1.pom.xml
<dependency>
<groupId>com.github.rholder</groupId>
<artifactId>guava-retrying</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
2.注解定义
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)
public @interface GuavaRetrying {
Class[] exceptionClass() default {};
int attemptNumber() default 0;
long waitStrategySleepTime() default 0;
long duration() default 0;
}
3.注解增强
import com.github.rholder.retry.RetryerBuilder;
import com.github.rholder.retry.StopStrategies;
import com.github.rholder.retry.WaitStrategies;
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.Service;
import java.lang.reflect.Method;
import java.util.concurrent.TimeUnit;
@Aspect
@Service
public class GuavaRetryingAspect {
@Around(value = "@annotation(com.test.application.aop.GuavaRetrying)")
public Object monitorAround(ProceedingJoinPoint pjp) throws Throwable {
Method method;
if (pjp.getSignature() instanceof MethodSignature) {
MethodSignature signature = (MethodSignature) pjp.getSignature();
method = signature.getMethod();
} else {
return null;
}
GuavaRetrying annotation = method.getDeclaredAnnotation(GuavaRetrying.class);
if (annotation.duration() <= 0 && annotation.attemptNumber() <= 1) {
return pjp.proceed();
}
RetryerBuilder builder = RetryerBuilder.newBuilder();
if (annotation.attemptNumber() > 0) {
builder.withStopStrategy(StopStrategies.stopAfterAttempt(annotation.attemptNumber()));
}
if (annotation.duration() > 0) {
builder.withStopStrategy(StopStrategies.stopAfterDelay(annotation.duration(), TimeUnit.MILLISECONDS));
}
if (annotation.waitStrategySleepTime() > 0) {
builder.withWaitStrategy(WaitStrategies.fixedWait(annotation.waitStrategySleepTime(), TimeUnit.SECONDS));
}
if (annotation.exceptionClass().length > 0) {
for (Class retryThrowable : annotation.exceptionClass()) {
if (retryThrowable != null && Throwable.class.isAssignableFrom(retryThrowable)) {
builder.retryIfExceptionOfType(retryThrowable);
}
}
}
return builder.build().call(() -> {
try {
return pjp.proceed();
} catch (Throwable throwable) {
throw new Exception(throwable);
}
});
}
}
4.定义使用接口
public interface Getnameservice {
String getName() throws Exception;
}
5.接口实现
import com.test.application.aop.GuavaRetrying;
import com.test.application.service.Getnameservice;
import org.springframework.stereotype.Service;
import java.text.SimpleDateFormat;
import java.util.Date;
@Service
public class GetnameserviceImpl implements Getnameservice {
@Override
@GuavaRetrying(exceptionClass = Exception.class, attemptNumber = 3,waitStrategySleepTime=5)
public String getName() throws Exception {
SimpleDateFormat formatter= new SimpleDateFormat("yyyy-MM-dd 'at' HH:mm:ss z");
Date date = new Date(System.currentTimeMillis());
System.out.println("执行了: "+formatter.format(date));
throw new Exception("我就想报错");
}
}
6.测试代码
import com.test.application.service.Getnameservice;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class Test {
@Autowired
private Getnameservice getnameservice;
@org.junit.Test
public void testretry() throws Exception {
getnameservice.getName();
}
}
7.控制台日志
执行了: 2022-04-29 at 09:40:38 CST
执行了: 2022-04-29 at 09:40:43 CST
执行了: 2022-04-29 at 09:40:48 CST
com.github.rholder.retry.RetryException: Retrying failed to complete successfully after 3 attempts.
at com.github.rholder.retry.Retryer.call(Retryer.java:174)
at com.test.application.aop.GuavaRetryingAspect.monitorAround(GuavaRetryingAspect.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
at com.test.application.service.impl.GetnameserviceImpl$$EnhancerBySpringCGLIB$$92ce3eaa.getName(<generated>)
at Test.testretry(Test.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: java.lang.Exception: java.lang.Exception: 我就想报错
at com.test.application.aop.GuavaRetryingAspect.lambda$monitorAround$0(GuavaRetryingAspect.java:65)
at com.github.rholder.retry.AttemptTimeLimiters$NoAttemptTimeLimit.call(AttemptTimeLimiters.java:78)
at com.github.rholder.retry.Retryer.call(Retryer.java:160)
... 44 more
Caused by: java.lang.Exception: 我就想报错
at com.test.application.service.impl.GetnameserviceImpl.getName(GetnameserviceImpl.java:19)
at com.test.application.service.impl.GetnameserviceImpl$$FastClassBySpringCGLIB$$13a1203c.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
at com.test.application.aop.GuavaRetryingAspect.lambda$monitorAround$0(GuavaRetryingAspect.java:63)
... 46 more
