/**
    *
    * 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.hadoop.hbase.http;
  
  import com.google.common.net.HostAndPort;
  
  import java.io.IOException;
  import java.net.URI;
  
  import javax.servlet.http.HttpServlet;
  
  import org.apache.hadoop.hbase.HBaseConfiguration;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.conf.Configuration;
  
  
  /**
   * Create a Jetty embedded server to answer http requests. The primary goal
   * is to serve up status information for the server.
   * There are three contexts:
   *   "/stacks/" -> points to stack trace
   *   "/static/" -> points to common static files (src/hbase-webapps/static)
   *   "/" -> the jsp server code from (src/hbase-webapps/<name>)
   */
  @InterfaceAudience.Private
  public class InfoServer {
    
    private static final String HBASE_APP_DIR = "hbase-webapps";
    private final org.apache.hadoop.hbase.http.HttpServer httpServer;
  
    /**
     * Create a status server on the given port.
     * The jsp scripts are taken from src/hbase-webapps/<code>name</code>.
     * @param name The name of the server
     * @param bindAddress address to bind to
     * @param port The port to use on the server
     * @param findPort whether the server should start at the given port and
     * increment by 1 until it finds a free port.
     * @throws IOException e
     */
    public InfoServer(String name, String bindAddress, int port, boolean findPort,
        final Configuration c)
    throws IOException {
      HttpConfig httpConfig = new HttpConfig(c);
      HttpServer.Builder builder =
        new org.apache.hadoop.hbase.http.HttpServer.Builder();
  
        builder.setName(name).addEndpoint(URI.create(httpConfig.getSchemePrefix() +
          HostAndPort.fromParts(bindAddress, port).toString()))
            .setAppDir(HBASE_APP_DIR).setFindPort(findPort).setConf(c);
        String logDir = System.getProperty("hbase.log.dir");
        if (logDir != null) {
          builder.setLogDir(logDir);
        }
      if (httpConfig.isSecure()) {
      builder.keyPassword(HBaseConfiguration.getPassword(c, "ssl.server.keystore.keypassword", null))
        .keyStore(c.get("ssl.server.keystore.location"),
          HBaseConfiguration.getPassword(c,"ssl.server.keystore.password", null),
          c.get("ssl.server.keystore.type", "jks"))
        .trustStore(c.get("ssl.server.truststore.location"),
          HBaseConfiguration.getPassword(c, "ssl.server.truststore.password", null),
          c.get("ssl.server.truststore.type", "jks"));
      }
      // Enable SPNEGO authentication
      if ("kerberos".equalsIgnoreCase(c.get(HttpServer.HTTP_UI_AUTHENTICATION, null))) {
        builder.setUsernameConfKey(HttpServer.HTTP_SPNEGO_AUTHENTICATION_PRINCIPAL_KEY)
          .setKeytabConfKey(HttpServer.HTTP_SPNEGO_AUTHENTICATION_KEYTAB_KEY)
          .setKerberosNameRulesKey(HttpServer.HTTP_SPNEGO_AUTHENTICATION_KRB_NAME_KEY)
          .setSignatureSecretFileKey(
              HttpServer.HTTP_AUTHENTICATION_SIGNATURE_SECRET_FILE_KEY)
          .setSecurityEnabled(true);
      }
      this.httpServer = builder.build();
    }
  
    public void addServlet(String name, String pathSpec,
            Class<? extends HttpServlet> clazz) {
        this.httpServer.addServlet(name, pathSpec, clazz);
    }
  
    public void setAttribute(String name, Object value) {
      this.httpServer.setAttribute(name, value);
   }
 
   public void start() throws IOException {
     this.httpServer.start();
   }
 
   @Deprecated
   public int getPort() {
     return this.httpServer.getPort();
   }
 
   public void stop() throws Exception {
     this.httpServer.stop();
   }
 
 }