【第二十七章】 springboot + zipkin（brave-okhttp实现）

本文截取自：http://blog.csdn.net/liaokailin/article/details/52077620

一、前提

1、zipkin基本知识：附8 zipkin

2、启动zipkin server：

2.1、在官网下载服务jar，http://zipkin.io/pages/quickstart.html，之后使用命令启动服务jar即可。

nohup java -jar zipkin-server-1.5.1-exec.jar &

之后，查看与该jar同目录下的nohup.out日志文件，发现其实该jar也是由springboot打成的，且内置的tomcat的启动端口是9411，如下：

2.2、打开浏览器，http://ip:9411/（host为服务启动的host）。

二、代码实现

1、service1

1.1、pom.xml

<dependency><groupId>io.zipkin.brave</groupId><artifactId>brave-core</artifactId><version>3.9.0</version></dependency><dependency><groupId>io.zipkin.brave</groupId><artifactId>brave-spancollector-http</artifactId><version>3.9.0</version></dependency><dependency><groupId>io.zipkin.brave</groupId><artifactId>brave-web-servlet-filter</artifactId><version>3.9.0</version></dependency><dependency><groupId>io.zipkin.brave</groupId><artifactId>brave-okhttp</artifactId><version>3.9.0</version></dependency>

1.2、ZipkinConfig

package com.xxx.service1.zipkin;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import com.github.kristofa.brave.Brave;
import com.github.kristofa.brave.EmptySpanCollectorMetricsHandler;
import com.github.kristofa.brave.Sampler;
import com.github.kristofa.brave.SpanCollector;
import com.github.kristofa.brave.http.DefaultSpanNameProvider;
import com.github.kristofa.brave.http.HttpSpanCollector;
import com.github.kristofa.brave.okhttp.BraveOkHttpRequestResponseInterceptor;
import com.github.kristofa.brave.servlet.BraveServletFilter;import okhttp3.OkHttpClient;/*** zipkin配置*/
@Configuration
public class ZipkinConfig {@Beanpublic SpanCollector spanCollector() {HttpSpanCollector.Config spanConfig = HttpSpanCollector.Config.builder().compressionEnabled(false)//默认false，span在transport之前是否会被gzipped。.connectTimeout(5000)//5s，默认10s.flushInterval(1)//1s.readTimeout(6000)//5s，默认60s
                                              .build();return HttpSpanCollector.create("http://ip:9411", spanConfig,new EmptySpanCollectorMetricsHandler());}@Beanpublic Brave brave(SpanCollector spanCollector) {Brave.Builder builder = new Brave.Builder("service1");//指定serviceName
        builder.spanCollector(spanCollector);builder.traceSampler(Sampler.create(1));//采集率return builder.build();}@Beanpublic BraveServletFilter braveServletFilter(Brave brave) {/*** 设置sr、ss拦截器*/return new BraveServletFilter(brave.serverRequestInterceptor(), brave.serverResponseInterceptor(),new DefaultSpanNameProvider());}@Beanpublic OkHttpClient okHttpClient(Brave brave){/*** 设置cs、cr拦截器*/return new OkHttpClient.Builder().addInterceptor(new BraveOkHttpRequestResponseInterceptor(brave.clientRequestInterceptor(), brave.clientResponseInterceptor(), new DefaultSpanNameProvider())).build();}}

说明：

HttpSpanCollector：span信息收集器
Brave：基本实例，注意传入的参数是serviceName
BraveServletFilter：设置sr（server receive），ss（server send）拦截器
OkHttpClient：构建client实例，添加拦截器，设置cs（client send），cr（client receive）拦截器

1.3、ZipkinBraveController

package com.xxx.service1.zipkin;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;@Api("zipkin brave api")
@RestController
@RequestMapping("/zipkin/brave/service1")
public class ZipkinBraveController {@Autowiredprivate OkHttpClient okHttpClient;@ApiOperation("trace第一步")@RequestMapping("/test1")public String myboot() throws Exception {Thread.sleep(100);//100msRequest request = new Request.Builder().url("http://localhost:8032/zipkin/brave/service2/test2").build();/** 1、执行execute()的前后，会执行相应的拦截器（cs,cr）* 2、请求在被调用方执行的前后，也会执行相应的拦截器（sr,ss）*/Response response = okHttpClient.newCall(request).execute();return response.body().string();}}

1.4、application.properties

server.port=8031

2、service2

2.1、pom.xml、ZipkinConfig与service1相似，config部分需要换掉serviceName为"service2"

2.2、controller

package com.xxx.service2.zipkin;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;@Api("zipkin brave api")
@RestController
@RequestMapping("/zipkin/brave/service2")
public class ZipkinBraveController {@Autowiredprivate OkHttpClient okHttpClient;@ApiOperation("trace第二步")@RequestMapping(value="/test2",method=RequestMethod.GET)public String myboot() throws Exception {Thread.sleep(200);//100msRequest request3 = new Request.Builder().url("http://localhost:8033/zipkin/brave/service3/test3").build();Response response3 = okHttpClient.newCall(request3).execute();String response3Str = response3.body().string();Request request4 = new Request.Builder().url("http://localhost:8034/zipkin/brave/service4/test4").build();Response response4 = okHttpClient.newCall(request4).execute();String response4Str = response4.body().string();return response3Str + "-" +response4Str;}}

2.3、application.properties

server.port=8032

3、service3

3.1、pom.xml、ZipkinConfig与service1相似，config部分需要换掉serviceName为"service3"

3.2、controller

package com.xxx.service3.zipkin;import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;@Api("zipkin brave api")
@RestController
@RequestMapping("/zipkin/brave/service3")
public class ZipkinBraveController {@ApiOperation("trace第三步")@RequestMapping(value="/test3",method=RequestMethod.GET)public String myboot() throws Exception {Thread.sleep(300);//100msreturn "service3";}}

3.3、application.properties

server.port=8033

4、service4

4.1、pom.xml、ZipkinConfig与service1相似，config部分需要换掉serviceName为"service4"

4.2、controller

package com.xxx.service4.zipkin;import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;@Api("zipkin brave api")
@RestController
@RequestMapping("/zipkin/brave/service4")
public class ZipkinBraveController {@ApiOperation("trace第4步")@RequestMapping(value = "/test4", method = RequestMethod.GET)public String myboot() throws Exception {Thread.sleep(400);//100msreturn "service4";}}