重试框架 Spring-Retry 和 Guava-Retry，你知道该怎么选吗？（一）

<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
    <version>1.2.2.RELEASE</version>
 </dependency>

package com.zgd.demo.thread.retry;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.RandomUtils;
import org.springframework.remoting.RemoteAccessException;
/**
 * @Author: zgd
 * @Description:
 */
@Slf4j
public class RetryDemoTask {
  /**
   * 重试方法
   * @return
   */
  public static boolean retryTask(String param)  {
    log.info("收到请求参数:{}",param);
    int i = RandomUtils.nextInt(0,11);
    log.info("随机生成的数:{}",i);
    if (i == 0) {
      log.info("为0,抛出参数异常.");
      throw new IllegalArgumentException("参数异常");
    }else if (i  == 1){
      log.info("为1,返回true.");
      return true;
    }else if (i == 2){
      log.info("为2,返回false.");
      return false;
    }else{
      //为其他
        log.info("大于2,抛出自定义异常.");
        throw new RemoteAccessException("大于2,抛出远程访问异常");
      }
    }
}

package com.zgd.demo.thread.retry.spring;
import com.zgd.demo.thread.retry.RetryDemoTask;
import lombok.extern.slf4j.Slf4j;
import org.junit.Test;
import org.springframework.remoting.RemoteAccessException;
import org.springframework.retry.backoff.FixedBackOffPolicy;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;
import java.util.HashMap;
import java.util.Map;
/**
 * @Author: zgd
 * @Description: spring-retry 重试框架
 */
@Slf4j
public class SpringRetryTemplateTest {
  /**
   * 重试间隔时间ms,默认1000ms
   * */
  private long fixedPeriodTime = 1000L;
  /**
   * 最大重试次数,默认为3
   */
  private int maxRetryTimes = 3;
  /**
   * 表示哪些异常需要重试,key表示异常的字节码,value为true表示需要重试
   */
  private Map<Class<? extends Throwable>, Boolean> exceptionMap = new HashMap<>();
  @Test
  public void test() {
    exceptionMap.put(RemoteAccessException.class,true);
    // 构建重试模板实例
    RetryTemplate retryTemplate = new RetryTemplate();
    // 设置重试回退操作策略，主要设置重试间隔时间
    FixedBackOffPolicy backOffPolicy = new FixedBackOffPolicy();
    backOffPolicy.setBackOffPeriod(fixedPeriodTime);
    // 设置重试策略，主要设置重试次数
    SimpleRetryPolicy retryPolicy = new SimpleRetryPolicy(maxRetryTimes, exceptionMap);
    retryTemplate.setRetryPolicy(retryPolicy);
    retryTemplate.setBackOffPolicy(backOffPolicy);
    Boolean execute = retryTemplate.execute(
            //RetryCallback
            retryContext -> {
              boolean b = RetryDemoTask.retryTask("abc");
              log.info("调用的结果:{}", b);
              return b;
            },
            retryContext -> {
              //RecoveryCallback
              log.info("已达到最大重试次数或抛出了不重试的异常~~~");
              return false;
            }
      );
    log.info("执行结果:{}",execute);
  }
}

<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
    <version>1.2.2.RELEASE</version>
 </dependency>
 <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.9.1</version>
 </dependency>

@EnableRetry
public class Application {
 ...
}

package com.zgd.demo.thread.test;
/**
 * @Author: zgd
 * @Description:
 */
import com.zgd.demo.thread.Application;
import lombok.extern.slf4j.Slf4j;
import org.junit.After;
import org.junit.Before;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
/**
 * @Author: zgd
 * @Date: 18/09/29 20:33
 * @Description:
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
@Slf4j
public class MyBaseTest {
  @Before
  public void init() {
    log.info("----------------测试开始---------------");
  }
  @After
  public void after() {
    log.info("----------------测试结束---------------");
  }
}

package com.zgd.demo.thread.retry.spring;
import com.zgd.demo.thread.retry.RetryDemoTask;
import com.zgd.demo.thread.test.MyBaseTest;
import lombok.extern.slf4j.Slf4j;
import org.springframework.remoting.RemoteAccessException;
import org.springframework.retry.ExhaustedRetryException;
import org.springframework.retry.annotation.Backoff;
import org.springframework.retry.annotation.Recover;
import org.springframework.retry.annotation.Retryable;
import org.springframework.stereotype.Component;
/**
 * @Author: zgd
 * @Description:
 */
@Service
@Slf4j
public class SpringRetryDemo   {
 /**
   * 重试所调用方法
   * @param param
   * @return
   */
  @Retryable(value = {RemoteAccessException.class},maxAttempts = 3,backoff = @Backoff(delay = 2000L,multiplier = 2))
  public boolean call(String param){
      return RetryDemoTask.retryTask(param);
  }
  /**
   * 达到最大重试次数,或抛出了一个没有指定进行重试的异常
   * recover 机制
   * @param e 异常
   */
  @Recover
  public boolean recover(Exception e,String param) {
    log.error("达到最大重试次数,或抛出了一个没有指定进行重试的异常:",e);
    return false;
  }
}

package com.zgd.demo.thread.retry.spring;
import com.zgd.demo.thread.test.MyBaseTest;
import lombok.extern.slf4j.Slf4j;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
 * @Author: zgd
 * @Description:
 */
@Component
@Slf4j
public class SpringRetryDemoTest extends MyBaseTest {
  @Autowired
  private SpringRetryDemo springRetryDemo;
  @Test
  public void retry(){
    boolean abc = springRetryDemo.call("abc");
    log.info("--结果是:{}--",abc);
  }
}