eu.stratosphere.nephele.jobmanager.web.SetupInfoServlet.java Source code

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Here is the source code for eu.stratosphere.nephele.jobmanager.web.SetupInfoServlet.java

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/**
 * 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 eu.stratosphere.nephele.jobmanager.web;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.jettison.json.JSONArray;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

import eu.stratosphere.nephele.configuration.Configuration;
import eu.stratosphere.nephele.configuration.GlobalConfiguration;
import eu.stratosphere.nephele.instance.AbstractInstance;
import eu.stratosphere.nephele.instance.InstanceConnectionInfo;
import eu.stratosphere.nephele.jobmanager.JobManager;

/**
 * A Servlet that displays the Configruation in the webinterface.
 * 
 */
public class SetupInfoServlet extends HttpServlet {

    /**
     * Serial UID for serialization interoperability.
     */
    private static final long serialVersionUID = 3704963598772630435L;

    /**
     * The log for this class.
     */
    private static final Log LOG = LogFactory.getLog(SetupInfoServlet.class);

    private Configuration globalC;
    private JobManager jobmanager;

    public SetupInfoServlet(JobManager jm) {
        globalC = GlobalConfiguration.getConfiguration();
        this.jobmanager = jm;
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        resp.setStatus(HttpServletResponse.SC_OK);
        resp.setContentType("application/json");

        if ("globalConfiguration".equals(req.getParameter("get"))) {
            writeGlobalConfiguration(resp);
        } else if ("taskmanagers".equals(req.getParameter("get"))) {
            writeTaskmanagers(resp);
        }

    }

    private void writeGlobalConfiguration(HttpServletResponse resp) throws IOException {

        Set<String> keys = globalC.keySet();
        List<String> list = new ArrayList<String>(keys);
        Collections.sort(list);

        JSONObject obj = new JSONObject();
        for (String k : list) {
            try {
                obj.put(k, globalC.getString(k, ""));
            } catch (JSONException e) {
                LOG.warn("Json object creation failed", e);
            }
        }

        PrintWriter w = resp.getWriter();
        w.write(obj.toString());

    }

    private void writeTaskmanagers(HttpServletResponse resp) throws IOException {

        Set<InstanceConnectionInfo> keys = jobmanager.getInstances().keySet();
        List<InstanceConnectionInfo> list = new ArrayList<InstanceConnectionInfo>(keys);
        Collections.sort(list);

        JSONObject obj = new JSONObject();
        JSONArray array = new JSONArray();
        for (InstanceConnectionInfo k : list) {
            JSONObject objInner = new JSONObject();

            AbstractInstance instance = jobmanager.getInstances().get(k);
            // long time = new Date().getTime() - instance.getLastHeartBeat();

            try {
                objInner.put("inetAdress", k.getAddress());
                objInner.put("ipcPort", k.getIPCPort());
                objInner.put("dataPort", k.getDataPort());
                objInner.put("timeSinceLastHeartbeat", "?");
                objInner.put("slotsNumber", "?"); // instance.getNumberOfSlots()
                objInner.put("freeSlots", "?"); // instance.getNumberOfAvailableSlots());
                objInner.put("cpuCores", instance.getHardwareDescription().getNumberOfCPUCores());
                objInner.put("physicalMemory",
                        instance.getHardwareDescription().getSizeOfPhysicalMemory() / 1048576);
                objInner.put("freeMemory", instance.getHardwareDescription().getSizeOfFreeMemory() / 1048576);
                array.put(objInner);
            } catch (JSONException e) {
                LOG.warn("Json object creation failed", e);
            }

        }
        try {
            obj.put("taskmanagers", array);
        } catch (JSONException e) {
            LOG.warn("Json object creation failed", e);
        }

        PrintWriter w = resp.getWriter();
        w.write(obj.toString());
    }

}