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Cglib create proxy
2022-07-28 22:55:00 【Mangxiao】
CGLIb To create the agent
Create callback
To create the agent （ Through the enhancer and callback interface ）
Set callback
This proxyInstance Is our proxy 
Proxy objects implement interfaces Factory Of setCallBack Method
So how does the proxy object implement this method , We use UserServiceImpl Proxy object as an example , And expand the implementation principle of interception
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.example.tran.service.impl;
import java.lang.reflect.Method;
import org.aopalliance.aop.Advice;
import org.springframework.aop.Advisor;
import org.springframework.aop.SpringProxy;
import org.springframework.aop.TargetClassAware;
import org.springframework.aop.TargetSource;
import org.springframework.aop.framework.Advised;
import org.springframework.aop.framework.AopConfigException;
import org.springframework.cglib.core.ReflectUtils;
import org.springframework.cglib.core.Signature;
import org.springframework.cglib.proxy.Callback;
import org.springframework.cglib.proxy.Dispatcher;
import org.springframework.cglib.proxy.Factory;
import org.springframework.cglib.proxy.MethodInterceptor;
import org.springframework.cglib.proxy.MethodProxy;
import org.springframework.cglib.proxy.NoOp;
public class UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61 extends UserServiceImpl implements SpringProxy, Advised, Factory {
private boolean CGLIB$BOUND;
public static Object CGLIB$FACTORY_DATA;
private static final ThreadLocal CGLIB$THREAD_CALLBACKS;
private static final Callback[] CGLIB$STATIC_CALLBACKS;
private MethodInterceptor CGLIB$CALLBACK_0;
private MethodInterceptor CGLIB$CALLBACK_1;
private NoOp CGLIB$CALLBACK_2;
private Dispatcher CGLIB$CALLBACK_3;
private Dispatcher CGLIB$CALLBACK_4;
private MethodInterceptor CGLIB$CALLBACK_5;
private MethodInterceptor CGLIB$CALLBACK_6;
private static Object CGLIB$CALLBACK_FILTER;
private static final Method CGLIB$accountStar$0$Method;
private static final MethodProxy CGLIB$accountStar$0$Proxy;
private static final Object[] CGLIB$emptyArgs;
private static final Method CGLIB$accountMoney$1$Method;
private static final MethodProxy CGLIB$accountMoney$1$Proxy;
private static final Method CGLIB$equals$2$Method;
private static final MethodProxy CGLIB$equals$2$Proxy;
private static final Method CGLIB$toString$3$Method;
private static final MethodProxy CGLIB$toString$3$Proxy;
private static final Method CGLIB$hashCode$4$Method;
private static final MethodProxy CGLIB$hashCode$4$Proxy;
private static final Method CGLIB$clone$5$Method;
private static final MethodProxy CGLIB$clone$5$Proxy;
static void CGLIB$STATICHOOK10() {
CGLIB$THREAD_CALLBACKS = new ThreadLocal();
CGLIB$emptyArgs = new Object[0];
Class var0 = Class.forName("com.example.tran.service.impl.UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61");
Class var1;
Method[] var10000 = ReflectUtils.findMethods(new String[]{
"equals", "(Ljava/lang/Object;)Z", "toString", "()Ljava/lang/String;", "hashCode", "()I", "clone", "()Ljava/lang/Object;"}, (var1 = Class.forName("java.lang.Object")).getDeclaredMethods());
CGLIB$equals$2$Method = var10000[0];
CGLIB$equals$2$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Object;)Z", "equals", "CGLIB$equals$2");
CGLIB$toString$3$Method = var10000[1];
CGLIB$toString$3$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/String;", "toString", "CGLIB$toString$3");
CGLIB$hashCode$4$Method = var10000[2];
CGLIB$hashCode$4$Proxy = MethodProxy.create(var1, var0, "()I", "hashCode", "CGLIB$hashCode$4");
CGLIB$clone$5$Method = var10000[3];
CGLIB$clone$5$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/Object;", "clone", "CGLIB$clone$5");
var10000 = ReflectUtils.findMethods(new String[]{
"accountStar", "()V", "accountMoney", "()V"}, (var1 = Class.forName("com.example.tran.service.impl.UserServiceImpl")).getDeclaredMethods());
CGLIB$accountStar$0$Method = var10000[0];
CGLIB$accountStar$0$Proxy = MethodProxy.create(var1, var0, "()V", "accountStar", "CGLIB$accountStar$0");
CGLIB$accountMoney$1$Method = var10000[1];
CGLIB$accountMoney$1$Proxy = MethodProxy.create(var1, var0, "()V", "accountMoney", "CGLIB$accountMoney$1");
}
final void CGLIB$accountStar$0() {
super.accountStar();
}
public final void accountStar() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
if (var10000 != null) {
var10000.intercept(this, CGLIB$accountStar$0$Method, CGLIB$emptyArgs, CGLIB$accountStar$0$Proxy);
} else {
super.accountStar();
}
}
final void CGLIB$accountMoney$1() {
super.accountMoney();
}
public final void accountMoney() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
if (var10000 != null) {
var10000.intercept(this, CGLIB$accountMoney$1$Method, CGLIB$emptyArgs, CGLIB$accountMoney$1$Proxy);
} else {
super.accountMoney();
}
}
final boolean CGLIB$equals$2(Object var1) {
return super.equals(var1);
}
public final boolean equals(Object var1) {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_5;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_5;
}
if (var10000 != null) {
Object var2 = var10000.intercept(this, CGLIB$equals$2$Method, new Object[]{
var1}, CGLIB$equals$2$Proxy);
return var2 == null ? false : (Boolean)var2;
} else {
return super.equals(var1);
}
}
final String CGLIB$toString$3() {
return super.toString();
}
public final String toString() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
return var10000 != null ? (String)var10000.intercept(this, CGLIB$toString$3$Method, CGLIB$emptyArgs, CGLIB$toString$3$Proxy) : super.toString();
}
final int CGLIB$hashCode$4() {
return super.hashCode();
}
public final int hashCode() {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_6;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_6;
}
if (var10000 != null) {
Object var1 = var10000.intercept(this, CGLIB$hashCode$4$Method, CGLIB$emptyArgs, CGLIB$hashCode$4$Proxy);
return var1 == null ? 0 : ((Number)var1).intValue();
} else {
return super.hashCode();
}
}
final Object CGLIB$clone$5() throws CloneNotSupportedException {
return super.clone();
}
protected final Object clone() throws CloneNotSupportedException {
MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_0;
}
return var10000 != null ? var10000.intercept(this, CGLIB$clone$5$Method, CGLIB$emptyArgs, CGLIB$clone$5$Proxy) : super.clone();
}
public static MethodProxy CGLIB$findMethodProxy(Signature var0) {
String var10000 = var0.toString();
switch(var10000.hashCode()) {
case -1179333386:
if (var10000.equals("accountStar()V")) {
return CGLIB$accountStar$0$Proxy;
}
break;
case -508378822:
if (var10000.equals("clone()Ljava/lang/Object;")) {
return CGLIB$clone$5$Proxy;
}
break;
case 448476162:
if (var10000.equals("accountMoney()V")) {
return CGLIB$accountMoney$1$Proxy;
}
break;
case 1826985398:
if (var10000.equals("equals(Ljava/lang/Object;)Z")) {
return CGLIB$equals$2$Proxy;
}
break;
case 1913648695:
if (var10000.equals("toString()Ljava/lang/String;")) {
return CGLIB$toString$3$Proxy;
}
break;
case 1984935277:
if (var10000.equals("hashCode()I")) {
return CGLIB$hashCode$4$Proxy;
}
}
return null;
}
public final int indexOf(Advisor var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).indexOf(var1);
}
public final int indexOf(Advice var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).indexOf(var1);
}
public final boolean isFrozen() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).isFrozen();
}
public final Class[] getProxiedInterfaces() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).getProxiedInterfaces();
}
public final boolean isInterfaceProxied(Class var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).isInterfaceProxied(var1);
}
public final String toProxyConfigString() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).toProxyConfigString();
}
public final boolean isProxyTargetClass() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).isProxyTargetClass();
}
public final boolean isExposeProxy() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).isExposeProxy();
}
public final void setPreFiltered(boolean var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).setPreFiltered(var1);
}
public final void setTargetSource(TargetSource var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).setTargetSource(var1);
}
public final boolean isPreFiltered() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).isPreFiltered();
}
public final TargetSource getTargetSource() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).getTargetSource();
}
public final void setExposeProxy(boolean var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).setExposeProxy(var1);
}
public final Advisor[] getAdvisors() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).getAdvisors();
}
public final void addAdvisor(Advisor var1) throws AopConfigException {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).addAdvisor(var1);
}
public final void addAdvisor(int var1, Advisor var2) throws AopConfigException {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).addAdvisor(var1, var2);
}
public final void removeAdvisor(int var1) throws AopConfigException {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).removeAdvisor(var1);
}
public final boolean removeAdvisor(Advisor var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).removeAdvisor(var1);
}
public final boolean removeAdvice(Advice var1) {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).removeAdvice(var1);
}
public final boolean replaceAdvisor(Advisor var1, Advisor var2) throws AopConfigException {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((Advised)var10000.loadObject()).replaceAdvisor(var1, var2);
}
public final void addAdvice(int var1, Advice var2) throws AopConfigException {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).addAdvice(var1, var2);
}
public final void addAdvice(Advice var1) throws AopConfigException {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
((Advised)var10000.loadObject()).addAdvice(var1);
}
public final Class getTargetClass() {
Dispatcher var10000 = this.CGLIB$CALLBACK_4;
if (var10000 == null) {
CGLIB$BIND_CALLBACKS(this);
var10000 = this.CGLIB$CALLBACK_4;
}
return ((TargetClassAware)var10000.loadObject()).getTargetClass();
}
public UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61() {
CGLIB$BIND_CALLBACKS(this);
}
public static void CGLIB$SET_THREAD_CALLBACKS(Callback[] var0) {
CGLIB$THREAD_CALLBACKS.set(var0);
}
public static void CGLIB$SET_STATIC_CALLBACKS(Callback[] var0) {
CGLIB$STATIC_CALLBACKS = var0;
}
private static final void CGLIB$BIND_CALLBACKS(Object var0) {
UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61 var1 = (UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61)var0;
if (!var1.CGLIB$BOUND) {
var1.CGLIB$BOUND = true;
Object var10000 = CGLIB$THREAD_CALLBACKS.get();
if (var10000 == null) {
var10000 = CGLIB$STATIC_CALLBACKS;
if (var10000 == null) {
return;
}
}
Callback[] var10001 = (Callback[])var10000;
var1.CGLIB$CALLBACK_6 = (MethodInterceptor)((Callback[])var10000)[6];
var1.CGLIB$CALLBACK_5 = (MethodInterceptor)var10001[5];
var1.CGLIB$CALLBACK_4 = (Dispatcher)var10001[4];
var1.CGLIB$CALLBACK_3 = (Dispatcher)var10001[3];
var1.CGLIB$CALLBACK_2 = (NoOp)var10001[2];
var1.CGLIB$CALLBACK_1 = (MethodInterceptor)var10001[1];
var1.CGLIB$CALLBACK_0 = (MethodInterceptor)var10001[0];
}
}
public Object newInstance(Callback[] var1) {
CGLIB$SET_THREAD_CALLBACKS(var1);
UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61 var10000 = new UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61();
CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
return var10000;
}
public Object newInstance(Callback var1) {
throw new IllegalStateException("More than one callback object required");
}
public Object newInstance(Class[] var1, Object[] var2, Callback[] var3) {
CGLIB$SET_THREAD_CALLBACKS(var3);
UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61 var10000 = new UserServiceImpl$$EnhancerBySpringCGLIB$$b2af7d61;
switch(var1.length) {
case 0:
var10000.<init>();
CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
return var10000;
default:
throw new IllegalArgumentException("Constructor not found");
}
}
public Callback getCallback(int var1) {
CGLIB$BIND_CALLBACKS(this);
Object var10000;
switch(var1) {
case 0:
var10000 = this.CGLIB$CALLBACK_0;
break;
case 1:
var10000 = this.CGLIB$CALLBACK_1;
break;
case 2:
var10000 = this.CGLIB$CALLBACK_2;
break;
case 3:
var10000 = this.CGLIB$CALLBACK_3;
break;
case 4:
var10000 = this.CGLIB$CALLBACK_4;
break;
case 5:
var10000 = this.CGLIB$CALLBACK_5;
break;
case 6:
var10000 = this.CGLIB$CALLBACK_6;
break;
default:
var10000 = null;
}
return (Callback)var10000;
}
public void setCallback(int var1, Callback var2) {
switch(var1) {
case 0:
this.CGLIB$CALLBACK_0 = (MethodInterceptor)var2;
break;
case 1:
this.CGLIB$CALLBACK_1 = (MethodInterceptor)var2;
break;
case 2:
this.CGLIB$CALLBACK_2 = (NoOp)var2;
break;
case 3:
this.CGLIB$CALLBACK_3 = (Dispatcher)var2;
break;
case 4:
this.CGLIB$CALLBACK_4 = (Dispatcher)var2;
break;
case 5:
this.CGLIB$CALLBACK_5 = (MethodInterceptor)var2;
break;
case 6:
this.CGLIB$CALLBACK_6 = (MethodInterceptor)var2;
}
}
public Callback[] getCallbacks() {
CGLIB$BIND_CALLBACKS(this);
return new Callback[]{
this.CGLIB$CALLBACK_0, this.CGLIB$CALLBACK_1, this.CGLIB$CALLBACK_2, this.CGLIB$CALLBACK_3, this.CGLIB$CALLBACK_4, this.CGLIB$CALLBACK_5, this.CGLIB$CALLBACK_6};
}
public void setCallbacks(Callback[] var1) {
this.CGLIB$CALLBACK_0 = (MethodInterceptor)var1[0];
this.CGLIB$CALLBACK_1 = (MethodInterceptor)var1[1];
this.CGLIB$CALLBACK_2 = (NoOp)var1[2];
this.CGLIB$CALLBACK_3 = (Dispatcher)var1[3];
this.CGLIB$CALLBACK_4 = (Dispatcher)var1[4];
this.CGLIB$CALLBACK_5 = (MethodInterceptor)var1[5];
this.CGLIB$CALLBACK_6 = (MethodInterceptor)var1[6];
}
static {
CGLIB$STATICHOOK10();
}
}
CGLib summary
The proxy object encapsulates the implementation of the target object by inheriting the target object
CGlib The implementation of interception —— Before executing the target method, determine whether the interceptor exists and intercept
You can see , Intercept first , Re execution targetClass.method This process （ adopt super.method To achieve ）
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