Hi Peter.
>>But then you have to open it on every access and must synchronize the
>>write-access on it, or use a background-process that manages it...
>
> Yup that's the main issue here - you cannot have different instances
> open in different processes
>
> Also I fear the it would be inefficient
> you would have to
> a) get a lock
> b) open the persistent object
> c) Move to the end
> d) append data
> e) save (transfer from ^CacheTemp to the persistent location)
> f) remove the lock
>:{
>
> Also there may be issues with having a background process doing the
> work cos the in-memory copy of the stream temporarly saves data to
> ^CacheTemp (by default) so the saved version might not be the current
> version
>
> That's why I suggested a simpler method
>
> So the key question is why do you need a stream???
that's the question!
Maybe its easier to write to a global:
ClassMethod WriteToUniqueStream(data As %String)
{
s ^CacheTemp("UNIQUESTREAM",$i(^CacheTemp("UNIQUESTREAM"))=data
// $i is important!
}
ClassMethod GetUniqueStream() as %BinaryStream
{
s result=##class(%BinaryStream).%New()
s key=""
f {
s key = $o(^CacheTemp("UNIQUESTREAM",key))
q:key=""
d result.Write(^CacheTemp("UNIQUESTREAM",key))
}
q result
}
^Florian
