Re: Impossible to use multi threading with Tomcat by using a DLL ?
In fact, some of the fonctions of the DLL works except the ones which call the threads. To test my DLL, I have created an applet which call the two DLL and it works very well when I don't use Tomcat. And when I call exactly the same applet with Tomcat, that doesn't work : there is no error but the thread are "blocked". 2008/1/18, david delbecq <[EMAIL PROTECTED]>: > > Tomcat does not "block" multi threading. There is not such thing i think > in the JVM anyway, so i don't see how it could prevent your native code > from creating threads. When you say you are having same call without > tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe > you are just misuing your system library? Or not calling it at all? > There is not restriction in JNI that rpevent multiple thread to call > native code, nor is it restriction as to what thread natvie code create. > It can even create java threads as far a i know! > > Claire Dugenet a écrit : > > Hello, > > > > > > > > I realize a web application using Struts with Tomcat. In this > application, I > > call a DLL (created with JNI) which call an other DLL (in language C). > The > > last one is in the directory "system32" of windows et it use several > > threads. > > > > > > > > There is no error but according to the log files, no thread are called. > I > > have call the same DLLs without Tomcat, and it works. > > > > > > Does Tomcat block the multi-threading ? Is there a solution to authorize > the > > multi-threading ? > > > > Thanks, > > Claire. > > > > > > > - > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
Re: Impossible to use multi threading with Tomcat by using a DLL ?
Tomcat does not "block" multi threading. There is not such thing i think in the JVM anyway, so i don't see how it could prevent your native code from creating threads. When you say you are having same call without tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe you are just misuing your system library? Or not calling it at all? There is not restriction in JNI that rpevent multiple thread to call native code, nor is it restriction as to what thread natvie code create. It can even create java threads as far a i know! Claire Dugenet a écrit : Hello, I realize a web application using Struts with Tomcat. In this application, I call a DLL (created with JNI) which call an other DLL (in language C). The last one is in the directory "system32" of windows et it use several threads. There is no error but according to the log files, no thread are called. I have call the same DLLs without Tomcat, and it works. Does Tomcat block the multi-threading ? Is there a solution to authorize the multi-threading ? Thanks, Claire. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Impossible to use multi threading with Tomcat by using a DLL ?
If your applet code is called from button actions, all calsl to your dll will be made from the same "AWT" thread. If you call it from a servlet in tomcat , a random thread from the HttpThread pool will be used, that's probably your difference that make it work one side and not the other. Claire Dugenet a écrit : In fact, some of the fonctions of the DLL works except the ones which call the threads. To test my DLL, I have created an applet which call the two DLL and it works very well when I don't use Tomcat. And when I call exactly the same applet with Tomcat, that doesn't work : there is no error but the thread are "blocked". 2008/1/18, david delbecq <[EMAIL PROTECTED]>: Tomcat does not "block" multi threading. There is not such thing i think in the JVM anyway, so i don't see how it could prevent your native code from creating threads. When you say you are having same call without tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe you are just misuing your system library? Or not calling it at all? There is not restriction in JNI that rpevent multiple thread to call native code, nor is it restriction as to what thread natvie code create. It can even create java threads as far a i know! Claire Dugenet a écrit : Hello, I realize a web application using Struts with Tomcat. In this application, I call a DLL (created with JNI) which call an other DLL (in language C). The last one is in the directory "system32" of windows et it use several threads. There is no error but according to the log files, no thread are called. I have call the same DLLs without Tomcat, and it works. Does Tomcat block the multi-threading ? Is there a solution to authorize the multi-threading ? Thanks, Claire. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Impossible to use multi threading with Tomcat by using a DLL ?
Hello, In the two case (with or without Tomcat), we call it with a button because we use the same applet. Normally, the applet is independant of Tomcat but it makes a difference when we use this applet with Tomcat (http://localhost:8080 ...) or whithout Tomcat (file:///C:/ ...). We have try to call the DLL with and without the servlet, and it's the same result : it doesn't work when we use Tomcat. david delbecq a écrit : If your applet code is called from button actions, all calsl to your dll will be made from the same "AWT" thread. If you call it from a servlet in tomcat , a random thread from the HttpThread pool will be used, that's probably your difference that make it work one side and not the other. Claire Dugenet a écrit : In fact, some of the fonctions of the DLL works except the ones which call the threads. To test my DLL, I have created an applet which call the two DLL and it works very well when I don't use Tomcat. And when I call exactly the same applet with Tomcat, that doesn't work : there is no error but the thread are "blocked". 2008/1/18, david delbecq <[EMAIL PROTECTED]>: Tomcat does not "block" multi threading. There is not such thing i think in the JVM anyway, so i don't see how it could prevent your native code from creating threads. When you say you are having same call without tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe you are just misuing your system library? Or not calling it at all? There is not restriction in JNI that rpevent multiple thread to call native code, nor is it restriction as to what thread natvie code create. It can even create java threads as far a i know! Claire Dugenet a écrit : Hello, I realize a web application using Struts with Tomcat. In this application, I call a DLL (created with JNI) which call an other DLL (in language C). The last one is in the directory "system32" of windows et it use several threads. There is no error but according to the log files, no thread are called. I have call the same DLLs without Tomcat, and it works. Does Tomcat block the multi-threading ? Is there a solution to authorize the multi-threading ? Thanks, Claire. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Impossible to use multi threading with Tomcat by using a DLL ?
You mean in all cases it runs client-side? Then it's not a tomcat related problem. Applet, to be able to run JNI, must be properly signed and run with security authorisation needed. Moreover, the JNI libraries must be installed on client. Claire Dugenet a écrit : Hello, In the two case (with or without Tomcat), we call it with a button because we use the same applet. Normally, the applet is independant of Tomcat but it makes a difference when we use this applet with Tomcat (http://localhost:8080 ...) or whithout Tomcat (file:///C:/ ...). We have try to call the DLL with and without the servlet, and it's the same result : it doesn't work when we use Tomcat. david delbecq a écrit : If your applet code is called from button actions, all calsl to your dll will be made from the same "AWT" thread. If you call it from a servlet in tomcat , a random thread from the HttpThread pool will be used, that's probably your difference that make it work one side and not the other. Claire Dugenet a écrit : In fact, some of the fonctions of the DLL works except the ones which call the threads. To test my DLL, I have created an applet which call the two DLL and it works very well when I don't use Tomcat. And when I call exactly the same applet with Tomcat, that doesn't work : there is no error but the thread are "blocked". 2008/1/18, david delbecq <[EMAIL PROTECTED]>: Tomcat does not "block" multi threading. There is not such thing i think in the JVM anyway, so i don't see how it could prevent your native code from creating threads. When you say you are having same call without tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe you are just misuing your system library? Or not calling it at all? There is not restriction in JNI that rpevent multiple thread to call native code, nor is it restriction as to what thread natvie code create. It can even create java threads as far a i know! Claire Dugenet a écrit : Hello, I realize a web application using Struts with Tomcat. In this application, I call a DLL (created with JNI) which call an other DLL (in language C). The last one is in the directory "system32" of windows et it use several threads. There is no error but according to the log files, no thread are called. I have call the same DLLs without Tomcat, and it works. Does Tomcat block the multi-threading ? Is there a solution to authorize the multi-threading ? Thanks, Claire. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Impossible to use multi threading with Tomcat by using a DLL ?
We have signed the applet properly but it changes nothing. The first DLL, created with JNI, works well. Because : there are several fonctions in the second DLL (this one in language C). The first function (which doesn't use threads) works well but when we call the second function (which uses multi thread), it doesn't work : the function is "block" where there is the call of the thread. In fact, the servor and the client are on the same machine. david delbecq a écrit : You mean in all cases it runs client-side? Then it's not a tomcat related problem. Applet, to be able to run JNI, must be properly signed and run with security authorisation needed. Moreover, the JNI libraries must be installed on client. Claire Dugenet a écrit : Hello, In the two case (with or without Tomcat), we call it with a button because we use the same applet. Normally, the applet is independant of Tomcat but it makes a difference when we use this applet with Tomcat (http://localhost:8080 ...) or whithout Tomcat (file:///C:/ ...). We have try to call the DLL with and without the servlet, and it's the same result : it doesn't work when we use Tomcat. david delbecq a écrit : If your applet code is called from button actions, all calsl to your dll will be made from the same "AWT" thread. If you call it from a servlet in tomcat , a random thread from the HttpThread pool will be used, that's probably your difference that make it work one side and not the other. Claire Dugenet a écrit : In fact, some of the fonctions of the DLL works except the ones which call the threads. To test my DLL, I have created an applet which call the two DLL and it works very well when I don't use Tomcat. And when I call exactly the same applet with Tomcat, that doesn't work : there is no error but the thread are "blocked". 2008/1/18, david delbecq <[EMAIL PROTECTED]>: Tomcat does not "block" multi threading. There is not such thing i think in the JVM anyway, so i don't see how it could prevent your native code from creating threads. When you say you are having same call without tomcat, you mean in a spearate jvm, using the same jni libraries? Maybe you are just misuing your system library? Or not calling it at all? There is not restriction in JNI that rpevent multiple thread to call native code, nor is it restriction as to what thread natvie code create. It can even create java threads as far a i know! Claire Dugenet a écrit : Hello, I realize a web application using Struts with Tomcat. In this application, I call a DLL (created with JNI) which call an other DLL (in language C). The last one is in the directory "system32" of windows et it use several threads. There is no error but according to the log files, no thread are called. I have call the same DLLs without Tomcat, and it works. Does Tomcat block the multi-threading ? Is there a solution to authorize the multi-threading ? Thanks, Claire. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Impossible to use multi threading with Tomcat by using a DLL ?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Claire, Claire Dugenet wrote: | The first DLL, created with JNI, works well. Because : there are several | fonctions in the second DLL (this one in language C). I would imagine that they are both written in C, yes? | The first function | (which doesn't use threads) works well but when we call the second | function (which uses multi thread), it doesn't work : the function is | "block" where there is the call of the thread. When you say "blocked", what do you mean? Is the code waiting on a mutex or something? Are you using the standard win32 threading functions? Does your code produce any debugging output? What are you able to observe besides "it doesn't work"? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.8 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkeUsxcACgkQ9CaO5/Lv0PBXfQCgpf+I50StRtqCpwQkleDmCQ29 bPEAn21uLLYlJ6qHqDcNWWl7Eu025H7Q =MhJD -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
