/**
* Copyright 2014 Netflix, Inc.
*
* 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 com.netflix.config;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.commons.configuration.AbstractConfiguration;
import org.apache.commons.configuration.event.ConfigurationEvent;
import org.apache.commons.configuration.event.ConfigurationListener;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runners.MethodSorters;
import com.netflix.config.sources.URLConfigurationSource;
import com.netflix.config.validation.ValidationException;
import static org.junit.Assert.*;
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class DynamicFileConfigurationTest {
boolean propertyChanged = false;
static DynamicPropertyFactory propertyFactory = null;
private DynamicLongProperty longProp = null;
private static DynamicProperty dynProp = null;
static File configFile = null;
static File createConfigFile(String prefix) throws Exception {
configFile = File.createTempFile(prefix, ".properties");
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(configFile), "UTF-8"));
writer.write("dprops1=123456789");
writer.newLine();
writer.write("dprops2=79.98");
writer.newLine();
writer.write("abc=-2"); // this property should fail validation but should not affect update of other properties
writer.newLine();
writer.close();
System.err.println(configFile.getPath() + " created");
return configFile;
}
static void modifyConfigFile() {
new Thread() {
public void run() {
try {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(configFile), "UTF-8"));
writer.write("abc=-8"); // this property should fail validation but should not affect update of other properties
writer.newLine();
writer.write("dprops1=" + String.valueOf(Long.MIN_VALUE));
writer.newLine();
writer.write("dprops2=" + String.valueOf(Double.MAX_VALUE));
writer.newLine();
writer.close();
System.err.println(configFile.getPath() + " modified");
} catch (Exception e) {
e.printStackTrace();
fail("Unexpected exception");
}
}
}.start();
}
static class Listener implements ConfigurationListener {
volatile ConfigurationEvent lastEventBeforeUpdate;
volatile ConfigurationEvent lastEventAfterUpdate;
AtomicInteger counter = new AtomicInteger();
@Override
public void configurationChanged(ConfigurationEvent event) {
System.out.println("Event received: " + event.getType() + "," + event.getPropertyName() + "," + event.isBeforeUpdate() + "," + event.getPropertyValue());
counter.incrementAndGet();
if (event.isBeforeUpdate()) {
lastEventBeforeUpdate = event;
} else {
lastEventAfterUpdate = event;
}
}
public void clear() {
lastEventBeforeUpdate = null;
lastEventAfterUpdate = null;
}
public ConfigurationEvent getLastEvent(boolean beforeUpdate) {
if (beforeUpdate) {
return lastEventBeforeUpdate;
} else {
return lastEventAfterUpdate;
}
}
public int getCount() {
return counter.get();
}
}
static Listener listener = new Listener();
@BeforeClass
public static void init() throws Exception {
String path = createConfigFile("configFile").toURI().toURL().toString();
System.setProperty(URLConfigurationSource.CONFIG_URL, path);
System.setProperty(FixedDelayPollingScheduler.INITIAL_DELAY_PROPERTY, "0");
System.setProperty(FixedDelayPollingScheduler.DELAY_PROPERTY, "100");
dynProp = DynamicProperty.getInstance("dprops1");
propertyFactory = DynamicPropertyFactory.getInstance();
}
@AfterClass
public static void cleanUp() throws Exception {
if (!configFile.delete()) {
System.err.println("Unable to delete file " + configFile.getPath());
}
}
@Test
public void testDefaultConfigFile() throws Exception {
longProp = propertyFactory.getLongProperty("dprops1", Long.MAX_VALUE, new Runnable() {
public void run() {
propertyChanged = true;
}
});
DynamicIntProperty validatedProp = new DynamicIntProperty("abc", 0) {
@Override
public void validate(String newValue) {
if (Integer.parseInt(newValue) < 0) {
throw new ValidationException("Cannot be negative");
}
}
};
assertEquals(0, validatedProp.get());
assertFalse(propertyChanged);
DynamicDoubleProperty doubleProp = propertyFactory.getDoubleProperty("dprops2", 0.0d);
assertEquals(123456789, longProp.get());
assertEquals(123456789, dynProp.getInteger().intValue());
assertEquals(79.98, doubleProp.get(), 0.00001d);
assertEquals(Double.valueOf(79.98), doubleProp.getValue());
assertEquals(Long.valueOf(123456789L), longProp.getValue());
modifyConfigFile();
ConfigurationManager.getConfigInstance().addConfigurationListener(listener);
Thread.sleep(1000);
assertEquals(Long.MIN_VALUE, longProp.get());
assertEquals(0, validatedProp.get());
assertTrue(propertyChanged);
assertEquals(Double.MAX_VALUE, doubleProp.get(), 0.01d);
assertFalse(ConfigurationManager.isConfigurationInstalled());
Thread.sleep(3000);
// Only 4 events expected, two each for dprops1 and dprops2
assertEquals(4, listener.getCount());
}
@Test
public void testSwitchingToConfiguration() throws Exception {
longProp = propertyFactory.getLongProperty("dprops1", Long.MAX_VALUE, new Runnable() {
public void run() {
propertyChanged = true;
}
});
AbstractConfiguration newConfig = new ConcurrentMapConfiguration();
DynamicStringProperty prop = propertyFactory.getStringProperty("abc", "default");
newConfig.setProperty("abc", "nondefault");
newConfig.setProperty("dprops1", "0");
DynamicPropertyFactory.initWithConfigurationSource(newConfig);
Thread.sleep(2000);
assertEquals("nondefault", prop.get());
assertEquals(0, longProp.get());
assertTrue(newConfig == ConfigurationManager.getConfigInstance());
assertTrue(ConfigurationManager.isConfigurationInstalled());
}
}