Thread pools on the JVM should usually be divided into the following three categories:
- CPU-bound
- Blocking IO
- Non-blocking IO polling
Each of these categories has a different optimal configuration and usage pattern.
package protoser | |
import java.util.concurrent.atomic.AtomicReference | |
import akka.actor.ExtendedActorSystem | |
import akka.serialization.BaseSerializer | |
import com.trueaccord.scalapb.GeneratedMessageCompanion | |
class ScalaPbSerializer(val system: ExtendedActorSystem) extends BaseSerializer { | |
private val classToCompanionMapRef = new AtomicReference[Map[Class[_], GeneratedMessageCompanion[_]]](Map.empty) |
import scala.slick.lifted.CanBeQueryCondition | |
// optionally filter on a column with a supplied predicate | |
case class MaybeFilter[X, Y](val query: scala.slick.lifted.Query[X, Y]) { | |
def filter[T,R:CanBeQueryCondition](data: Option[T])(f: T => X => R) = { | |
data.map(v => MaybeFilter(query.filter(f(v)))).getOrElse(this) | |
} | |
} | |
// example use case | |
import java.sql.Date |
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A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.
val square : Int => Int = x => x * x
Example on how to run locally an AWS Lambda via API Gateway using localstack.
Based on...
This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.
Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).
package akkahttptest | |
import akka.http.Http | |
import akka.stream.ActorFlowMaterializer | |
import akka.actor.ActorSystem | |
import akka.stream.scaladsl.{Sink, Source} | |
import akka.http.model._ | |
object TestClient extends App { |
to check if the server works - https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice | |
stun: | |
stun.l.google.com:19302, | |
stun1.l.google.com:19302, | |
stun2.l.google.com:19302, | |
stun3.l.google.com:19302, | |
stun4.l.google.com:19302, | |
stun.ekiga.net, | |
stun.ideasip.com, |