Tutorial: OC Site Federation - How to be an OC Site

Goal of this tutorial:


The core component of the federation is the Asset-Subscription-Proxy, which subscribes itself at an Orion. Thus, the Orion notifies the Asset-Subscription-Proxy about new Assets. As soon the Asset-Subscription-Proxy gets notified, it forwards the asset to the Organicity Central Orion in am authorized way. This architecture can be seen below:

Architecture: OC Site + OC Central Orion



Using docker, it installs MongoDB, Orion and the Asset-Subscription-Proxy. We're using docker-compose, thus install it first:

sudo curl -L "https://github.com/docker/compose/releases/download/1.11.2/docker-compose-$(uname -s)-$(uname -m)" -o /opt/docker-compose
sudo chmod 755 /opt/docker-compose

Next, get the config files

sudo curl -L "https://raw.githubusercontent.com/OrganicityEu/docker/master/mongo%2Borion%2Basset-subscription-proxy.yml" -o /opt/mongo+orion+asset-subscription-proxy.yml
sudo curl -L "https://raw.githubusercontent.com/OrganicityEu-Platform/Asset-Subscription-Proxy/master/config.js.docker" -o /opt/organicity-asset-subscription-proxy-config.js

Add your credentials (e.g., client-id and client secret) to the /opt/organicity-asset-subscription-proxy-config.js and run the following:

/opt/docker-compose -f /opt/mongo+orion+asset-subscription-proxy.yml up

This installs and starts MongoDB, Orion and the Asset-Subscription-Proxy. If it was successful, you will see the subscription of the Asset-Subscription-Proxy at the Orion:

Successful: /v2/subscriptions/57ea49394735cf79905858c0


Install the Asset-Subscription-Proxy

To push assets to the Organicity Central Orion, please clone the repository of the Asset-Subscription-Proxy and configure it:

git clone https://github.com/OrganicityEu-Platform/Asset-Subscription-Proxy.git
cd Asset-Subscription-Proxy
cp config.js.example config.js

Next, install the Dependencies:

npm install

Configure the Asset-Subscription-Proxy

Edit the config.js by applying your client_id and client_secret.

For the Dev-Server, make sure the following configuration is used:

config.asset_directory_host = 'dev.orion.organicity.eu';
config.asset_directory_port = '443';
config.asset_directory_protocol = 'https'

For the Production Server, make sure the following configuration is used:

Afterwards, you can start the proxy:

node server

Add Subscription to your local Orion

Edit the config.js by applying your Orion configuration. In this tutorial we assume, that the Orion runs on localhost:1026:

Thus, use the following configuration:

config.orion_host = 'localhost';
config.orion_port = 1026;
config.orion_protocol = 'http';

The default subscription_url is http://localhost:9999. If this is wrong (e.g., Orion and Asset-Subscription-Proxy run on different machines), please modify the config.subscription_url.

Afterwards, you can initiate the subscription:

node subscribe

If it was successful, you will see the subscription of the Asset-Subscription-Proxy at the Orion:

Successful: /v2/subscriptions/57ea49394735cf79905858c0

+Hint: You can run this only once. Otherwise, you have multiple subscriptions.

To unsubscribe, run:

node unsubscribe

Verify subscription at your local Orion

Now you can verify your subscription:

GET http://localhost:1026/v2/subscriptions/57ea49394735cf79905858c0
Accept: application/json
Fiware-Service: organicity

Push an Asset to your local Orion

Test the federation. Keep the log of the Asset-Subscription-Proxy (or the docker log) open. Create an asset at your local orion, with:

An example (client ID ocsite-test):

POST http://{IP}:1026/v2/entities
Accept: application/json
Content-Type: application/json
Fiware-Service: organicity

  "id": "urn:oc:entity:test:1",
  "type": "urn:oc:entityType:demo",
  "TimeInstant": {
    "type": "urn:oc:attributeType:ISO8601",
    "value": "2016-10-04T13:45:00.000Z"

The local Orion should send a notification to the Asset-Subscription-Proxy, which pushes the asset to the Organicity Central Orion. You should see messages like

2017-04-18 15:11:43.547  - DEBUG: Organicity-subscription-proxy - ### Try to update asset
2017-04-18 15:11:43.547  - INFO: Organicity-subscription-proxy - Asset updating: urn:oc:entity:test:1
2017-04-18 15:11:44.231  - DEBUG: Organicity-subscription-proxy - Update failed.
2017-04-18 15:11:44.231  - DEBUG: Organicity-subscription-proxy - ### Try to create asset
2017-04-18 15:11:44.231  - INFO: Organicity-subscription-proxy - Asset creating: urn:oc:entity:test:1
2017-04-18 15:11:44.907  - INFO: Organicity-subscription-proxy - Asset created: urn:oc:entity:test:1
2017-04-18 15:11:44.907  - DEBUG: Organicity-subscription-proxy - All assets handled!

Hint: There are always two steps (update and create) required to create an asset.