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feat: attach Java dedup agent in sample
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‎.github/workflows/java-dedup.yml‎

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name: Java Dedup Sample
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on:
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pull_request:
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branches: [main]
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push:
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branches: [main]
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jobs:
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build:
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name: JDK ${{ matrix.java-version }}
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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java-version: ["8", "17", "21"]
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steps:
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- name: Checkout
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uses: actions/checkout@v4
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- name: Set up JDK ${{ matrix.java-version }}
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uses: actions/setup-java@v4
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with:
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distribution: temurin
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java-version: ${{ matrix.java-version }}
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cache: maven
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- name: Build java-dedup without Keploy compile dependency
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working-directory: java-dedup
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run: mvn -B -DskipTests clean package
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- name: Verify Keploy is not a compile-time dependency
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working-directory: java-dedup
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run: |
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set -euo pipefail
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mvn -B dependency:tree -Dincludes=io.keploy:keploy-sdk -DoutputFile=target/keploy-dependency-tree.txt
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if grep -q "io.keploy:keploy-sdk" target/keploy-dependency-tree.txt; then
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cat target/keploy-dependency-tree.txt
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exit 1
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fi
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if grep -R "io.keploy\\.dedup\\|io.keploy\\.servlet\\|KeployDedupAgent\\|KeployMiddleware" src/main/java; then
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exit 1
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fi

‎java-dedup/Dockerfile‎

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@@ -7,7 +7,8 @@ RUN groupadd --gid 10001 appuser \
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&& useradd --uid 10001 --gid 10001 --home-dir /home/appuser --create-home --shell /usr/sbin/nologin appuser
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COPY --chown=10001:10001 target/java-dedup-0.0.1-SNAPSHOT.jar /app/app.jar
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COPY --chown=10001:10001 target/keploy-sdk.jar /app/keploy-sdk.jar
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COPY --chown=10001:10001 target/jacocoagent.jar /app/jacocoagent.jar
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EXPOSE 8080
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USER 10001:10001
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ENTRYPOINT ["java", "-javaagent:/app/jacocoagent.jar=destfile=/tmp/jacoco.exec", "-jar", "/app/app.jar"]
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ENTRYPOINT ["java", "-javaagent:/app/keploy-sdk.jar", "-javaagent:/app/jacocoagent.jar=destfile=/tmp/jacoco.exec", "-jar", "/app/app.jar"]

‎java-dedup/Dockerfile.classpath‎

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COPY --chown=10001:10001 target/classes /app/classes
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COPY --chown=10001:10001 target/dependency /app/libs
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COPY --chown=10001:10001 target/keploy-sdk.jar /app/keploy-sdk.jar
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COPY --chown=10001:10001 target/jacocoagent.jar /app/jacocoagent.jar
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ENV KEPLOY_JAVA_CLASS_DIRS=/app/classes
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EXPOSE 8080
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USER 10001:10001
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ENTRYPOINT ["java", "-javaagent:/app/jacocoagent.jar=destfile=/tmp/jacoco.exec", "-cp", "/app/classes:/app/libs/*", "io.keploy.samples.javadedup.JavaDedupApplication"]
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ENTRYPOINT ["java", "-javaagent:/app/keploy-sdk.jar", "-javaagent:/app/jacocoagent.jar=destfile=/tmp/jacoco.exec", "-cp", "/app/classes:/app/libs/*", "io.keploy.samples.javadedup.JavaDedupApplication"]

‎java-dedup/Dockerfile.distroless‎

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@@ -3,8 +3,9 @@ FROM gcr.io/distroless/java17-debian12:nonroot
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WORKDIR /app
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COPY --chown=10001:10001 target/java-dedup-0.0.1-SNAPSHOT.jar /app/app.jar
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COPY --chown=10001:10001 target/keploy-sdk.jar /app/keploy-sdk.jar
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COPY --chown=10001:10001 target/jacocoagent.jar /app/jacocoagent.jar
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EXPOSE 8080
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USER 10001:10001
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ENTRYPOINT ["java", "-javaagent:/app/jacocoagent.jar=destfile=/tmp/jacoco.exec", "-jar", "/app/app.jar"]
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ENTRYPOINT ["java", "-javaagent:/app/keploy-sdk.jar", "-javaagent:/app/jacocoagent.jar=destfile=/tmp/jacoco.exec", "-jar", "/app/app.jar"]

‎java-dedup/README.md‎

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CI does not record this sample. The `keploy/` directory is checked in so the pipeline only builds the app and runs replay with `--dedup`.
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The Java SDK reads JaCoCo coverage in-process via `org.jacoco.agent.rt.RT.getAgent().getExecutionData(...)`, so attaching the JaCoCo Java agent is enough — no TCP server, no port choice, no `--pass-through-ports`.
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The Keploy Java SDK is attached as a Java agent at replay time. The sample does not compile against `io.keploy:keploy-sdk` and does not import Keploy classes in application code.
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The SDK reads JaCoCo coverage in-process via `org.jacoco.agent.rt.RT.getAgent().getExecutionData(...)`, so attach both agents when running dynamic deduplication: the Keploy agent for the control/data socket protocol, and the JaCoCo agent for runtime coverage.
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## Setup
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```bash
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mvn -B -DskipTests clean package
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mvn -B -DskipTests -Dkeploy.agent.version=2.0.1 clean package
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```
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This builds the sample against the released Keploy Java SDK, produces `target/java-dedup-0.0.1-SNAPSHOT.jar`, and copies `target/jacocoagent.jar` next to it.
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This produces `target/java-dedup-0.0.1-SNAPSHOT.jar`, copies `target/keploy-sdk.jar`, and copies `target/jacocoagent.jar` next to it. Use the released Keploy Java SDK version that includes Java-agent support.
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## Run dedup natively
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```bash
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keploy test \
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-c "java -javaagent:target/jacocoagent.jar -jar target/java-dedup-0.0.1-SNAPSHOT.jar" \
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-c "java -javaagent:target/keploy-sdk.jar -javaagent:target/jacocoagent.jar -jar target/java-dedup-0.0.1-SNAPSHOT.jar" \
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--dedup --language java --delay 1 \
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--health-url "http://127.0.0.1:8080/healthz" \
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--health-poll-timeout 30s \

‎java-dedup/pom.xml‎

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<properties>
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<java.version>1.8</java.version>
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<keploy.sdk.version>2.0.0</keploy.sdk.version>
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<jacoco.version>0.8.12</jacoco.version>
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</properties>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>io.keploy</groupId>
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<artifactId>keploy-sdk</artifactId>
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<version>${keploy.sdk.version}</version>
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</dependency>
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</dependencies>
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<build>
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</plugin>
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</plugins>
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</build>
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<profiles>
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<profile>
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<id>copy-keploy-agent</id>
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<activation>
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<property>
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<name>keploy.agent.version</name>
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</property>
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</activation>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-dependency-plugin</artifactId>
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<version>3.6.1</version>
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<executions>
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<execution>
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<id>copy-keploy-java-agent</id>
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<phase>package</phase>
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<goals>
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<goal>copy</goal>
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</goals>
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<configuration>
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<artifactItems>
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<artifactItem>
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<groupId>io.keploy</groupId>
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<artifactId>keploy-sdk</artifactId>
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<version>${keploy.agent.version}</version>
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<outputDirectory>${project.build.directory}</outputDirectory>
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<destFileName>keploy-sdk.jar</destFileName>
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</artifactItem>
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</artifactItems>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</profile>
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</profiles>
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</project>

‎java-dedup/src/main/java/io/keploy/samples/javadedup/JavaDedupApplication.java‎

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package io.keploy.samples.javadedup;
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import io.keploy.servlet.KeployMiddleware;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.Import;
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@SpringBootApplication
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@Import(KeployMiddleware.class)
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public class JavaDedupApplication {
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public static void main(String[] args) {

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