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astubbs

astubbs

Kafka Streams is a flexible and powerful framework. The Domain Specific Language (DSL) is an obvious place from which to start, but not all requirements fit the DSL model.

Many people are unaware of the Processor API (PAPI) - or are intimidated by it because of sinks, sources, edges and stores - oh my! But most of the power of the PAPI can be leveraged, simply through the DSL #process method, which lets you attach the general building block Processor interface to your -easy to use- DSL topology, to combine the best of both worlds.

In this talk you’ll get a look at the flexibility of the DSL’s process method and the possibilities it opens up. We’ll use real world use-cases borne from extensive experience in the field with multiple customers to explore power of direct write access to the state stores and how to perform range sub-selects. We’ll also see the options that punctuators bring to the table, as well as opportunities for major latency optimisations.

Key takeaways:

• Understanding of how to combi

astubbs

function sleepin
	echo "Sleeping in $argv minutes..."
	set rest (math "$argv*60")
        sleep $rest
	#echo "Sleeping now..."
	pmset sleepnow
end

astubbs

function curltime
	curl -o /dev/null  -s -w "%{time_connect} + %{time_starttransfer} = %{time_total}\n" $argv
end

astubbs

Timeout timeout = new Timeout(Duration.parse("20 seconds"));
Future<Object> future = Patterns.ask(myActor, new ClientMessage(null), timeout);

Promise<Object> sdf = Akka.asPromise(future);
Promise<Result> r2 = sdf.map(new Function<Object, Result>() {

	@Override
	public Result apply(Object a) throws Throwable {
		val wsrm = (MyMessage)a;
		return ok((wsrm).val); // String value from message object

astubbs

child process exited abnormally
child process exited abnormally
    while executing
"close $fd"
    (procedure "rescan_stage2" line 7)
    invoked from within
"rescan_stage2 file1192de8 ui_ready"