RestTemplate+Hystrix

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  项目中调用第三方采购的项目，采用的是restTemplate，但这样无法做线程隔离。

import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.http.*;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.util.Map;

/**
 * @author duanxz
 * 2019年6月1日 下午3:41:34
 */
@Component
public class RestTemplateHystrixCombination {

    private Logger logger = LoggerFactory.getLogger(RestTemplateHystrixCombination.class);
    
    @Resource
    @Qualifier("getRestTemplate2")
    RestTemplate restTemplate;


    /**
     *
     * @param url
     * @param name
     * @return
     */
    @HystrixCommand(groupKey="CrmGroup", commandKey = "getTest", commandProperties = {
                    @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "1000"),//指定多久超时，单位毫秒。超时进fallback
                    @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),//判断熔断的最少请求数，默认是10；只有在一个统计窗口内处理的请求数量达到这个阈值，才会进行熔断与否的判断
                    @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "10"),//判断熔断的阈值，默认值50，表示在一个统计窗口内有50%的请求处理失败，会触发熔断
            },
            threadPoolProperties = {
                    @HystrixProperty(name = "coreSize", value = "1"),
                    @HystrixProperty(name = "maximumSize", value = "1"),
                    @HystrixProperty(name = "maxQueueSize", value = "0"),
                    @HystrixProperty(name = "keepAliveTimeMinutes", value = "2"),
                    @HystrixProperty(name = "queueSizeRejectionThreshold", value = "15"),
                    @HystrixProperty(name = "metrics.rollingStats.numBuckets", value = "12"),
                    @HystrixProperty(name = "metrics.rollingStats.timeInMilliseconds", value = "1440")})
    public Object getTest(String url, String name) {
        Object origResult = restTemplate.getForEntity(url, String.class);
        return origResult;
    }
    
}

groupKey和commandKey都是自定义的，取一下能代表业务含义的就好。

timeoutInMilliseconds、coreSize和maximumSize是我要的

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/restTemplate")
public class RestTemplateHystrixCombinationController {
    @Autowired
    RestTemplateHystrixCombination restService;

    @GetMapping("/test")
    public Object testabc(){
        return restService.getTest("http://172.29.163.90:8088/uniteApi/riskService/riskService/sync", "duanxz");
    }
}

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