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/*
* 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.tuscany.core.monitor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import org.osoa.sca.annotations.Service;
import org.apache.tuscany.host.MonitorFactory;
import org.apache.tuscany.host.monitor.FormatterRegistry;
/**
* A factory for monitors that forwards events to a {@link java.util.logging.Logger Java Logging (JSR47) Logger}.
*
* @version $Rev$ $Date$
* @see java.util.logging
*/
@Service(interfaces = {MonitorFactory.class, FormatterRegistry.class})
public class JavaLoggingMonitorFactory extends ProxyMonitorFactory {
/**
* Construct a MonitorFactory that will monitor the specified methods at the specified levels and generate messages
* using java.util.logging.
* <p/>
* The supplied Properties can be used to specify custom log levels for specific monitor methods. The key should be
* the method name in form returned by <code>Class.getName() + '#' + Method.getName()</code> and the value the log
* level to use as defined by {@link java.util.logging.Level}.
*
* @param levels definition of custom levels for specific monitored methods, may be null or empty.
* @param defaultLevel the default log level to use
* @param bundleName the name of a resource bundle that will be passed to the logger
* @see java.util.logging.Logger
*/
public JavaLoggingMonitorFactory(Properties levels, Level defaultLevel, String bundleName) {
Map<String, Object> configProperties = new HashMap<String, Object>();
configProperties.put("levels", levels);
configProperties.put("defaultLevel", defaultLevel);
configProperties.put("bundleName", bundleName);
initInternal(configProperties);
}
/**
* Constructs a MonitorFactory that needs to be subsequently configured via a call to {@link #initialize}.
*/
public JavaLoggingMonitorFactory() {
}
protected <T> InvocationHandler createInvocationHandler(Class<T> monitorInterface,
Map<String, Level> levels) {
ResourceBundle bundle = locateBundle(monitorInterface, bundleName);
Logger logger = Logger.getLogger(monitorInterface.getName());
return new LoggingHandler(logger, levels, bundle);
}
private class LoggingHandler implements InvocationHandler {
private final Logger logger;
private final Map<String, Level> methodLevels;
private final ResourceBundle bundle;
public LoggingHandler(Logger logger,
Map<String, Level> methodLevels,
ResourceBundle bundle
) {
this.logger = logger;
this.methodLevels = methodLevels;
this.bundle = bundle;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
String sourceMethod = method.getName();
Level level = methodLevels.get(sourceMethod);
if (level != null && logger.isLoggable(level)) {
// construct the key for the resource bundle
String className = logger.getName();
String key = className + '#' + sourceMethod;
LogRecord logRecord = new LogRecord(level, key);
logRecord.setLoggerName(className);
logRecord.setSourceClassName(className);
logRecord.setSourceMethodName(sourceMethod);
logRecord.setParameters(args);
if (args != null) {
for (Object o : args) {
if (o instanceof Throwable) {
logRecord.setMessage(formatException((Throwable) o));
break;
}
}
}
logRecord.setResourceBundle(bundle);
logger.log(logRecord);
}
return null;
}
}
}
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