/*
* Copyright 2002-2009 the original author or authors.
*
* 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.springframework.flex.samples.simplefeed;
import java.util.Random;
import org.springframework.flex.messaging.MessageTemplate;
/**
*
* @author Christophe Coenraets
* @author Jeremy Grelle
*/
public class SimpleFeed {
private static FeedThread thread;
private final MessageTemplate template;
public SimpleFeed(MessageTemplate template) {
this.template = template;
}
public void start() {
if (thread == null) {
thread = new FeedThread(this.template);
thread.start();
}
}
public void stop() {
thread.running = false;
thread = null;
}
public static class FeedThread extends Thread {
public boolean running = false;
private final MessageTemplate template;
public FeedThread(MessageTemplate template) {
this.template = template;
}
@Override
public void run() {
this.running = true;
Random random = new Random();
double initialValue = 35;
double currentValue = 35;
double maxChange = initialValue * 0.005;
while (this.running) {
double change = maxChange - random.nextDouble() * maxChange * 2;
double newValue = currentValue + change;
if (currentValue < initialValue + initialValue * 0.15 && currentValue > initialValue - initialValue * 0.15) {
currentValue = newValue;
} else {
currentValue -= change;
}
this.template.send("simple-feed", new Double(currentValue));
System.out.println("" + currentValue);
try {
Thread.sleep(300);
} catch (InterruptedException e) {
}
}
}
}
}