Spring Framework example source code file (IntroductionBenchmarkTests.java)

This example Spring Framework source code file (IntroductionBenchmarkTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

counter, counter, expected_compare, expected_compare, introductionbenchmarktests, invocations, invocations, itestbean, proxyfactory, proxyfactory, simplecounterintroduction, stopwatch, testbean, testcase

The Spring Framework IntroductionBenchmarkTests.java source code

/*
 * 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();
    }
}