[POOL-7] [pool] GenericObjectPool is a LIFO, not a FIFO implementation

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2
• Fix Version/s: 1.3

Environment

Operating System: All
Platform: All

• Bugzilla Id: 33264
• Assignee: Unassigned
• Reporter: Thomas Schürger
• Created: 27/Jan/05 16:48
• Updated: 14/Jul/06 11:16
• Resolved: 18/May/06 02:45

Description

Hi,

the GenericObjectPool implementation is (like the StackedObjectPool) a LIFO, not
a FIFO implementation as stated here:
http://jakarta.apache.org/commons/pool/guide/index.html).

When borrowObject() is called, the first available object is extracted from the
pool using removeFirst(). When returnObject(obj) is called, the object is
returned to the pool using addFirst(). I would expect that addLast() is used if
this is supposed to be a FIFO implementation.

But perhaps the developers guide is wrong, not the implementation.