一、构建工程
本文的案例主要有三个工程组成:一个server-zipkin,它的主要作用使用ZipkinServer 的功能，收集调用数据，并展示；一个service-hi,对外暴露hi接口；一个service-miya,对外暴露miya接口；这两个service可以相互调用；并且只有调用了，server-zipkin才会收集数据的，这就是为什么叫服务追踪了。了解springcloud架构可以加求求：三五三六二四七二五九
二、构建server-zipkin
建一个spring-boot工程取名为server-zipkin，在其pom引入依赖：
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.zipkin.java</groupId>
<artifactId>zipkin-server</artifactId>
</dependency>
<dependency>
<groupId>io.zipkin.java</groupId>
<artifactId>zipkin-autoconfigure-ui</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.SR6</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
在其程序入口类, 加上注解@EnableZipkinServer，开启ZipkinServer的功能：
@SpringBootApplication
@EnableZipkinServer
public class ServerZipkinApplication {
public static void main(String[] args) {
SpringApplication.run(ServerZipkinApplication.class, args);
}
}
在配置文件application.yml指定服务端口为：
server.port=9411
三、 创建service-hi
在其pom引入起步依赖spring-cloud-starter-zipkin，代码如下：
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--compile('org.springframework.cloud:spring-cloud-starter-zipkin')-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.RC1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
在其配置文件application.yml指定zipkin server的地址，头通过配置“spring.zipkin.base-url”指定：
@SpringBootApplication
@EnableZipkinServer
public class ServerZipkinApplication {
public static void main(String[] args) {
SpringApplication.run(ServerZipkinApplication.class, args);
}
}
通过引入spring-cloud-starter-zipkin依赖和设置spring.zipkin.base-url就可以了。
对外暴露接口：
@SpringBootApplication
@RestController
public class ServiceHiApplication {
public static void main(String[] args) {
SpringApplication.run(ServiceHiApplication.class, args);
}
private static final Logger LOG = Logger.getLogger(ServiceHiApplication.class.getName());
@Autowired
private RestTemplate restTemplate;
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
@RequestMapping("/hi")
public String callHome(){
LOG.log(Level.INFO, "calling trace service-hi ");
return restTemplate.getForObject("http://localhost:8989/miya", String.class);
}
@RequestMapping("/info")
public String info(){
LOG.log(Level.INFO, "calling trace service-hi ");
return "i'm service-hi";
}
@Bean
public AlwaysSampler defaultSampler(){
return new AlwaysSampler();
}
}
四、 创建service-miya
创建过程痛service-hi，引入相同的依赖，配置下spring.zipkin.base-url。
对外暴露接口：
@SpringBootApplication
@RestController
public class ServiceMiyaApplication {
public static void main(String[] args) {
SpringApplication.run(ServiceMiyaApplication.class, args);
}
private static final Logger LOG = Logger.getLogger(ServiceMiyaApplication.class.getName());
@RequestMapping("/hi")
public String home(){
LOG.log(Level.INFO, "hi is being called");
return "hi i'm miya!";
}
@RequestMapping("/miya")
public String info(){
LOG.log(Level.INFO, "info is being called");
return restTemplate.getForObject("http://localhost:8988/info",String.class);
}
@Autowired
private RestTemplate restTemplate;
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
在其配置文件application.yml指定zipkin server的地址，头通过配置“spring.zipkin.base-url”指定：
server.port=8988
spring.zipkin.base-url=http://localhost:9411
spring.application.name=service-hi
通过引入spring-cloud-starter-zipkin依赖和设置spring.zipkin.base-url就可以了。
对外暴露接口：
@SpringBootApplication
@RestController
public class ServiceHiApplication {
public static void main(String[] args) {
SpringApplication.run(ServiceHiApplication.class, args);
}
private static final Logger LOG = Logger.getLogger(ServiceHiApplication.class.getName());
@Autowired
private RestTemplate restTemplate;
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
@RequestMapping("/hi")
public String callHome(){
LOG.log(Level.INFO, "calling trace service-hi ");
return restTemplate.getForObject("http://localhost:8989/miya", String.class);
}
@RequestMapping("/info")
public String info(){
LOG.log(Level.INFO, "calling trace service-hi ");
return "i'm service-hi";
}
@Bean
public AlwaysSampler defaultSampler(){
return new AlwaysSampler();
}
}
启动工程，演示追踪
依次启动上面的三个工程，打开浏览器访问：http://localhost:9411/，会出现以下界面：
访问：http://localhost:8989/miya，浏览器出现：
i’m service-hi
再打开http://localhost:9411/的界面，点击Dependencies,可以发现服务的依赖关系：
点击find traces,可以看到具体服务相互调用的数据：
在这里插入图片描述
