To provide asynchronous client and component notification, define thread pools and specify the number of threads dedicated to each type of notification.
Select Thread Pools, right-click, and select Add.
In the New Thread Pool dialog box, enter the name of the thread pool.
Click OK.
Reader, writer, and worker threads
To use a thread pool for client notification, set the value
of readers to “3”, writers to “2”,
and workers to “0”. Based on your own performance
measurements, increase the number of reader and writer threads if
it improves throughput. Using thread pools to improve performance
is generally suitable only for high-volume client notification
with transient messages. When message delivery is transactional
or IIOP/SSL via the QOP property, the thread pool’s
reader and writer threads are not used.
To use a thread pool for component notification, set the values of both readers and writers to “0”. Set the value of workers to “1” unless you want to allow parallel message processing, in which case you would increase this value.
Modifying the number of threads in a thread pool
Select Thread Pools.
Select a thread pool from the list, and select File | Properties.
In the Thread Pool Properties dialog box, select the Configuration tab.
To edit the number of threads, click on one of the property values.
Property |
Datatype |
Default value |
Description |
|---|---|---|---|
readers |
long |
0 |
The number of reader threads in the thread pool, which are used for client notification. |
writers |
long |
0 |
The number of writer threads in the thread pool, which are used for client notification. |
workers |
long |
0 |
The number of worker threads in the thread pool, which are used for component notification. |
Modify the property value and click OK.
To enable EAServer to create multiple instances of a message-driven bean (MDB):
Create a thread pool for component notification, and set the workers property to a value greater than 1.
Assign this thread pool to the MDB:
In EAServer Manager, highlight the MDB, and select File | Properties.
On the MDB Type tab, append the name of the thread
pool you just created to the Listener name. For example, if you
created a thread pool called “threads1” and the
Listener Name is MyPkg/MyComp, change the
Listener Name to MyPkg/MyComp[threadsl].
See Chapter 31, “Using the Message Service,” in the EAServer Programmer’s Guide for more information about configuring MDBs.
Select Thread Pools.
Select a thread pool from the list, right-click, and select Delete.
