GPULlama3.java examples for ChatModel. StreamingChatModel and Agentic

gpullama3.java-example/README.md

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+# Running GPULlama3 Example Directly with Java
+
+This guide explains how to run the `GPULlama3ChatModelExample` program **without using the Tornado launcher**, directly with `java`, using TornadoVM flags and the Maven-built JAR and dependencies.
+
+---
+
+## **Step 0 — Configure Local LLMs**
+
+To download GPULlama3.java compatible LLMs, follow the instructions in the [GPULlama3.java README](https://github.com/beehive-lab/GPULlama3.java/blob/main/README.md).
+
+For example to get llama3.2-1b:
+```bash
+wget https://huggingface.co/beehive-lab/Llama-3.2-1B-Instruct-GGUF-FP16/resolve/main/beehive-llama-3.2-1b-instruct-fp16.gguf
+```
+
+Export an environment variable:
+
+```bash
+export LOCAL_LLMS_PATH=/path/to/downloaded/local/llms
+```
+
+This environment variable will be used by the example applications.
+
+## **Step 1 — Get Tornado JVM flags**
+
+Run the following command (You need to have Tornado installed):
+
+```bash
+tornado --printJavaFlags
+```
+
+Example output:
+
+```bash
+/home/mikepapadim/.sdkman/candidates/java/current/bin/java -server \
+-XX:-UseCompressedOops -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI \
+-XX:-UseCompressedClassPointers --enable-preview \
+-Djava.library.path=/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/lib \
+--module-path .:/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/share/java/tornado \
+-Dtornado.load.api.implementation=uk.ac.manchester.tornado.runtime.tasks.TornadoTaskGraph \
+-Dtornado.load.runtime.implementation=uk.ac.manchester.tornado.runtime.TornadoCoreRuntime \
+-Dtornado.load.tornado.implementation=uk.ac.manchester.tornado.runtime.common.Tornado \
+-Dtornado.load.annotation.implementation=uk.ac.manchester.tornado.annotation.ASMClassVisitor \
+-Dtornado.load.annotation.parallel=uk.ac.manchester.tornado.api.annotations.Parallel \
+--upgrade-module-path /home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/share/java/graalJars \
+-XX:+UseParallelGC \
+@/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/etc/exportLists/common-exports \
+@/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/etc/exportLists/opencl-exports \
+--add-modules ALL-SYSTEM,tornado.runtime,tornado.annotation,tornado.drivers.common,tornado.drivers.opencl
+```
+
+## **Step 2 — Build the Maven classpath**
+
+First, build agentic-tutorial which is a dependency of gpullama3.java-example.
+
+```bash
+cd langchain4j-examples/agentic-tutorial
+mvn clean install
+```
+
+From the project root, run:
+
+```bash
+mvn dependency:build-classpath -Dmdep.outputFile=cp.txt
+```
+
+## **Step 3 — Build the Maven classpath**
+
+```bash
+mvn clean package
+```
+
+Your main JAR will be located at:
+```bash
+target/gpullama3.java-example-1.4.0-beta10.jar
+```
+
+## **Step 4 — Run the program directly with Java**
+You can now run the example with all JVM and Tornado flags:
+
+```bash
+JAVA_BIN=/home/mikepapadim/.sdkman/candidates/java/current/bin/java
+CP="target/gpullama3.java-example-1.4.0-beta10.jar:$(cat cp.txt)"
+
+$JAVA_BIN \
+  -server \
+  -XX:-UseCompressedOops \
+  -XX:+UnlockExperimentalVMOptions \
+  -XX:+EnableJVMCI \
+  --enable-preview \
+  -Djava.library.path=/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/lib \
+  --module-path .:/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/share/java/tornado \
+  -Dtornado.load.api.implementation=uk.ac.manchester.tornado.runtime.tasks.TornadoTaskGraph \
+  -Dtornado.load.runtime.implementation=uk.ac.manchester.tornado.runtime.TornadoCoreRuntime \
+  -Dtornado.load.tornado.implementation=uk.ac.manchester.tornado.runtime.common.Tornado \
+  -Dtornado.load.annotation.implementation=uk.ac.manchester.tornado.annotation.ASMClassVisitor \
+  -Dtornado.load.annotation.parallel=uk.ac.manchester.tornado.api.annotations.Parallel \
+  --upgrade-module-path /home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/share/java/graalJars \
+  -XX:+UseParallelGC \
+  @/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/etc/exportLists/common-exports \
+  @/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/etc/exportLists/opencl-exports \
+  --add-modules ALL-SYSTEM,tornado.runtime,tornado.annotation,tornado.drivers.common,tornado.drivers.opencl \
+  -Duse.tornadovm=true \
+  -Xms6g -Xmx6g \
+  -Dtornado.device.memory=6GB \
+  -cp "$CP" \
+  GPULlama3ChatModelExample
+
+```
+
+### Optional: Create a shell script
+You can save the above command as run-direct.sh and run it with:
+```bash
+bash run-direct.sh
+```
+
+
+### Optional: Run the program with TornadoVM
+```bash
+/home/mikepapadim/.sdkman/candidates/java/current/bin/java \
+  -server \
+  -XX:-UseCompressedOops \
+  -XX:+UnlockExperimentalVMOptions \
+  -XX:+EnableJVMCI \
+  --enable-preview \
+  -Djava.library.path=/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/lib \
+  --module-path .:/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/share/java/tornado \
+  -Dtornado.load.api.implementation=uk.ac.manchester.tornado.runtime.tasks.TornadoTaskGraph \
+  -Dtornado.load.runtime.implementation=uk.ac.manchester.tornado.runtime.TornadoCoreRuntime \
+  -Dtornado.load.tornado.implementation=uk.ac.manchester.tornado.runtime.common.Tornado \
+  -Dtornado.load.annotation.implementation=uk.ac.manchester.tornado.annotation.ASMClassVisitor \
+  -Dtornado.load.annotation.parallel=uk.ac.manchester.tornado.api.annotations.Parallel \
+  --upgrade-module-path /home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/share/java/graalJars \
+  -XX:+UseParallelGC \
+  @/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/etc/exportLists/common-exports \
+  @/home/mikepapadim/java-ai-demos/GPULlama3.java/external/tornadovm/bin/sdk/etc/exportLists/opencl-exports \
+  --add-modules ALL-SYSTEM,tornado.runtime,tornado.annotation,tornado.drivers.common,tornado.drivers.opencl \
+  -Xms6g \
+  -Xmx6g \
+  -Dtornado.device.memory=6GB \
+  -cp "target/gpullama3.java-example-1.4.0-beta10.jar:/home/mikepapadim/.m2/repository/dev/langchain4j/langchain4j-core/1.5.0-SNAPSHOT/langchain4j-core-1.5.0-SNAPSHOT.jar:/home/mikepapadim/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.19.2/jackson-annotations-2.19.2.jar:/home/mikepapadim/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.19.2/jackson-core-2.19.2.jar:/home/mikepapadim/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.19.2/jackson-databind-2.19.2.jar:/home/mikepapadim/.m2/repository/org/slf4j/slf4j-api/2.0.17/slf4j-api-2.0.17.jar:/home/mikepapadim/.m2/repository/org/jspecify/jspecify/1.0.0/jspecify-1.0.0.jar:/home/mikepapadim/.m2/repository/dev/langchain4j/langchain4j-gpu-llama3/1.5.0-SNAPSHOT/langchain4j-gpu-llama3-1.5.0-SNAPSHOT.jar:/home/mikepapadim/.m2/repository/org/beehive/gpullama3/gpu-llama3/2.0-SNAPSHOT/gpu-llama3-2.0-SNAPSHOT.jar" \
+  GPULlama3StreamingChatModelExample
+
+```
+
+### Run agentic examples:
+
+###### Note: Make sure you have the agentic-tutorial project built first (see step 2).
+
+1) Run GPULlama3_1a_Basic_Agent_Example on GPU:
+
+```bash
+tornado -cp target/gpullamas.java-example-1.7.1-beta14.jar:$(cat cp.txt) \
+agentic._1_basic_agent.GPULlama3_1a_Basic_Agent_Example GPU
+```
+
+2) Run GPULlama3_1b_Basic_Agent_Example_Structured on GPU:
+
+```bash
+tornado -cp target/gpullamas.java-example-1.7.1-beta14.jar:$(cat cp.txt) \
+agentic._1_basic_agent.GPULlama3_1b_Basic_Agent_Example_Structured GPU
+```
+
+3) Run GPULlama3_2a_Sequential_Agent_Example on GPU:
+
+```bash
+tornado -cp target/gpullamas.java-example-1.7.1-beta14.jar:$(cat cp.txt) \
+agentic._2_sequential_workflow.GPULlama3_2a_Sequential_Agent_Example GPU
+```

gpullama3.java-example/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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>dev.langchain4j</groupId>
+        <artifactId>langchain4j-examples</artifactId>
+        <version>1.7.1-beta14</version>
+    </parent>
+
+    <artifactId>gpullama3.java-example</artifactId>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <langchain4j.version>1.7.1</langchain4j.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>3.3.0</version>
+                <configuration>
+                    <executable>${java.home}/bin/java</executable>
+                    <mainClass>GPULlama3ChatModelExample</mainClass>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <!-- Core API (ChatModel, etc.) -->
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-core</artifactId>
+            <version>${langchain4j.version}</version>
+        </dependency>
+
+        <!-- GPU-accelerated Llama 3 -->
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-gpu-llama3</artifactId>
+            <version>1.7.1-beta14</version>
+        </dependency>
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-gpu-llama3</artifactId>
+            <version>1.7.1-beta14</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-agentic</artifactId>
+            <version>1.7.1-beta14</version>
+        </dependency>
+
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>agentic-tutorial</artifactId>
+            <version>1.7.1</version> <!-- Match the version in agentic-tutorial's POM -->
+        </dependency>
+    </dependencies>
+</project>

gpullama3.java-example/src/main/java/GPULlama3ChatModelExample.java

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+import dev.langchain4j.data.message.SystemMessage;
+import dev.langchain4j.data.message.UserMessage;
+import dev.langchain4j.model.chat.request.ChatRequest;
+import dev.langchain4j.model.chat.response.ChatResponse;
+import dev.langchain4j.model.gpullama3.GPULlama3ChatModel;
+
+import java.nio.file.Path;
+
+public class GPULlama3ChatModelExample {
+
+    public static void main(String[] args) {
+
+        // Read path to your *local* model files.
+        String localLLMsPath = System.getenv("LOCAL_LLMS_PATH");
+
+        // Check if the environment variable is set
+        if (localLLMsPath == null || localLLMsPath.isEmpty()) {
+            System.err.println("Error: LOCAL_LLMS_PATH environment variable is not set.");
+            System.err.println("Please set this environment variable to the directory containing your local model files.");
+            System.exit(1);
+        }
+
+        // Change this model file name to choose any of your *local* model files.
+        // Supports Mistral, Llama3, Phi-3, Qwen2.5 and Qwen3 in gguf format.
+        String modelFile = "beehive-llama-3.2-1b-instruct-fp16.gguf";
+        Path modelPath = Path.of(localLLMsPath, modelFile);
+
+        String prompt;
+
+        if (args.length > 0) {
+            prompt = args[0];
+            System.out.println("User Prompt: " + prompt);
+        } else {
+            prompt = "What is the capital of France?";
+            System.out.println("Example Prompt: " + prompt);
+        }
+
+
+
+        System.out.println("Path: " + modelPath);
+
+        // @formatter:off
+        ChatRequest request = ChatRequest.builder().messages(
+                UserMessage.from(prompt),
+                SystemMessage.from("reply with extensive sarcasm"))
+                .build();
+
+        //Path modelPath = Paths.get("beehive-llama-3.2-1b-instruct-fp16.gguf");
+
+
+        GPULlama3ChatModel model = GPULlama3ChatModel.builder()
+                .modelPath(modelPath)
+                .onGPU(Boolean.TRUE) //if false, runs on CPU though a lightweight implementation of llama3.java
+                .build();
+        // @formatter:on
+
+        ChatResponse response = model.chat(request);
+        System.out.println("\n" + response.aiMessage().text());
+
+        //Optionally print metrics
+        model.printLastMetrics();
+    }
+}

gpullama3.java-example/src/main/java/GPULlama3StreamingChatModelExample.java

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+import dev.langchain4j.data.message.SystemMessage;
+import dev.langchain4j.data.message.UserMessage;
+import dev.langchain4j.model.chat.request.ChatRequest;
+import dev.langchain4j.model.chat.response.ChatResponse;
+import dev.langchain4j.model.chat.response.StreamingChatResponseHandler;
+import dev.langchain4j.model.gpullama3.GPULlama3StreamingChatModel;
+
+import java.nio.file.Path;
+import java.util.concurrent.CompletableFuture;
+
+public class GPULlama3StreamingChatModelExample {
+
+    public static void main(String[] args) {
+        // Read path to your *local* model files.
+        String localLLMsPath = System.getenv("LOCAL_LLMS_PATH");
+
+        // Check if the environment variable is set
+        if (localLLMsPath == null || localLLMsPath.isEmpty()) {
+            System.err.println("Error: LOCAL_LLMS_PATH environment variable is not set.");
+            System.err.println("Please set this environment variable to the directory containing your local model files.");
+            System.exit(1);
+        }
+
+        // Change this model file name to choose any of your *local* model files.
+        // Supports Mistral, Llama3, Phi-3, Qwen2.5 and Qwen3 in gguf format.
+        String modelFile = "beehive-llama-3.2-1b-instruct-fp16.gguf";
+        Path modelPath = Path.of(localLLMsPath, modelFile);
+
+        String prompt;
+
+        if (args.length > 0) {
+            prompt = args[0];
+            System.out.println("User Prompt: " + prompt);
+        } else {
+            prompt = "What is the capital of France?";
+            System.out.println("Example Prompt: " + prompt);
+        }
+
+        // @formatter:off
+        ChatRequest request = ChatRequest.builder().messages(
+                        UserMessage.from(prompt),
+                        SystemMessage.from("reply with extensive sarcasm"))
+                .build();
+
+        GPULlama3StreamingChatModel model = GPULlama3StreamingChatModel.builder()
+                .onGPU(Boolean.TRUE) // if false, runs on CPU though a lightweight implementation of llama3.java
+                .modelPath(modelPath)
+                .build();
+        // @formatter:on
+
+        CompletableFuture<ChatResponse> futureResponse = new CompletableFuture<>();
+
+        model.chat(request, new StreamingChatResponseHandler() {
+
+            @Override
+            public void onPartialResponse(String partialResponse) {
+                System.out.print(partialResponse);
+            }
+
+            @Override
+            public void onCompleteResponse(ChatResponse completeResponse) {
+                futureResponse.complete(completeResponse);
+                model.printLastMetrics();
+            }
+
+            @Override
+            public void onError(Throwable error) {
+                futureResponse.completeExceptionally(error);
+            }
+        });
+
+        futureResponse.join();
+    }
+}