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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.lang.reflect.Proxy;
import java.util.Map;
import org.osoa.sca.annotations.EagerInit;
import org.apache.tuscany.host.MonitorFactory;
import org.apache.tuscany.host.monitor.ExceptionFormatter;
/**
* Implementation of a {@link MonitorFactory} that produces implementations that simply return.
*
* @version $Rev$ $Date$
*/
@EagerInit
public class NullMonitorFactory implements MonitorFactory {
/**
* Singleton hander that does nothing.
*/
private static final InvocationHandler NULL_MONITOR = new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) {
return null;
}
};
public void initialize(Map<String, Object> configProperties) {
}
public <T> T getMonitor(Class<T> monitorInterface) {
/*
* This uses a reflection proxy to implement the monitor interface which
* is a simple but perhaps not very performant solution. Performance
* might be improved by code generating an implementation with empty methods.
*/
return monitorInterface.cast(
Proxy.newProxyInstance(monitorInterface.getClassLoader(), new Class<?>[]{monitorInterface}, NULL_MONITOR));
}
public void register(ExceptionFormatter formatter) {
}
public void unregister(ExceptionFormatter formatter) {
}
}
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