Groovy script for testing Vertx BlockedThreadChecker

BlockedThreadCheckerTest.groovy

/**
Groovy script for testing Vertx BlockedThreadChecker.

To run:
1. Install Groovy using sdkman (http://sdkman.io)
2. Excecute script using groovy command:
   groovy -Dgroovy.grape.report.downloads=true  BlockedThreadCheckerTest.groovy
*/

@Grab('io.vertx:vertx-core:3.4.2')

import io.vertx.core.*

def options = new VertxOptions()

// The ff line will cause the BlockedThreadChecker warning log to show immediately after 
// executing the blocking code,  with time limit shown as 0 (which is incorrect).
// The BlockedThreadChecker works fine with the default 60s time limit value after removing the ff line.
options.setMaxWorkerExecuteTime(10_000) // time unit is in nanoseconds in vertx 3.4 (previously in milliseconds in 3.3)

def vertx = Vertx.vertx(options)

vertx.deployVerticle(new AbstractVerticle() {

    def executor = vertx.createSharedWorkerExecutor('shared-exec', 10)		

    @Override
    void start() throws Exception {
        executor.executeBlocking({ future ->
            def ctr = 0
            while (true) {
                println "${++ctr} sec"
                Thread.sleep(1_000)
            }            
            future.complete()
        }, {
            // Do nothing.	
        })
    }
})