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 org.apache.asterix.clienthelper.commands;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.HttpURLConnection;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.asterix.clienthelper.Args;
  
  public abstract class RemoteCommand extends ClientCommand {
  
      public static final int MAX_CONNECTION_TIMEOUT_SECS = 60;
  
      protected enum Method {
          GET,
          POST
      }
  
      protected final String hostPort;
  
      public RemoteCommand(Args args) {
          super(args);
          hostPort = args.getClusterAddress() + ":" + args.getClusterPort();
      }
  
      @SuppressWarnings("squid:S1166") // log or rethrow exception
      protected int tryConnect(String path, Method method) throws MalformedURLException {
          try {
              HttpURLConnection conn = openConnection(path, method);
              return conn.getResponseCode();
          } catch (IOException e) {
              return -1;
          }
      }
  
      protected int tryGet(String path) throws MalformedURLException {
          return tryConnect(path, Method.GET);
      }
  
      protected int tryPost(String path) throws MalformedURLException {
          return tryConnect(path, Method.POST);
      }
  
      protected InputStream openAsStream(String path, Method method) throws IOException {
          return openConnection(path, method).getInputStream();
      }
  
      protected HttpURLConnection openConnection(String path, Method method) throws IOException {
          URL url = new URL("http://" + hostPort + "/" + path);
          HttpURLConnection conn = (HttpURLConnection) url.openConnection();
          final int timeoutMillis =
                  (int) TimeUnit.SECONDS.toMillis(Math.max(MAX_CONNECTION_TIMEOUT_SECS, args.getTimeoutSecs()));
          conn.setConnectTimeout(timeoutMillis);
          conn.setReadTimeout(timeoutMillis);
          conn.setRequestMethod(method.name());
          conn.setRequestProperty("Connection", "close");
          return conn;
      }
  }
  