2013/4/29 george john <simplyjoe13(a)yahoo.com>:
Hi,
I need some help in building a Java client on Windows 7 64 bit plaftorm to manage a KVM
using the libvirt APIs. Using the instructions at
http://libvirt.org/java.html, i was able
to build libvirt.jar. My understanding is that libvirt.jar uses JNA to call libvirt's
native windows library. I tried using the libvirt dlls in the experimental Windows
installation package mentioned in
http://libvirt.org/windows.html at
http://libvirt.org/sources/win32_experimental/Libvirt-0.8.8-0.exe
but whenever I try to connect to my remote API, I get the below Java exception :
Exception in thread "main" java.lang.UnsatisfiedLinkError: %1 is not a valid
Win32 application.
at com.sun.jna.Native.open(Native Method)
at com.sun.jna.Native.open(Native.java:1718)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:210)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:322)
at com.sun.jna.Library$Handler.<init>(Library.java:142)
at com.sun.jna.Native.loadLibrary(Native.java:387)
at com.sun.jna.Native.loadLibrary(Native.java:366)
at org.libvirt.jna.Libvirt.<clinit>(Unknown Source)
at org.libvirt.Library.<clinit>(Unknown Source)
at org.libvirt.Connect.<init>(Unknown Source)
at Main.main(Main.java:8)
But when I try the same client code on a Windows XP 32 bit machine (with 32 bit JVM), I
don't see this problem and the connection succeeds. So it looks like the problem is
that I am not using 64 bit windows libvirt dlls. Is my assumption correct? Is there a
Windows installer with 64 bit Libvirt dlls ? Or are the 64 bit version of DLLs published
somewhere?
A 64bit process cannot use 32bit DLLs. You'll need libvirt and its
dependencies compiled for 64bit. I'm not aware of any pre-compiled
64bit libvirt DLLs.
I tried using Matthias Bolte's msys_setup script (I tried in 2
machines) and in both machines, I get the below error when I try to run compile_libxml2.sh
as per instructions
https://github.com/photron/msys_setup/blob/master/readme_libvirt.txt
Last few lines before the error is :
>>>>>>>>>>>>>>>>>
make[5]: Leaving directory `/src/libxml2/libxml2-2.9.0-0/python'
make[4]: Leaving directory `/src/libxml2/libxml2-2.9.0-0/python'
Making install in tests
make[4]: Entering directory `/src/libxml2/libxml2-2.9.0-0/python/tests'
make[5]: Entering directory `/src/libxml2/libxml2-2.9.0-0/python/tests'
make[5]: Nothing to be done for `install-exec-am'.
test -z "/share/doc/libxml2-python-2.9.0/examples" || /bin/mkdir -p
"/share/doc/
libxml2-python-2.9.0/examples"
/bin/install -c -m 644 build.py attribs.py tst.py tstxpath.py xpathext.py push.
py pushSAX.py pushSAXhtml.py error.py serialize.py validate.py tstURI.py cutnpas
te.py xpathret.py xpath.py outbuf.py inbuf.py resolver.py regexp.py reader.py re
ader2.py reader3.py reader4.py reader5.py reader6.py reader7.py reader8.py reade
rnext.py walker.py nsdel.py ctxterror.py readererr.py relaxng.py schema.py threa
d2.py sync.py tstLastError.py indexes.py dtdvalid.py tstmem.py '/share/doc/libxm
l2-python-2.9.0/examples'
/bin/install -c -m 644 validDTD.py validSchemas.py validRNG.py compareNodes.py
xpathns.py xpathleak.py tst.xml valid.xml invalid.xml test.dtd '/share/doc/libxm
l2-python-2.9.0/examples'
make[5]: Leaving directory `/src/libxml2/libxml2-2.9.0-0/python/tests'
make[4]: Leaving directory `/src/libxml2/libxml2-2.9.0-0/python/tests'
make[3]: Leaving directory `/src/libxml2/libxml2-2.9.0-0/python'
make[2]: Leaving directory `/src/libxml2/libxml2-2.9.0-0/python'
make[1]: Leaving directory `/src/libxml2/libxml2-2.9.0-0'
+ cp /python/Lib/site-packages/libxml2mod.dll /python/DLLs/libxml2mod.pyd
cp: cannot stat `/python/Lib/site-packages/libxml2mod.dll': No such file or dire
ctory
>>>>>>>>>>>>>>>>>>
I just fixed this problem, but this won't help you with your 64bit
problem. My msys_setup scripts compile libvirt for 32bit and it isn't
that easy to extend them for 64bit. This is mainly due to libvirt's
dependencies. For example, for gnutls the scripts just download
pre-compiled 32bit DLLs. It'll require some work to get libvirt and
its dependencies compiled for 64bit.
--
Matthias Bolte
http://photron.blogspot.com