0. Please prefix emails by topic, eg.[collections] > 1. Has anyone else had a need for a timeout affected priority queue? I haven't had a need for such a class, other may have.
> 3. How do I submit a draft of the classes - do I attach a zip file or paste > into the body of an email? Either a zip attachment, or a link to the zip on another server > 4. Who do I send it to? The link/zip should be to this list. Stephen ----- Original Message ----- From: "Cheung Lo" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, July 30, 2003 9:59 AM Subject: Proposal for a Timeout Affected Priority Queue > Proposal for a Timeout Affected Priority Queue > > Currently available open source queues fall into 2 categories: FIFO/LIFO and > priority-sorted. These are fine, so long as the supply of resources to > process the queue jobs exceed demand over the time period of interest. When > this is true, all the jobs are processed in a timely fashion. > > In my last project however, the above assumption could not be made. The > jobs had an initial priority but during busy periods, the continous > insertion of higher priority jobs implied that lower priority jobs did not > get done. This pattern occured in another previous project as well. In an > insurance office, during periods of low-normal activity, answering customer > calls had higher priority over policy administration. However, admin could > only be delayed for a limited period. If this period timed out, the > priority of policy admin increased so that resources were diverted away from > new customer calls. In other circumstances, jobs that time out may be > binned instead. > > I have implemented a generic solution to a self managing Timeout Affected > Priority (TAP) Queue. There are 3 core classes: TapQueue, TapObject and > TapConsumer. Whenever a consumer pops the next next job, the queue checks > for any priority timeouts and, if necessary, re-prioritizes the queue before > returning the next job. Internally, the TapQueue uses a modified version of > org.apache.commons.collections.BinaryHeap. > > I would like to propose the adoption of the TapQueue into the collections > packages but need feedback on the following issues: > > 1. Has anyone else had a need for a timeout affected priority queue? > 2. If so, what additional requirements did you have that is not already > described? > 3. How do I submit a draft of the classes - do I attach a zip file or paste > into the body of an email? > 4. Who do I send it to? > > Cheung Lo > London, UK > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
