Spring Cloud整合Hystrix

一会员模块

1 添加会员查找服务

package org.crazyit.cloud;

import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MemberController {

    @RequestMapping(value = "/member/{id}", method = RequestMethod.GET,
            produces = MediaType.APPLICATION_JSON_VALUE)
    public Member call(@PathVariable Integer id) {
        Member p = new Member();
        p.setId(id);
        p.setName("angus");
        return p;
    }
}

2 启动会员模块

二销售模块

1 添加依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>

2 添加控制类

package org.crazyit.cloud;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class TestController {

    @Autowired
    private MemberService memberService;

    @RequestMapping(value = "/router", method = RequestMethod.GET,
            produces = MediaType.APPLICATION_JSON_VALUE)
    public Member router() {
        return memberService.getMember(1);
    }

}

3 新建服务类

package org.crazyit.cloud;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;

@Service
//@DefaultProperties(defaultFallback = "getMemberFallback")
public class MemberService {

    @Autowired
    private RestTemplate restTpl;

    @HystrixCommand(fallbackMethod = "getMemberFallback", groupKey = "MemberGroup", commandKey = "MemberCommandKey",
            commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "1000")
    }, threadPoolProperties = {
            @HystrixProperty(name = "coreSize", value = "2")
    })
    public Member getMember(Integer id) {
        try {
            Thread.sleep(2000);
        } catch (Exception e) {
            
        }
        
        Member member = restTpl.getForObject(
                "http://spring-hy-member/member/{id}", Member.class, id);
        return member;
    }

    public Member getMemberFallback(Integer id) {
        Member m = new Member();
        m.setId(1);
        m.setName("error member");
        return m;
    }
}

4 启动项目并测试

Spring Cloud整合Hystrix

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