org.uiautomation.ios.server.utils.hack.TimeSpeeder.java Source code

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Here is the source code for org.uiautomation.ios.server.utils.hack.TimeSpeeder.java

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/*
 * Copyright 2012 ios-driver committers.
 * 
 * Licensed 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.uiautomation.ios.server.utils.hack;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.logging.Logger;

import org.openqa.selenium.WebDriverException;

public class TimeSpeeder implements HorribleHack {

    private static final Logger log = Logger.getLogger(TimeSpeeder.class.getName());

    private final static TimeSpeeder INSTANCE = new TimeSpeeder();
    private Thread t;
    private volatile boolean active = false;
    private volatile boolean on = true;

    public static TimeSpeeder getInstance() {
        return INSTANCE;
    }

    private synchronized void setActive(boolean active) {
        this.active = active;
    }

    public synchronized boolean isActive() {
        return active;
    }

    /**
     * if the time goes faster on the computer, needs to compensate 
     * for the timeout to have something close to what the use wants.
     * @return
     */
    public synchronized float getSecondDuration() {
        if (isActive()) {
            return 300 / 23;
        } else {
            return 1;
        }
    }

    public void start() {
        if (on) {
            setActive(true);
            t = new Thread(new Runnable() {

                public void run() {
                    try {
                        speedTime();
                    } catch (Exception ignore) {

                    }
                }
            });
            t.start();
        }
    }

    public void stop() {
        if (isActive()) {
            setActive(false);
            t.interrupt();
        }

    }

    private void speedTime() throws Exception {
        log.info("Speeding time");
        long time = System.currentTimeMillis();
        int i = 0;
        int delta = 1000;
        while (isActive()) {
            i++;
            Thread.sleep(50);
            long newTime = time + (i * delta);
            Date d = new Date(newTime);
            List<String> c = new ArrayList<String>();
            c.add("sudo");
            c.add("/bin/date");
            // TODO freynaud
            c.add(get(d.getHours()) + get(d.getMinutes()) + "." + get(d.getSeconds()));
            ProcessBuilder builder = new ProcessBuilder(c);
            Process p = builder.start();
            int exit = p.waitFor();
            if (exit != 0) {
                throw new WebDriverException("couldn't set time" + c);
            }
        }
    }

    private static String get(int o) {
        return o < 10 ? "0" + o : "" + o;
    }

    public void activate() {
        this.on = true;

    }

    public void desactivate() {
        this.on = false;

    }
}