RestTemplate 埋点接入

编辑
更新时间: 2024-09-18

在本文档将演示如何使用 SOFATracer 对 RestTemplate 进行埋点,本示例工程地址

假设你已经基于 SOFABoot 构建了一个简单的 Spring Web 工程,那么可以通过如下步骤进行操作:

依赖引入

<dependency>
    <groupId>com.alipay.sofa</groupId>
    <artifactId>tracer-sofa-boot-starter</artifactId>
</dependency>

工程配置

在工程的 application.properties 文件下添加 SOFATracer 要使用的参数,包括 spring.application.name 用于标示当前应用的名称;logging.path 用于指定日志的输出目录。

# Application Name
spring.application.name=TestTemplateDemo
# logging path
logging.path=./logs

添加一个提供 RESTful 服务的 Controller

在工程代码中,添加一个简单的 Controller,例如:

@RestController
public class SampleController {
    private final AtomicLong counter = new AtomicLong(0);
    @RequestMapping("/rest")
    public Map<String, Object> rest() {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("count", counter.incrementAndGet());
        return map;
    }

    @RequestMapping("/asyncrest")
    public Map<String, Object> asyncrest() throws InterruptedException {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("count", counter.incrementAndGet());
        Thread.sleep(5000);
        return map;
    }
}

以 API 方式构造 RestTemplate 发起一次对上文的 RESTful 服务的调用

  • 构造 RestTemplate 同步调用实例
RestTemplate restTemplate = SofaTracerRestTemplateBuilder.buildRestTemplate();
ResponseEntity<String> responseEntity = restTemplate.getForEntity(
            "http://sac.alipay.net:8080/rest", String.class);
  • 构造 RestTemplate 异步调用实例
AsyncRestTemplate asyncRestTemplate = SofaTracerRestTemplateBuilder
    .buildAsyncRestTemplate();
ListenableFuture<ResponseEntity<String>> forEntity = asyncRestTemplate.getForEntity(
            "http://sac.alipay.net:8080/asyncrest", String.class);

以自动注入的方式获取 RestTemplate

@Autowired
RestTemplate             restTemplate;

运行

启动 SOFABoot 应用,将会在控制台中看到启动打印的日志:

2018-10-24 10:45:28.683  INFO 5081 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-10-24 10:45:28.733  INFO 5081 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-10-24 10:45:28.736  INFO 5081 --- [           main] c.a.s.t.e.r.RestTemplateDemoApplication  : Started RestTemplateDemoApplication in 2.163 seconds (JVM running for 3.603)

调用成功:

2018-10-24 10:45:28.989  INFO 5081 --- [           main] c.a.s.t.e.r.RestTemplateDemoApplication  : Response is {"count":1}
2018-10-24 10:45:34.014  INFO 5081 --- [           main] c.a.s.t.e.r.RestTemplateDemoApplication  : Async Response is {"count":2}
2018-10-24 10:45:34.014  INFO 5081 --- [           main] c.a.s.t.e.r.RestTemplateDemoApplication  : test finish .......

查看日志

在上面的 application.properties 里面,我们配置的日志打印目录是 ./logs 即当前应用的根目录(我们可以根据自己的实践需要进行配置),在当前工程的根目录下可以看到类似如下结构的日志文件:

./logs
├── spring.log
└── tracelog
    ├── resttemplate-digest.log
    ├── resttemplate-stat.log
    ├── spring-mvc-digest.log
    ├── spring-mvc-stat.log
    ├── static-info.log
    └── tracer-self.log

示例中通过构造两个 RestTemplate(一个同步一个异步) 发起对同一个 RESTful 服务的调用,调用完成后可以在 restTemplate-digest.log 中看到类似如下的日志:

  • 摘要日志
{"time":"2019-09-03 10:33:10.336","local.app":"RestTemplateDemo","traceId":"0a0fe9271567477985327100211176","spanId":"0","span.kind":"client","result.code":"200","current.thread.name":"SimpleAsyncTaskExecutor-1","time.cost.milliseconds":"5009ms","request.url":"http://localhost:8801/asyncrest","method":"GET","req.size.bytes":0,"resp.size.bytes":0,"sys.baggage":"","biz.baggage":""}
  • 统计日志
{"time":"2019-09-03 10:34:04.130","stat.key":{"method":"GET","local.app":"RestTemplateDemo","request.url":"http://localhost:8801/asyncrest"},"count":1,"total.cost.milliseconds":5009,"success":"true","load.test":"F"}