JMS Message Throttling Using Work Manager

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JMS Message Throttling Using
Work Manager
What is Work Manager?
 A Work Manager defines a set of request classes and thread constraints
that manage work performed by WebLogic Server instances.
 WebLogic Server lets you configure how your application prioritizes the
execution of its work based on rules you define
Work Manager Components
 Fair Share Request Class
 Response Time Request Class
 Min Threads Constraint
 Max Threads Constraint
 Capacity Constraint
 Context Request Class
Configuring Work Manager at Domain Level
 From the weblogic admin-console navigate to Environment-> Work
Managers
Configuring Work Manager at Domain Level
 Create a New Work Manager
Configuring Work Manager at Domain Level
 Once the WM is created navigate to that WM and create a constraint for
instance “Maximun Thread Constraint” and set the desired thread
count.
Using the Work Manager in JMS Proxy Service
 Work Manager created in admin console can be used while configuring
the proxy service as Dispatch policy in JMS Transport Configuration.
Simulation to understand how Work Manager works.
 Navigate to JMS Connection factory which is referred by the JMS proxy
service.
Simulation to understand how Work Manager works.
 Under the Client tab, set the Maximum Messages per
session as “1”.
Simulation to understand how Work Manager
works.
 Porcess Flow:
JMSQueueOSBProxyBusiness ServiceBpel Sync Process
In the simulation, Bpel Process would wait for 5 seconds before the
respective instance completes.
OSB Proxy Service is disabled and 5 messages are put into the queue.
Simulation to understand how Work Manager works.
 After putting the messages into queue the proxy service is
enabled and the messages are processed in the below
pattern.
MSG1
5 Messges
(JMS Queue)
MSG1
Bpel
Process
OSB Proxy
MSG5 in 20th
Second
MSG5 in 20th
Second
Simulation to understand how Work Manager works.
As per the pattern each message will take 5 seconds to get processed
from Queue.
So if the thread constriant has configured as “2”,then for every 5 seconds
2 messages will get processed from the Queue.
Advantages of WM over Message Throttling via proxy
service
 Process/Proxy remains intact.
 While Message throttling using proxy configuration,OSB server uses
internal queue to store the messages, so when a restart of server is
done the corresponding message will be lost.
 Reliabilty.

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