/*
* 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;
import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.event.ActionEvent;
import org.apache.myfaces.trinidad.model.BoundedRangeModel;
import org.apache.myfaces.trinidad.model.DefaultBoundedRangeModel;
/**
* Bean for progress component demos.
*
* @version $Name: $ ($Revision: adfrt/faces/adf-faces-demo/src/main/java/oracle/adfdemo/view/faces/ProgressBean.java#1 $) $Date: 16-aug-2005.15:12:28 $
*/
public class ProgressBean implements Serializable
{
public BoundedRangeModel getProgressModel()
{
if (null == __model)
{
prepare();
}
return __model;
}
public void cancelProcess(ActionEvent event)
{
endProcess();
}
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 void endProcess()
{
__processThread = null;
__model = null;
}
protected class ProcessThread extends Thread implements Serializable
{
/**
* @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;
}
private long _updateIntervalFactor;
private long _updateValueFactor;
}
protected volatile DefaultBoundedRangeModel __model;
protected volatile ProcessThread __processThread;
static private final Logger _LOG = Logger.getLogger(
ProgressBean.class.getName());
}