package com.alibaba.metrics.rest.server.jersey;
  
  import com.alibaba.metrics.rest.server.NamedThreadFactory;
  import com.sun.net.httpserver.HttpContext;
  import com.sun.net.httpserver.HttpHandler;
  import com.sun.net.httpserver.HttpServer;
  import com.sun.net.httpserver.HttpsServer;
  import org.glassfish.jersey.jdkhttp.internal.LocalizationMessages;
  import org.glassfish.jersey.server.ContainerFactory;
  import org.glassfish.jersey.server.ResourceConfig;
  
  import javax.ws.rs.ProcessingException;
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.net.URI;
  import java.util.concurrent.Executor;
  import java.util.concurrent.LinkedBlockingDeque;
  import java.util.concurrent.ThreadPoolExecutor;
  import java.util.concurrent.TimeUnit;
  
  /**
   * FIXME a work around to support accepting request from customized address.
   * e.g. from localhost
   */
  public class HttpServerFactory {
  
      private HttpServerFactory() {
  
      }
  
      /**
       * Creates and starts the {@link HttpServer JDK HttpServer} with the Jersey
       * application deployed on the given {@link URI}, and bind to given address
       */
      public static HttpServer createHttpServer(final URI uri, final String bindingHost,
                                                final int corePoolSize, final int maxPoolSize,
                                                final long keepAliveTime, final int maxQueueSize,
                                                final ResourceConfig configuration)
              throws ProcessingException {
          final HttpHandlerContainer handler =
                  ContainerFactory.createContainer(HttpHandlerContainer.class, configuration);
          return createHttpServer(uri, bindingHost, handler, corePoolSize, maxPoolSize, keepAliveTime, maxQueueSize);
      }
  
      private static HttpServer createHttpServer(final URI uri, final String bindingHost,
                                                 final HttpHandlerContainer handler,
                                                 final int corePoolSize, final int maxPoolSize,
                                                 final long keepAliveTime, final int maxQueueSize) throws ProcessingException {
  
          if (uri == null) {
              throw new IllegalArgumentException(LocalizationMessages.ERROR_CONTAINER_URI_NULL());
          }
  
          final String scheme = uri.getScheme();
          if (!scheme.equalsIgnoreCase("http") && !scheme.equalsIgnoreCase("https")) {
              throw new IllegalArgumentException(LocalizationMessages.ERROR_CONTAINER_URI_SCHEME_UNKNOWN(uri));
          }
  
          final String path = uri.getPath();
          if (path == null) {
              throw new IllegalArgumentException(LocalizationMessages.ERROR_CONTAINER_URI_PATH_NULL(uri));
          } else if (path.length() == 0) {
              throw new IllegalArgumentException(LocalizationMessages.ERROR_CONTAINER_URI_PATH_EMPTY(uri));
          } else if (path.charAt(0) != '/') {
              throw new IllegalArgumentException(LocalizationMessages.ERROR_CONTAINER_URI_PATH_START(uri));
          }
  
          final int port = (uri.getPort() == -1) ? 80 : uri.getPort();
          final HttpServer server;
          try {
              server = (scheme.equalsIgnoreCase("http"))
                      ? HttpServer.create(new InetSocketAddress(bindingHost, port), 0)
                      : HttpsServer.create(new InetSocketAddress(bindingHost, port), 0);
          } catch (IOException ioe) {
              throw new ProcessingException(LocalizationMessages.ERROR_CONTAINER_EXCEPTION_IO(), ioe);
          }
  
          // TODO need to investigate the behavior when the queue if full, should we catch the exception?
          ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(corePoolSize, maxPoolSize, keepAliveTime,
                  TimeUnit.MILLISECONDS, new LinkedBlockingDeque<Runnable>(maxQueueSize),
                  new NamedThreadFactory("metrics-pool"));
          server.setExecutor(threadPoolExecutor);
          server.createContext(path, handler);
  
          final HttpServer wrapper = new HttpServer() {
  
              @Override
              public void bind(InetSocketAddress inetSocketAddress, int i) throws IOException {
                  server.bind(inetSocketAddress, i);
              }
  
              @Override
              public void start() {
                  server.start();
                  handler.onServerStart();
              }
  
              @Override
              public void setExecutor(Executor executor) {
                  server.setExecutor(executor);
              }
  
              @Override
              public Executor getExecutor() {
                  return server.getExecutor();
              }
  
              @Override
              public void stop(int i) {
                  handler.onServerStop();
                  server.stop(i);
              }
  
              @Override
              public HttpContext createContext(String s, HttpHandler httpHandler) {
                  return server.createContext(s, httpHandler);
              }
  
              @Override
              public HttpContext createContext(String s) {
                  return server.createContext(s);
              }
  
              @Override
              public void removeContext(String s) throws IllegalArgumentException {
                  server.removeContext(s);
              }
  
              @Override
              public void removeContext(HttpContext httpContext) {
                  server.removeContext(httpContext);
              }
  
              @Override
              public InetSocketAddress getAddress() {
                  return server.getAddress();
              }
          };
  
          wrapper.start();
  
          return wrapper;
      }
  }
  