/*
* 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.commons.configuration.reloading;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.FileWriter;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.FileSystem;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.configuration.VFSFileSystem;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
* Test case for the VFSFileMonitorReloadingStrategy class.
*
* @author Ralph Goers
* @version $Id: TestVFSFileChangedReloadingStrategy.java 1225909 2011-12-30 20:09:00Z oheger $
*/
public class TestVFSFileChangedReloadingStrategy
{
/** Constant for the name of a test properties file.*/
private static final String TEST_FILE = "test.properties";
@Before
public void setUp() throws Exception
{
FileSystem.setDefaultFileSystem(new VFSFileSystem());
}
@After
public void tearDown() throws Exception
{
FileSystem.resetDefaultFileSystem();
}
@Test
public void testAutomaticReloading() throws Exception
{
// create a new configuration
File file = new File("target/testReload.properties");
if (file.exists())
{
file.delete();
}
// create the configuration file
FileWriter out = new FileWriter(file);
out.write("string=value1");
out.flush();
out.close();
// load the configuration
PropertiesConfiguration config = new PropertiesConfiguration("target/testReload.properties");
VFSFileChangedReloadingStrategy strategy = new VFSFileChangedReloadingStrategy();
strategy.setRefreshDelay(500);
config.setReloadingStrategy(strategy);
assertEquals("Initial value", "value1", config.getString("string"));
Thread.sleep(2000);
// change the file
out = new FileWriter(file);
out.write("string=value2");
out.flush();
out.close();
// test the automatic reloading
assertEquals("Modified value with enabled reloading", "value2", config.getString("string"));
}
@Test
public void testNewFileReloading() throws Exception
{
// create a new configuration
File file = new File("target/testReload.properties");
if (file.exists())
{
file.delete();
}
PropertiesConfiguration config = new PropertiesConfiguration();
config.setFile(file);
VFSFileChangedReloadingStrategy strategy = new VFSFileChangedReloadingStrategy();
strategy.setRefreshDelay(500);
config.setReloadingStrategy(strategy);
assertNull("Initial value", config.getString("string"));
// change the file
FileWriter out = new FileWriter(file);
out.write("string=value1");
out.flush();
out.close();
Thread.sleep(2000);
// test the automatic reloading
assertEquals("Modified value with enabled reloading", "value1", config.getString("string"));
}
@Test
public void testGetRefreshDelay() throws Exception
{
VFSFileChangedReloadingStrategy strategy = new VFSFileChangedReloadingStrategy();
strategy.setRefreshDelay(500);
assertEquals("refresh delay", 500, strategy.getRefreshDelay());
}
/**
* Tests calling reloadingRequired() multiple times before a reload actually
* happens. This test is related to CONFIGURATION-302.
*/
@Test
public void testReloadingRequiredMultipleTimes()
throws ConfigurationException
{
VFSFileChangedReloadingStrategy strategy = new VFSFileChangedReloadingStrategy()
{
@Override
protected boolean hasChanged()
{
// signal always a change
return true;
}
};
strategy.setRefreshDelay(100000);
PropertiesConfiguration config = new PropertiesConfiguration(TEST_FILE);
config.setReloadingStrategy(strategy);
assertTrue("Reloading not required", strategy.reloadingRequired());
assertTrue("Reloading no more required", strategy.reloadingRequired());
strategy.reloadingPerformed();
assertFalse("Reloading still required", strategy.reloadingRequired());
}
}