Quick Start

This quick start section will help you get going with a HAT PDA and start testing the API in a matter of minutes. There are a few ways to get a running HAT PDA and the approach will depend on your skills level, available time and the actual purpose.

Get a sandbox HAT PDA from Developers Portal

The registration process is quick and straightforward. You can read more about how to create an account here. Normally, you should be able to get up and running with a new HAT PDA in a matter of minutes.

Run postman collection

You can find our postman collection here. The collection is able to run using a predefined managed HAT PDA (postman.hubat.net). If you choose to use that account, please keep in mind that other developers can see the data in this HAT PDA, DO NOT write any sensitive information on this HAT PDA. If you want to avoid using a HAT PDA with other developers you can use your personal HAT PDA by replacing the following environment variables in postman:

  • hat — your HAT PDA address, eg. postman.hubat.net
  • username — the first part of the HAT PDA address, eg. postman
  • password — the password of your HAT PDA

The goal of the collection is to showcase basic operations on a HAT PDA. The collection aims to showcase how you can:

  • authenticate with a HAT PDA
  • perform CRUD operations
  • use advanced techniques to bundle data
  • work with data debits
  • upload files
  • fetch and setup existing applications, data plugs and tools

About the project

The Hub-of-All-Things is a HAT Microserver for individuals to own, control and share their data.

A Personal Microserver (“the HAT”) is a personal single tenant (“the individual self”) technology system that is fully individual self-service, to enable an individual to define a full set of “meta-data” defined as a specific set of personal data, personal preferences and personal behaviour events.

The HAT enables individuals to share the correct information (quality and quantity), with the correct people, in the correct situations for the correct purposes and to gain the benefits.

Technology stack

This HAT Microserver implementation is written in Scala (2.12.11) uses the following technology stack:

1. Get the Source and the submodules for both of the methods

> git clone https://github.com/Hub-of-all-Things/HAT2.0.git
> cd HAT2.0
> git submodule init 
> git submodule update

2. Configure your /etc/hosts   bobtheplumber.hat.org   bobtheplumber.example.com

3a. Using docker-compose

> cd <DIRECTORY_YOU_CHECKED_OUT_INTO>/deployment/docker
> docker-compose up

When the build finishes, open https://bobtheplumber.example.com:9001 in a browser. Standard account login password is testing.

3b. Building locally

HAT Setup

HAT runs as a combination of a backing PostgreSQL database (with a public schema for flattened data storage) and a software stack that provides logic to work with the schema using HTTP APIs.

To run it from source in a development environment two sets of tools are required:

To launch the HAT, follow these steps:

  1. Create the database, which we assume is available as localhost:

    > createdb testhatdb1
    > createuser testhatdb1
    > psql postgres -c "GRANT CREATE ON DATABASE testhatdb1 TO testhatdb1"
  2. Compile the project:

    > sbt compile
  3. Add custom local domain mapping to your /etc/hosts file. This will make sure when you go to the defined address from your machine you will be pointed back to your own machine. E.g.:   bobtheplumber.hat.org
  4. Run the project:

    > sbt "project hat" "run -Dconfig.resource=dev.conf"
  5. Go to http://bobtheplumber.hat.org:9000

You're all set!

Customising your development environment

Your best source of information on how the development environment could be customised is the hat/conf/dev.conf configuration file. Make sure you run the project locally with the configuration enabled (using the steps above) or it will just show you the message that the HAT could not be found.

Among other things, the configuration includes:

  • host names alongside port numbers of the test HATs (http://yourname.hat.org:9000)
  • access credentials used to log in as the owner or restricted platform user into the HAT (the default password is a very unsafe testing)
  • database connection details (important if you want to change your database setup above)
  • private and public keys used for token signing and verification

Specifically, it has 4 major sections:

  • Enables the development environment self-initialisation module:

    play.modules {
      enabled += "org.hatdex.hat.modules.DevHatInitializationModule"
  • Sets the list of database evolutions to be executed on initialisation:

    devhatMigrations = [
  • devhats list sets out the list of HATs that are served by the current server, for each including owner details to be initialised with and database access credentials. Each specified database must exist before launching the server but are initialised with the right schema at start time
  • hat section lists all corresponding HAT configurations to serve, here you could change the HAT domain name, owner's email address or public/private keypair used by the HAT for its token operations

Using docker-compose

We have put together a docker-compose file that will allow you to run a PostgreSQL node and a HAT node easily.

  1. Get the Source and the submodules

    git clone https://github.com/Hub-of-all-Things/HAT2.0.git cd HAT2.0 git submodule init git submodule update

Additional information