/*
 * Copyright 2002-2005 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.springframework.aop.framework;

import junit.framework.TestCase;

import org.springframework.aop.support.DelegatingIntroductionInterceptor;
import org.springframework.beans.ITestBean;
import org.springframework.beans.TestBean;
import org.springframework.util.StopWatch;

/**
 * Benchmarks for introductions.
 * 
 * @author Rod Johnson
 * @since 2.0
 */
public class IntroductionBenchmarkTests extends TestCase {
	
	private static final int EXPECTED_COMPARE = 13;
	
	/** Increase this if you want meaningful results! */
	private static final int INVOCATIONS = 100000;

	
	public void testBenchmarks() {
		timeManyInvocations();
	}

	public static class SimpleCounterIntroduction extends DelegatingIntroductionInterceptor implements Counter {
		
		public int getCount() {
			return EXPECTED_COMPARE;
		}
	}
	
	public static interface Counter {
		int getCount();
	}
	
	protected long timeManyInvocations() {
		StopWatch sw = new StopWatch();
		
		TestBean target = new TestBean();
		ProxyFactory pf = new ProxyFactory(target);
		pf.setProxyTargetClass(false);
		pf.addAdvice(new SimpleCounterIntroduction());
		ITestBean proxy = (ITestBean) pf.getProxy();
		
		Counter counter = (Counter) proxy;
		
        sw.start(INVOCATIONS + " invocations on proxy, not hitting introduction");
        for (int i = 0; i < INVOCATIONS; i++) {
        	proxy.getAge();
        }
        sw.stop();
        
        sw.start(INVOCATIONS + " invocations on proxy, hitting introduction");
        for (int i = 0; i < INVOCATIONS; i++) {
        	counter.getCount();
        }
        sw.stop();
        
        sw.start(INVOCATIONS + " invocations on target");
        for (int i = 0; i < INVOCATIONS; i++) {
        	target.getAge();
        }
        sw.stop();
        
        System.out.println(sw.prettyPrint());
        return sw.getLastTaskTimeMillis();
    }
}
