Populating attributes automatically

This document discusses how to set up an auto-populated attribute using CloudEvents Generator.

The event library prepared by CloudEvents Generator can populate a string attribute automatically if no other values are provided. To create such an attribute, you must

• Use one of the supported formats in the attribute specification
• Set the auto field to true in the attribute specification

CloudEvents Generator will ignore all the other optional fields in the attribute specification, except for description, if auto and format are present and valid.

Supported formats

At this moment you may use one of the following formats:

• UUIDv4: Universally Unique Identifier/Version 4
• RFC3339: Date and Time on the Internet: Timestamp

The following example describes an auto-populated attribute data of the UUIDv4 format:

attributes:
    data:
        type: string
        format: UUIDv4
        auto: true