Java Software Development

sudo gedit /etc/vncserver/vncservers.conf VNCSERVERS="1:dev" #VNCSERVERARGS[1]="-geometry 3840x2160 -depth 24" VNCSERVERARGS[1]="-geometry 1680x1050 -depth 24"

Safe Harbor is dead, long live the privacy shield

Kubernetes Health Checks

Password Reset Guidelines

Analytics Cloud Db

Git Branching Strategy

Deep discussion on graceful shutdown Kubernetes Node.js

High Scalability The Secret To 10 Million Concurrent Connections -The Kernel Is The Problem, Not The Solution Scaling to 12 Million Concurrent Connections: How MigratoryData Did It

Web Ontology Language OWL Resource Description Framework SPARQL query language for RDF

JustOne Data Lake - new storage for postgres

Speed up Ubuntu in Vbox

The Author discusses some aspects of SCRUM that he doesn't prefer in this blog post .

The deep-diff lib compares two json structures and indicates the differences.

Optimizing statistics for dates

Mirage

EV Cache

Web declarative sequence diagram tool

Composable webpages

Backlog Vision to Value 7 Product dimensions

64 bit sortable sharded IDs - Instagram style

Visualizations D3js charts Google charts Chartjs Chartist n3-charts Ember charts Smoothie charts Chartkick ZingCharts Highcharts js Fusioncharts Flot amCharts EJS Chart uvCharts Plotly js VictoryPie Charts  (react)

Drill vs Presto SQL query across disparate data, sql, noSql, files, S3, etc.

Alpine really small base image

kubernetes persisten volumes glusterfs filesystem which can provide persistent volumes for kubernetes docker images

vector clocks

Solr nested documents Elasticsearch has better support for nested documents than Solr.

Microservices Distributed Tansactions

Web Sequence Diagrams

Elasticsearch generic schema tuple based How do they do this Solr nesting indexing and querying

Cassandra aggregations/sums

Microservices best practices

Java Serializer Performance

SSL resume

Indeed Recommendation Engine

VAMP

http://www.zoomdata.com/product/embedded-data-analytics-visualization/ https://www.bottlenose.com/products http://www.striim.com/products/ Lucidworks Fusion Datastax DSE

Simple upstart script env PORT=5001 start on runlevel [2345] stop on runlevel [016] respawn setuid john chdir /home/john/Applications/my-nodejs-server/ exec node index.js Can configure environment variables in a faux  12 factor  style. NodeJS app will automatically start on boot, and stop on shutdown. Upstart will restart the app if it crashes. Runs as unpriveleged user 'john'. Upstart (1.4 and above) logs all output to  /var/log/upstart/my-nodejs-server.log  which will be rotated by logrotate. Can manage the lifecycle with  sudo service my-nodejs-server {start,stop,restart} . Can temporarily disable the app from starting on boot with an override file:  $ echo manual | sudo tee /etc/init/my-nodejs-server.override .

import java.io.IOException; import java.io.InputStream; import java.net.Inet4Address; import java.net.ServerSocket; import java.net.Socket; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; /**  * Socket listener for unit test to listen for messages.  *  * @author dev  *  */ public class SocketListener { String host; int port; ServerSocket s; ExecutorService executor = Executors.newSingleThreadExecutor(); public SocketListener(String host, int port) { this.host = host; this.port = port; } public SocketListener init() { try { s = new ServerSocket(port, 10, Inet4Address.getByName(host)); Worker worker = new Worker(); executor.submit(worker); } catch (IOException e) { throw new RuntimeException("Failed to listen", e); } return this; } public void close() { if (s != null) { try { s.close(); } catch (IOException e) { // ignore } } } public class

connecting to the AD domain controller via ldap using Apache Directory Studio. No special access required. Same as how your user authenticates on OS. ldap://10.10.10.10:636 (bind as your domain account) Search for user: Base DN: DC=youDomain,DC=smtf,DC=ds Windows account id: (sAMAccountName=tcollinsworth) Name: (displayName=Troy*)

RequestBin

jstack To quickly dump stack from command line for eclipse process jps | grep RemoteTestRunner | cut -f 1 -d ' ' | xargs jstack

jstack To quickly dump stack from command line for eclipse process jps | grep RemoteTestRunner | cut -f 1 -d ' ' | xargs jstack

-Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false

public static String getUTCDatetimeAsString() {    return LocalDateTime.now(Clock.systemUTC()); }

SonarQube

gRPC

Technology used in most popular websites Most used: Javascript 100% MySQL / MariaDB 53% Java 47% C++ 33% Python 27%

Pagination and infinite scrolling

Terraform

Prometheus.io

JWT benefits and drawbacks Where to store local storage or cookies? Local storage is easy to compromise. Use cookies and ensure XSS and CSRF protections are implemented.

PIWIK

To eliminate logging errors: unset XDG_RUNTIME_DIR To run apps and display remotely $ DISPLAY=:1 gedit or export DISPLAY=:1 gedit

Need xdotool WID= xprop -root | grep "_NET_ACTIVE_WINDOW(WINDOW)"| awk '{print $5}'; xdotool windowfocus $WID; xdotool key ctrl+shift+t $WID

StackOverflow download a color scheme for IntelliJ such as "Classic Eclipse" from http://www.ideacolorthemes.org/home/ It a jar file then you do  File > Import Settings...  and open the jar file and restart. You should also go into  Preferences > Keymap  and change to the dropdown to be eclipse sortcuts so that you can get about easier.

ngrok expose a local server behind a NAT or firewall to the internet

Backends For Frontends written by Sam Newman author of Building of Microservices

In Tyk: Create an API - mocks run before authentication, so use virtual end-point if you are mocking the API for testing Create Policy, select API under Access Rights, save and record Policy ID for entering in Auth0 Create a unique tag on the policy so that it can be queried to validate it is being used by Tyk (chicken & egg here as you have to create API before policy for rights and need to enter policy ID in API Auth) Set API Authentication Mode to JWT, HMAC, and set the secret to some plain text Set API Authentication Identity Source to sub or it will be logged that base wasn't found, using sub Set API, Policy Field Name to pol or some other unused JWT claim name This will be used to find the Tyk Policy by ID (not name) which is auto generated when the policy is created In Auth0: Set the secret to some base64 encoded plain text since Auth0 requires base64 & Tyk requires plain text In Rules : Settings add a key=value, e.g., auth0 clientId=Tyk Policy ID,

Microservices - Thrift, SOAP, REST

Synchronous REST is just a distributed monolith

Swagger focused code generation Swagger diff - are two API versions backward compatible Restlet - simple easy editor for swagger.

Webtask Sandboxing

API Transformer

Release Process Web , Chuck Rossi, Facebook Release Engineering Mobile , Chuck Rossi, Facebook talk at Google 

ThoughtWorks Technology Radar April 2016

Initially silently fails to start Run from terminal and it explains the error 32 bit lib fails to load libGl.so.1, add following to ~/.profile See  blog  entry sudo  /etc/ld.so.conf.d/skype.conf append /usr/lib32 export LD_PRELOAD="/usr/lib/i386-linux-gnu/mesa/libGL.so.1 $LD_PRELOAD" Then error mesg, see  blog  entry sudo update-alternatives --config i386-linux-gnu_gl_conf select 1 and enter sudo ldconfig

Swagger RAML Restlet  - simple easy editor for swagger.

black-screen-with-nvidia-drivers-on-ubuntu

W3Techs.com Browser Marketshare

localize.js

MkDocs  using a  theme  provided by  Read the Docs , example Sphinx  documentation generator JavaDoc with UML via UMLGRAPH JavaDoc  with UML via yWorks

Kong - auth, logging, rate limit, etc. Swagger - REST API documentation, explore/test

Spotify

Documentation Git repository

LinkedIn Samza Stream processing Kafka messaging Databus - change capture