rbento / java-reactor-starter

A starter project to exercise Reactive Programming with Java.

java-reactor-starter

A starter project to practice Reactive Programming with Java and Project Reactor.

Requirements

---

• JDK 21 from Azul
• Gradle 8.4

Build

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./gradlew clean build

Run

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./gradlew run

Running with BlockHound

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BlockHound is a Java agent that detects blocking calls from non-blocking threads.

At the entry point

    public static void main(String[] args) {
        BlockHound.install();
        // ...
    }

Set the VM options for BlockHound

    -XX:+AllowRedefinitionToAddDeleteMethods
    -XX:+EnableDynamicAgentLoading

Result when a blocking call is present:

    reactor.blockhound.BlockingOperationError: Blocking call! java.lang.Thread.sleep
	    at java.base/java.lang.Thread.sleep(Native Method)
	    at com.example.Example.lambda$exampleTest$0(Example.java:16)