最近项目组有个新需求:disable掉某个接口。我当时第一个思路就是用Spring的AOP做切面拦截。但我的香港技术leader却抛给我Togglz,让我拿Togglz去做disable,然后第二天开始他接近一个月的带薪长假。。。
但毕竟到了“可以打我骂我但不能扣我工资”的年纪,我开始着手玩这Togglz的东东(转载请注明出处:Michael孟良
)
Togglz的资料很少,找到了像点人话的简介:如果一个story在当前迭代中无法完成,那样需要给它加上toggle, 这样只需在生产环境将toggle关闭,不为担心未完成的功能被release出去;另一方面,如果发现新的实现、体验不被欢迎,那么只需将toggle关闭就可以快速地返回到旧的实现了。为了满足上面的需求,我们选择了togglz。
下面我在一个简单的SpringBoot上做一个AOP和一个Togglz:
首先做一个清纯的SpringBoot:
SpringBoot
MyApplication.java是启动类
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableAutoConfiguration
@ComponentScan
public class MyApplication {
public static void main(String[] args) {
SpringApplication.run(MyApplication.class, args);
}
}
MainController.java是controller,接口入口
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class MainController {
@Autowired
private MyService myService;
@RequestMapping("/")
@ResponseBody
String home() throws Exception {
System.out.println("springboot项目启动成功!");
return myService.addSalary();
}
}
MyService.java是service端,里面有个addSalary()的方法
import org.springframework.stereotype.Service;
@Service
public class MyService {
public String addSalary() throws Exception {
System.out.println("加人工!");
return "加人工!";
}
}
点击:http://localhost:8080/springboot/
下面AOP和Togglz的demo都是对上面的addSalary()进行disable。
基于上面SpringBoot加上AOP:
Sring-AOP
MyAnnotation.java:自定义注解
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyAnnotation {
String name();
}
MyAspect.java:自定义切面
import java.lang.reflect.Method;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
@Aspect // 1:通过改注解声明一个切面
@Component // 2让切面称为spring管理的bean
public class MyAspect {
//切面
@Around("@annotation(com.m.springboot.aop.MyAnnotation)") //6:直接拦截方法名
public Object before(ProceedingJoinPoint joinPoint) throws Throwable{
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
System.out.println("方法规则式拦截,"+method.getName());
return null;
// return joinPoint.proceed();
}
}
其他方法不变,只需要在MyService的addSalary()上加一个@MyAnnotation
@MyAnnotation(name = "addSalary!")
public String addSalary() throws Exception {
System.out.println("加人工!");
return "加人工!";
}
成功拦截
OK。成功拦截。
下面我们来看看在原来的SpringBoot上加上Togglz:
Togglz
MyFeatures.java:对象的特征
import org.togglz.core.Feature;
import org.togglz.core.annotation.Label;
import org.togglz.core.context.FeatureContext;
public enum MyFeatures implements Feature {
@Label("Employee Management Feature")
EMPLOYEE_MANAGEMENT_FEATURE;
public boolean isActive() {
return FeatureContext.getFeatureManager().isActive(this);
}
}
ToggleConfiguration.java: Togglz的配置,这里主要将上面写的MyFeatures注入到配置中
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.togglz.core.manager.EnumBasedFeatureProvider;
import org.togglz.core.spi.FeatureProvider;
@Configuration
public class ToggleConfiguration {
@Bean
public FeatureProvider featureProvider() {
return new EnumBasedFeatureProvider(MyFeatures.class);
}
}
在yml上加多:
togglz:
features:
EMPLOYEE_MANAGEMENT_FEATURE:
enabled: false
这里的意思是将之前的设置的开关EMPLOYEE_MANAGEMENT_FEATURE,我们默认是关的。
而在之前的addSalary()我们这样写:
public String addSalary() throws Exception {
if (MyFeatures.EMPLOYEE_MANAGEMENT_FEATURE.isActive()) {
System.out.println("加人工!");
return "加人工!";
}else {
return null;
}
}
不要觉得土,我们隔壁村的同事确实这样玩的(允悲.jpg)
当然,最后后台只打印了“springboot启动!”说明也是成功的。
.
笔者写完后沉思怎么优化,两种技术能不能相互结合?尝试后答案是:
完全OJBK项目结构:
SpringAOP整合Togglz
代码由上往下看:
MyAnnotation.java:
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import com.m.springboot.togglz.MyFeatures;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyAnnotation {
MyFeatures value();
}
MyAspect.java:
import java.lang.reflect.Method;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import com.m.springboot.togglz.MyFeatures;
@Aspect // 1:通过改注解声明一个切面
@Component // 2让切面称为spring管理的bean
public class MyAspect {
//切面
@Around("@annotation(com.m.springboot.aop.MyAnnotation)") //6:直接拦截方法名
public Object before(ProceedingJoinPoint joinPoint) throws Throwable{
if (MyFeatures.EMPLOYEE_MANAGEMENT_FEATURE.isActive()) {
return joinPoint.proceed();
}else {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
System.out.println("方法规则式拦截,"+method.getName());
return "方法规则式拦截,"+method.getName();
}
}
}
MyFeatures.java:
import org.togglz.core.Feature;
import org.togglz.core.annotation.Label;
import org.togglz.core.context.FeatureContext;
public enum MyFeatures implements Feature {
@Label("Employee Management Feature")
EMPLOYEE_MANAGEMENT_FEATURE;
public boolean isActive() {
return FeatureContext.getFeatureManager().isActive(this);
}
}
ToggleConfiguration.java:
import java.io.File;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.togglz.core.Feature;
import org.togglz.core.manager.EnumBasedFeatureProvider;
import org.togglz.core.manager.TogglzConfig;
import org.togglz.core.repository.StateRepository;
import org.togglz.core.repository.file.FileBasedStateRepository;
import org.togglz.core.spi.FeatureProvider;
import org.togglz.core.user.UserProvider;
import org.togglz.servlet.user.ServletUserProvider;
@Configuration
public class ToggleConfiguration {
@Bean
public FeatureProvider featureProvider() {
return new EnumBasedFeatureProvider(MyFeatures.class);
}
}
MyService.java:
import org.springframework.stereotype.Service;
import com.m.springboot.aop.MyAnnotation;
import com.m.springboot.togglz.MyFeatures;
@Service
public class MyService {
@MyAnnotation(value = MyFeatures.EMPLOYEE_MANAGEMENT_FEATURE)
public String addSalary() throws Exception {
System.out.println("加人工!");
return "加人工!";
}
}
当application.yml:
server:
port: 8080
togglz:
features:
EMPLOYEE_MANAGEMENT_FEATURE:
enabled: true
console:
springboot启动!
加人工!
当application.yml:
server:
port: 8080
togglz:
features:
EMPLOYEE_MANAGEMENT_FEATURE:
enabled: false
console:
springboot启动!
方法规则式拦截,addSalary
但如果想更加方便,不用改配置文件、再重启服务器这么麻烦,可以再配置一个togglz的后台
togglz后台
只要按这个按钮,就能在生产环境控制你想要控制的功能,你的周末健身时光不再被打扰!!!
PS:这里有个大坑:
yml文件追加
上面的yml我项目根本读不了,后来我在启动类(MyApplication.java)里面重新加载TogglzConsoleServlet才有反应。好了有反应了,又说我没权限,MD,唯有往togglz的底层慢慢读,后来读出它控制权限的一部分:
servletContext.getInitParameter("org.togglz.console.SECURED")
于是我遍在启动类里面顺便设置它为false 。OK
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
servletContext.addServlet("togglzConsoleServlet","org.togglz.console.TogglzConsoleServlet").addMapping("/togglz/*");
servletContext.setInitParameter("org.togglz.console.SECURED","false");
}
OK,So far so good。SpringAOP和Togglz完美整合,后台控制是我做demo时加上去的,项目暂时没有放上去,如果需要了可能要在我togglz后台的权限上再下点功夫。下面是所有代码下载地址:
https://github.com/MichaelYipInGitHub/Spring-AOP-Togglz
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