DESTINATION_ORDER
[QoS Policies]

Controls the criteria used to determine the logical order among changes made by DDS::Publisher entities to the same instance of data (i.e., matching DDS::Topic and key). More...

Classes

struct  DDS::DestinationOrderQosPolicy
 Controls how the middleware will deal with data sent by multiple DDS::DataWriter entities for the same instance of data (i.e., same DDS::Topic and key). More...

Enumerations

enum  DDS::DestinationOrderQosPolicyKind {
  DDS::BY_RECEPTION_TIMESTAMP_DESTINATIONORDER_QOS,
  DDS::BY_SOURCE_TIMESTAMP_DESTINATIONORDER_QOS
}
 Kinds of destination order. More...

Functions

static System::String^ DDS::DestinationOrderQosPolicy::get_destinationorder_qos_policy_name ()
 Stringified human-readable name for DDS::DestinationOrderQosPolicy.

Detailed Description

Controls the criteria used to determine the logical order among changes made by DDS::Publisher entities to the same instance of data (i.e., matching DDS::Topic and key).


Enumeration Type Documentation

Kinds of destination order.

QoS:
DDS::DestinationOrderQosPolicy
Enumerator:
BY_RECEPTION_TIMESTAMP_DESTINATIONORDER_QOS  [default] Indicates that data is ordered based on the reception time at each DDS::Subscriber.

Since each subscriber may receive the data at different times there is no guaranteed that the changes will be seen in the same order. Consequently, it is possible for each subscriber to end up with a different final value for the data.

BY_SOURCE_TIMESTAMP_DESTINATIONORDER_QOS  Indicates that data is ordered based on a time-stamp placed at the source (by RTI Data Distribution Service or by the application).

In any case this guarantees a consistent final value for the data in all subscribers.

See also:
Special Instructions if Using ‘Timestamp’ APIs and BY_SOURCE_TIMESTAMP Destination Ordering:


Function Documentation

static System::String ^ DDS::DestinationOrderQosPolicy::get_destinationorder_qos_policy_name (  )  [inline, static, inherited]

Stringified human-readable name for DDS::DestinationOrderQosPolicy.


RTI Data Distribution Service .Net APIs Version 4.5c Copyright © 9 Jun 2010 Real-Time Innovations, Inc