Dave Husson wrote:
This did not work for me. After rereading my terse plea for help, I'm
sure that I did not explain my problem well enough. It was late.
The problem is on the read side. I have a C++ process that reads a
data from a serial port and writes it to a netcdf file. New data
arrives and is processed approximately once a second. I have a java
process that needs to read the most recent entry (last) entry in the
netcdf file and push the data to an applet that is displaying a graph
in "real-time". I do a variable.getSize() to determine the number of
items in the file. Once the file is open, I always get the same value
returned from getSize().
In C/C++, I do the same operations, but prior to the getSize(), I do
an nc_sync() of the file. When I do the getSize(), I see the file
growing, as I expected.
I modified my java code to use NetcdfFileWriteable instead of
NetcdfFile and called flush() on the file in the equivalent place to
where I was doing the nc_sync(). This gave me the same result as
before. I always get the size of the file at the time it is opened
and never see the file growing.
Thanks for the help.
Dave
caron@xxxxxxxxxxxxxxxx wrote:
hmm, yes i think i understand your problem now. it appears to be a
limitation in the underlying i/o reading layer. i will investigate if
theres an easy way to do it. for now, the only workaround i know is to
reopen the file.
BTW, are you using netcdf java 2.0 or 2.1?
The NetcdfFileWriteable class is for writing files, so you can forget
about using it for this case.
