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TIBCO Rendezvous® 8.7.0

# Strategies for Using Queues and Groups

This section presents examples of several common uses of event queues and groups.

## Default Queue Only

Use the default queue as the only event queue.

Note: Programs migrating from Rendezvous 5 (and earlier) can use this technique to emulate the event dispatch system of earlier releases.

Figure 16: Default Event Queue

## Prioritize Queues within a Group

Dispatch the group, rather than individual queues. Assign queue priorities to reflect the relative priorities of their events (1 indicates the lowest, or last, priority; larger integers indicate higher priority).

This technique ensures that important events dispatch before less important events. For example, you can always dispatch a timer queue before inbound message queues, or give priority to messages with specific subjects.

Figure 17: Prioritize Event Queues in a Group

## Selectively Suspend Dispatch

Remove selected queues from a group to suspend dispatch of their events. Even when a queue has been removed from its group, events continue to accumulate. Normal dispatch resumes when you add the queue back into the group.

Figure 18: Remove Event Queues from a Group to Suspend Dispatch

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