[BAEL-7321] Introduction to Brave (#16306)

spring-boot-modules/pom.xml

@@ -114,6 +114,7 @@
         <module>spring-boot-graalvm-docker</module>
         <module>spring-boot-validations</module>
         <module>spring-boot-openapi</module>
+        <module>spring-boot-brave</module>
     </modules>
 
     <dependencyManagement>

spring-boot-modules/spring-boot-brave/pom.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>spring-boot-brave</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <name>spring-boot-brave</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.zipkin.brave</groupId>
+            <artifactId>brave</artifactId>
+            <version>6.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>io.zipkin.reporter2</groupId>
+            <artifactId>zipkin-reporter</artifactId>
+            <version>3.3.0</version>
+        </dependency>
+        <dependency>
+            <groupId>io.zipkin.reporter2</groupId>
+            <artifactId>zipkin-sender-okhttp3</artifactId>
+            <version>3.3.0</version>
+        </dependency>
+        <dependency>
+            <groupId>io.zipkin.reporter2</groupId>
+            <artifactId>zipkin-reporter-brave</artifactId>
+            <version>3.3.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <skip>true</skip>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-boot-modules/spring-boot-brave/src/main/java/com/baeldung/brave/Application.java

@@ -0,0 +1,12 @@
+package com.baeldung.brave;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

spring-boot-modules/spring-boot-brave/src/main/java/com/baeldung/brave/configuration/TracingConfiguration.java

@@ -0,0 +1,36 @@
+package com.baeldung.brave.configuration;
+
+import brave.Tracer;
+import brave.Tracing;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import zipkin2.reporter.BytesMessageSender;
+import zipkin2.reporter.brave.AsyncZipkinSpanHandler;
+import zipkin2.reporter.okhttp3.OkHttpSender;
+
+@Configuration
+public class TracingConfiguration {
+
+    @Bean
+    BytesMessageSender sender() {
+        return OkHttpSender.create("http://127.0.0.1:9411/api/v2/spans");
+    }
+
+    @Bean
+    AsyncZipkinSpanHandler zipkinSpanHandler(BytesMessageSender sender) {
+        return AsyncZipkinSpanHandler.create(sender);
+    }
+
+    @Bean
+    public Tracing tracing(AsyncZipkinSpanHandler zipkinSpanHandler) {
+        return Tracing.newBuilder()
+                .localServiceName("Dummy Service")
+                .addSpanHandler(zipkinSpanHandler)
+                .build();
+    }
+
+    @Bean
+    public Tracer tracer(Tracing tracing) {
+        return tracing.tracer();
+    }
+}

spring-boot-modules/spring-boot-brave/src/main/java/com/baeldung/brave/service/TracingService.java

@@ -0,0 +1,28 @@
+package com.baeldung.brave.service;
+
+import brave.Span;
+import brave.Tracer;
+import jakarta.annotation.PostConstruct;
+import org.springframework.stereotype.Service;
+
+@Service
+public class TracingService {
+
+    private final Tracer tracer;
+
+    public TracingService(Tracer tracer) {
+        this.tracer = tracer;
+    }
+
+    @PostConstruct
+    private void postConstruct() {
+        Span span = tracer.nextSpan().name("Hello from Service").start();
+        try {
+            Thread.sleep(2000);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        } finally {
+            span.finish();
+        }
+    }
+}