/*
 * 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.phoenix.tracingwebapp.http;

import java.net.URL;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.BasicConfigurator;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.WebAppContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * tracing web app runner
 */
public final class Main extends Configured implements Tool {

  protected static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
  public static final String PHONIX_DBSERVER_PORT_KEY = "phoenix.dbserver.port";
  public static final int DEFAULT_DBSERVER_PORT = 2181;
  public static final String PHONIX_DBSERVER_HOST_KEY = "phoenix.dbserver.host";
  public static final String DEFAULT_DBSERVER_HOST = "localhost";
  public static final String TRACE_SERVER_HTTP_PORT_KEY = "phoenix.traceserver.http.port";
  public static final int DEFAULT_HTTP_PORT = 8864;
  public static final String TRACE_SERVER_HTTP_JETTY_HOME_KEY = "phoenix.traceserver.http.home";
  public static final String DEFAULT_HTTP_HOME = "/";
  public static final String DEFAULT_WEBAPP_DIR_LOCATION = "src/main/webapp";

  public static void main(String[] args) throws Exception {
    int ret = ToolRunner.run(HBaseConfiguration.create(), new Main(), args);
    System.exit(ret);
  }

  @Override
  public int run(String[] arg0) throws Exception {
    // logProcessInfo(getConf());
    final int port = getConf().getInt(TRACE_SERVER_HTTP_PORT_KEY, DEFAULT_HTTP_PORT);
    BasicConfigurator.configure();
    final String home = getConf().get(TRACE_SERVER_HTTP_JETTY_HOME_KEY, DEFAULT_HTTP_HOME);
    // setting up the embedded server
    Server server = new Server(port);
    WebAppContext root = new WebAppContext();

    URL webAppDir =
      Thread.currentThread().getContextClassLoader().getResource(DEFAULT_WEBAPP_DIR_LOCATION);
    if (webAppDir == null) {
      throw new RuntimeException(
        String.format("No %s directory was found into the JAR file", DEFAULT_WEBAPP_DIR_LOCATION));
    }

    root.setContextPath(home);
    root.setDescriptor(DEFAULT_WEBAPP_DIR_LOCATION + "/WEB-INF/web.xml");
    root.setResourceBase(webAppDir.toURI().toString());
    root.setParentLoaderPriority(true);
    server.setHandler(root);

    server.start();
    server.join();
    return 0;
  }
}
