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<== Date ==> <== Thread ==>
Subject: Re: Java API JCA / CAJ DBR_LONG
From: Miroslav Pavleski <[email protected]>
To: [email protected]
Date: Mon, 29 Jan 2018 20:27:51 +0100
Hi

My colleague Matej Sekoranja has the answer:


Native CA:
DBR_LONG types are 32-bit integers, and DBR_INT == DBR_SHORT types are 16-bit.
CA does not handle 64-bit integers (natively). 

In JCA naming is different. I suspect this was done intentionally to avoid confusion since long in Java is 64-bit.

DBR_LONG is renamed to DBR_INT in JCA, and DBR_SHORT == DBR_SHORT.
Note that is just the naming, actual codes (the protocol) is the same.

I find this more confusing.

JCA interfaces are (a bit) outdated. If you are looking for a modern CA Java interface check this out:

Cheers,
Matej



Regards
Miroslav


On 29. 01. 2018 20:02, Ryan Slominski wrote:
It appears the Java API to EPICS does not include DBR_LONG type (missing from source: https://github.com/epics-base/jca/blob/master/src/core/gov/aps/jca/dbr/DBRType.java).  When I use caget and probe on a DBR_LONG PV and compare with programmatic fetch the values don't match and Java reports the type as DBR_INT.   Maybe I'm overlooking something.  Any tips on having Java API return same value as command line tools?


Replies:
Re: Java API JCA / CAJ DBR_LONG J. Lewis Muir
References:
Java API JCA / CAJ DBR_LONG Ryan Slominski
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