I´ve call a native method without any parameters and it keep on failing... Is there any 'rule' to put my JAVA classes and libraries in the Jakarta directory tree?? I have my servlet class under $CATALINA_HOME/webapps/myapplication/WEB-INF/classes/myservlet.class and several classes in 2 packages under $CATALINA_HOME/webapps/myapplication/WEB-INF/classes/mypackage1 and $CATALINA_HOME/webapps/myapplication/WEB-INF/classes/mypackage2. Libreria.java is under mypackage1, so I´ve also try to change the .h header to:
JNIEXPORT void JNICALL Java_mypackage1_Libreria_JAdd.... and again the same.... Thanks for your help -----Mensaje original----- De: Manish Bhatnagar [mailto:[EMAIL PROTECTED]] Enviado el: viernes, 15 de febrero de 2002 11:55 Para: Tomcat Users List Asunto: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD That seems to be ok. Are you sure you can pass "null" as a parameter? I don't see any other reason. Everything seems to be fine. -----Original Message----- From: Mario Fernandez [mailto:[EMAIL PROTECTED]] Sent: Friday, February 15, 2002 4:22 PM To: 'Tomcat Users List' Subject: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD It fails again... May the way I compile the C file be the error cause?? I compile it like this: # gcc -Wall -c mylib.c -I/usr/local/jdk1.2.2/include -I/usr/local/jdk1.2.2/include/freebsd # ld -shared -fPIC -o libmylib.so mylib.o -----Mensaje original----- De: Manish Bhatnagar [mailto:[EMAIL PROTECTED]] Enviado el: viernes, 15 de febrero de 2002 11:33 Para: Tomcat Users List Asunto: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD Okay... do this: replace #include <jni.h> with "#include "jni.h". Does it work? -----Original Message----- From: Mario Fernandez [mailto:[EMAIL PROTECTED]] Sent: Friday, February 15, 2002 4:05 PM To: '[EMAIL PROTECTED]' Subject: RV: Problem with JNI, Tomcat 4.0.1 and FreeBSD I´ve tried with a function that only makes a return(); and it keeps on crashing... I think the failure is not in JNI code, because it works with Apache + Jserv, so that´s why I´m getting mad about this failure. The .h file is like this: /* DO NOT EDIT THIS FILE - it is machine generated */ #include <jni.h> /* Header for class Libreria */ #ifndef _Included_Libreria #define _Included_Libreria #ifdef __cplusplus extern "C" { #endif /* * Class: Libreria * Method: JAdd * Signature: (Lipfw/Regla;)V */ JNIEXPORT void JNICALL Java_Libreria_JAdd (JNIEnv *, jobject, jobject); /* * Class: Libreria * Method: JInterfaces * Signature: ()Ljava/util/Vector; */ JNIEXPORT jobject JNICALL Java_Libreria_JInterfaces (JNIEnv *, jobject); /* * Class: Libreria * Method: JListar * Signature: ([Ljava/lang/String;I)Ljava/util/Vector; */ JNIEXPORT jobject JNICALL Java_Libreria_JListar (JNIEnv *, jobject, jobjectArray, jint); /* * Class: Libreria * Method: JResolver * Signature: (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String; */ JNIEXPORT jstring JNICALL Java_Libreria_JResolver (JNIEnv *, jobject, jstring, jstring); #ifdef __cplusplus } #endif #endif -----Mensaje original----- De: Manish Bhatnagar [mailto:[EMAIL PROTECTED]] Enviado el: Friday, February 15, 2002 10:58 AM Para: Tomcat Users List Asunto: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD I guess that is the message displayed when JNI performs some illegal operation. I suggest you to check your JNI code. The best thing would be to put *AfxMessageBox*es at different places. One more thing... have you generated the .h file? -mb- -----Original Message----- From: Mario Fernandez [mailto:[EMAIL PROTECTED]] Sent: Friday, February 15, 2002 3:33 PM To: 'Tomcat Users List' Subject: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD Not exactly... the browser get stuck for some minutes, as if it was trying to access the library methods; but when it finish, the error is: The page cannot be displayed. I think this is because Tomcat is crashing, but I don´t know why. -----Mensaje original----- De: Manish Bhatnagar [mailto:[EMAIL PROTECTED]] Enviado el: Friday, February 15, 2002 10:45 AM Para: Tomcat Users List Asunto: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD We have NOT made any changes to jni wrokers. What is the error that is being displayed? Is it 500 Internal Server Error? -----Original Message----- From: Mario Fernandez [mailto:[EMAIL PROTECTED]] Sent: Friday, February 15, 2002 2:02 PM To: 'Tomcat Users List' Subject: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD I´ve my library there, in $CATALINA_HOME\lib, and there´s mo way to make it works... The System.loadLibrary() call works fine, but the problem is when I call some native method. I´ve reading some responses in the mailing list talking about jni workers or something like this, but always with Tomcat 3.2.3. In Tomcat 4.0.1, should I do something special in any configuration file?? -----Mensaje original----- De: Manish Bhatnagar [mailto:[EMAIL PROTECTED]] Enviado el: Friday, February 15, 2002 5:29 AM Para: Tomcat Users List Asunto: RE: Problem with JNI, Tomcat 4.0.1 and FreeBSD Where are you putting your mylib.so library? It should be in $CATALINA_HOME\lib. -----Original Message----- From: Mario Fernandez [mailto:[EMAIL PROTECTED]] Sent: Friday, February 15, 2002 1:40 AM To: [EMAIL PROTECTED] Subject: Problem with JNI, Tomcat 4.0.1 and FreeBSD > Hi everybody, > > I´ve got an annoying error working with JNI and Tomcat 4.0.1 in a FreeBSD > machine. I call a native method from a servlet and it doesn´t work. I get > a core dumped... What do I have to do to make it works in Tomcat 4.0.1??? > My classes an native code are below: > Is it necessary to do something in Tomcat to work with JNI?? > > From the servlet i make the following call: > > .... > > Library.list(null, 0); > > .... > > My class Library is like this: > > public class Library{ > > static { > > System.loadLibrary("mylib"); // The sahred library is called libmylib.so > and this works fine > } > > public native static void list(String name, int num); > > } > > > The function header in Library.h (generated by javah -jni Library) is: > > JNIEXPORT void JNICALL_Library_list(JNIEnv *,jobject,jobject,jint); > > And I use this header in mylib.c > > Thanks in advance > >
