initial code version

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "java.compile.nullAnalysis.mode": "automatic"
+}

labs/automatic-instrumentation/auto-instrumentation/initial/.gitignore

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+HELP.md
+**target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+*.jar
+
+__pycache__
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+opentelemetry-javaagent.jar

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/Dockerfile

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+FROM docker.io/maven:3-eclipse-temurin-21 as build
+WORKDIR /workspace/app
+
+COPY pom.xml .
+COPY src src
+
+RUN --mount=type=cache,target=/root/.m2 mvn install -DskipTests
+RUN mkdir -p target/dependency && (cd target/dependency; jar -xf ../*.jar)
+
+FROM docker.io/eclipse-temurin:21-jdk-alpine
+RUN mkdir -p /opt/todobackend
+WORKDIR /opt/todobackend
+#RUN addgroup -S demo && adduser -S demo -G demo
+#USER demo
+VOLUME /tmp
+ARG DEPENDENCY=/workspace/app/target/dependency
+COPY --from=build ${DEPENDENCY}/BOOT-INF/lib /opt/todobackend/app/lib
+COPY --from=build ${DEPENDENCY}/META-INF /opt/todobackend/app/META-INF
+COPY --from=build ${DEPENDENCY}/BOOT-INF/classes /opt/todobackend/app
+
+ADD  https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/latest/download/opentelemetry-javaagent.jar /opt/todobackend
+
+ENTRYPOINT ["java", "-cp", "/opt/todobackend/app:/opt/todobackend/app/lib/*",  "-javaagent:/opt/todobackend/opentelemetry-javaagent.jar","io.novatec.todobackend.TodobackendApplication"]

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/pom.xml

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+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.2.2</version>
+		<relativePath /> <!-- lookup parent from repository -->
+	</parent>
+
+	<groupId>io.novatec</groupId>
+	<artifactId>todobackend</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>todobackend</name>
+	<description>Novatec Demo Application</description>
+
+	<properties>
+		<java.version>21</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springdoc</groupId>
+			<artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
+			<version>2.2.0</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/src/main/java/io/novatec/todobackend/TodobackendApplication.java

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+package io.novatec.todobackend;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.web.bind.annotation.*;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+
+@SpringBootApplication
+@RestController
+@CrossOrigin(origins = "*")
+
+public class TodobackendApplication {
+
+	private Logger logger = LoggerFactory.getLogger(TodobackendApplication.class);
+
+	@Value("${HOSTNAME:not_set}")
+	String hostname;
+
+	@Value("${spring.profiles.active: none}")
+	String profile;
+
+	@Autowired
+	TodoRepository todoRepository;
+
+	private String getInstanceId() {
+
+		if (!hostname.equals("not_set"))
+			return hostname;
+		return "probably localhost";
+
+	}
+
+	@GetMapping("/hello")
+	String hello() {
+
+		return getInstanceId() + " Hallo, Welt ! ";
+
+	}
+
+	@GetMapping("/fail")
+	String fail() {
+
+		System.exit(1);
+		return "fixed!";
+	}
+
+	@GetMapping("/todos/")
+	List<String> getTodos(){
+
+		List<String> todos = new ArrayList<String>();
+
+		todoRepository.findAll().forEach(todo -> todos.add(todo.getTodo()));
+		logger.info("GET /todos/ "+todos.toString());
+
+
+		return todos;
+	}
+
+	@PostMapping("/todos/{todo}")
+	String addTodo(@PathVariable String todo){
+
+		this.someInternalMethod(todo);
+		//todoRepository.save(new Todo(todo));
+		logger.info("POST /todos/ "+todo.toString());
+
+		return todo;
+
+	}
+
+	String someInternalMethod(String todo){
+
+		todoRepository.save(new Todo(todo));
+		if(todo.equals("slow")){
+			try {
+				Thread.sleep(1000);
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+		} 		
+		if(todo.equals("fail")){
+
+			System.out.println("Failing ...");
+			throw new RuntimeException();
+
+		} 
+		return todo;
+
+	}
+
+	@DeleteMapping("/todos/{todo}")
+	String removeTodo(@PathVariable String todo) {
+
+		todoRepository.deleteById(todo);
+		logger.info("DELETE /todos/ "+todo.toString());
+		return "removed "+todo;
+
+	}
+
+	public static void main(String[] args) {
+		SpringApplication.run(TodobackendApplication.class, args);
+	}
+}
+
+@Entity
+class Todo{
+
+	@Id
+	String todo;
+
+	public Todo(){}
+
+	public Todo(String todo){
+		this.todo = todo;
+	}
+
+	public String getTodo(){
+		return todo;
+	}
+
+	public void setTodo(String todo) {
+		this.todo = todo;
+	}
+
+}
+
+interface TodoRepository extends CrudRepository<Todo, String> {
+
+}

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/src/main/resources/application-dev.properties

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+spring.h2.console.enabled=true
+spring.h2.console.path=/h2
+spring.datasource.url=jdbc:h2:mem:testdb 
+spring.datasource.username=sa
+spring.datasource.password=

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/src/main/resources/application-prod.properties

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+spring.datasource.url= jdbc:postgresql://${POSTGRES_HOST:postgresdb}:5432/mydb 
+spring.datasource.username=matthias
+spring.datasource.password=password

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/src/main/resources/application.properties

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+server.port=8080
+
+server.forward-headers-strategy=native
+management.endpoints.web.exposure.include=*
+
+spring.profiles.active=dev
+
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=true
+#spring.jpa.properties.hibernate.format_sql=true
+
+spring.application.name=springboot-backend 
+otel.exporter.otlp.endpoint=http://${COLLECTOR_HOST:localhost}:4317

labs/automatic-instrumentation/auto-instrumentation/initial/todobackend-springboot/src/test/java/io/novatec/todobackend/TodobackendApplicationIntegrationTests.java

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+package io.novatec.todobackend;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+public class TodobackendApplicationIntegrationTests {
+
+    @Test
+    void contextLoads() {
+    }
+}