Vlad Lysyy mrbald

Fluent-bit rocks

A short survey of log collection options and why you picked the wrong one. 😜

Who am I? Where am I from?

I'm Steve Coffman and I work at Ithaka. We do JStor (academic journals) and other stuff. How big is it?

Number	what it means
101,332,633	unique visitors in 2017

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

This is a quick reference to get to Jolokia statistics urls for JBoss Fuse or JBoss A-MQ statistics. Sometimes, when you are interested in very specific attributes, it's easier to keep monitoring a specific url rather than loading the full Hawtio console.

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Profiling an application in Mac OS X

Finding which process to profile

If your system is running slowly, perhaps a process is using too much CPU time and won't let other processes run smoothly. To find out which processes are taking up a lot of CPU time, you can use Apple's Activity Monitor.

The CPU pane shows how processes are affecting CPU (processor) activity:

	# Install graphite dependencies
	apt-get install -y python3 python3-pip python3-cairo python3-django
	apt-get install -y apache2 libapache2-mod-wsgi-py3

	# Install graphite
	pip3 install https://github.com/graphite-project/whisper/tarball/master
	pip3 install https://github.com/graphite-project/carbon/tarball/master
	pip3 install https://github.com/graphite-project/graphite-web/tarball/master

	# Setup a vhost by grabbing the example the graphite team released on their repo.

	// http://stackoverflow.com/questions/9160001/how-to-profile-methods-in-scala
	def time[R](block: => R): R = {
	val t0 = System.nanoTime()
	val result = block // call-by-name
	val t1 = System.nanoTime()
	println("Elapsed time: " + (t1 - t0) + "ns")
	result
	}

	package akkahttptest

	import akka.actor.ActorSystem
	import akka.http.Http
	import akka.stream.FlowMaterializer
	import akka.http.server._
	import akka.http.marshalling.PredefinedToResponseMarshallers._
	import akka.stream.scaladsl.{HeadSink, Source}

	object Proxy extends App {

	// Coproduct is extension of Either concept, to N multually exlusive choices

	type ISB = Int :+: String :+: Boolean :+: CNil

	val isb = Coproduct[ISB]("foo") //> isb : qaaz.ISB = foo

	isb.select[Int] //> res0: Option[Int] = None

	isb.select[String] //> res1: Option[String] = Some(foo)

	<?xml version="1.0" encoding="UTF-8"?>

	<persistence xmlns="http://java.sun.com/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
	http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
	version="1.0">


	<!-- derby -->

	"""
	An XPUB/XSUB broker that forwards subscriptions

	"""
	import os
	import string
	import sys
	import time
	from random import randint
	from threading import Thread