Consul客户端（orbitz和ecwid）API介绍

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Consul客户端（orbitz 与ecwid）API介绍

本文件简要介绍两个consul客户端的使用。近期因为使用consul，学习了解consul的客户端，主要用来注册服务发现服务：

• 添加依赖
• 示例代码
• 效果展示

添加依赖

pom文件加入如下依赖。

注意ecwid是spring-cloud-consul-core的依赖包

        <dependency>
            <groupId>com.ecwid.consul</groupId>
            <artifactId>consul-api</artifactId>
            <version>1.4.0</version>
        </dependency>

或者orbitz的consu客户端

        <!-- consul-client -->
        <dependency>
            <groupId>com.orbitz.consul</groupId>
            <artifactId>consul-client</artifactId>
            <version>0.10.0</version>
        </dependency>
        <!-- consul's dependency-->
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-client</artifactId>
            <version>2.22.2</version>
        </dependency>

示例代码

package com.yq.service.impl;

import com.ecwid.consul.v1.ConsulClient;
import com.ecwid.consul.v1.QueryParams;
import com.ecwid.consul.v1.Response;
import com.ecwid.consul.v1.agent.model.NewService;
import com.ecwid.consul.v1.health.model.HealthService;
import com.ecwid.consul.v1.kv.model.GetValue;
import com.yq.config.ConsulConfig;
import com.yq.service.IConsulService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.List;

/**
 * Simple to Introduction

 *  本代码只是为了说明如何使用consul api，没有使用接口让两个service都集成接口
 * @version 2018/9/1 10:01
 */

@Service
@Slf4j
@Component
public class EcwidConsulServiceImpl implements IConsulService {
    @Autowired
    private ConsulConfig consulConfig;

    private ConsulClient client = null;

    public EcwidConsulServiceImpl() {
        log.info("consulConfig={}", consulConfig);
        //client = new ConsulClient(consulConfig.getConsulIP(), consulConfig.getConsulPort());
        client = new ConsulClient("127.0.0.1", 8500);
    }

    @Override
    public void registerService(String serviceName, String serviceId) {
        // register new service
        NewService newService = new NewService();
        newService.setId(serviceId);
        newService.setName(serviceName);
        newService.setTags(Arrays.asList("EU-West", "EU-East"));
        newService.setPort(8080);

        NewService.Check serviceCheck = new NewService.Check();
        serviceCheck.setHttp("http://127.0.0.1:8080/health");
        serviceCheck.setInterval("10s");
        newService.setCheck(serviceCheck);
        client.agentServiceRegister(newService);
    }

    @Override
    public List<HealthService> findHealthyService(String serviceName) {
        Response<List<HealthService>> healthyServices = client.getHealthServices(serviceName, true, QueryParams.DEFAULT);
        return healthyServices.getValue();
    }

    @Override
    public void storeKV(String key, String value) {
        Response<Boolean> booleanResponse = client.setKVValue(key, value);
    }

    @Override
    public String getKV(String key) {
        Response<GetValue> getValueResponse = client.getKVValue(key);
        //return getValueResponse.getValue().getValue();
        return getValueResponse.getValue().getDecodedValue();
    }

    @Override
    public List<String> findRaftPeers() {
        Response<List<String>> listResponse = client.getStatusPeers();
        return listResponse.getValue();
    }

    @Override
    public String findRaftLeader() {
        Response<String> stringResponse = client.getStatusLeader();
        return stringResponse.getValue();
    }
}

orbitz的代码类似，主要区别在Ecwid的服务是HealthService， 而orbitz的服务是ServiceHealth. 以及获取key/value的差异。详情可见[代码](https://github.com/yqbjtu/springboot/tree/master/ConsulDemo)

效果展示

第一个例子，先使用Ecwid客户端注册服务，然后通过Ecwid和orbitz分别获取服务
注册的服务

分别使用两种客户端获取服务

第二个例子，我们使用orbitz在consul上创建key/value，然后分别通过orbitz和ecwid获取该key的值。

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