/*
    * 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.chukwa.datacollection.adaptor;
  
  import java.io.IOException;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import junit.framework.TestCase;
  
  import org.apache.hadoop.chukwa.Chunk;
  import org.apache.hadoop.chukwa.datacollection.ChunkReceiver;
  import org.json.simple.JSONObject;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.mortbay.jetty.Server;
  import org.mortbay.jetty.servlet.Context;
  import org.mortbay.jetty.servlet.ServletHolder;
  
  public class TestRestAdaptor extends TestCase implements ChunkReceiver {
  
    private Server jettyServer = null;
    private JSONObject metricsMap = new JSONObject();
    private static String args = "http://localhost:9090/metrics/instrumentation/data 2";
    private static long offset = 0;
  
    @Before
    public void setUp() throws Exception {
      metricsMap.put("FreeSpace", "10GB");
      metricsMap.put("UsedSpace", "90GB");
      metricsMap.put("maps_killed", "20");
  
      jettyServer = new Server(9090);
      Context root = new Context(jettyServer, "/metrics/instrumentation/data",
          Context.SESSIONS);
      root.addServlet(new ServletHolder(new RestServlet()), "/*");
      System.out.println(" Rest Server starting..");
  
      jettyServer.start();
      jettyServer.setStopAtShutdown(true);
    }
  
    @Test
    public void testMessageReceivedOk() throws Exception {
      RestAdaptor restAdaptor = new RestAdaptor();
      restAdaptor.parseArgs(args);
      restAdaptor.start("id", "TestRestAdaptor", 0, this);
      Thread.sleep(2000); // wait for processing
    }
  
    @Override
    public void add(Chunk event) throws InterruptedException {
      offset += event.getData().length;
      assertTrue(event.getDataType().equals("TestRestAdaptor"));
      assertEquals(event.getSeqID(), offset);
      assertTrue(metricsMap.toString().equals(new String(event.getData())));
    }
  
    @After
    public void tearDown() throws Exception {
      if (jettyServer != null) {
        jettyServer.stop();
      }
    }
  
    private class RestServlet extends HttpServlet {
      private static final long serialVersionUID = -8007387020169769539L;
  
      protected void doGet(HttpServletRequest request,
          HttpServletResponse response) throws ServletException, IOException {
        response.getWriter().write(metricsMap.toString());
      }
    }
  }