001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.examples.impl;
016    
017    import java.lang.reflect.InvocationHandler;
018    import java.lang.reflect.Proxy;
019    import java.util.List;
020    
021    import org.apache.commons.logging.Log;
022    import org.apache.hivemind.InterceptorStack;
023    import org.apache.hivemind.ServiceInterceptorFactory;
024    import org.apache.hivemind.internal.Module;
025    
026    /**
027     * Creates a simple, proxy-based interceptor that mimics most (but not all) of the behavior
028     * of {@link org.apache.hivemind.service.impl.LoggingInterceptorFactory}.
029     *
030     * @author Howard Lewis Ship
031     */
032    public class ProxyLoggingInterceptorFactory implements ServiceInterceptorFactory
033    {
034    
035        public void createInterceptor(InterceptorStack stack, Module invokingModule, List parameters)
036        {
037            Log log = stack.getServiceLog();
038    
039            InvocationHandler handler = new ProxyLoggingInvocationHandler(log, stack.peek());
040    
041            Object interceptor =
042                Proxy.newProxyInstance(
043                    invokingModule.getClassResolver().getClassLoader(),
044                    new Class[] { stack.getServiceInterface()},
045                    handler);
046    
047            stack.push(interceptor);
048        }
049    }