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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: Dynamic Loading and Unloading of EPICS Device Support and Record. |
| From: | Marty Kraimer <[email protected]> |
| Cc: | [email protected] |
| Date: | Thu, 09 Sep 2010 05:56:25 -0400 |
On 09/08/2010 04:09 PM, Ben Franksen wrote:
The following is not for an embeded system but does show a good use for on-line add and delete.On Mittwoch, 8. September 2010, Eric Norum wrote:What's the use case for this, anyhow?Yes, I would be interested in that, too.
Guabao Shen (BNL) is developing a "gather" service. The service uses a javaIOC. The javaIOC has gather records. Each gather record collects data from a set of caV3 records and provides the result to the client as an array.
The javaIOC also has a createGather record. The client supplies a list of channels to the createGather record. When the record processes it creates and installs a new gather record. The gather record can be temporary or permanent. If the record is temporary than after no clients are attached to the record for some fixed period of time the gather record is automatically deleted. If it is permanent it can be deleted by request.
Both on-line add and delete are required in other for this to be a robust service.