mmap is supported by the JDK, jna is not required. On Fri, Sep 23, 2011 at 5:07 AM, Viktor Jevdokimov < viktor.jevdoki...@adform.com> wrote:
> I found that there‘s no C library under Windows, and msvcrt does not > provide mlockall function, so currently there‘s no way to use JNA under > Windows. That way mmap is not a good idea?**** > > ** ** > > ** ** > ** > > ** ** > > Best regards/ Pagarbiai**** > > ** ** > > *Viktor Jevdokimov* > > Senior Developer**** > > ** ** > > Email: viktor.jevdoki...@adform.com**** > > Phone: +370 5 212 3063****. Fax: +370 5 261 0453**** > > J. Jasinskio 16C, LT-01112 Vilnius, Lithuania**** > > ** ** > > ** ** > > [image: Adform news] <http://www.adform.com/> > > [image: Visit us!] > > Follow: > > [image: twitter] <http://twitter.com/#%21/adforminsider> > > Visit our blog <http://www.adform.com/site/blog> > > Disclaimer: The information contained in this message and attachments is > intended solely for the attention and use of the named addressee and may be > confidential. If you are not the intended recipient, you are reminded that > the information remains the property of the sender. You must not use, > disclose, distribute, copy, print or rely on this e-mail. If you have > received this message in error, please contact the sender immediately and > irrevocably delete this message and any copies.**** > > *From:* Viktor Jevdokimov [mailto:vjevdoki...@gmail.com] > *Sent:* Thursday, September 22, 2011 15:01 > *To:* user@cassandra.apache.org > *Subject:* How to enable JNA for Cassandra on Windows?**** > > ** ** > > Hi,**** > > ** ** > > I'm trying without success to enable JNA for Cassandra on Windows.**** > > ** ** > > Tried to place JNA 3.3.0 libs jna.jar and platform.jar into Cassandra 0.8.6 > lib dir, but getting in log:**** > > Unable to link C library. Native methods will be disabled.**** > > ** ** > > What is missed or what is wrong?**** > > ** ** > > One thing I've found on inet about JNA and Windows is this sample:**** > > ** ** > > // Library is c for unix and msvcrt for windows > > String libName = "c"; > if (System.getProperty("os.name").contains("Windows")) > { > libName = "msvcrt"; > > **** > > } > > **** > > // Loading dynamically the library > CInterface demo = (CInterface) Native.loadLibrary(libName, CInterface.class); > **** > > ** ** > > from http://www.scriptol.com/programming/jna.php**** > > ** ** > > while in Cassandra:**** > > ** ** > > try**** > > {**** > > Native.register("c");**** > > }**** > > catch (NoClassDefFoundError e)**** > > {**** > > logger.info("JNA not found. Native methods will be disabled.");**** > > }**** > > catch (UnsatisfiedLinkError e)**** > > {**** > > logger.info("Unable to link C library. Native methods will be > disabled.");**** > > }**** > > catch (NoSuchMethodError e)**** > > {**** > > logger.warn("Obsolete version of JNA present; unable to register C > library. Upgrade to JNA 3.2.7 or later");**** > > }**** > > ** ** > > Is it true that for Windows Cassandra should do something like:**** > > ** ** > > if (System.getProperty("os.name").contains("Windows")) > > { > Native.register("msvcrt"); > }**** > > else**** > > {**** > > Native.register("c"); > }**** > > ** ** > > ** ** > > Thanks**** > > Viktor**** > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
<<dm-exco6cf8.png>>
<<signature-logo3d60.png>>
<<tweet5595.png>>
