mihaisoloi

Software development methods

• https://en.wikipedia.org/wiki/List_of_software_development_philosophies
• https://en.wikipedia.org/wiki/Adaptive_software_development
• https://en.wikipedia.org/wiki/Agile_software_development

Architecture

• https://fideloper.com/hexagonal-architecture
• https://martinfowler.com/bliki/CQRS.html

mihaisoloi

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

mihaisoloi

Profiling Memory Usage of a Method (JVM)

Prerequisites:

• YourKit

Steps:

1. Add Thread.sleep(60000) to the START and END of the method you want to profile.

mihaisoloi

package commons

import scala.concurrent.ExecutionContext
import akka.actor.ActorSystem

case class Contexts(val actorSystem: ActorSystem) {
  import Contexts._

  implicit val defaultCtx = DefaultExeCtx(play.api.libs.concurrent.Execution.defaultContext)
  implicit val ctrlsCtx = CtrlExeCtx(defaultCtx.underlying)