Guided Tour of Vert.x

This app demonstrates part of the Vert.x framework. It listens for incoming connections on port 8080 and echos the request body in all caps. Run the app, and execute curl localhost:8080 -d "no touching" to see it in action.

Prerequisites

For development, you need Java 17.

Running tests

Execute ./mvnw test to run the tests.

Running the app

Execute ./mvnw package -Dmaven.test.skip to build a JAR. Run the app by executing java -jar target/<NAME_OF_JAR>.jar.

Creating a native image

Use the tracing agent to find out which code is reachable and capture this information in the form of configuration files by first executing the following command:

java -agentlib:native-image-agent=config-output-dir=graalvm-config -jar target/<NAME_OF_JAR>.jar

While the app is running, perform some requests to allow the tracing agent to do its work:

curl localhost:8080/non -d "no touching"

Execute the following command to create a native image:

native-image -jar target/<NAME_OF_JAR>.jar --no-fallback \
--initialize-at-run-time=io.netty.handler.codec.compression.ZstdOptions \
--initialize-at-build-time=org.slf4j \
--initialize-at-build-time=ch.qos.logback \
-H:ReflectionConfigurationFiles=graalvm-config/reflect-config.json