Connector for Google Cloud Pub/Sub

The Google Cloud Pub/Sub connector allows connection to Google Cloud Pub/Sub’s message bus on a real-time streaming basis. Specifically, the connector allows Panopticon to subscribe to XML, JSON, TEXT or FIX based messages that are published on topics. The data format itself is arbitrary, and consequently, the connection includes the message definition.

 

  1. Enter the Service Account Credential JSON Text with the generated JSON key (contains the private key) in the following format:

    NOTE: Ensure that when parameterizing the values in the Credential JSON Text, there is no white space as a single line content.

  2. Click   to populate the Topic drop-down list. Initially, the first topic in the list is displayed in the Topic drop-down box. Select a topic.

  3. Click   to populate the Subscription Name drop-down list and select a subscription name.

  4. Select the Message Type.
  5. Select either the dot (.) or comma (,) as the Decimal Separator.
  6. Click    to the fetch the schema based on the connection details. Consequently, the list of columns with the data type found from inspecting the first ‘n’ rows of the input data source is populated and the Save button is enabled. 

    This also populates the Id Column with the set of columns, of arbitrary type, that can be concatenated to form a unique row identifier.

  7. You can also opt to load or save a copy of the column definition.
  8. Click   to  add columns to the Google Cloud PubSub connection that will represent sections of the message. Then enter or select:
    Property Description

    Name

    The column name of the source schema.

    Fix Tag/JsonPath/Text Column Index/XPath

    The Fix Tag/JsonPath/Text Column Index/XPath of the source schema.

    Type

    The data type of the column. Can be a Text, Numeric, or Time

    Date Format

    The format when the data type is Time.

    Enabled

    Determines whether the message field should be processed.

    To delete a column, check its  or all the column entries, check the topmost , then click .

  9. Google Cloud Pub/Sub messages can have additional metadata as custom attributes.

    Panopticon Google Cloud Pub/Sub connector supports reading these attributes as column values. The generate column logic automatically checks and generates attribute columns if messages received contain attributes.

    Additionally, like columns from message data, you can manually add them by clicking . A new entry displays.

    Name can be any unique column name within the data source. The attribute name must match an attribute name in message otherwise it will be treated as null value.  Currently all attribute columns are treated as Text columns, we can't change column type.

    Select the Enabled checkbox to enable an attribute column.

    To delete a column, check its  or all the column entries, check the topmost , then click .

  10. Date/Time values of output data and Date/Time inputs, where supported, is by default unchanged.

    You can opt to define the Show in Timezone and Source Timezone settings.

  11. For this section:

    Refer to Define Real-Time Settings for more information.

 

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