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Add code assistant tutorial feature and improve code quality
New Features: - Added code-assistant tutorial module with 4 tools (generate, review, explain, debug code) - Created CodeAssistant.java with comprehensive code assistance capabilities - Added detailed README with setup and usage instructions - Updated parent pom.xml to include new module Code Quality Improvements: - Fixed unsafe Optional.get() calls in Basic.java with orElseThrow() - Fixed unsafe Optional.get() calls in OutputSchema.java with proper error handling - Fixed unsafe Optional.get() calls in RequestConfirmationLlmRequestProcessor.java - Added meaningful error messages for IllegalStateException cases - Removed duplicate condition check - Removed unused logger imports Testing: - All 24 modules pass successfully (BUILD SUCCESS) - Manual testing performed on code assistant tutorial via web interface
1 parent 1bcb3de commit 46ef6dd

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Lines changed: 263 additions & 9 deletions

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‎core/src/main/java/com/google/adk/flows/llmflows/Basic.java‎

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@@ -39,9 +39,19 @@ public Single<RequestProcessor.RequestProcessingResult> processRequest(
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}
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LlmAgent agent = (LlmAgent) context.agent();
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String modelName =
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agent.resolvedModel().model().isPresent()
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? agent.resolvedModel().model().get().model()
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: agent.resolvedModel().modelName().get();
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agent
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.resolvedModel()
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.model()
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.map(model -> model.model())
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.orElseGet(
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() ->
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agent
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.resolvedModel()
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.modelName()
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.orElseThrow(
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() ->
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new IllegalStateException(
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"Both model and modelName are not present in resolvedModel")));
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LiveConnectConfig.Builder liveConnectConfigBuilder =
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LiveConnectConfig.builder().responseModalities(context.runConfig().responseModalities());

‎core/src/main/java/com/google/adk/flows/llmflows/OutputSchema.java‎

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@@ -58,7 +58,14 @@ public Single<RequestProcessingResult> processRequest(
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}
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// Add the set_model_response tool to handle structured output
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SetModelResponseTool setResponseTool = new SetModelResponseTool(agent.outputSchema().get());
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SetModelResponseTool setResponseTool =
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new SetModelResponseTool(
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agent
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.outputSchema()
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.orElseThrow(
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() ->
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new IllegalStateException(
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"outputSchema should be present when toolsUnion is not empty")));
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LlmRequest.Builder builder = request.toBuilder();
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return setResponseTool

‎core/src/main/java/com/google/adk/flows/llmflows/RequestConfirmationLlmRequestProcessor.java‎

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@@ -72,9 +72,12 @@ public Single<RequestProcessor.RequestProcessingResult> processRequest(
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return Single.just(RequestProcessingResult.create(llmRequest, ImmutableList.of()));
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}
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int finalConfirmationEventIndex = confirmationResult.get().eventIndex();
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ConfirmationResult result =
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confirmationResult.orElseThrow(
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() -> new IllegalStateException("confirmationResult should be present when not empty"));
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int finalConfirmationEventIndex = result.eventIndex();
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ImmutableMap<String, ToolConfirmation> requestConfirmationFunctionResponses =
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confirmationResult.get().responses();
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result.responses();
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// Search backwards from the event before confirmation for the corresponding
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// request_confirmation function calls emitted by the model.
@@ -97,10 +100,21 @@ public Single<RequestProcessor.RequestProcessingResult> processRequest(
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getOriginalFunctionCall(fc)
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.ifPresent(
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ofc -> {
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String functionId =
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ofc.id()
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.orElseThrow(
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() ->
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new IllegalStateException(
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"Function call should have an ID"));
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toolsToResumeWithConfirmation.put(
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ofc.id().get(),
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requestConfirmationFunctionResponses.get(fc.id().get()));
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toolsToResumeWithArgs.put(ofc.id().get(), ofc);
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functionId,
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requestConfirmationFunctionResponses.get(
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fc.id()
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.orElseThrow(
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() ->
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new IllegalStateException(
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"Function call should have an ID"))));
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toolsToResumeWithArgs.put(functionId, ofc);
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}));
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if (toolsToResumeWithConfirmation.isEmpty()) {

‎pom.xml‎

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@@ -35,6 +35,7 @@
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<module>contrib/firestore-session-service</module>
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<module>tutorials/city-time-weather</module>
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<module>tutorials/live-audio-single-agent</module>
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<module>tutorials/code-assistant</module>
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<module>a2a</module>
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</modules>
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‎tutorials/code-assistant/README.md‎

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# Code Assistant Agent
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A tutorial demonstrating how to build an AI code assistant agent using the Google ADK (Agent Development Kit). The agent can help with code review, debugging, generating code snippets, and explaining programming concepts.
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## Setup API Key
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```shell
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export GOOGLE_API_KEY={YOUR-KEY}
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```
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## Go to example directory
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```shell
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cd /google_adk/tutorials/code-assistant
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```
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## Running the Agent
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Start the server:
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```shell
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mvn exec:java -Dadk.agents.source-dir=$PWD
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```
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This starts the ADK web server with a code assistant agent (`code_assistant`) that can help with various programming tasks using the `gemini-2.0-flash` model.
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## Usage
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Once running, you can interact with the agent through:
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- **Web interface:** `http://localhost:8080`
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- **Agent name:** `code_assistant`
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- **Try asking:**
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- "Write a Java function to reverse a string"
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- "Review this code and suggest improvements"
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- "Explain what this code does"
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- "Help me debug this error"
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## Features
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This code assistant agent includes several useful tools:
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- **Code Generation**: Generate code snippets in various languages
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- **Code Review**: Analyze code and suggest improvements
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- **Code Explanation**: Explain what code does in simple terms
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- **Debugging Help**: Assist with identifying and fixing bugs
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- **Best Practices**: Provide guidance on coding best practices
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## Agent Capabilities
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The agent is designed to:
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- Understand programming questions and requests
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- Generate syntactically correct code
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- Provide explanations in clear, accessible language
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- Follow best practices and security guidelines
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- Handle multiple programming languages (Java, Python, JavaScript, etc.)
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## Learn More
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See https://google.github.io/adk-docs/get-started/quickstart/#java for more information.

‎tutorials/code-assistant/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!-- Copyright 2025 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. -->
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<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">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>com.google.adk</groupId>
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<artifactId>google-adk-parent</artifactId>
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<version>1.7.1-SNAPSHOT</version>
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<relativePath>../../pom.xml</relativePath>
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</parent>
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<artifactId>google-adk-tutorials-code-assistant</artifactId>
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<name>Agent Development Kit - Tutorial: Code Assistant</name>
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<description>Code Assistant Agent Tutorial</description>
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<dependencies>
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<dependency>
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<groupId>com.google.adk</groupId>
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<artifactId>google-adk-dev</artifactId>
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<version>${project.version}</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<configuration>
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<mainClass>com.google.adk.tutorials.CodeAssistant</mainClass>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎tutorials/code-assistant/src/main/java/com/google/adk/tutorials/CodeAssistant.java‎

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/*
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* Copyright 2025 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
14+
* limitations under the License.
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*/
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package com.google.adk.tutorials;
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import com.google.adk.agents.BaseAgent;
19+
import com.google.adk.agents.LlmAgent;
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import com.google.adk.tools.Annotations.Schema;
21+
import com.google.adk.tools.FunctionTool;
22+
import com.google.adk.web.AdkWebServer;
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import java.util.Map;
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public class CodeAssistant {
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27+
public static final BaseAgent ROOT_AGENT =
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LlmAgent.builder()
29+
.name("code_assistant")
30+
.model("gemini-2.0-flash")
31+
.description(
32+
"An AI code assistant that helps with code generation, review, debugging, and explanation.")
33+
.instruction(
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"You are a helpful code assistant with expertise in multiple programming languages including Java, Python, JavaScript, and more. "
35+
+ "You can help users with:\n"
36+
+ "- Writing and generating code snippets\n"
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+ "- Reviewing code and suggesting improvements\n"
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+ "- Explaining code functionality\n"
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+ "- Debugging and fixing errors\n"
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+ "- Providing best practices and security guidance\n\n"
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+ "When providing code, ensure it is syntactically correct, well-commented, and follows best practices. "
42+
+ "Always explain your reasoning when suggesting changes or solutions.")
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.tools(
44+
FunctionTool.create(CodeAssistant.class, "generateCode"),
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FunctionTool.create(CodeAssistant.class, "reviewCode"),
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FunctionTool.create(CodeAssistant.class, "explainCode"),
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FunctionTool.create(CodeAssistant.class, "debugCode"))
48+
.build();
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50+
public static Map<String, String> generateCode(
51+
@Schema(
52+
name = "language",
53+
description =
54+
"The programming language for the code (e.g., Java, Python, JavaScript)")
55+
String language,
56+
@Schema(name = "task", description = "Description of what the code should do") String task) {
57+
return Map.of(
58+
"status",
59+
"success",
60+
"language",
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language,
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"task",
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task,
64+
"message",
65+
"Code generation request received for " + language + " to: " + task);
66+
}
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68+
public static Map<String, String> reviewCode(
69+
@Schema(name = "code", description = "The code to review") String code,
70+
@Schema(name = "language", description = "The programming language of the code (optional)")
71+
String language) {
72+
return Map.of(
73+
"status",
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"success",
75+
"language",
76+
language != null ? language : "detected",
77+
"message",
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"Code review request received. Analyzing code quality, best practices, and potential improvements.");
79+
}
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public static Map<String, String> explainCode(
82+
@Schema(name = "code", description = "The code to explain") String code,
83+
@Schema(
84+
name = "detail_level",
85+
description = "Level of detail for explanation (brief, detailed, comprehensive)")
86+
String detailLevel) {
87+
return Map.of(
88+
"status",
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"success",
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"detail_level",
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detailLevel != null ? detailLevel : "detailed",
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"message",
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"Code explanation request received. Will provide "
94+
+ (detailLevel != null ? detailLevel : "detailed")
95+
+ " explanation of the code.");
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}
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public static Map<String, String> debugCode(
99+
@Schema(name = "code", description = "The code with the bug") String code,
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@Schema(name = "error_message", description = "The error message or description of the issue")
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String errorMessage) {
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return Map.of(
103+
"status",
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"success",
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"error_message",
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errorMessage,
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"message",
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"Debugging request received. Analyzing code to identify and fix the issue: "
109+
+ errorMessage);
110+
}
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public static void main(String[] args) {
113+
AdkWebServer.start(ROOT_AGENT);
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}
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}

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