服務注冊
1.添加Spring Cloud Zookeeper依賴:
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.6.2</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
2.在服務組態檔中添加zookeeper配置:
spring:
cloud:
zookeeper:
connect-string: localhost:2181 #zookeeper地址
3.啟動zookeeper服務器和服務（我這邊是啟動了兩個服務，分別是provider和consumer），然后在zookeeper客戶端中可以查看已經注冊到zookeeper中的服務:
服務發現
1.創建controller
消費者controller:
package com.buhe.zk.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import java.util.List;
@RestController
public class ZkConsumerController {
private static final String SERVICE_NAME = "provider";
private static final String SERVICE_PATH = "/zk/provider";
@Autowired
private RestTemplate restTemplate;
@Autowired
private DiscoveryClient discoveryClient;
/**
* 呼叫提供者服務
* @return
*/
@GetMapping("/zk/consumer")
public String zkConsumer(){
return "我吃了" + restTemplate.getForObject("http://" + SERVICE_NAME + SERVICE_PATH, String.class);
}
/**
* 獲取提供者服務URL
* @return
*/
@GetMapping("/zk/url")
public String serviceUrl() {
List<ServiceInstance> list = discoveryClient.getInstances(SERVICE_NAME);
if (list != null && list.size() > 0 ) {
return list.get(0).getUri().toString() + SERVICE_PATH;
}
return null;
}
}
要使用RestTemplate別忘了加配置：
@Bean
@LoadBalanced
public RestTemplate restTemplate(){
return new RestTemplate();
}
提供者controller:
package com.buhe.zk.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ZkProviderController {
@GetMapping("/zk/provider")
public String zkProvider(){
return "10個蘋果";
}
}
2.服務呼叫
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標籤：Java
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