Resolves #17385

- Moves REST Client filter into a separate hidden extension
- Uses Quarkus conditional dependency handling to only include the OpenTelemetry Rest Client extension if `quarkus-rest-client` is present in user application

bom/application/pom.xml

@@ -2449,6 +2449,16 @@
                 <artifactId>quarkus-opentelemetry</artifactId>
                 <version>${project.version}</version>
             </dependency>
+            <dependency>
+                <groupId>io.quarkus</groupId>
+                <artifactId>quarkus-opentelemetry-rest-client-deployment</artifactId>
+                <version>${project.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.quarkus</groupId>
+                <artifactId>quarkus-opentelemetry-rest-client</artifactId>
+                <version>${project.version}</version>
+            </dependency>
             <dependency>
                 <groupId>io.quarkus</groupId>
                 <artifactId>quarkus-opentelemetry-exporter-jaeger-deployment</artifactId>

devtools/bom-descriptor-json/pom.xml

@@ -1670,6 +1670,19 @@
                         </exclusion>
                     </exclusions>
                 </dependency>
+                <dependency>
+                    <groupId>io.quarkus</groupId>
+                    <artifactId>quarkus-opentelemetry-rest-client</artifactId>
+                    <version>${project.version}</version>
+                    <type>pom</type>
+                    <scope>test</scope>
+                    <exclusions>
+                        <exclusion>
+                            <groupId>*</groupId>
+                            <artifactId>*</artifactId>
+                        </exclusion>
+                    </exclusions>
+                </dependency>
                 <dependency>
                     <groupId>io.quarkus</groupId>
                     <artifactId>quarkus-picocli</artifactId>

docs/pom.xml

@@ -1631,6 +1631,19 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-opentelemetry-rest-client-deployment</artifactId>
+            <version>${project.version}</version>
+            <type>pom</type>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-picocli-deployment</artifactId>

extensions/opentelemetry/opentelemetry/deployment/pom.xml

@@ -34,7 +34,7 @@
 
         <dependency>
             <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-rest-client-deployment</artifactId>
+            <artifactId>quarkus-opentelemetry-rest-client-deployment</artifactId>
             <optional>true</optional>
         </dependency>
 

extensions/opentelemetry/opentelemetry/runtime/pom.xml

@@ -36,7 +36,7 @@
 
         <dependency>
             <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-rest-client</artifactId>
+            <artifactId>quarkus-opentelemetry-rest-client</artifactId>
             <optional>true</optional>
         </dependency>
 

extensions/opentelemetry/pom.xml

@@ -16,5 +16,6 @@
     <modules>
         <module>opentelemetry</module>
         <module>opentelemetry-exporter-jaeger</module>
+        <module>rest-client</module>
     </modules>
 </project>

extensions/opentelemetry/rest-client/deployment/pom.xml

@@ -0,0 +1,73 @@
+<?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">
+    <parent>
+        <artifactId>quarkus-opentelemetry-rest-client-parent</artifactId>
+        <groupId>io.quarkus</groupId>
+        <version>999-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>quarkus-opentelemetry-rest-client-deployment</artifactId>
+    <name>Quarkus - OpenTelemetry - Rest Client - Deployment</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-opentelemetry-rest-client</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-core-deployment</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-arc-deployment</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-rest-client-deployment</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-junit5-internal</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.rest-assured</groupId>
+            <artifactId>rest-assured</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>io.quarkus</groupId>
+                            <artifactId>quarkus-extension-processor</artifactId>
+                            <version>${project.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

extensions/opentelemetry/rest-client/pom.xml

@@ -0,0 +1,20 @@
+<?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">
+    <parent>
+        <artifactId>quarkus-opentelemetry-parent-aggregator</artifactId>
+        <groupId>io.quarkus</groupId>
+        <version>999-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>quarkus-opentelemetry-rest-client-parent</artifactId>
+    <name>Quarkus - OpenTelemetry - Rest Client</name>
+    <packaging>pom</packaging>
+    <modules>
+        <module>deployment</module>
+        <module>runtime</module>
+    </modules>
+</project>

extensions/opentelemetry/rest-client/runtime/pom.xml

@@ -0,0 +1,73 @@
+<?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">
+    <parent>
+        <artifactId>quarkus-opentelemetry-rest-client-parent</artifactId>
+        <groupId>io.quarkus</groupId>
+        <version>999-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>quarkus-opentelemetry-rest-client</artifactId>
+    <name>Quarkus - OpenTelemetry - Rest Client - Runtime</name>
+    <description>OpenTelemetry tracing of Rest Client</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-arc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-rest-client</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.opentelemetry</groupId>
+            <artifactId>opentelemetry-sdk</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.opentelemetry</groupId>
+            <artifactId>opentelemetry-semconv</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>io.quarkus</groupId>
+                <artifactId>quarkus-bootstrap-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>process-resources</phase>
+                        <goals>
+                            <goal>extension-descriptor</goal>
+                        </goals>
+                        <configuration>
+                            <dependencyCondition>
+                                <artifact>io.quarkus:quarkus-rest-client</artifact>
+                            </dependencyCondition>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>io.quarkus</groupId>
+                            <artifactId>quarkus-extension-processor</artifactId>
+                            <version>${project.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

extensions/opentelemetry/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/tracing/client/ClientTracingFilter.java → extensions/opentelemetry/rest-client/runtime/src/main/java/io/quarkus/opentelemetry/restclient/ClientTracingFilter.java

@@ -1,4 +1,4 @@
-package io.quarkus.opentelemetry.runtime.tracing.client;
+package io.quarkus.opentelemetry.restclient;
 
 import java.io.IOException;
 

extensions/opentelemetry/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/tracing/client/QuarkusRestClientListener.java → extensions/opentelemetry/rest-client/runtime/src/main/java/io/quarkus/opentelemetry/restclient/QuarkusRestClientListener.java

@@ -1,4 +1,4 @@
-package io.quarkus.opentelemetry.runtime.tracing.client;
+package io.quarkus.opentelemetry.restclient;
 
 import javax.enterprise.inject.Instance;
 import javax.enterprise.inject.spi.CDI;

extensions/opentelemetry/rest-client/runtime/src/main/resources/META-INF/quarkus-extension.yaml

@@ -0,0 +1,16 @@
+---
+artifact: ${project.groupId}:${project.artifactId}:${project.version}
+name: "OpenTelemetry REST Client"
+metadata:
+  keywords:
+    - "opentelemetry"
+    - "tracing"
+    - "distributed-tracing"
+    - "monitoring"
+    - "rest client"
+    - "microprofile-rest-client"
+  guide: "https://quarkus.io/guides/opentelemetry"
+  categories:
+    - "observability"
+  unlisted: true
+  status: "experimental"

extensions/opentelemetry/rest-client/runtime/src/main/resources/META-INF/services/org.eclipse.microprofile.rest.client.spi.RestClientListener

@@ -0,0 +1 @@
+io.quarkus.opentelemetry.restclient.QuarkusRestClientListener