案例：
public interface ForumService {
void removeTopic(int topicId);
void removeForum(int forumId);
}
对相关方法进行性能监控
public class ForumServiceImpl implements ForumService {
public void removeTopic(int topicId) {
// PerformanceMonitor.begin("com.hand.proxy.ForumServiceImpl.removeTopic");
System.out.println("模拟删除Topic记录:" + topicId);
try {
Thread.sleep(20);
} catch (InterruptedException e) {
e.printStackTrace();
}
// PerformanceMonitor.end();
}
public void removeForum(int forumId) {
// PerformanceMonitor.begin("com.hand.proxy.ForumServiceImpl.removeForum");
System.out.println("模拟删除Forum记录:" + forumId);
try {
Thread.sleep(20);
} catch (InterruptedException e) {
e.printStackTrace();
}
// PerformanceMonitor.end();
}
}
性能监控实现类：
public class PerformanceMonitor {
// 通过一个ThreadLocal保存与调用线程相关的性能监视信息
private static ThreadLocal<MethodPerformance> performanceRecord = new ThreadLocal<MethodPerformance>();
// 启动对某一目标方法的性能监视
public static void begin(String method) {
System.out.println("begin monitor...");
MethodPerformance mp = new MethodPerformance(method);
performanceRecord.set(mp);
}
public static void end() {
System.out.println("end monitor...");
MethodPerformance mp = performanceRecord.get();
// 打印出方法性能监视的结果信息
mp.printPerformance();
}
}
用于记录性能监控信息：
public class PerformanceMonitor {
// 通过一个ThreadLocal保存与调用线程相关的性能监视信息
private static ThreadLocal<MethodPerformance> performanceRecord = new ThreadLocal<MethodPerformance>();
// 启动对某一目标方法的性能监视
public static void begin(String method) {
System.out.println("begin monitor...");
MethodPerformance mp = new MethodPerformance(method);
performanceRecord.set(mp);
}
public static void end() {
System.out.println("end monitor...");
MethodPerformance mp = performanceRecord.get();
// 打印出方法性能监视的结果信息
mp.printPerformance();
}
}
1、JDK动态代理
public class PerformanceMonitor {
// 通过一个ThreadLocal保存与调用线程相关的性能监视信息
private static ThreadLocal<MethodPerformance> performanceRecord = new ThreadLocal<MethodPerformance>();
// 启动对某一目标方法的性能监视
public static void begin(String method) {
System.out.println("begin monitor...");
MethodPerformance mp = new MethodPerformance(method);
performanceRecord.set(mp);
}
public static void end() {
System.out.println("end monitor...");
MethodPerformance mp = performanceRecord.get();
// 打印出方法性能监视的结果信息
mp.printPerformance();
}
}
public class ForumServiceTest {
@Test
public void proxy() {
ForumService forumService = new ForumServiceImpl();
PerformanceHandler handler = new PerformanceHandler(forumService);
ForumService proxy = (ForumService) Proxy.newProxyInstance(forumService.getClass().getClassLoader(),
forumService.getClass().getInterfaces(), handler);
proxy.removeForum(10);
proxy.removeTopic(1012);
}
}
得到以下输出信息：
begin monitor...
模拟删除Forum记录:10
end monitor...
com.hand.proxy.ForumServiceImpl.removeForum花费21毫秒
begin monitor...
模拟删除Topic记录:1012
end monitor...
com.hand.proxy.ForumServiceImpl.removeTopic花费21毫秒
2、CGLib动态代理
<!-- https://mvnrepository.com/artifact/cglib/cglib --> <dependency> <groupId>cglib</groupId> <artifactId>cglib</artifactId> <version>2.2.2</version> </dependency>
public class CglibProxy implements MethodInterceptor {
private Enhancer enhancer = new Enhancer();
public Object getProxy(Class clazz) {
enhancer.setSuperclass(clazz);
enhancer.setCallback(this);
return enhancer.create();
}
public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
PerformanceMonitor.begin(obj.getClass().getName() + "." + method.getName());
Object result = proxy.invokeSuper(obj, args);
PerformanceMonitor.end();
return result;
}
}
public class ForumServiceTest2 {
@Test
public void proxy() {
CglibProxy proxy = new CglibProxy();
ForumServiceImpl forumService = (ForumServiceImpl) proxy.getProxy(ForumServiceImpl.class);
forumService.removeForum(10);
forumService.removeTopic(1023);
}
}
1）、JDK和CGLib的区别
2）、Spring在选择用JDK还是CGLib的依据
3）、JDK和CGLib的性能对比
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，谢谢大家对脚本之家的支持。如果你想了解更多相关内容请查看下面相关链接
