stevebakh / dontfeedthebeast.md

Created April 4, 2022 09:16 — forked from CumpsD/dontfeedthebeast.md

Don’t Feed the Beast – the Great Recruitment Agency Infestation

“Don’t move to that London” warned my northern grandfather once. “It’s full of spivs”.

The Oxford Dictionary (somewhat chauvinistically) defines a spiv as:

A man, typically a flashy dresser, who makes a living by disreputable dealings

“But I work in IT” I told him. “engineers aren’t like that”.

stevebakh / zio-stream-sink-example.scala

Last active March 1, 2020 21:47

Example usage of zio-streams showing lazy evaluation and transformation.

	import zio.console.{putStrLn, Console}
	import zio.stream.{Stream, ZSink, ZStream}
	import zio.{App, IO, ZIO}

	object Main extends App {

	val stream: ZStream[Console, Nothing, Int] = ZStream.unfoldM(1) { count =>
	for {
	_ <- putStrLn(s"create stream item: $count")
	} yield if (count <= 10) Some(count -> (count + 1)) else None

stevebakh / location-of-jar.scala

Created May 4, 2018 12:34

Find the filepath of the jar containing a particular class

	// without instance:
	classOf[SomeClass].getProtectionDomain.getCodeSource.getLocation.toURI.getPath

	// with instance:
	someClassInstance.getClass.getProtectionDomain.getCodeSource.getLocation.toURI.getPath

stevebakh / module-dependency.sbt

Created May 1, 2018 09:43

Make one sbt module depend on a task in another module (example: one module depends on assembly in another)

	lazy val firstmodule = ...
	.settings(
	assemblyJarName in assembly := "some.fat.jar",
	assemblyOutputPath in assembly := file("secondmodule/lib") / (assemblyJarName in assembly).value)

	lazy val secondmodule = ...
	.settings(
	test in IntegrationTest := (test in IntegrationTest).dependsOn(assembly in firstmodule).value)

stevebakh / docker-ps-clean.sh

Created April 20, 2018 09:21

Formatting of `docker ps` output to strip ports - useful to set as an alias if mapping many ports produces large, wrapped output

docker ps --format "table{{.ID}}\t{{.Names}}\t{{.Image}}\t{{.RunningFor}}\t{{.Status}}"

stevebakh / gcloud-datastore-emulator-in-docker.sh

Created April 19, 2018 14:04

Run Google Cloud Datastore emulator via the official docker image

	docker run \
	--rm \
	-it \
	-p 8099:8099 \
	google/cloud-sdk \
	gcloud beta emulators datastore start --project foobar --host-port 0.0.0.0:8099

stevebakh / context-bound-example.scala

Created March 20, 2018 16:23

Just playing around with context bounds and implicit type classes. Shows the two forms that can be used to access the implicit typeclass.

 trait A {
   val name = "Aaaaay"
 }
 class B extends A
 trait C[T <: A] {
   def gofuckyourself(t: T): String
 }

stevebakh / CircuitBreaker.scala

Created March 7, 2018 09:49

Basic Monix example of a circuit-breaker used on a task.

	import monix.eval.{Task, TaskCircuitBreaker}
	import monix.execution.Scheduler.Implicits.global

	import scala.concurrent.duration.DurationDouble
	import scala.util.{Failure, Success}

	object Main extends App {

	private val task = Task {
	val nr = util.Random.nextInt()

stevebakh / generate-uuid.sh

Created March 6, 2018 09:10

Generate a UUID and convert to lower case

uuidgen | tr '[:upper:]' '[:lower:]'

stevebakh / run-apache-bench.sh

Created March 6, 2018 09:05

Example command to run Apache Bench for a fixed period of time, emulating a browser.

	ab \
	-t 240 \
	-n 100000 \
	-k \
	-c 5 \
	-g ~/Desktop/ab.out \
	-H "Accept: application/json, text/plain, /" \
	-H "Authorization: bearer $TOKEN" \
	-H "Cache-Control: no-cache" \
	-H "Accept-Encoding: gzip, deflate" \

Steven Bakhtiari stevebakh

Don’t Feed the Beast – the Great Recruitment Agency Infestation