Hydra Order Management System (HOMS)

HOMS is an open source web application for order and business process management.

Application consists of three parts:

• User interface - managing orders and tasks for registered users (Single Page Application).
• Administrator interface - managing users and order types.
• REST API - operations with orders and users.

Requirements:

• Docker
• docker-compose

Compatibility:

• Camunda 7.9.0 compatible with PostgreSQL 9.1 / 9.3 / 9.4 / 9.6
• Minio latest release

Resources:

• Documentation: http://hydra-oms.com/docs
• Demo: http://demo.hydra-oms.com
• Tickets/Issues: https://github.com/latera/homs/issues

Installation

The preferred way to install HOMS is to use Docker.

In production

1. Download docker-compose.yml and default .env config file:

   wget https://raw.githubusercontent.com/latera/homs/master/docker-compose.yml
   wget https://raw.githubusercontent.com/latera/homs/master/.env.sample -O .env

   📌 All variables are set in .env file. There you can change them, if you want to.

2. For OS X users: make path to folder with config shared in Docker -> Preferences... -> File Sharing.

3. Set SECRET_KEY_BASE variable in your .env with uniq id as value. You can generate key with openssl rand -hex 64 command. For example:

   SECRET_KEY_BASE=0750fd0eac13032778f0a42e2ab450003eaece477ea881501be0cc438f870a2f498dbbc00ffb7c8379c30c960568a402d315496bb7bc2b3ee324401ba788a

   ⚠️ Make sure this key is secret and don't share it with anyone.

4. Change Minio credentials in .env file. Generate MINIO_ACCESS_KEY and MINIO_SECRET_KEY values with any credentials generator, e.g. pwgen 32 2.

5. Run docker-compose:

   docker-compose up -d

6. Navigate to Minio control panel and create a bucket with name equal to MINIO_BUCKET_NAME value from .env file.

7. Login to HydraOMS with [email protected]/changeme. Now you are able to start Pizza Order demo process.

You can login to Camunda Admin interface with credentials equal to BPM_USER:BPM_PASSWORD values from .env file (user/changeme if these variables aren't set).

In development

1. Follow the instructions below:

   • With Oracle Instant Client.

   • Without Oracle Instant Client (default way).

2. Navigate to Minio control panel and create a bucket with name equal to MINIO_BUCKET_NAME value from .env file.

3. Export all variables from .env file

   export $(cat .env | xargs)
   

4. Change in bpm.yml value of development.base_url from http://camunda:8080/engine-rest/ to http://localhost:8766/engine-rest/

5. In database.yml change value of development.host from <%= ENV['HOMS_DB_HOST'] %> to localhost

6. Install Yarn and run:

   yarn install
   

7. Compile assets:

   yarn dev

8. Start HOMS application in another console tab:

   rails s

9. Create and populate the database (adds an admin user, initial order types, and orders):

   rails db:migrate
   export SEED_DB=true
   rails db:seed

10. Log in at HydraOMS with [email protected]/changeme.

Updating dependencies

• Update gems:

  bundle update
  

• Update js packages:

  yarn upgrade-interactive --latest
  

  Do not update:
  • bootstrap and related packages
  • jquery and related packages

Work with SSO

Requirements:

• Keycloak

For using SSO with HOMS:

1. Add user roles. HOMS use "admin" and "user" client level roles. Only one role could be assigned to user.
2. Add user attributes in Keycloak: company, department.
3. Add mappers in Keycloak without prefix:

Name	Mapper type	User attribute	Token clain name	Claim JSON type	Add to ID token	Add to access token	Add to userinfo	Multivalued	Aggregate attributes values
company	User Attribute	company	company	string	On	On	On	Off	Off
department	User Attribute	department	department	string	On	On	On	Off	Off

3. Add to HOMS config file homs_configuration.yml:

sso:
  enabled: true
  use_regular_login: true
  keycloak:
    auth_server_url: "http://keycloak_host:keycloak_port/auth/"
    realm: hydra
    client_id: homs
    redirect_uri: "http://homs_host:homs_port/authenticate_by_keycloak"
    secret: "af9504fc-b030-405e-97b6-813220c07a7e"
    logout_redirect: "http://homs_host:homs_port"
    scope:
      - homs

Filter business processes by user

Set cadidate_starters.enabled in hbw.yml to true to send user email to camunda when fetching business processes definition. That way you can allow users to run only certain business processes.

Contributing/Development

The general development process is:

1. Fork this repo and clone it to your workstation.
2. Create a feature branch for your change.
3. Write code and tests.
4. Push your feature branch to github and open a pull request against master.

Reporting Issues

Issues can be reported by using GitHub Issues.

Testing

HOMS uses RSpec for unit/spec tests. You need to set up different testing database. Otherwise your development DB would be erased.

# Run all tests
bundle exec rspec spec

# Run a single test file
bundle exec rspec spec/PATH/TO/FILE_spec.rb

# Run a subset of tests
bundle exec rspec spec/PATH/TO/DIR

HBW Widget uses jest and snapshots for tests.

# Run frontend tests
jest
# Update snapshots after intentionally changing implementation elements
jest --updateSnapshot

Upgrade PostgreSQL

To upgrade PostgreSQL (HOMS database) to the 15.4 version, we recommend using the pg_dumpall utility:

1. Copy service db_homs as db_homs_new in docker-compose.yml
2. In db_homs_new set image: postgres:15.4, change volume to ./data/homs_new/postgresql:$HOMS_DB_PATH, port to 15432:5432, container name to postgres-homs-new
3. Run db_homs_new and db_homs services docker-compose up db_homs db_homs_new. Wait for postgres instances to start up
4. Dump db_homs data to file: docker exec -it postgres-homs /usr/bin/pg_dumpall -U homs > dumpfile
5. Upload data to db_homs_new: docker exec -i postgres-homs-new psql -U homs < dumpfile
6. Stop db_homs_new and db_homs containers. Replace old volume: rm -rf ./data/homs && mv ./data/homs_new ./data/homs
7. In db_homs set image: postgres:15.4, remove db_homs_new in docker-compose.yml
8. Re-hash password for HOMS_DB_USER: source .env && docker exec -it postgres-homs psql -U $HOMS_DB_USER, \password, enter twice value of HOMS_DB_PASSWORD from .env file and enter quit;

Links

1. Repo with helper classes for BPMN development.

2. Example of creating a demo business process.

License

Copyright (c) 2019 Latera LLC under the Apache License.