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✨ 分布式链路追踪示例
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‎codes/distributed/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>io.github.dunwu.spring</groupId>
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<artifactId>spring-distributed</artifactId>
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<version>1.0.0</version>
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<packaging>pom</packaging>
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<name>Spring::分布式</name>
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<modules>
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<module>trace</module>
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</modules>
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</project>

‎codes/distributed/trace/opentelemetry/async/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.7.7</version>
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<relativePath />
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</parent>
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<groupId>io.github.dunwu.springcloud</groupId>
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<artifactId>spring-opentelemetry-async</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<name>Spring::分布式::链路追踪::OpenTelemetry::异步</name>
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<description>Spring + OpenTelemetry 链路追踪异步手动埋点的示例</description>
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<dependencies>
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<!-- Spring Web 的 Spring Boot 启动包，完成 Web 相关的自动化配置 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<!-- Spring Test 的 Spring Boot 启动包，提供了一些便利的测试工具集 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<!--OpenTelemetry SDK-->
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-api</artifactId>
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</dependency>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-sdk</artifactId>
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</dependency>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-exporter-otlp</artifactId>
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</dependency>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-semconv</artifactId>
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<version>1.26.0-alpha</version>
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</dependency>
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</dependencies>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-bom</artifactId>
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<version>1.26.0</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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</project>

‎codes/distributed/trace/opentelemetry/async/src/main/java/example/spring/trace/opentelemetry/DemoController.java‎

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package example.spring.trace.opentelemetry;
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import io.opentelemetry.api.GlobalOpenTelemetry;
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import io.opentelemetry.api.OpenTelemetry;
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import io.opentelemetry.api.trace.Span;
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import io.opentelemetry.api.trace.StatusCode;
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import io.opentelemetry.api.trace.Tracer;
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import io.opentelemetry.context.Context;
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import io.opentelemetry.context.Scope;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.web.servlet.context.ServletWebServerInitializedEvent;
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import org.springframework.context.ApplicationListener;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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@RestController
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public class DemoController implements ApplicationListener<ServletWebServerInitializedEvent> {
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private static final Log log = LogFactory.getLog(DemoController.class);
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private int port;
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@Autowired
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private DemoService userService;
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private ExecutorService executorService = Executors.newFixedThreadPool(5);
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private void biz() {
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Tracer tracer = OpenTelemetrySupport.getTracer();
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Span span = tracer.spanBuilder("biz (manual)")
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// 可选，自动设置
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.setParent(Context.current().with(Span.current()))
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.startSpan();
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try (Scope scope = span.makeCurrent()) {
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span.setAttribute("bizId", "111");
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executorService.submit(() -> {
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Span asyncSpan = tracer.spanBuilder("async")
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.setParent(Context.current().with(span))
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.startSpan();
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try {
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// some async jobs
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Thread.sleep(1000L);
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} catch (Throwable e) {
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e.printStackTrace();
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} finally {
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asyncSpan.end();
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}
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});
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// fake biz logic
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Thread.sleep(1000);
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System.out.println("biz done");
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OpenTelemetry openTelemetry = GlobalOpenTelemetry.get();
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openTelemetry.getPropagators();
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} catch (Throwable t) {
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span.setStatus(StatusCode.ERROR, "handle biz error");
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} finally {
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span.end();
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}
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}
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private void child(String userType) {
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Span span = OpenTelemetrySupport.getTracer().spanBuilder("ChildSpan").startSpan();
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try (Scope scope = span.makeCurrent()) {
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span.setAttribute("user.type", userType);
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biz();
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} catch (Throwable t) {
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span.setStatus(StatusCode.ERROR, "handle child span error");
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} finally {
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span.end();
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}
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}
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@RequestMapping("/async")
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public String async() {
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System.out.println("UserController.async -- " + Thread.currentThread().getId());
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Span span = OpenTelemetrySupport.getTracer().spanBuilder("ParentSpan").startSpan();
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span.setAttribute("user.id", "123456");
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try (Scope scope = span.makeCurrent()) {
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userService.async();
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child("vip");
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} catch (Throwable t) {
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span.setStatus(StatusCode.ERROR, "handle parent span error");
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} finally {
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span.end();
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}
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return "async";
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}
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@Override
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public void onApplicationEvent(ServletWebServerInitializedEvent event) {
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this.port = event.getSource().getPort();
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}
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}

‎codes/distributed/trace/opentelemetry/async/src/main/java/example/spring/trace/opentelemetry/DemoService.java‎

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package example.spring.trace.opentelemetry;
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import org.springframework.scheduling.annotation.Async;
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import org.springframework.stereotype.Service;
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@Service
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public class DemoService {
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@Async
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public void async() {
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System.out.println("DemoService.async begin. thread: " + Thread.currentThread().getId());
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System.out.println("DemoService.async end. ");
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}
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}

‎codes/distributed/trace/opentelemetry/async/src/main/java/example/spring/trace/opentelemetry/OpenTelemetrySupport.java‎

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package example.spring.trace.opentelemetry;
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import io.opentelemetry.api.OpenTelemetry;
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import io.opentelemetry.api.common.Attributes;
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import io.opentelemetry.api.trace.Tracer;
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import io.opentelemetry.api.trace.propagation.W3CTraceContextPropagator;
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import io.opentelemetry.context.propagation.ContextPropagators;
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import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter;
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import io.opentelemetry.sdk.OpenTelemetrySdk;
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import io.opentelemetry.sdk.resources.Resource;
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import io.opentelemetry.sdk.trace.SdkTracerProvider;
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import io.opentelemetry.sdk.trace.export.BatchSpanProcessor;
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import io.opentelemetry.semconv.resource.attributes.ResourceAttributes;
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/**
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* OpenTelemetry 支持类
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*
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* @author <a href="mailto:forbreak@163.com">Zhang Peng</a>
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* @date 2023-05-24
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*/
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public class OpenTelemetrySupport {
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private static final Tracer tracer;
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private static final OpenTelemetry openTelemetry;
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public static final String SERVICE_NAME = "opentelemetry-test";
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static {
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Resource resource = Resource.getDefault()
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.merge(Resource.create(Attributes.of(
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ResourceAttributes.SERVICE_NAME, SERVICE_NAME
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// ResourceAttributes.HOST_NAME, "<host-name>"
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)));
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SdkTracerProvider sdkTracerProvider =
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SdkTracerProvider.builder()
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.addSpanProcessor(BatchSpanProcessor.builder(OtlpGrpcSpanExporter.builder().build()).build())
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.setResource(resource)
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.build();
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openTelemetry = OpenTelemetrySdk.builder()
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.setTracerProvider(sdkTracerProvider)
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.setPropagators(ContextPropagators.create(W3CTraceContextPropagator.getInstance()))
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.buildAndRegisterGlobal();
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tracer = openTelemetry.getTracer("my-trace", "1.0.0");
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}
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public static Tracer getTracer() {
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return tracer;
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}
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public static OpenTelemetry getOpenTelemetry() {
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return openTelemetry;
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}
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}

‎codes/distributed/trace/opentelemetry/async/src/main/java/example/spring/trace/opentelemetry/OpenTelemetryWebApplication.java‎

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package example.spring.trace.opentelemetry;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.scheduling.annotation.EnableAsync;
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@EnableAsync
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@SpringBootApplication
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public class OpenTelemetryWebApplication {
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public static void main(String[] args) {
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SpringApplication.run(OpenTelemetryWebApplication.class, args);
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}
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}

‎codes/distributed/trace/opentelemetry/http/client/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.7.7</version>
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<relativePath />
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</parent>
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<groupId>io.github.dunwu.springcloud</groupId>
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<artifactId>spring-opentelemetry-http-client</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<name>Spring::分布式::链路追踪::OpenTelemetry::Http::Client</name>
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<description>OpenTelemetry Http 手动埋点、传播的客户端示例</description>
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<dependencies>
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<!-- Spring Web 的 Spring Boot 启动包，完成 Web 相关的自动化配置 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<!-- Spring Test 的 Spring Boot 启动包，提供了一些便利的测试工具集 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<!--OpenTelemetry SDK-->
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-api</artifactId>
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</dependency>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-sdk</artifactId>
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</dependency>
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<!--opentelemetry 可选包，引入后，提供 LoggingSpanExporter，支持配置将数据以日志形式打印-->
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-exporter-logging</artifactId>
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</dependency>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-semconv</artifactId>
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<version>1.26.0-alpha</version>
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</dependency>
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<!--流行的工具包集-->
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<dependency>
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<groupId>cn.hutool</groupId>
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<artifactId>hutool-all</artifactId>
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<version>5.5.9</version>
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</dependency>
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</dependencies>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.opentelemetry</groupId>
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<artifactId>opentelemetry-bom</artifactId>
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<version>1.26.0</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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</project>

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