First drop
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package example;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.List;
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import net.sf.cglib.proxy.MethodInterceptor;
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import net.sf.cglib.proxy.MethodProxy;
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public class MyMethodInterceptor implements MethodInterceptor {
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static List<String> interceptedMethods = new ArrayList<String>();
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public static boolean callSupers = true;
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@Override
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public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
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// System.out.println("intercepted:" + method);
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interceptedMethods.add(method.toString());
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if (callSupers) {
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try {
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proxy.invokeSuper(obj, args);
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} catch (Throwable t) {
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t.printStackTrace();
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}
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}
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return null;
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}
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public static String interceptionLog() {
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return "Interception list: " + interceptedMethods.toString();
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}
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public static void clearLog() {
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interceptedMethods.clear();
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}
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public static void setCallSupers(boolean b) {
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if (b) {
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System.out.println("interceptorConfiguration: turning on super calls");
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callSupers = true;
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} else {
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System.out.println("interceptorConfiguration: turning off super calls");
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callSupers = false;
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}
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}
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}
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@@ -0,0 +1,48 @@
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package example;
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import java.lang.reflect.UndeclaredThrowableException;
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import net.sf.cglib.proxy.Callback;
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import net.sf.cglib.proxy.Enhancer;
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import net.sf.cglib.proxy.MethodInterceptor;
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import net.sf.cglib.transform.impl.UndeclaredThrowableStrategy;
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public class ProxyBuilder {
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static <T> T createProxyFor(Class<T> clazz, MethodInterceptor mi) {
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Enhancer enhancer = new Enhancer();
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// if (classLoader != null) {
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// enhancer.setClassLoader(classLoader);
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// if (classLoader instanceof SmartClassLoader &&
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// ((SmartClassLoader) classLoader).isClassReloadable(proxySuperClass)) {
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// enhancer.setUseCache(false);
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// }
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// }
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enhancer.setSuperclass(clazz);
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enhancer.setStrategy(new UndeclaredThrowableStrategy(UndeclaredThrowableException.class));
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enhancer.setInterfaces(null);//AopProxyUtils.completeProxiedInterfaces(this.advised));
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enhancer.setInterceptDuringConstruction(false);
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Callback[] callbacks = new Callback[] { mi };//getCallbacks(rootClass);
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enhancer.setCallbacks(callbacks);
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// enhancer.setCallbackFilter(new ProxyCallbackFilter(
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// this.advised.getConfigurationOnlyCopy(), this.fixedInterceptorMap, this.fixedInterceptorOffset));
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Class<?>[] types = new Class[callbacks.length];
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for (int x = 0; x < types.length; x++) {
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types[x] = callbacks[x].getClass();
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}
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enhancer.setCallbackTypes(types);
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// Generate the proxy class and create a proxy instance.
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// Object proxy;
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// if (this.constructorArgs != null) {
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// proxy = enhancer.create(this.constructorArgTypes, this.constructorArgs);
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// }
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// else {
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@SuppressWarnings("unchecked")
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T proxy = (T) enhancer.create();
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// }
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return proxy;
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}
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}
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@@ -0,0 +1,37 @@
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package example;
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public class ProxyTestcase {
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static Simple proxy = ProxyBuilder.createProxyFor(Simple.class, new MyMethodInterceptor());
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public static void main(String[] args) {
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run();
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}
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public static void run() {
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MyMethodInterceptor.clearLog();
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proxy.moo();
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System.out.println(MyMethodInterceptor.interceptionLog());
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}
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public static void runMoo() {
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MyMethodInterceptor.clearLog();
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proxy.moo();
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System.out.println(MyMethodInterceptor.interceptionLog());
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}
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public static void runBar() {
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MyMethodInterceptor.clearLog();
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// proxy.bar(1, "abc", 3L); active in ProxyTestcase2
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System.out.println(MyMethodInterceptor.interceptionLog());
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}
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public static void configureTest1() {
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MyMethodInterceptor.setCallSupers(false);
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}
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public static void configureTest2() {
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MyMethodInterceptor.setCallSupers(true);
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}
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}
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@@ -0,0 +1,29 @@
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package example;
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public class ProxyTestcase2 {
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static Simple2 proxy;// = ProxyBuilder.createProxyFor(Simple2.class);
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public static void main(String[] args) {
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run();
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}
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public static void run() {
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MyMethodInterceptor.clearLog();
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proxy.boo();
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System.out.println(MyMethodInterceptor.interceptionLog());
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}
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public static void runMoo() {
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MyMethodInterceptor.clearLog();
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proxy.moo();
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System.out.println(MyMethodInterceptor.interceptionLog());
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}
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public static void runBar() {
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MyMethodInterceptor.clearLog();
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proxy.bar(1, "abc", 3L);
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System.out.println(MyMethodInterceptor.interceptionLog());
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}
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}
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@@ -0,0 +1,8 @@
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package example;
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public class Simple {
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void moo() {
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System.out.println("Simple.moo() running");
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}
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}
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@@ -0,0 +1,17 @@
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package example;
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public class Simple2 {
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void moo() {
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System.out.println("Simple2.moo() running");
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}
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void boo() {
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System.out.println("Simple2.boo() running");
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}
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public void bar(int i, String string, long l) {
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System.out.println("Simple2.bar(" + i + "," + string + "," + l + ") running");
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}
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}
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