spring retry 重试机制
1.该重试需要引入jar包
<dependency>
<groupId>org.springframework.retry</groupId>
<artifactId>spring-retry</artifactId>
<version>1.1.2.RELEASE</version>
</dependency>
2.使用@Retryable和@Recover注解
@Retryable注解
被注解的方法发生异常时会重试
value:指定发生的异常进行重试
include:和value一样,默认空,当exclude也为空时,所有异常都重试
exclude:指定异常不重试,默认空,当include也为空时,所有异常都重试
maxAttemps:重试次数,默认3
backoff:重试补偿机制,默认没有
@Backoff注解
delay:指定延迟后重试
multiplier:指定延迟的倍数,比如delay=5000l,multiplier=2时,第一次重试为5秒后,第二次为10秒,第三次为20秒
@Recover
当重试到达指定次数时,被注解的方法将被回调,可以在该方法中进行日志处理。需要注意的是发生的异常和入参类型一致时才会回调
3.下面是test类
import com.ampmind.framework.service.exception.BizException;
import com.ampmind.framework.util.log.Logger;
import com.ampmind.framework.util.log.LoggerFactory;
import org.springframework.retry.annotation.Backoff;
import org.springframework.retry.annotation.EnableRetry;
import org.springframework.retry.annotation.Recover;
import org.springframework.retry.annotation.Retryable;
import org.springframework.stereotype.Service;
/**
* 测试重试机制的类
*
* @author Tonfu.Chia
* @create 2017-07-26-下午1:51
*/
@EnableRetry
@Service
public class RetryService {
private Logger logger = LoggerFactory.getLogger(RetryService.class);
int count = 1;
@Retryable(maxAttempts = 5, backoff = @Backoff(delay = 1000, multiplier = 5), include = CanNotGetLockException.class)
public void service() throws CanNotGetLockException {
logger.info("", "重试第" + (count++) + "次。。。。。。");
throw new CanNotGetLockException("重试异常");
}
@Recover
public void recoverMethod(CanNotGetLockException e) {
logger.info("", "数据恢复方法" + (count++));
}
class CanNotGetLockException extends BizException {
public CanNotGetLockException() {
}
public CanNotGetLockException(String message) {
super(message);
}
public CanNotGetLockException(Throwable cause) {
super(cause);
}
public CanNotGetLockException(String message, String bizId) {
super(message, bizId);
}
}
}