blob: a2bbbd396500462aabb7927db841582a83533927 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.apache.tuscany.common.monitor.impl;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import org.apache.tuscany.common.monitor.MonitorFactory;
/**
* Implementation of a {@link MonitorFactory} that produces implementations that simply return.
*
* @version $Rev$ $Date$
*/
public class NullMonitorFactory implements MonitorFactory {
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));
}
/**
* Singleton invocation hander that does nothing.
*/
private static final InvocationHandler NULL_MONITOR = new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) {
return null;
}
};
}
|
