Home
Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for HCL OneDB™.
HCL OneDB™ extensions and DataBlade® modulesThese topics describe how to use built-in database extensions and separately installed DataBlade® modules.
Database Extensions User's GuideThe HCL OneDB™ Database Extensions User's Guide explains how to use the database extensions that come with HCL OneDB™: Large Object Locator, MQ messaging, binary data types, basic text search, node data type, HCL OneDB™ web feature service for Geospatial Data, and SQL packages.
MQ Messaging (WMQ) messaging products provide an infrastructure for distributed, asynchronous communication of data in a distributed, heterogeneous environment. The WMQ message queue allows you to easily exchange information across platforms.
About MQ messagingYou can use either functions or tables to communicate between a database server application and the queue.
VerificationAfter completely the necessary configuration, verify that MQ messaging is working correctly.
Publish and subscribe to a queuePublishing and subscribing to a queue is an effective way of exchanging information between multiple users.

Publish and subscribe to a queue

Publishing and subscribing to a queue is an effective way of exchanging information between multiple users.

MQ messaging interacts directly with the WMQ Publish/Subscribe component. The component allows a message to be sent to multiple subscribers based on a topic. Users subscribe to a topic, and when a publisher inserts a message with that topic into the queue, the WMQ broker routes the messages to all of the queues of each specified subscriber. Then, the subscriber retrieves the message from the queue.