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# DistributedNotificationCenter.SuspensionBehavior

These constants specify the types of notification delivery suspension behaviors.

```
enum SuspensionBehavior
```

## Topics

### Constants

[`DistributedNotificationCenter.SuspensionBehavior.drop`](/documentation/Foundation/DistributedNotificationCenter/SuspensionBehavior/drop)

The server doesn’t queue any notifications with this name and object until the notification center resumes notification delivery.

[`DistributedNotificationCenter.SuspensionBehavior.coalesce`](/documentation/Foundation/DistributedNotificationCenter/SuspensionBehavior/coalesce)

The server only queues the last notification of the specified name and object; earlier notifications are dropped. In cover methods for which suspension behavior is not an explicit argument, `NSNotificationSuspensionBehaviorCoalesce` is the default.

[`DistributedNotificationCenter.SuspensionBehavior.hold`](/documentation/Foundation/DistributedNotificationCenter/SuspensionBehavior/hold)

The server holds all matching notifications until the queue has been filled (queue size determined by the server), at which point the server may flush queued notifications.

[`DistributedNotificationCenter.SuspensionBehavior.deliverImmediately`](/documentation/Foundation/DistributedNotificationCenter/SuspensionBehavior/deliverImmediately)


---

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