package com.test;

import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import com.slack.api.model.Message;
import javax.enterprise.context.ApplicationScoped;

@ApplicationScoped
public class MyRouteBuilder extends RouteBuilder {

    @Override
    public void configure() throws Exception {
        from("timer:x?repeatCount=1").setBody().constant("Hello from quarkus").to("slack:#<channel>?webhookUrl=https://<webhook>");
    }
}

./timer-to-slack-1.0.0-SNAPSHOT-runner
__  ____  __  _____   ___  __ ____  ______ 
 --/ __ \/ / / / _ | / _ \/ //_/ / / / __/ 
 -/ /_/ / /_/ / __ |/ , _/ ,< / /_/ /\ \   
--\___\_\____/_/ |_/_/|_/_/|_|\____/___/   
2021-05-31 13:18:24,270 INFO  [org.apa.cam.qua.cor.CamelBootstrapRecorder] (main) bootstrap runtime: org.apache.camel.quarkus.main.CamelMainRuntime
2021-05-31 13:18:24,271 INFO  [org.apa.cam.imp.eng.AbstractCamelContext] (main) Routes startup summary (total:1 started:1)
2021-05-31 13:18:24,271 INFO  [org.apa.cam.imp.eng.AbstractCamelContext] (main)     Started route1 (timer://x)
2021-05-31 13:18:24,271 INFO  [org.apa.cam.imp.eng.AbstractCamelContext] (main) Apache Camel 3.9.0 (camel-1) started in 0ms (build:0ms init:0ms start:0ms)
2021-05-31 13:18:24,271 INFO  [io.quarkus] (main) timer-to-slack 1.0.0-SNAPSHOT native (powered by Quarkus 1.13.0.Final) started in 0.004s. 
2021-05-31 13:18:24,271 INFO  [io.quarkus] (main) Profile prod activated. 
2021-05-31 13:18:24,272 INFO  [io.quarkus] (main) Installed features: [camel-core, camel-slack, camel-support-common, camel-timer, cdi]
2021-05-31 13:18:25,542 WARN  [org.apa.cam.com.tim.TimerConsumer] (Camel (camel-1) thread #0 - timer://x) Error processing exchange. Exchange[]. Caused by: [org.apache.camel.CamelExchangeException - Error POSTing to Slack API: WebhookResponse(code=400, message=, body=invalid_payload). Exchange[]]: org.apache.camel.CamelExchangeException: Error POSTing to Slack API: WebhookResponse(code=400, message=, body=invalid_payload). Exchange[]
	at org.apache.camel.component.slack.SlackProducer.sendMessageByWebhookURL(SlackProducer.java:144)
	at org.apache.camel.component.slack.SlackProducer.process(SlackProducer.java:68)
	at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:172)
	at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$SimpleTask.run(RedeliveryErrorHandler.java:439)
	at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:181)
	at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:62)
	at org.apache.camel.processor.Pipeline.process(Pipeline.java:167)
	at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:388)
	at org.apache.camel.component.timer.TimerConsumer.sendTimerExchange(TimerConsumer.java:209)
	at org.apache.camel.component.timer.TimerConsumer$1.run(TimerConsumer.java:76)
	at java.util.TimerThread.mainLoop(Timer.java:556)
	at java.util.TimerThread.run(Timer.java:506)
	at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:519)
	at com.oracle.svm.core.posix.thread.PosixJavaThreads.pthreadStartRoutine(PosixJavaThreads.java:192)