重试

最近项目要用到重试。开始想自己写，后来想用RetryTemplate，最后想到既然项目用了springboot，还是直接集成spring-retry把。

代码

Application

package com.danni;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.retry.annotation.EnableRetry;

@SpringBootApplication
@EnableRetry
public class Application {

    public static void main(String[] args) throws Exception {
        @SuppressWarnings("resource")
		ApplicationContext annotationContext = new AnnotationConfigApplicationContext("com.danni");
        RemoteService remoteService = annotationContext.getBean("remoteService", RemoteService.class);
        remoteService.call();
    }
}

RemoteService

package com.danni;

import org.springframework.remoting.RemoteAccessException;
import org.springframework.retry.annotation.Backoff;
import org.springframework.retry.annotation.Recover;
import org.springframework.retry.annotation.Retryable;
import org.springframework.stereotype.Service;

@Service
public class RemoteService {
@Retryable(value= {RemoteAccessException.class},maxAttempts = 3,backoff = @Backoff(delay = 5000l,multiplier = 1))
public void call() throws Exception {
        System.out.println("do something...");
        throw new RemoteAccessException("RPC调用异常");
}
@Recover
public void recover(RemoteAccessException e) {
        System.out.println(e.getMessage());
}
}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>spring-retry-demo</groupId>
	<artifactId>spring-retry-demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>


	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.3.RELEASE</version>
	</parent>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- Spring Retry -->
		<!-- https://mvnrepository.com/artifact/org.springframework.retry/spring-retry -->
		<dependency>
			<groupId>org.springframework.retry</groupId>
			<artifactId>spring-retry</artifactId>
			<!-- <version>1.1.2.RELEASE</version> -->
		</dependency>
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<!-- <version>1.8.6</version> -->
		</dependency>
	</dependencies>
	<build>
		<sourceDirectory>src</sourceDirectory>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.7.0</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

运行

...省略
16:33:26.561 [main] INFO org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Registering beans for JMX exposure on startup
16:33:26.561 [main] DEBUG org.springframework.jmx.export.annotation.AnnotationMBeanExporter - Autodetecting user-defined JMX MBeans
16:33:26.561 [main] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor@170da4c]
16:33:26.561 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'lifecycleProcessor'
16:33:26.561 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor'
16:33:26.561 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.liveBeansView.mbeanDomain' in any property source
16:33:26.561 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'remoteService'
16:33:26.577 [main] DEBUG org.springframework.retry.support.RetryTemplate - Retry: count=0
do something...
16:33:26.592 [main] DEBUG org.springframework.retry.backoff.ExponentialBackOffPolicy - Sleeping for 5000
16:33:31.592 [main] DEBUG org.springframework.retry.support.RetryTemplate - Checking for rethrow: count=1
16:33:31.592 [main] DEBUG org.springframework.retry.support.RetryTemplate - Retry: count=1
do something...
16:33:31.592 [main] DEBUG org.springframework.retry.backoff.ExponentialBackOffPolicy - Sleeping for 5000
16:33:36.592 [main] DEBUG org.springframework.retry.support.RetryTemplate - Checking for rethrow: count=2
16:33:36.592 [main] DEBUG org.springframework.retry.support.RetryTemplate - Retry: count=2
do something...
16:33:36.592 [main] DEBUG org.springframework.retry.support.RetryTemplate - Checking for rethrow: count=3
16:33:36.592 [main] DEBUG org.springframework.retry.support.RetryTemplate - Retry failed last attempt: count=3
RPC调用异常