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autoswitch

java 服务屏蔽开关系统,可以手工降级服务,关闭服务 基于spring AOP机制,可以在特殊情况下屏蔽相关service类的某些返回,并且支持定义默认返回结果,随机屏蔽某些异常服务。 通过启动一个内置的http server来监听外部指令。

对当前应用的影响。

使用指南:

1.在spring配置文件中添加如下,其中switch-service-pointcut是添加紧急情况下需要屏蔽的方法列表

<aop:config proxy-target-class="true"></aop:config>

<bean id="switchInteceptor" class="org.autoswitch.SwitchInteceptor">
</bean>
<bean id="switch-service-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut">
    <property name="patterns">
        <list>
            <value>org.autoswitch.test.*</value>
        </list>
    </property>
</bean>
<aop:config>
    <aop:advisor advice-ref="switchInteceptor" pointcut-ref="switch-service-pointcut"/>
</aop:config>

<bean id="wwitchControlHttpServer" class="org.autoswitch.SwitchControlHttpServer" init-method="init"></bean>

<bean id="testService" class="org.autoswitch.test.TestServiceImpl" />

<bean id="testController" class="org.autoswitch.test.TestController" />
  1. 例如下面的service,上面注释分别是在应用启动后手工屏蔽该服务调用,以后每次调用直接用参数的jsonResult反序列后返回, classmethod是具体到某个方法名称,status为open关闭该服务,close表示重新打开服务,jsonResult是mock返回结果的json串, 如果是基本类型,则必须用ret作为key,其他list,bean之类的就直接用json串,type表示如果list有泛型的话则是返回的类完整类型;

     public class TestServiceImpl implements TestService{
    
     //http://localhost:8080/control/a.htm?classmethod=org.autoswitch.test.TestServiceImpl.hello&status=open&jsonResult=1
     public void hello(){
     	System.out.println("hello");
     }
     
     //http://localhost:8080/control/a.htm?classmethod=org.autoswitch.test.TestServiceImpl.sayHello&status=open&jsonResult={ret:%22goodbuy%22}
     public String sayHello(){
     	return "sayHello";
     }
     //http://localhost:8080/control/a.htm?classmethod=org.autoswitch.test.TestServiceImpl.getNames&status=open&jsonResult=[{"catList":[],"id":1,"name":"aaa"},{"catList":[],"id":1,"name":"aaa"},{"catList":[],"id":1,"name":"aaa"}]&type=org.autoswitch.test.TestBean
     public List<TestBean> getNames(){
     	return null;
     }
     
     //http://localhost:8080/control/a.htm?classmethod=org.autoswitch.test.TestServiceImpl.getBeans&status=open&jsonResult={"catList":["123","456","789"],"id":1,"name":"aaa"}
     public TestBean getBeans(){
     	return null;
     }
     
     }
    

3调用示例代码

  public class MainTest {

  public static void main(String[] args) {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:spring-bean.xml");
		TestService testControl = (TestService) context.getBean("testService");
		try{
			testControl.hello();
			System.out.println(testControl.sayHello());
			List<TestBean> list = testControl.getNames();
			for(TestBean bean: list){
				System.out.println(bean.getId() + bean.getName() + bean.getCatList());
			}
			TestBean bean = testControl.getBeans();
			System.out.println(bean.getId() + bean.getName() + bean.getCatList());
		}catch(Exception e){}

		
		for(int i = 0; i < 10; i++){
			try{
//				testControl.hello();
				System.out.println(testControl.sayHello());
//				List<TestBean> list = testControl.getNames();
//				for(TestBean bean: list){
//					System.out.println(bean.getId() + bean.getName() + bean.getCatList());
//				}
//				TestBean bean = testControl.getBeans();
//				System.out.println(bean.getId() + bean.getName() + bean.getCatList());
			}catch(Exception e){
				e.printStackTrace();
			}	
		}

	}
}

4.输出

Listening on port 8080
hello
sayHello
Incoming connection from /127.0.0.1
New connection thread
goodbuy
goodbuy
Incoming connection from /127.0.0.1
New connection thread
sayHello
sayHello
sayHello
sayHello
sayHello
sayHello
sayHello
sayHello

这里只是提供一种示例,如果要在生产环境中使用,则需要对并发控制,返回结果的序列化,方法名称一致参数不一致等各种情况进行控制, 同时还需要对权限,后台管理系统等可以做优化。

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