1. jvm-sandbox之小试牛刀

一、编写一个简单的加法接口

二、使用工具验证

将上面的接口打包，并验证。

三、编写module

3.1 创建一个maven工程

在pom.xml添加parent：

1 <parent>
2     <groupId>com.alibaba.jvm.sandbox</groupId>
3     <artifactId>sandbox-module-starter</artifactId>
4     <version>1.3.1</version>
5   </parent>

添加module class, 将sum的返回值，固定为50

 1 package org.module;
 2 
 3 import com.alibaba.jvm.sandbox.api.Information;
 4 import com.alibaba.jvm.sandbox.api.Module;
 5 import com.alibaba.jvm.sandbox.api.ProcessController;
 6 import com.alibaba.jvm.sandbox.api.annotation.Command;
 7 import com.alibaba.jvm.sandbox.api.listener.ext.Advice;
 8 import com.alibaba.jvm.sandbox.api.listener.ext.AdviceListener;
 9 import com.alibaba.jvm.sandbox.api.listener.ext.EventWatchBuilder;
10 import com.alibaba.jvm.sandbox.api.resource.ModuleEventWatcher;
11 import org.kohsuke.MetaInfServices;
12 
13 import javax.annotation.Resource;
14 
15 @MetaInfServices(Module.class)
16 @Information(id = "sumModule")
17 public class SumModule implements Module {
18     @Resource
19     private ModuleEventWatcher moduleEventWatcher;
20 
21     @Command("changeSum")
22     public void changeSum() {
23         new EventWatchBuilder(moduleEventWatcher)
24                 .onClass("mock.impl.SandBoxImpl")
25                 .onBehavior("sum")
26                 .onWatch(new AdviceListener() {
27 
28                     @Override
29                     protected void afterReturning(Advice advice) throws Throwable {
30                         ProcessController.returnImmediately(50);
31                     }
32                 });
33 
34     }
35 }