Is there a name for this design pattern?

Question

There's a specific snippet of code that I often use for recycling objects in a list based on a data provider. I thought of making a class to run through the snippet, using a given class to handle each step. This problem is... I don't know what to name it. Does a design pattern exist that describes this reusing of snippets?

package
{
    public class RecycleOperationRunner implements IRecycleOperationRunner
    {
        public function RecycleOperationRunner()
        {

        }

        public function run(operation:IRecycleOperation):void
        {
            const m:int = Math.max(numObjects, numDataItems);

            for (var i:int = 0; i < m; i++)
            {
                if (i < numDataItems)
                {
                    if (i < numObjects)
                    {
                        operation.reuseItem(i);
                    }
                    else
                    {
                        operation.createItem(i);
                    }

                    operation.setupItem(i);
                }
                else
                {
                    operation.removeItem(i);
                }
            }

            operation.dispose();
        }
    }
}

Mark Peters · Answer 1 · 2011-01-21T22:09:14.180

4

It seems like what you have could be described as a "pool". As in "thread pool" or "connection pool."

It seems to deviate slightly in that typically you request a resource from a pool, and if all the resources are currently being used (leased) then you block until one becomes available. In your example, you create one. So you have a pool that automatically grows in size to be non-blocking.

edited Jan 21 '11 at 22:09

answered Jan 21 '11 at 22:03

Mark Peters

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Or in general, a *resource pool*. – Péter Török Jan 21 '11 at 22:04
@Peter: Thanks, I added a more general Wikipedia article. One for exactly "resource pool" doesn't exist but that is a good generic name. – Mark Peters Jan 21 '11 at 22:06
The pooling aspect is just an example of the concept. I think this is similar to the Command Pattern, but with configurable callbacks. – destroytoday Jan 21 '11 at 23:14

score 0 · Answer 2 · edited May 23 '17 at 11:43

0

Here Martin Fowler describes a Pooling pattern and methods to the situation when all resources are in use and client requests a new one: http://martinfowler.com/bliki/ResourcePool.html

Also see this discussion on implementation: C# Object Pooling Pattern implementation

edited May 23 '17 at 11:43

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answered Sep 21 '12 at 11:26

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Is there a name for this design pattern?

2 Answers2