Re: Linux JNI ClassLoad
Hello, I use the SleepyCat dbxml which is also JNI and I have to do the following: export JAVA_OPTS='-Djava.library.path=/path/to/folder/with/so' then... sh catalina.sh .run I'd wager that you would have to do the same.. Richard Shannon Scott wrote: Greetings, I have been trying to use some Native C code in one of my applications. I have it working, but after it runs once it fails. The release-notes mention that: To avoid this problem, place classes that load native libraries outside of the web application, and ensure that the loadLibrary() call is executed only once during the lifetime of a particular JVM. From here: http://tomcat.apache.org/tomcat-5.0-doc/class-loader-howto.html I read: For classes and resources that must be shared across all web applications, place unpacked classes and resources under $CATALINA_BASE/shared/classes, or place JAR files containing those classes and resources under $CATALINA_BASE/shared/lib. When I place class files into my $CATALINA_BASE/shared/classes, I get the 'NoClassDefFoundError' error. I have also tried a package in $CATALINA_BASE/shared/lib. Has anyone successfully resolved this issue on the Linux platform? Where is the config that tells tomcat to load classes from $CATALINA_BASE/shared/classes? It seems like mine is not configured correctly because they don't seem to get loaded. Any pointers or advice is greatly appreciated. Take care. S - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Linux JNI ClassLoad
I think that this can be done with the environment variable LD_LIBRARY_PATH which will point to your C object file. This is an uneducated guess, but worth a try. Mike Shannon Scott wrote: Greetings, I have been trying to use some Native C code in one of my applications. I have it working, but after it runs once it fails. The release-notes mention that: To avoid this problem, place classes that load native libraries outside of the web application, and ensure that the loadLibrary() call is executed only once during the lifetime of a particular JVM. From here: http://tomcat.apache.org/tomcat-5.0-doc/class-loader-howto.html I read: For classes and resources that must be shared across all web applications, place unpacked classes and resources under $CATALINA_BASE/shared/classes, or place JAR files containing those classes and resources under $CATALINA_BASE/shared/lib. When I place class files into my $CATALINA_BASE/shared/classes, I get the 'NoClassDefFoundError' error. I have also tried a package in $CATALINA_BASE/shared/lib. Has anyone successfully resolved this issue on the Linux platform? Where is the config that tells tomcat to load classes from $CATALINA_BASE/shared/classes? It seems like mine is not configured correctly because they don't seem to get loaded. Any pointers or advice is greatly appreciated. Take care. S - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Mike Sabroff Web Services Developer [EMAIL PROTECTED] 920-568-8379 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Linux JNI ClassLoad
Mike, Thank you for your response. I have tried to place my shared object files into /usr/local/lib which is in the LD_LIBRARY_PATH environment variable for my tomcat config. When I place my class files in $CATALINA_BASE/common/classes, the function works correctly ( library is found ), but only once ( because the Native code cannot be loaded more than once in the JVM, I suppose ). When I place my class files in $CATALINA_BASE/shared/classes, which is what the docs explain is appropriate for resolving this issue, the class cannot be found. Is anyone else having trouble loading classes from $CATALINA_BASE/shared/classes? Thanks again. Shannon -Original Message- From: Mike Sabroff [mailto:[EMAIL PROTECTED] Sent: Friday, March 03, 2006 11:29 AM To: Tomcat Users List Subject: Re: Linux JNI ClassLoad I think that this can be done with the environment variable LD_LIBRARY_PATH which will point to your C object file. This is an uneducated guess, but worth a try. Mike Shannon Scott wrote: Greetings, I have been trying to use some Native C code in one of my applications. I have it working, but after it runs once it fails. The release-notes mention that: To avoid this problem, place classes that load native libraries outside of the web application, and ensure that the loadLibrary() call is executed only once during the lifetime of a particular JVM. From here: http://tomcat.apache.org/tomcat-5.0-doc/class-loader-howto.html I read: For classes and resources that must be shared across all web applications, place unpacked classes and resources under $CATALINA_BASE/shared/classes, or place JAR files containing those classes and resources under $CATALINA_BASE/shared/lib. When I place class files into my $CATALINA_BASE/shared/classes, I get the 'NoClassDefFoundError' error. I have also tried a package in $CATALINA_BASE/shared/lib. Has anyone successfully resolved this issue on the Linux platform? Where is the config that tells tomcat to load classes from $CATALINA_BASE/shared/classes? It seems like mine is not configured correctly because they don't seem to get loaded. Any pointers or advice is greatly appreciated. Take care. S - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Mike Sabroff Web Services Developer [EMAIL PROTECTED] 920-568-8379 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
