Real Time Information Director User Documentation

Technical Overview of the Real Time Information Director
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Subscriptions
The Subscription Module serves the needs of applications that must be notified of
specific changes in the Data Store. A “subscription” specifies the triggering event and
the format of the document to be delivered to the subscribing application. The
Subscription Module supports any document format defined in the metadata; it uses a
Document Handler to construct the required message. The RTSC solution includes a set
of predefined (“canned”) subscriptions that can be extended to satisfy application needs.
Like other components of the Director, the Subscription Module runs in a NonStop WLS
environment on the NonStop Server. The Subscription Module includes
• An interface for registering and managing subscriptions
• A component that recognizes database events and notifies subscribers by posting
documents in JMS queues.
The following figure represents the architecture of the Subscription Module in the context
of a Real Time Supply Chain (RTSC) solution. Labels in the figure are highlighted in the
subsequent text.
NonStop WLS
Integration Server (XI,
WebMethods)
Enterprise Application
(e.g., Viewlocity)
JMS Topics/Queues
Subscription Server
Message
Assembler
Format and Content
Metadata
RTSC Data Store
Subscription
Registration
Interface
Stored
Subscriptions
Figure 4. Subscription Interface