com.controlj.green.istat.web.StatServlet.java Source code

Introduction

Here is the source code for com.controlj.green.istat.web.StatServlet.java

Source

/*
 * Copyright (c) 2010 Automated Logic Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.controlj.green.istat.web;

import com.controlj.green.addonsupport.InvalidConnectionRequestException;
import com.controlj.green.addonsupport.access.*;
import com.controlj.green.addonsupport.access.aspect.SetPoint;
import com.controlj.green.addonsupport.access.aspect.SetPointAdjust;
import com.controlj.green.addonsupport.access.util.Acceptors;
import org.jetbrains.annotations.NotNull;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Collection;

public class StatServlet extends HttpServlet {
    private static final DecimalFormat nFormat = new DecimalFormat("#.0");

    public StatServlet() {
        super();
    }

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

        resp.setHeader("Expires", "Wed, 01 Jan 2003 12:00:00 GMT");
        resp.setHeader("Cache-Control", "no-cache");
        ServletOutputStream out = resp.getOutputStream();

        try {
            writeStats(out, req.getParameter("loc"), req);
        } catch (Exception e) {
            resp.sendError(500, e.getMessage());
            //throw new ServletException(e);
        }

        /*
        out.println("[{ hsp:67,");
        out.println("csp: 74,");
        out.println("off: 1.5,");
        out.println("lim: 3.0,");
        out.println("current:71,");
        out.println("loc:'"+req.getParameter("loc")+"',");
        out.println("time:'"+new Date().getSeconds()+"'");
        out.println("}]");
        */
    }

    public void writeStats(final ServletOutputStream out, final String location, HttpServletRequest req)
            throws IOException, SystemException, ActionExecutionException, InvalidConnectionRequestException {
        final JSONArray arrayData = new JSONArray();

        SystemConnection connection = DirectAccess.getDirectAccess().getUserSystemConnection(req);

        connection.runReadAction(FieldAccessFactory.newFieldAccess(), new ReadAction() {
            public void execute(@NotNull SystemAccess access) throws Exception {
                Location eqLoc = access.getGeoRoot().getTree().resolve(location);
                Collection<SetPoint> setPoints = eqLoc.find(SetPoint.class, Acceptors.acceptAll());
                if (setPoints.isEmpty()) {
                    throw new Exception("Invalid location, no SetPoints here: " + location);
                }
                Collection<SetPointAdjust> setPointAdjusts = eqLoc.find(SetPointAdjust.class,
                        Acceptors.acceptAll());
                if (setPointAdjusts.isEmpty()) {
                    throw new Exception("Invalid location, no SetPointAdjusts here: " + location);
                }

                SetPoint setPoint = setPoints.iterator().next();
                SetPointAdjust setPointAdjust = setPointAdjusts.iterator().next();
                JSONObject next = new JSONObject();

                next.put("hsp", nFormat.format(setPoint.getEffectiveHeating()));
                next.put("csp", nFormat.format(setPoint.getEffectiveCooling()));
                next.put("current", nFormat.format(setPoint.getZoneTemp()));
                next.put("off", nFormat.format(setPointAdjust.getCoolingSetpointAdjust().getValue()));
                next.put("lim", nFormat.format(setPointAdjust.getCoolingSetpointAdjust().getMaximum()));
                next.put("loc", location);
                next.put("adjustable", setPointAdjust.getCoolingSetpointAdjust().isWritable());
                arrayData.put(next);
            }
        });

        try {
            PrintWriter writer = new PrintWriter(out);
            arrayData.write(writer);
            writer.flush();
        } catch (JSONException e) {
            Logging.LOGGER.println("Unexpected exception:");
            e.printStackTrace(Logging.LOGGER);
        }
    }

}