Accounts

This is an example of an application using Vert.x and Crabzilla

Eventmodeling

Requirements

Java 11
Maven
Docker compose

Building

1 - Start Postgres:

docker-compose up

2 - Build it, running both unit and integration tests:

mvn clean install

Running

1 - Start Postgres:

docker-compose up

2 - Run the accounts-api service:

cd accounts-api
mvn clean compile exec:java

3 - Run the accounts-integration service:

cd accounts-integration
mvn clean compile exec:java

4 - Optionally, you can start as many accounts-integration service instances you want for High Availability: just start it again in another terminal. Any projector or processor verticle is a singleton instance within the cluster. Just open another terminal and:

cd accounts-integration
mvn exec:java

5 - Optionally, you can recreate the database from scratch:

docker-compose down -v

Transfer test

Open an account 1 with 110.00 and 2 with 0.00 then make a 100.00 transfer from account 1 to 2:

docker run --network host -i loadimpact/k6 run - <./k6/transfer.js

Stress test

Opening many accounts with 1000 virtual users during 60 seconds:

docker run --network host -i loadimpact/k6 run --vus 1000 --duration 60s - <./k6/open-many-accounts.js

And you will see something like:

         /\      |‾‾| /‾‾/   /‾‾/
     /\  /  \     |  |/  /   /  /
    /  \/    \    |     (   /   ‾‾\
   /          \   |  |\  \ |  (‾)  |
  / __________ \  |__| \__\ \_____/ .io

  execution: local
     script: -
     output: -

  scenarios: (100.00%) 1 scenario, 1000 max VUs, 1m30s max duration (incl. graceful stop):
           * default: 1000 looping VUs for 1m0s (gracefulStop: 30s)
     data_received..................: 82 MB  1.4 MB/s
     data_sent......................: 43 MB  711 kB/s
     http_req_blocked...............: avg=663.44µs min=993ns    med=2.46µs   max=279.93ms p(90)=3.99µs   p(95)=5.07µs
     http_req_connecting............: avg=650.65µs min=0s       med=0s       max=279.88ms p(90)=0s       p(95)=0s
     http_req_duration..............: avg=379.85ms min=284.4ms  med=346.22ms max=1.87s    p(90)=437.34ms p(95)=509.92ms
       { expected_response:true }...: avg=379.85ms min=284.4ms  med=346.22ms max=1.87s    p(90)=437.34ms p(95)=509.92ms
     http_req_failed................: 0.00%  ✓ 0           ✗ 157518
     http_req_receiving.............: avg=54.7µs   min=11.63µs  med=29.34µs  max=32.65ms  p(90)=61.89µs  p(95)=100.09µs
     http_req_sending...............: avg=60.78µs  min=6.77µs   med=14.75µs  max=100.11ms p(90)=24.11µs  p(95)=32.08µs
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s       p(90)=0s       p(95)=0s
     http_req_waiting...............: avg=379.73ms min=284.34ms med=346.16ms max=1.87s    p(90)=437.24ms p(95)=509.85ms
     http_reqs......................: 157518 2612.393035/s
     iteration_duration.............: avg=380.82ms min=284.61ms med=346.51ms max=2.05s    p(90)=437.68ms p(95)=510.22ms
     iterations.....................: 157518 2612.393035/s
     vus............................: 1000   min=1000      max=1000
     vus_max........................: 1000   min=1000      max=1000