/*
* 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.myfaces.trinidaddemo.components.output.progessIndicator;
import org.apache.myfaces.trinidad.model.BoundedRangeModel;
import org.apache.myfaces.trinidad.model.DefaultBoundedRangeModel;
import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
*/
public class ProgressIndicatorBean implements Serializable {
protected volatile DefaultBoundedRangeModel __model;
protected volatile ProcessThread __processThread;
protected boolean finished = false;
public BoundedRangeModel getProgressModel() {
return __model;
}
public boolean isFinished() {
return finished;
}
public void beginProcess() {
if (null == __model) {
prepare();
}
}
public void endProcess() {
__processThread = null;
__model = null;
finished = false;
}
public void finishProcess() {
finished = true;
}
protected void prepare() {
__model = new DefaultBoundedRangeModel(-1, 125);
//pu: simulate asynchronous model updates on a different thread
__processThread = new ProcessThread(500, 0);
__processThread.start();
}
protected class ProcessThread extends Thread implements Serializable {
private long _updateIntervalFactor;
private long _updateValueFactor;
/**
* @param updateIntervalFactor - controls the speed of the thread
* @param updateValueFactor - The value by which the 'value' from the
* model should be incremented for every cycle. Randomizes the increment
* if updateValueFactor supplied is '0'.
*/
ProcessThread(long updateIntervalFactor, long updateValueFactor) {
_updateIntervalFactor = updateIntervalFactor;
_updateValueFactor = updateValueFactor;
}
@Override
public void run() {
try {
//pu: Be in indeterminate mode for some time to start with
sleep(3000);
//pu: Take care to get out if we are the discarded thread upon endProcess()
while ((__processThread == Thread.currentThread()) &&
(__model != null) &&
(__model.getValue() < __model.getMaximum())
) {
long sleepFactor = Math.round(Math.random() * 10);
long updatedValue = __model.getValue() +
((_updateValueFactor == 0) ? sleepFactor : _updateValueFactor);
long maximum = __model.getMaximum();
if (updatedValue > maximum) {
updatedValue = maximum;
}
__model.setValue(updatedValue);
sleep(sleepFactor * _updateIntervalFactor);
}
}
catch (InterruptedException ie) {
_LOG.log(Level.WARNING, "Background task thread interrupted", ie);
}
__model = null;
}
}
static private final Logger _LOG = Logger.getLogger(
ProgressIndicatorBean.class.getName());
}