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Origin Seeker Remediation Governance Action Service

Connector summary

An asset may have an origin classification attached that documents various properties about its origin. The Origin Seeker Remediation Governance Action Service sets up the origin classification on an asset by navigating backwards through the lineage relationships to locate origin classifications attached to the assets in the lineage graph.

Figure 1

Figure 1: Operation of the origin seeker remediation governance action service

Origin seeker is only able to assign an origin to the asset if at least on of the assets in its lineage has an origin classification, and where there are multiple assets. If one (and only one) is found, it is assigned to the action target asset.

Figure 2 shows a simple example of origin seeker finding an origin in a no-branching lineage graph.

Figure 2

Figure 2: Origin assigned because one origin classification found

Figure 3 shows the origin coming from multiple branches of the lineage graph, but they are all the same, so the same values can be assigned.

Figure 3

Figure 3: Origin assigned because consistent origin classifications found

Figure 4 shows a case where origin seeker fails because the asset's lineage shows it to have been derived from multiple origins.

Figure 4

Figure 4: Origin not assigned because inconsistent origin classifications found

Finally the origin is not assigned because there are no origin classifications in the lineage graph.

Figure 5

Figure 5: Origin not assigned because no origin classifications found

Configuration

This connector uses the Governance Action OMES running in the Engine Host.

This is its connection definition to use when creating the definition of the governance action service using the Governance Engine OMAS. Note that is does not use configuration properties.

{
   "connection" : { 
                      "class" : "Connection",
                      "connectorType" : 
                      {
                           "class" : "ConnectorType",
                           "connectorProviderClassName" : "org.odpi.openmetadata.adapters.connectors.governanceactions.remediation.OriginSeekerGovernanceActionProvider"           
                      }
                  }
}

Governance Action Settings

When this governance action service is called through a GovernanceAction it supports the following options.

Request Types and Parameters

Origin seeker does not specifically recognize any request types or request parameters.

Action Targets

The asset that needs an origin classification is linked to the governance action as an action target. The unique identifier (guid) can be passed as a parameter when the governance action or governance action process is initiated.

Completion Status and Guards

These are the responses that origin seeker produces:

  • CompletionStatus.ACTIONED with guard origin-assigned if a single origin is detected in all branches of the lineage graph.
  • CompletionStatus.ACTIONED with guard origin-already-assigned if the asset already has an origin set up.
  • CompletionStatus.INVALID with guard multiple-origins-detected if multiple, different origins are detected in the lineage graph.
  • CompletionStatus.INVALID with guard no-origins-detected if no origin classifications are found in the lineage graph.
  • CompletionStatus.FAILED with guard no-targets-detected if there is no asset set up as an action target.
  • CompletionStatus.FAILED with guard multiple-targets-detected if there are multiple assets set up as action targets.
  • CompletionStatus.FAILED with guard origin-seeking-failed for an unrecoverable error such as a not authorized response from the metadata repository.

Examples of use

The Open Metadata Labs: this connector is configured in the governDL01 engine host server as part of the automated curation asset management lab.

Suggested Enhancements

This governance action service could be enhanced as follows:

  • Support a default origin through the configuration properties/request parameters to use if no origin is found in the lineage graph.

  • Provide logic to blend the origin properties when multiple origins are detected. This type of change would need knowledge of the origin properties used in the installation to know which are valid to combine.



License: CC BY 4.0, Copyright Contributors to the ODPi Egeria project.

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