Hi Vikram,
> I used Nc4Iosp.SetLibraryAndPath() to specify a location that does not
> exist, but there was no error message or failure.
Nc4Iosp.setLibraryAndPath() doesn't actually attempt to load libnetcdf, which
is why you aren't seeing an error. Instead try something like:
Nc4Iosp.setLibraryAndPath("/Users/cwardgar/Desktop/foo", "netcdf");
System.out.printf("libnetcdf is present = %s%n",
Nc4Iosp.isClibraryPresent());
When I've given the wrong path I get:
Jul 27, 2016 4:26:49 PM ucar.nc2.jni.netcdf.Nc4Iosp load
WARNING: Nc4Iosp: NetCDF-4 C library not present
(jna_path='/Users/cwardgar/Desktop/foo', libname='netcdf').
java.lang.UnsatisfiedLinkError: Unable to load library 'netcdf': Native
library (darwin/libnetcdf.dylib) not found in resource path ([...])
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:271)
...
Note that you'll need an SLF4J logger [1] on the classpath to see that message.
>Is there a path it defaults to looking for the library in?
The shared library loader on your system has a default search path [2], but
NetCDF-Java doesn't (anymore). For example, if your binaries are in
/usr/local/lib, they'll almost certainly be found without any extra effort from
you.
> Also, I was wondering if the netcdf-Java classes relevant to netcdf-4 IO
> could be repackaged in a smaller jar file?
Do you use Maven or Gradle? If so, you only need to include the "netcdf4"
module [3]. Then, all of its transitive dependencies will be pulled in
automatically.
Or maybe you want a fat jar like netcdfAll.jar that includes everything
necessary to work with NetCDF-4, and nothing else? If so, that's not an
artifact we normally publish. I could easily build one for you if you want, but
it's be a one-off.
Cheers,
Christian
[1]
http://www.unidata.ucar.edu/software/thredds/current/netcdf-java/reference/BuildDependencies.html#_logging
[2]
http://www.unidata.ucar.edu/software/thredds/current/netcdf-java/reference/netcdf4Clibrary.html#loading
[3]
http://www.unidata.ucar.edu/software/thredds/current/netcdf-java/reference/netcdf4Clibrary.html
Ticket Details
===================
Ticket ID: MDA-777673
Department: Support netCDF Java
Priority: Normal
Status: Closed
===================
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