| Class | Description | 
|---|---|
| PoolableThread | 
 An extension of Thread, PoolableThread instances know how to stay alive and wait in a pool 
 | 
| ResourcePool | 
 A generic abstract class to handle a finite set of resources 
 | 
| ThreadPool | 
 A resource pool to handle a pool of threads 
 | 
| Exception | Description | 
|---|---|
| ResourceUnavailableException | 
 Exception to indicate that there are no available resources that became available during the
 specified wait time. 
 | 
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