feat: Update Quarkus sample to use new quarkus-langfuse extension

applications/quarkus-langchain4j-demo/.mvn/wrapper/maven-wrapper.properties

@@ -1,19 +1,3 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-wrapperVersion=3.3.2
+wrapperVersion=3.3.4
 distributionType=only-script
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.15/apache-maven-3.9.15-bin.zip

applications/quarkus-langchain4j-demo/README.md

@@ -3,21 +3,27 @@
 ## Prerequisites
 
 - Java 21+
-- Langfuse stack ([Cloud](https://cloud.langfuse.com/) or [Self-Hosted](https://langfuse.com/docs/deployment/self-host))
-- Langfuse API Keys
 - An OpenAI Api Key
 
 ## How to run
 
-1. Configure environment variables to connect Spring AI demo app with Langfuse.
+1. Configure environment variables.
+
    ```
-   export QUARKUS_LANGCHAIN4J_OPENAI_API_KEY=sk-xxx-...
-   export QUARKUS_OTEL_EXPORTER_OTLP_ENDPOINT="https://cloud.langfuse.com/api/public/otel" # 🇪🇺 EU data region
-   # export QUARKUS_OTEL_EXPORTER_OTLP_ENDPOINT="https://us.cloud.langfuse.com/api/public/otel" # 🇺🇸 US data region
-   # export QUARKUS_OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:3000/api/public/otel" # 🏠 Local deployment (>= v3.22.0)
-   export QUARKUS_OTEL_EXPORTER_OTLP_HEADERS="Authorization=Basic $(echo -n "pk-lf-xxx:sk-lf-xxx" | base64)"
+   export OPENAI_API_KEY=sk-xxx-...
    ```
 2. Run the sample application via `./mvnw quarkus:dev`.
-3. Observe the new trace in the Langfuse web UI.
+3. You should see something in the logs like this, indicating the URL/credentials of Langfuse:
+
+   ```
+   Dev Services for Langfuse started.
+   Other applications in dev mode will find it automatically.
+   For Quarkus applications in production mode, you can connect to this instance by starting you application with -Dquarkus.langfuse.base-url=http://localhost:42971.
+   Log in with:
+     Email: quarkus@quarkus.io
+     Password: quarkuslangfuse 
+   ```
+
+4. Observe the new trace in the Langfuse web UI (indicated at the URL in the above message).
 
 ![sample-trace](./screenshots/quarkus-langchain4j-demo-trace.png)