Added simple Quarkus chat services using OpenAI.

.gitignore

@@ -17,5 +17,9 @@ gradle-app.setting
 # Eclipse Gradle plugin generated files
 # Eclipse Core
 .project
+
 # JDT-specific (Eclipse Java Development Tools)
 .classpath
+
+.vscode/
+.DS_Store

infrastructure/platform/openai-proxy/deployment.yaml

@@ -18,6 +18,7 @@ spec:
       containers:
       - name: openai-proxy
         image: ghcr.io/lreimer/k8s-native-java-ai-openai-proxy:main
+        imagePullPolicy: Always
         ports:
         - name: http
           containerPort: 10000

openai-chat-service/.dockerignore

@@ -0,0 +1,5 @@
+*
+!build/*-runner
+!build/*-runner.jar
+!build/lib/*
+!build/quarkus-app/*

openai-chat-service/.gitignore

@@ -0,0 +1,41 @@
+# Gradle
+.gradle/
+build/
+
+# Eclipse
+.project
+.classpath
+.settings/
+bin/
+
+# IntelliJ
+.idea
+*.ipr
+*.iml
+*.iws
+
+# NetBeans
+nb-configuration.xml
+
+# Visual Studio Code
+.vscode
+.factorypath
+
+# OSX
+.DS_Store
+
+# Vim
+*.swp
+*.swo
+
+# patch
+*.orig
+*.rej
+
+# Local environment
+.env
+
+# Plugin directory
+/.quarkus/cli/plugins/
+# TLS Certificates
+.certs/

openai-chat-service/README.md

@@ -0,0 +1,95 @@
+# java-ai-openai-service
+
+This project uses Quarkus, the Supersonic Subatomic Java Framework.
+
+If you want to learn more about Quarkus, please visit its website: <https://quarkus.io/>.
+
+## Running the application in dev mode
+
+You can run your application in dev mode that enables live coding using:
+
+```shell script
+./gradlew quarkusDev
+```
+
+> **_NOTE:_**  Quarkus now ships with a Dev UI, which is available in dev mode only at <http://localhost:8080/q/dev/>.
+
+## Packaging and running the application
+
+The application can be packaged using:
+
+```shell script
+./gradlew build
+```
+
+It produces the `quarkus-run.jar` file in the `build/quarkus-app/` directory.
+Be aware that it’s not an _über-jar_ as the dependencies are copied into the `build/quarkus-app/lib/` directory.
+
+The application is now runnable using `java -jar build/quarkus-app/quarkus-run.jar`.
+
+If you want to build an _über-jar_, execute the following command:
+
+```shell script
+./gradlew build -Dquarkus.package.jar.type=uber-jar
+```
+
+The application, packaged as an _über-jar_, is now runnable using `java -jar build/*-runner.jar`.
+
+## Creating a native executable
+
+You can create a native executable using:
+
+```shell script
+./gradlew build -Dquarkus.native.enabled=true
+```
+
+Or, if you don't have GraalVM installed, you can run the native executable build in a container using:
+
+```shell script
+./gradlew build -Dquarkus.native.enabled=true -Dquarkus.native.container-build=true
+```
+
+You can then execute your native executable with: `./build/java-ai-openai-service-1.0.0-SNAPSHOT-runner`
+
+If you want to learn more about building native executables, please consult <https://quarkus.io/guides/gradle-tooling>.
+
+## Related Guides
+
+- REST ([guide](https://quarkus.io/guides/rest)): A Jakarta REST implementation utilizing build time processing and Vert.x. This extension is not compatible with the quarkus-resteasy extension, or any of the extensions that depend on it.
+- LangChain4j Easy RAG ([guide](https://docs.quarkiverse.io/quarkus-langchain4j/dev/index.html)): Provides the Easy RAG functionality with LangChain4j
+- Quarkus LangChain4j pgvector embedding store ([guide](https://docs.quarkiverse.io/quarkus-langchain4j/dev/index.html)): Provides the pgvector Embedding store for Quarkus LangChain4j
+- LangChain4j ([guide](https://docs.quarkiverse.io/quarkus-langchain4j/dev/index.html)): Provides the basic integration with LangChain4j
+- LangChain4j Ollama ([guide](https://docs.quarkiverse.io/quarkus-langchain4j/dev/index.html)): Provides the basic integration of Ollama with LangChain4j
+- LangChain4j OpenAI ([guide](https://docs.quarkiverse.io/quarkus-langchain4j/dev/index.html)): Provides the basic integration with LangChain4j
+
+## Provided Code
+
+### LangChain4j Easy RAG
+
+This code is a very basic sample service to start developing with Quarkus LangChain4j using Easy RAG.
+
+This code is set up to use OpenAI as the LLM, thus you need to set the `QUARKUS_LANGCHAIN4J_OPENAI_API_KEY` environment variable to your OpenAI API key.
+
+In `./easy-rag-catalog/` you can find a set of example documents that will be used to create the RAG index which the bot (`src/main/java/org/acme/Bot.java`) will ingest.
+
+On first run, the bot will create the RAG index and store it in `easy-rag-catalog.json` file and reuse it on subsequent runs.
+This can be disabled by setting the `quarkus.langchain4j.easy-rag.reuse-embeddings.enabled` property to `false`.
+
+Add it to a Rest endpoint:
+```java
+    @Inject
+    Bot bot;
+
+    @POST
+    @Produces(MediaType.TEXT_PLAIN)
+    public String chat(String q) {
+        return bot.chat(q);
+    }
+```
+
+In a more complete example, you would have a web interface and use websockets that would provide more interactive experience, see [ChatBot Easy RAG Sample](https://github.com/quarkiverse/quarkus-langchain4j/tree/main/samples/chatbot-easy-rag) for such an example.
+### REST
+
+Easily start your REST Web Services
+
+[Related guide section...](https://quarkus.io/guides/getting-started-reactive#reactive-jax-rs-resources)

openai-chat-service/build.gradle

@@ -0,0 +1,42 @@
+plugins {
+    id 'java'
+    id 'io.quarkus'
+}
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+dependencies {
+    implementation enforcedPlatform("${quarkusPlatformGroupId}:${quarkusPlatformArtifactId}:${quarkusPlatformVersion}")
+
+    implementation 'io.quarkus:quarkus-rest'
+    implementation 'io.quarkiverse.langchain4j:quarkus-langchain4j-core:0.22.0'
+    implementation 'io.quarkiverse.langchain4j:quarkus-langchain4j-openai:0.22.0'
+    implementation 'io.quarkus:quarkus-arc'
+
+    testImplementation 'io.quarkus:quarkus-junit5'
+    testImplementation 'io.rest-assured:rest-assured'
+}
+
+group 'de.qaware.demo'
+version '1.0.0'
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}
+
+test {
+    systemProperty "java.util.logging.manager", "org.jboss.logmanager.LogManager"
+}
+
+compileJava {
+    options.encoding = 'UTF-8'
+    options.compilerArgs << '-parameters'
+}
+
+compileTestJava {
+    options.encoding = 'UTF-8'
+}

openai-chat-service/gradle.properties

@@ -0,0 +1,7 @@
+# Gradle properties
+
+quarkusPluginId=io.quarkus
+quarkusPluginVersion=3.17.2
+quarkusPlatformGroupId=io.quarkus.platform
+quarkusPlatformArtifactId=quarkus-bom
+quarkusPlatformVersion=3.17.2

openai-chat-service/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists