Expand description
Data sample must implement Keyed
to be used in a WITH_KEY topic.
It allows a Key to be extracted from the sample. In its simplest form, the key may be just a part of the sample data, but it can be anything computable from an immutable sample by an application-defined function. It is recommended that this function be lightwieght to compute.
The key is used to distinguish between different Instances of the data in a DDS Topic.
A Keyed
type has an associated type K
, which is the corresponding key
type. K
must implement Key
. Otherwise, K
can be chosen to suit the
application. It is advisable that K
is something that can be cloned with
reasonable effort.
Required Associated Types
Required Methods
Implementations on Foreign Types
sourceimpl<D: Keyed> Keyed for &D
impl<D: Keyed> Keyed for &D
Key for a reference type &D
is the same as for the value type D
.
This is required internally for the implementation of NoKey topics.