Publishers

The Publishers (meta_md_publisher) resource stores the messaging system's publishers.

• A publisher is a resource that waits for a certain event to happen. When it does (i.e. when the event occurs), a message is written to the messaging system's message queue. The message is subsequently read and reacted to by a message subscriber.

• A publisher (i.e. the metadata engine) exists that can monitor for any type of database change. For example, you could define a publisher that advises the credit manager whenever the credit limit of a customer is changed.

• When creating a subscription, the publisher attributes are copied to the subscription. These attributes (or user-configurable flags) are described in the Publishers search result set. Click on the hyperlink titled Documentation to see what settings are supported for each of the publishers.

• Typically maintained by a user assigned the Meta Administrator role, but may be accessed by any user with sufficient permissions to access the view.

The following list defines every field available in the publishers (md_publish) table in alphabetical order:

• Created By - displays the name of the user who created the record you are viewing or maintaining. May not be overridden.

• Created On - displays the date on which the record that you are creating or maintaining was created. May not be overridden. May also represent the creation date of the records you are attempting to retrieve.

• Description - an expression column that shows the publisher's description in the session language.

• Description Literal Key - the literal key for the publisher description.

• Documentation - this field is not maintainable. The multimedia artifact type column used to display an HTML page providing documentation on the messages produced by the publisher.
  • Since messages are typically in XML format, a publisher could provide a sample XML message, or an XML Schema definition (an XSD file). The HTML page should provide links to this type of documentation.

  • This documentation could help a developer write a subscriber resource, in particular, it will explain the format of the message that was posted by the publisher.

• Modification Counter - this field is not maintainable. The date and time a given record was last modified.

• Modified By - this field is not maintainable. The user or system process that last modified the record.

• Modified On - this field is not maintainable. The date on which the record was last modified.

• Publisher Name - this field is maintainable in creation mode only, when it appears in the key subview. The publisher's unique identifier.

For the functionality of each action (i.e. button) available on this view, refer to the About the Actions topic.