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Use reusable containers #1

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51 changes: 19 additions & 32 deletions app/src/main/java/gemini/workshop/CallGemma.java
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Original file line number Diff line number Diff line change
@@ -1,46 +1,33 @@
package gemini.workshop;

import com.github.dockerjava.api.model.Image;
import com.github.dockerjava.api.command.InspectContainerResponse;
import dev.langchain4j.model.chat.ChatLanguageModel;
import dev.langchain4j.model.ollama.OllamaChatModel;
import org.testcontainers.DockerClientFactory;
import org.testcontainers.ollama.OllamaContainer;
import org.testcontainers.utility.DockerImageName;

import java.io.IOException;
import java.util.List;

public class CallGemma {

private static final String TC_OLLAMA_GEMMA_2_B = "tc-ollama-gemma-2b";

/** Creating an Ollama container with Gemma 2B if it doesn't exist. */
private static OllamaContainer createGemmaOllamaContainer() throws IOException, InterruptedException {

// check if the custom Gemma Ollama image exists already
List<Image> listImagesCmd = DockerClientFactory.lazyClient()
.listImagesCmd()
.withImageNameFilter(TC_OLLAMA_GEMMA_2_B)
.exec();

if (listImagesCmd.isEmpty()) {
System.out.println("Creating a new Ollama container with Gemma 2B image...");
OllamaContainer ollama = new OllamaContainer("ollama/ollama:0.1.26");
ollama.start();
ollama.execInContainer("ollama", "pull", "gemma:2b");
ollama.commitToImage(TC_OLLAMA_GEMMA_2_B);
return ollama;
} else {
System.out.println("Using existing Ollama container with Gemma 2B image...");
// Substitute the default Ollama image with our Gemma variant
return new OllamaContainer(
DockerImageName.parse(TC_OLLAMA_GEMMA_2_B)
.asCompatibleSubstituteFor("ollama/ollama"));
}
}

public static void main(String[] args) throws IOException, InterruptedException {
OllamaContainer ollama = createGemmaOllamaContainer();
OllamaContainer ollama = new OllamaContainer("ollama/ollama:0.1.26") {
{
withReuse(true);
}

@Override
protected void containerIsStarted(InspectContainerResponse containerInfo, boolean reused) {
if (reused) {
return;
}

try {
execInContainer("ollama", "pull", "gemma:2b");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
};
ollama.start();

ChatLanguageModel model = OllamaChatModel.builder()
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