Skip to content

Relationship Retrieval Profile

The performance of programmatically retrieving existing relationship instances based on their ID.

The Open Metadata Repository Services (OMRS) interface for a metadata repository defines methods for retrieving relationship instances by their ID:

Method Description
isRelationshipKnown retrieves a relationship instance's details, if available, or returns null if not
getRelationship retrieves a relationship instance's details, if available, or throws an exception if not
Assertions
ID Description
repository-relationship-retrieval-performance-isRelationshipKnown See (2) in detailed logic below.
repository-relationship-retrieval-performance-getRelationship See (3) in detailed logic below.

For every relationship type supported by the technology under test, this profile does the following (in order):

  1. Searches for instancesPerType relationship GUIDs of that type. (This uses findRelationships and its performance is recorded as part of the relationship search profile.)
  2. For each of these relationship GUIDs, isRelationshipKnown is called to retrieve it.
  3. For each of these relationship GUIDs, getRelationship is then called to retrieve its details.

Example

So, for example, if the technology under test supports 50 relationship types, and the instancesPerType parameter is set to 100, then this profile will retrieve 50 (types) x 100 (instances per type) x 2 (operations) = 10 000 relationships. (And it will run findRelationships 50 times.)

Caveats

Note the following caveats:

  • The same GUIDs are used for each retrieval, but each method is run against every GUID before moving onto the next method.
Back to top