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Weighted Distributed Queue: Configuration: General
Configuration Options Related Tasks Related Topics
Use this page to define the general configuration of a weighted distributed queue, whose members can carry extra message load or have extra capacity.
Configuration Options
Name Description Name The name of this weighted distributed queue.
JNDI Name The name used to bind a virtual destination to the JNDI tree. Applications can use the JNDI name to look up the virtual destination.
If not specified, then the destination is not bound into the JNDI namespace.
MBean Attribute (Does not apply to application modules):
DistributedDestinationBean.JNDINameLoad Balancing Policy Determines the load balancing policy for producers sending messages to a distributed destination in order to balance the message load across the members of the distributed set.
- Round-Robin
- The system maintains an ordering of physical topic members within the set by distributing the messaging load across the topic members one at a time in the order that they are defined in the configuration file. Each WebLogic Server maintains an identical ordering, but may be at a different point within the ordering. If weights are assigned to any of the topic members in the set, then those members appear multiple times in the ordering.
- Random
- The weight assigned to the topic members is used to compute a weighted distribution for the members of the set. The messaging load is distributed across the topic members by pseudo-randomly accessing the distribution. In the short run, the load will not be directly proportional to the weight. In the long run, the distribution will approach the limit of the distribution. A pure random distribution can be achieved by setting all the weights to the same value, which is typically set to 1.
MBean Attribute (Does not apply to application modules):
DistributedDestinationBean.LoadBalancingPolicyForward Delay The number of seconds after which a distributed queue member with no consumers will wait before forwarding its messages to other distributed queue members that do have consumers.
The default value of -1 disables this feature so that no messages are forwarded to other distributed queue members.
MBean Attribute (Does not apply to application modules):
DistributedQueueBean.ForwardDelaySecure value:
-1Reset Delivery Count On Forward Determines whether or not the delivery count is reset during message forwarding between distributed queue members.
The default value of true resets the delivery counts on messages when they are forwarded to another distributed queue member.
MBean Attribute (Does not apply to application modules):
DistributedQueueBean.ResetDeliveryCountOnForwardUnit-of-Order Routing Gets the "unit-of-order-routing" element.
A WLMessageProducer with Unit of Order will use the "unit-of-order-routing" element rather than the "load-balancing-policy" criteria to select the Distributed Destination Member.
Unit of Order may have been set programmatically with WLProducer, or administratively on the ConnectionFactory or Destination.
- Hash
- producers will compute the Distributed Destination Member from the hash code of the Unit of Order.
- PathService
- the configured Path Service will determine the Distributed Destination Member.
MBean Attribute (Does not apply to application modules):
DistributedDestinationBean.UnitOfOrderRoutingChanges take effect after you redeploy the module or restart the server.
SAF Export Policy The SAF Export Policy controls which applications can send JMS messages to this destination through Store-and-Forward.
- All
- This destination allows everyone to send JMS messages to it through SAF.
- None
- This destination dees not allow anyone to send JMS messages from a remote server to it through SAF.
This attribute is dynamically configurable. A dynamic change of this attribute will affect only messages sent after the update has been made.
MBean Attribute (Does not apply to application modules):
DistributedDestinationBean.SAFExportPolicyChanges take effect after you redeploy the module or restart the server.
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