The Notification Delivery Policy Guide¶

Webhook¶

1. Create the queue with _retry_policy metadata like this:

{
    '_retry_policy': {
        'retries_with_no_delay': <Integer value, optional>,
        'minimum_delay_retries': <Integer value, optional>,
        'minimum_delay': <Interger value, optional>,
        'maximum_delay': <Interger value, optional>,
        'maximum_delay_retries': <Integer value, optional>,
        'retry_backoff_function': <String value, optional>,
        'ignore_subscription_override': <Bool value, optional>}
}

• ‘minimum_delay’ and ‘maximum_delay’ mean delay time in seconds.
• ‘retry_backoff_function’ mean name of retry backoff function. There will be a enum in Zaqar that contain all valid values. Zaqar now supports retry backoff function including ‘linear’, ‘arithmetic’,’geometric’ and ‘exponential’.
• ‘minimum_delay_retries’ and ‘maximum_delay_retries’ mean the number of retries with ‘minimum_delay’ or ‘maximum_delay’ delay time.

If value of retry_policy is empty dict, that Zaqar will use default value to those keys:

• retries_with_no_delay=3
• minimum_delay_retries=3
• minimum_delay=5
• maximum_delay=30
• maximum_delay_retries=3
• retry_backoff_function=linear
• ignore_subscription_override=False

2. Create a subscription with options like queue’s metadata below. If user don’t set the options, Zaqar will use the retry policy in queue’s metadata. If user do it, Zaqar will use the retry policy in options by default, if user still want to use retry policy in queue’s metadata, then can set the ignore_subscription_override = True.