dynamic proxy is essentially the core of Java technologies model, AOP model had been applied. Now we use the Spring EJB3 Hibernate, and most have a dynamic proxy framework in which, but expression isn't apparent when in use.
JDK dynamic proxy itself give the API, but not prominent because of overall performance or features, so these frameworks is to specialized byte code library Code Era Library, Code Generation Library, presently you can find CGLib (depending on ASM) and Javassist.
performance now than ever just before JDK 6.0 version of one.four has greatly enhanced, I lately utilized this write-up Why do you believe CGLib proxies are quicker than JDK Proxies? The check code are about the JDK and CGLib Javassist 3 dynamic agent properties had been tested and found astonishing outcomes, to not say that specific database performance bytecode faster than the JDK, at least Javassist sluggish.
JDK and CGLib test code inside the TSS article, I test to Javassist, and JDK are:
public course ProxyPerformanceComparison2 {
public static void main (String [] args) throws Exception {
Callable jdkProxy = (Callable)
Proxy.newProxyInstance (ClassLoader.getSystemClassLoader (),
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Callable.class,
new JdkHandler (new Counter ()));
ProxyFactory f = new ProxyFactory ();
f.setInterfaces (new Class [] Callable.class);
Class c = f.createClass ();
Callable cglibProxy = (Callable) c.newInstance ();
((ProxyObject) cglibProxy). setHandler
(new JavaAssitInterceptor (new Counter ()));
for (int i2 = 0; i2
public Object invoke
(Object self, Method m, Approach move forward, Object [] args) throws Throwable
return m.invoke (delegate, args);
}
static course Counter implements Callable {
int count = 0;
public Integer call () throws Exception
return count + +;
}
}
test The results are as follows:
JDK six and CGLib cglib-nodep-2.2.jar comparative results:
JDK Proxy: one,049,
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CGLIB: 2,820,130 calls / s
If you are employing previous variations of cglib, quicker performance:
JDK Proxy: one,037,575 calls / s
CGLIB: 3,112,727 calls / s
the JDK six and JavaAssit three.11 Test outcomes are as follows:
JDK Proxy: one,037,575 calls / s
JAVAASSIST: 626,695 calls / s
JAVAASSIST even slower than JDK 6, wonderful.
worse is, Hibernate three.three or later to use JavaAssit,
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Tapstry5 also use JAVAASSIST, Javassist vs. Each and every Other Bytecode Library Available
optimize performance of each phase, small accumulation, will type a large impact.