danveloper

package com.danveloper.providers

import com.danveloper.support.ApplicationHolder as AH
import org.hibernate.SessionFactory as SF

public interface Provider<T> {
  T get()
}

class Support {

danveloper

List.metaClass.collapse = {->
    def start,end
    def reverse = delegate[0]?.getAt(0)-delegate[0]?.getAt(-1) > 0
    def expanded = delegate.flatten().unique().sort()

    def result = (reverse ? expanded.reverse() : expanded).inject([]) { l, n ->
        start = start == null ? n : start
        end = end == null ? n : end
        if ((reverse?n+1:n-1)==end) {
          end = n

danveloper

public class Promises {
    private static class PageMetrics {
        Integer visits;
        Long avgMsOnPage;


        @Override
        public String toString() {
            return String.format("{ avgMsOnPage=%d, visits=%d }", avgMsOnPage, visits);
        }

danveloper

public class TrampolineLambda {
    interface TrampolineFunction<T, R> {
        R apply(T...obj);

        public default Object trampoline(T...objs) {
            Object result = apply(objs);
            if (!(result instanceof TrampolineFunction)) {
                return result;
            } else {
                return this;

danveloper

• Create a new folder
• Create a build.gradle file
• Inside the build.gradle file, put the following:

buildscript {
  repositories {
    jcenter()
  }
 dependencies {

danveloper

Ratpack "Hello World" on a t2.micro, Ubuntu 14.04, no extra server configuration.

~30,000 req/s

# ./wrk -t4 -c72 -d60s -R35000 http://localhost:5050
Running 1m test @ http://localhost:5050
  4 threads and 72 connections
  Thread calibration: mean lat.: 823.764ms, rate sampling interval: 3041ms
 Thread calibration: mean lat.: 800.518ms, rate sampling interval: 2902ms

danveloper

Keybase proof

I hereby claim:

• I am danveloper on github.
• I am danveloper (https://keybase.io/danveloper) on keybase.
• I have a public key whose fingerprint is FE5B 4B85 F69A 746A 4485 0EB6 8878 7076 EB89 3653

To claim this, I am signing this object:

danveloper

package app

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.databind.node.ObjectNode
import com.google.common.io.ByteSource
import com.google.common.io.Resources
import ratpack.config.ConfigSource
import ratpack.file.FileSystemBinding

import java.nio.file.Files

danveloper

import groovy.transform.Memoized

class FibBackoff {

  int tryNum

  void backoff() {
    tryNum = fib(tryNum)
    sleep(tryNum * 1000)
  }

danveloper

starting the app

* app starts with `-Dratpack.epoll=true` to enable the Netty `EpollEventLoop`

# ./wrk -t72 -c3000 -d30s http://localhost:5050
Running 30s test @ http://localhost:5050
  72 threads and 3000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     4.82ms    9.03ms 229.22ms   95.25%
    Req/Sec     9.58k     3.52k   34.54k    70.33%