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Stale Issue Auditor agent implementation #845

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56 changes: 56 additions & 0 deletions .github/workflows/stale-bot.yml
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name: ADK Stale Issue Auditor (Java)

on:
workflow_dispatch:
schedule:
# This runs at 6:00 AM UTC (10 PM PST)
- cron: '0 6 * * *'

jobs:
audit-stale-issues:

if: github.repository == 'google/adk-java'

runs-on: ubuntu-latest
timeout-minutes: 60

permissions:
issues: write
contents: read

steps:
- name: Checkout repository
uses: actions/checkout@v4

- name: Set up JDK 17
uses: actions/setup-java@v4
with:
java-version: '17'
distribution: 'temurin'
cache: maven

- name: Build with Maven
run: mvn clean compile

- name: Run Auditor Agent
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
STALE_HOURS_THRESHOLD: ${{ secrets.STALE_HOURS_THRESHOLD }}
CLOSE_HOURS_AFTER_STALE_THRESHOLD: ${{ secrets.CLOSE_HOURS_AFTER_STALE_THRESHOLD }}

GRAPHQL_COMMENT_LIMIT: ${{ secrets.GRAPHQL_COMMENT_LIMIT }}
GRAPHQL_EDIT_LIMIT: ${{ secrets.GRAPHQL_EDIT_LIMIT }}
GRAPHQL_TIMELINE_LIMIT: ${{ secrets.GRAPHQL_TIMELINE_LIMIT }}

SLEEP_BETWEEN_CHUNKS: ${{ secrets.SLEEP_BETWEEN_CHUNKS }}

OWNER: ${{ github.repository_owner }}
REPO: adk-java
CONCURRENCY_LIMIT: 3
LLM_MODEL_NAME: "gemini-2.5-flash"

JAVA_TOOL_OPTIONS: "-Djava.util.logging.SimpleFormatter.format='%1$tF %1$tT %4$s %2$s %5$s%6$s%n'"

run: mvn compile exec:java@run-stale-bot -pl :stale-agent
8 changes: 2 additions & 6 deletions contrib/samples/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">
<?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>com.google.adk</groupId>
<artifactId>google-adk-parent</artifactId>
<version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
<relativePath>../..</relativePath>
</parent>

<artifactId>google-adk-samples</artifactId>
<packaging>pom</packaging>

<name>Google ADK Samples</name>
<description>Aggregator for sample applications.</description>

<modules>
<module>a2a_basic</module>
<module>a2a_server</module>
<module>configagent</module>
<module>helloworld</module>
<module>mcpfilesystem</module>
<module>stale-agent</module>
</modules>
</project>
83 changes: 83 additions & 0 deletions contrib/samples/stale-agent/pom.xml
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<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.google.adk</groupId>
<artifactId>google-adk-samples</artifactId>
<version>0.8.0</version>
</parent>
<groupId>com.google.adk.samples</groupId>
<artifactId>stale-agent</artifactId>
<name>stale-agent</name>
<url>http://maven.apache.org</url>
<properties>
<java.version>17</java.version>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<adk.version>${project.version}</adk.version> <!--${project.version}</adk.version> -->
<slf4j.version>2.0.9</slf4j.version>
</properties>
<dependencies>
<dependency>
<groupId>com.google.adk</groupId>
<artifactId>google-adk</artifactId>
<version>${adk.version}</version>
</dependency>

<dependency>
<groupId>org.kohsuke</groupId>
<artifactId>github-api</artifactId>
<version>1.318</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents.client5</groupId>
<artifactId>httpclient5</artifactId>
<version>5.2.1</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>${slf4j.version}</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.16.1</version>
</dependency>

</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.1.0</version>
<executions>
<execution>
<id>run-stale-bot</id>
<goals>
<goal>java</goal>
</goals>
<configuration>
<mainClass>com.google.adk.samples.stale.StaleBotApp</mainClass>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
202 changes: 202 additions & 0 deletions contrib/samples/stale-agent/src/main/java/com/google/adk/samples/stale/StaleBotApp.java
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package com.google.adk.samples.stale;

import com.google.adk.runner.InMemoryRunner;
import com.google.adk.samples.stale.agent.StaleAgent;
import com.google.adk.samples.stale.config.StaleBotSettings;
import com.google.adk.samples.stale.utils.GitHubUtils;
import com.google.genai.types.Content;
import com.google.genai.types.Part;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Collectors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class StaleBotApp {

private static final Logger logger = LoggerFactory.getLogger(StaleAgent.class);
private static final String USER_ID = "stale_bot_user";

record IssueResult(long issueNumber, double durationSeconds, int apiCalls) {}

public static void main(String[] args) {

try {
runBot();
} catch (Exception e) {
logger.error(String.format("Unexpected fatal error", e));
}
}

public static void runBot() {
logger.info(
String.format(
" Starting Stale Bot for " + StaleBotSettings.OWNER + "/" + StaleBotSettings.REPO));
logger.info(String.format("Concurrency level set to " + StaleBotSettings.CONCURRENCY_LIMIT));

GitHubUtils.resetApiCallCount();

double filterDays = StaleBotSettings.STALE_HOURS_THRESHOLD / 24.0;
logger.info(String.format("Fetching issues older than %.2f days...", filterDays));

List<Integer> allIssues;
try {
allIssues =
GitHubUtils.getOldOpenIssueNumbers(
StaleBotSettings.OWNER, StaleBotSettings.REPO, filterDays);
} catch (Exception e) {
logger.error(String.format("Failed to fetch issue list", e));
return;
}

int totalCount = allIssues.size();
int searchApiCalls = GitHubUtils.getApiCallCount();

if (totalCount == 0) {
logger.info(String.format("No issues matched the criteria. Run finished."));
return;
}

logger.info(
String.format(
"Found %d issues to process. (Initial search used %d API calls).",
totalCount, searchApiCalls));

double totalProcessingTime = 0.0;
int totalIssueApiCalls = 0;
int processedCount = 0;

InMemoryRunner runner = new InMemoryRunner(StaleAgent.create());

for (int i = 0; i < totalCount; i += StaleBotSettings.CONCURRENCY_LIMIT) {
int end = Math.min(i + StaleBotSettings.CONCURRENCY_LIMIT, totalCount);
List<Integer> chunk = allIssues.subList(i, end);
int currentChunkNum = (i / StaleBotSettings.CONCURRENCY_LIMIT) + 1;

logger.info(
String.format("Starting chunk %d: Processing issues %s ", currentChunkNum, chunk));

// Create a list of Futures (Async Tasks)
List<CompletableFuture<IssueResult>> futures =
chunk.stream()
.map(issueNum -> processSingleIssue(issueNum, runner))
.collect(Collectors.toList());

// Wait for all tasks in this chunk to complete
CompletableFuture<Void> allFutures =
CompletableFuture.allOf(futures.toArray(new CompletableFuture[0]));

try {
allFutures.join();

// Aggregate results
for (CompletableFuture<IssueResult> f : futures) {
IssueResult result = f.get();
if (result != null) {
totalProcessingTime += result.durationSeconds();
totalIssueApiCalls += result.apiCalls();
}
}
} catch (Exception e) {
logger.error(String.format("Error gathering chunk results", e));
}

processedCount += chunk.size();
logger.info(
String.format(
"Finished chunk %d. Progress: %d/%d ", currentChunkNum, processedCount, totalCount));

// Sleep between chunks if not finished
if (end < totalCount) {
logger.info(
String.format(
"Sleeping for "
+ StaleBotSettings.SLEEP_BETWEEN_CHUNKS
+ "s to respect rate limits..."));
try {
Thread.sleep((long) (StaleBotSettings.SLEEP_BETWEEN_CHUNKS * 1000));
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
logger.warn(String.format("Sleep interrupted."));
}
}
}

int totalApiCallsForRun = searchApiCalls + totalIssueApiCalls;
double avgTimePerIssue = totalCount > 0 ? totalProcessingTime / totalCount : 0;

logger.info(String.format("Successfully processed " + processedCount + " issues."));
logger.info(String.format("Total API calls made this run: " + totalApiCallsForRun));
logger.info(String.format("Average processing time per issue: %.2f seconds.", avgTimePerIssue));
}

private static CompletableFuture<IssueResult> processSingleIssue(
int issueNumber, InMemoryRunner localRunner) {
return CompletableFuture.supplyAsync(
() -> {
long startNano = System.nanoTime();
int startApiCalls = GitHubUtils.getApiCallCount();

logger.info(String.format("Processing Issue #" + issueNumber + "..."));

String sessionId = "session-" + issueNumber + "-" + UUID.randomUUID().toString();

try {

localRunner
.sessionService()
.createSession(localRunner.appName(), USER_ID, null, sessionId)
.blockingGet();

logger.info(String.format("Session created successfully: " + sessionId));

String promptText = "Audit Issue #" + issueNumber + ".";
Content promptMessage = Content.fromParts(Part.fromText(promptText));
StringBuilder fullResponse = new StringBuilder();

localRunner
.runAsync(USER_ID, sessionId, promptMessage)
.blockingSubscribe(
event -> {
try {
if (event.content() != null && event.content().isPresent()) {
event
.content()
.get()
.parts()
.get()
.forEach(
p -> {
p.text().ifPresent(text -> fullResponse.append(text));
});
}
} catch (Exception e) {
logger.warn(String.format("Failed to process Issue #" + issueNumber, e));
}
},
error -> {
logger.error(
String.format(
"Stream failed for Issue #"
+ issueNumber
+ ": "
+ error.getMessage()));
});

String decision = fullResponse.toString().replace("\n", " ");
if (decision.length() > 150) decision = decision.substring(0, 150);

logger.info("#" + issueNumber + " Decision: " + decision + "...");

} catch (Exception e) {
logger.error(String.format("Error processing issue #" + issueNumber, e));
}

double durationSeconds = (System.nanoTime() - startNano) / 1_000_000_000.0;
int issueApiCalls = Math.max(0, GitHubUtils.getApiCallCount() - startApiCalls);

return new IssueResult(issueNumber, durationSeconds, issueApiCalls);
});
}
}
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