/*
* Copyright to 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.rioproject.logging;
import org.rioproject.logging.jul.JULServiceLogEventHandler;
import java.io.File;
import java.lang.reflect.Method;
import java.util.Iterator;
import java.util.logging.Handler;
/**
* Helper to setup and return instances of a {@link ServiceLogEventHandler}.
*
* @author Dennis Reedy
*/
public class ServiceLogEventHandlerHelper {
/**
* Add a {@link ServiceLogEventHandler} to the underlying logging system.
*/
@SuppressWarnings("unused")
public static void addServiceLogEventHandler() {
if(!LoggingSystem.usingJUL()) {
addLogbackAppender();
} else {
java.util.logging.Logger.getLogger("").addHandler(new JULServiceLogEventHandler());
}
}
/**
* Find a {@link ServiceLogEventHandler} in the underlying logging system.
*
* @return The first instance of a {@link ServiceLogEventHandler} found in the underlying logging system.
* If no instance is found, return a {@code null}.
*/
@SuppressWarnings("unchecked")
public static ServiceLogEventHandler findInstance() {
ServiceLogEventHandler handler = null;
if(LoggingSystem.usingJUL()) {
for(Handler h : java.util.logging.Logger.getLogger("").getHandlers()) {
if(h instanceof ServiceLogEventHandler) {
handler = (ServiceLogEventHandler)h;
break;
}
}
} else {
/* Reflection is used here because Logback may not be in the classpath. */
try {
Class loggerFactory = Class.forName("org.slf4j.LoggerFactory");
Method getILoggerFactory = loggerFactory.getMethod("getILoggerFactory");
Object loggerContext = getILoggerFactory.invoke(null);
Method getLoggerList = loggerContext.getClass().getMethod("getLoggerList");
for(Object logger : (Iterable)getLoggerList.invoke(loggerContext)) {
Method iteratorForAppenders = logger.getClass().getMethod("iteratorForAppenders");
for (Iterator index = (Iterator) iteratorForAppenders.invoke(logger); index.hasNext();) {
Object appender = index.next();
if(appender instanceof ServiceLogEventHandler) {
handler = (ServiceLogEventHandler)appender;
break;
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
return handler;
}
@SuppressWarnings("unchecked")
private static void addLogbackAppender() {
/* Reflection is used here because Logback may not be in the classpath. */
try {
String rioHome = System.getProperty("RIO_HOME", System.getenv("RIO_HOME"));
File configuration = new File(rioHome, "config/logging/appender-config.xml");
if(!configuration.exists())
return;
Class loggerFactory = Class.forName("org.slf4j.LoggerFactory");
Method getILoggerFactory = loggerFactory.getMethod("getILoggerFactory");
Object loggerContext = getILoggerFactory.invoke(null);
Class configuratorClass = Class.forName("ch.qos.logback.classic.joran.JoranConfigurator");
Object configurator = configuratorClass.newInstance();
for(Method method : configuratorClass.getMethods()) {
if(method.getName().equals("setContext")) {
method.invoke(configurator, loggerContext);
break;
}
}
Method doConfigure = configuratorClass.getMethod("doConfigure", File.class);
doConfigure.invoke(configurator, configuration);
} catch (Exception e) {
e.printStackTrace();
}
}
}