phucnh

package Boot

import akka.actor.{Cancellable, Actor, ActorSystem, Props}
import akka.stream.{OverflowStrategy, ActorFlowMaterializer}
import akka.stream.actor.ActorSubscriberMessage.{OnComplete, OnNext}
import akka.stream.actor.{ActorSubscriber, OneByOneRequestStrategy, RequestStrategy}
import akka.stream.scaladsl._
import org.akkamon.core.exporters.StatsdExporter
import org.akkamon.core.instruments.{CounterTrait, LoggingTrait, TimingTrait}

phucnh

This cheat sheet originated from the forum, credits to Laurent Poulain. We copied it and changed or added a few things.

Evaluation Rules

• Call by value: evaluates the function arguments before calling the function
• Call by name: evaluates the function first, and then evaluates the arguments if need be

    def example = 2      // evaluated when called
    val example = 2      // evaluated immediately

phucnh

Title

<Additional information about your API call. Try to use verbs that match both request type (fetching vs modifying) and plurality (one vs multiple).>

• URL

  <The URL Structure (path only, no root url)>

• Method:

phucnh

-e
--langdef=scala
--langmap=scala:.scala
--regex-scala=class\s+(\w+)/\1/c,classes/
--regex-scala=object\s+(\w+)/\1/c,objects/
--regex-scala=trait\s+(\w+)/\1/t,traits/
--regex-scala=type\s+(\w+)/\1/T,types/
--regex-scala=def\s+(\w+)/\1/m,methods/
--regex-scala=val\s+(\w+)/\1/l,constants/
--regex-scala=var\s+(\w+)/\1/l,variables/

phucnh

// get handle to build output
def config = new HashMap()
def bindings = getBinding()
config.putAll(bindings.getVariables())
def out = config['out']

for (aSlave in hudson.model.Hudson.instance.slaves) {
  // check if executor is dead
  execList = aSlave.getComputer().getExecutors()      
  for( exec in execList ) {

phucnh

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

phucnh

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

phucnh

akka-persistenceのプラグインをつくろう

• 僕はおくみん
• @okumin

参考

• Persistence — Akka Documentation

Akka persistence is 何

phucnh

public class Constants {

    /**
     * Contains the path to your Lambda function code.
     */
    public static final String LAMBDA_TASK_ROOT = System.getenv("LAMBDA_TASK_ROOT");

    /**
     * The environment variable is set to one of the following options, depending on the runtime of the Lambda function:
     * AWS_Lambda_nodejs, AWS_Lambda_nodejs4.3, AWS_Lambda_nodejs6.10

phucnh

#!/usr/bin/env bash

# lists all unused AWS security groups.
# a group is considered unused if it's not attached to any network interface.
# requires aws-cli and jq.

# all groups
aws ec2 describe-security-groups \
  | jq --raw-output '.SecurityGroups[] | [.GroupName, .GroupId] | @tsv' \
  | sort > /tmp/sg.all