Runtime components : Service components : Generic Pool : How the Generic Pool works
  
How the Generic Pool works
The Generic Pool works in the following way:
1 An application operation requests an object (an instance of a service) from the pool.
2 The Generic Pool checks to see if a free object exists inside the vector.
If a free object exists, it passes the object to the application.
If no free object exists, it creates an instance of the object and passes it to the application.
If no free object exists, and the pool is not designed for automatic growth, it waits for the number of milliseconds specified in timeBetweenRetries and then tries again to get a free object. If it is unsuccessful, it returns null.
3 If it was successful in receiving the object, the application operation uses the object and then releases it back to the pool so that it is available for other operations.
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Generic Pool