首页 > 解决方案 > Spring -@Recover - 找不到恢复方法

问题描述

我在一个类中有一个带有 Retryable 和 Recover 方法的 Spring 项目。重试 2 次后,代码无法命中 Recover 方法块,错误为

Cannot locate recovery method; nested exception is org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://localhost:8081/api/start": Connection refused; nested exception is java.net.ConnectException: Connection refused

Retryable 方法附加到 AOP。

代码可在 Github Repo 中找到:https ://github.com/Nikhilgupta1891/RetryRecover

在 repo 中,以下是相关的类名称:

  1. AOP:ApcAspect.java
  2. 调度程序(入口点):ScheduledClass.java
  3. 服务类未运行恢复:ClassTwo.java#L37

附上ClassTwo的代码以供快速参考:

package com.abc.pbm.racassignmentpoll.services;

import lombok.extern.slf4j.Slf4j;
import org.springframework.http.ResponseEntity;
import org.springframework.retry.annotation.Backoff;
import org.springframework.retry.annotation.Recover;
import org.springframework.retry.annotation.Retryable;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
public class ClassTwo {
    private final RestTemplate restTemplate = new RestTemplate();
    private final String crimApiBaseUrl = "http://localhost:8081/api/";

    @Retryable(maxAttemptsExpression = "2", backoff = @Backoff(delayExpression = "5000"))
    public ResponseEntity startSecondMethod(String invEligDt, String runType) {
        Map<String, Object> reqBody = new HashMap<>();
        reqBody.put("INV_ELIG_DT", invEligDt);
        reqBody.put("RUNTYPE", runType);

        ResponseEntity responseEntity = restTemplate.postForEntity(crimApiBaseUrl + "start",
                reqBody,
                null,
                Collections.EMPTY_MAP);
        return responseEntity;
    }

    @Recover
    public void recover(Exception error, String invEligDt, String runType){
        // Some action.
        log.info("INside recovery");
    }
}

标签: javaspringspring-bootaop

解决方案


两个方法的返回类型和输入参数:Retryable 和 Recovery 方法应该相同。


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