Point Lookup


This stage queries the tags of a specified asset measurement point. The functions of this stage include:

  • Supporting the querying of the information of a point related to the input record.

  • Supporting the querying of the specified tags.

  • Supporting the querying of the customized pointId, which must belong to the same device with the input point.

  • Attaching queried results in the /attr/tslPointLookup 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 measurement point attribute data that is attached to each record. Specify the input points that hold the measurement point attribute data, and the output points that receive the queried results.

Input Point

Yes

Specify the input point that holds the measurement point attribute data, 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

Tag

No

Specify whether to query the measurement point attribute data by tags.

Extra

No

Specify whether to query the measurement point attribute data by other information, such as name, desc, accessMode, dataType, createTime, priority, unit, signalType, and hasQuality.

Output Results

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

Name

Data Type

Description

/attr/tslPointLookup

Point

The point attribute information object.

tags

Map

The list of measuring point tags.

Output Example

../../../_images/tsl_point_lookup_result3.png