Created question in FIWARE Q/A platform on 25-05-2016 at 14:05
Please, ANSWER this question AT http://stackoverflow.com/questions/37437225/fiware-orion-context-broker-subscriptions-condition-does-not-work

Question:
Fiware Orion context broker subscriptions condition does not work

Description:
I am using Orion Context Broker version 1.1.0

I had the only entity in my DB:

{
"id"=>"Room1",
"type"=>"Room",
"temperature"=>{"type"=>"none", "value"=>10, "metadata"=>{}}
}

I did not have any subscription.

Then I created 3 subscriptions:

[
{
"subject"=>{"entities"=>[

],
"condition"=>{"attrs"=>["temperature"], "expression"=>

}}
},
{
"subject"=>{"entities"=>[

],
"condition"=>{"attrs"=>["temperature"], "expression"=>

}}
}
]

As you can see, the difference is only in the expressions: temperature>10, temperature<10, temperature==10.

So that any time I change the Room1 temperature I should have only one subscription triggering the notification.

But it does not work as it should !!!

Each time I change the temperature, I have all 3 notifications.

However, when subscriptions were created, only one of them triggered a notification, depending on the temperature value of the Room1. It worked as expected.

But when Room1 temperature is changed, it does not work correctly and triggers all 3 notifications.