Active MQ - large number of connection

https://javabeat.net/deploying-activemq-for-large-numbers-of-concurrent-applications/

Understanding JTA - The Java Transaction API

https://www.progress.com/tutorials/jdbc/understanding-jta

Upload data from android to BigQuery

https://github.com/rafaelsf80/cloud-bigquery-android


how to use client library?
https://cloud.google.com/bigquery/docs/quickstarts/quickstart-client-libraries

Alexa skill

Build your first Alexa skill in 4-minutes

host-a-custom-skill-as-an-aws-lambda-function

say 

Alexa open [skill name] skill


Alexa Skill Builder - Part 3: Simplifying your code for multi-turn dialogs

Account Linking via Alexa

Alexa Notification

webrtc - samples and hacks

https://webrtchacks.com/own-phoneco-with-webrtc/


https://webrtchacks.com/baby-motion-detector/

FCM push via ARC chrome extension

you can send push via ARC  this chrome extension 
you can do it via postman as well (https://medium.com/android-school/test-fcm-notification-with-postman-f91ba08aacc3)

POST to https://fcm.googleapis.com/fcm/send

headers:

content-type  application/json

Authorization   key=[get the key from firbase messageing)

in the body write your json  

e.g. sample 

{

                ""priority"": ""high"",

                ""time_to_live"": 86400,

                ""to"": ""{0}"",

                ""notification"": {

                                                              

                        },

                ""data"": {

                            ""title"": ""{1}"",

                            ""body"": ""{2}""  

                        ""basic"":""{3}"",

                        ""firstname"":""{4}"",

                        ""lastname"":""{5}""

                        }

            }"

android sources + test - real code

all sources could be found here
https://android.googlesource.com/platform/frameworks/base

test for example need to drill down
https://android.googlesource.com/platform/frameworks/base/+/marshmallow-release/tests/