Parent Asset Lookup


This stage queries the parent node of a specified asset on an asset tree. The functions of this stage include:

  • Specifying the asset tree by asset tree tags.

  • Querying the parent node of the asset related to the input point.

  • Querying only 1 level of parent node on the asset tree by default.

  • Support the querying of the parent node of a specified node on the asset tree.

  • Attaching queried results in the /attr/tslParentLookup field.

  • If the queried node has no associated parent nodes, a list of length 1 will still be output in /attr/tslParentLookup, encapsulating treeId information.

Configuration

The configuration tabs for this stage are General, Basic, Input/Output, and Criteria.

General

Name

Required?

Description

Name

Yes

The name of the stage.

Description

No

The description of the stage.

Stage Library

Yes

The streaming operator library to which the stage belongs.

Required Fields

No

The fields that the data records must contain. If the specified fields are not included, the record will be filtered out.

Preconditions

No

The conditions that must be satisfied by the data records. Records that do not meet the conditions will be filtered out. For example, ${record:value('/value') > 0}. For the syntax of EL expressions, see Expression Language.

On Record Error

Yes

The processing method for error data.

  • Discard: Error data will be discarded and ignored

  • Send to Error: Error messages will be reported

  • Stop Pipeline: The pipeline will be stopped

Basic

Name

Required?

Description

Quality Filter

No

Filter the data according to the data quality. Only records that meet the quality conditions will be processed by this stage.

Input/Output

Name

Required?

Description

Input/Output

Yes

The parent asset metadata that is attached to each record. Specify the input points that hold the parent asset metadata, and the output points that receive the queried results.

Input Point

Yes

Specify the input point that holds the parent asset metadata, using the format {modelId}::{pointId}.

Output Point

Yes

Specify the output point that receives the queried results, using the format {modelId}::{pointId}.

Criteria

Name

Required?

Description

Tree Tag

Yes

Specify the tag of the asset tree, using the format {tag key}::{tag value}.

Attribute

No

Specify whether to query the parent asset metadata by the asset attribute keys.

Tag

No

Specify whether to query the parent asset metadata by the asset tags.

Extra

No

Specify whether to query the parent asset metadata by other information, such as the modelId, modelIdPath, name, inValid, description, createTime, label, and timezone.

Output Results

The output results of this stage are included in the attr struct. The description of the fields are as follows:

Name

Data Type

Description

/attr/tslParentLookup

List<Parent>

The parent asset metadata object.

List index

Int

The index of the parent asset.

treeId

String

The ID of the asset tree to which the parent asset is bound.

assetId

String

The asset ID of the parent asset.

attributes

List<attributeId>

The list of parent asset attributes.

tags

List<tagId>

The list of parent asset tags.

timezone

String

The timezone of the parent asset.

Output Example

../../../_images/tsl_parent_asset_lookup_result2.png ../../../_images/tsl_parent_asset_lookup_result_21.png