提供端和消费端都需要生成代理对象，默认通过 JavassistProxyFactory

提供端

在项目启动暴露服务的时候完成代理对象的创建工作，调用顺序

ServiceBean#afterPropertiesSet => 
ServiceConfig#export => 
ServiceConfig#doExport => 
ServiceConfig#doExportUrlsFor1Protocol

1. 创建代理对象Wrapper
2. 创建AbstractProxyInvoker对象，在AbstractProxyInvoker#doInvoke方法中调用Wrapper#invokeMethod
3. 以Invoker对象为入参创建Exporter对象

package org.apache.dubbo.common.bytecode;

import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import org.apache.dubbo.common.bytecode.ClassGenerator.DC;
import org.apache.dubbo.demo.provider.DemoServiceImpl;

public class Wrapper1 extends Wrapper implements DC {
    public static String[] pns;
    public static Map pts;
    public static String[] mns;
    public static String[] dmns;
    public static Class[] mts0;

    public String[] getPropertyNames() {
        return pns;
    }

    public boolean hasProperty(String var1) {
        return pts.containsKey(var1);
    }

    public Class getPropertyType(String var1) {
        return (Class)pts.get(var1);
    }

    public String[] getMethodNames() {
        return mns;
    }

    public String[] getDeclaredMethodNames() {
        return dmns;
    }

    public void setPropertyValue(Object var1, String var2, Object var3) {
        try {
            DemoServiceImpl var4 = (DemoServiceImpl)var1;
        } catch (Throwable var6) {
            throw new IllegalArgumentException(var6);
        }
        throw new NoSuchPropertyException("Not found property \"" + var2 + "\" field or setter method in class org.apache.dubbo.demo.provider.DemoServiceImpl.");
    }

    public Object getPropertyValue(Object var1, String var2) {
        try {
            DemoServiceImpl var3 = (DemoServiceImpl)var1;
        } catch (Throwable var5) {
            throw new IllegalArgumentException(var5);
        }
        throw new NoSuchPropertyException("Not found property \"" + var2 + "\" field or setter method in class org.apache.dubbo.demo.provider.DemoServiceImpl.");
    }

    public Object invokeMethod(Object var1, String var2, Class[] var3, Object[] var4) throws InvocationTargetException {
        DemoServiceImpl var5;
        try {
            var5 = (DemoServiceImpl)var1;
        } catch (Throwable var8) {
            throw new IllegalArgumentException(var8);
        }
        try {
            if ("sayHello".equals(var2) && var3.length == 1) {
                return var5.sayHello((String)var4[0]);
            }
        } catch (Throwable var9) {
            throw new InvocationTargetException(var9);
        }
        throw new NoSuchMethodException("Not found method \"" + var2 + "\" in class org.apache.dubbo.demo.provider.DemoServiceImpl.");
    }
    
    public Wrapper1() {
    }
}

消费端

在项目启动创建引用Bean的时候完成代理对象的创建工作，引用Bean即所谓的代理对象，调用顺序

ReferenceBean#afterPropertiesSet => 
ReferenceBean#getObject => 
ReferenceConfig#init => 
ReferenceConfig#createProxy

1. 创建Invoker对象，此过程完成 消费端节点注册、节点监听、Invoker对象创建
2. 以Invoker为入参创建代理对象

public class proxy0 implements ClassGenerator.DC, EchoService, DemoService{
  public static Method[] methods;
  private InvocationHandler handler;

  public String sayHello(String paramString){
    Object[] arrayOfObject = new Object[1];
    arrayOfObject[0] = paramString;
    Object localObject = this.handler.invoke(this, methods[0], arrayOfObject);
    return ((String)localObject);
  }

  public Object $echo(Object paramObject)
  {
    Object[] arrayOfObject = new Object[1];
    arrayOfObject[0] = paramObject;
    Object localObject = this.handler.invoke(this, methods[1], arrayOfObject);
    return ((Object)localObject);
  }

  public proxy0(){
  }

  public proxy0(InvocationHandler paramInvocationHandler){
    this.handler = paramInvocationHandler;
  }
}