Asset Lookup¶

This stage queries the asset metadata of specified devices, including attributes, tags, and timezone information. The functions of this stage include:

Looking up asset metadata from the output record of the upstream stage by default.
Querying the asset metadata of a specified device and writing the queried data into a record that meets the input conditions.
Querying asset metadata by the specified criteria like attributes and tags.
Attaching queried results in the /attr/tslAssetLookup field.

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 asset metadata that is attached to each record. Specify the input points that hold the asset metadata, and the output points that receive the queried results.
Input Point	Yes	Specify the input point that holds the 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
Attribute	No	Specify whether to query the asset metadata by the asset attribute keys.
Tag	No	Specify whether to query the asset metadata by the asset tags.
Extra	No	Specify whether to query the asset metadata by other information, such as the OU, modelId, modelIdPath, tslInstanceName, tslInstanceDesc, label, timezone, and extraInfo.

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/tslAssetLookup	Asset	The asset metadata object.
Asset.attributes	Map	The list of asset attributes.
Asset.tags	Map	The list of asset tags.
Asset.timezone	String	The timezone of the asset.

Output Example¶

../../../_images/tsl_asset_lookup_result2.png