Ping Pong (Maven)

Overview

This Maven version of the ping/pong demo generates a simple payload schema and runs server and client processes via exec:java. It highlights the same registered buffer and transport flow as the Gradle example.

Clone and run

1. Install Java 25 and Git, then confirm the toolchain.

   java --version

2. Clone the examples repository.

   git clone https://github.com/mvp-express/examples.git

3. Move into the Maven ping pong example folder.

   cd examples/myra-codec-transport-ping-pong-maven

4. Generate sources and the lock file.

   ./mvnw -q \
     -Dexec.mainClass=express.mvp.myra.codec.codegen.MyraCodegenCli \
     -Dexec.args="--schema src/main/resources/schemas/ping_pong.myra.yml --output src/main/java --lockfile src/main/resources/locks/ping_pong.myra.lock" \
     exec:java

5. Start the server in one terminal.

   ./mvnw -q -DskipTests \
     -Dexec.mainClass=express.mvp.myra.examples.pingpong.PingPongServer \
     -Dexec.jvmArgs="--enable-preview --enable-native-access=ALL-UNNAMED" \
     compile exec:java

6. Start the client in another terminal.

   ./mvnw -q -DskipTests \
     -Dexec.mainClass=express.mvp.myra.examples.pingpong.PingPongClient \
     -Dexec.jvmArgs="--enable-preview --enable-native-access=ALL-UNNAMED" \
     compile exec:java

If you are on Windows, use mvnw.cmd and keep each command on a single line.

Concepts highlighted

• Codec generated Payload schema for ping and pong.
• Maven exec workflow with explicit preview and native access flags.
• Transport client and server running in separate terminals.
• Registered buffer pools and NIO backend configuration.
• Zero copy payload decode with flyweights.

Files to explore

• src/main/resources/schemas/ping_pong.myra.yml
• src/main/java/express/mvp/myra/examples/pingpong/PingPongServer.java
• src/main/java/express/mvp/myra/examples/pingpong/PingPongClient.java