Thread in the Linux's JVM
Title: Thread in the Linux's JVM Hi, In the JavaWord article called "programming Java threads in the real world, Part 1( http://www.javaworld.com/jw-09-1998/jw-09-threads.html)", the author sad that "Java's promise of platform independence falls flat on its face in the threads arena". If you read this paper you will can see two plataform example : NT and Solaris. Major question is what scheduling is implemented by the Linux JVM and the Linux OS. Does it use a nonpreemptive our preemptive scheduler ? The other important question is about what thread's architecture is implement by Linux O.S. I am asking it because in the sun's paper "Multithreading: General And Java-Specific Information (http://www.sun.com/solaris/java/wp-java/4.html;$sessionid$5CBVN2YAAI4VTAMW0JZE3NUBS1JHEUDO)" sad : "Understanding the architectural advantages of one native MT environment/architecture over another is critical to an understanding of the advantages of one Java implementation over another. Since a typical JVM runtime is implemented on top of the traditional platform, a richer, architecturally superior MT platform will obviously translate to a superior Java MT environment for Java applications on that platform. The native OS threads model greatly influences Java application performance." Thanks
Thread in the Linux's JVM
Title: Thread in the Linux's JVM Hi, In the JavaWord article called "programming Java threads in the real world, Part 1( http://www.javaworld.com/jw-09-1998/jw-09-threads.html)", the author sad that "Java's promise of platform independence falls flat on its face in the threads arena". If you read this paper you will can see two plataform example : NT and Solaris. Major question is what scheduling is implemented by the Linux JVM and the Linux OS. Does it use a collaborative our preemptive scheduler ? The other important question is about what thread's architecture is implement by Linux O.S. I am asking it because in the sun's paper "Multithreading: General And Java-Specific Information (http://www.sun.com/solaris/java/wp-java/4.html;$sessionid$5CBVN2YAAI4VTAMW0JZE3NUBS1JHEUDO)" sad : "Understanding the architectural advantages of one native MT environment/architecture over another is critical to an understanding of the advantages of one Java implementation over another. Since a typical JVM runtime is implemented on top of the traditional platform, a richer, architecturally superior MT platform will obviously translate to a superior Java MT environment for Java applications on that platform. The native OS threads model greatly influences Java application performance." Thanks
Re: Version for GlibC
> How do you find what glibc2.x version you have? As you mentioned, look at your SuSE distribution ;) > > I couldn't answer it satisfactorily when asked me this morning. > ( I haven't downloaded JDK pre 1.2 release yet, because 1.1.7v1a > works perfectly fin on SuSE Linux 6.1 which I assume is glibc2.0 anyway.) Yes: 6.0 is (still) libc5, 6.1 is glibc2.0 and 6.2 is based on glibc2.1, though the old libs are still delivered for backward compatability. This works in most cases, not in all, best example is Oracle 8.15i which needs a patch to work under SuSE 6.2 with glibc 2.1. Oliver ___ Oliver Fels| e-mail: IQena GmbH | [EMAIL PROTECTED] Team Manager JAVA-/IT-Security | http://www.iqena.com Friedrichshafen, Germany | --- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Version for GlibC
[EMAIL PROTECTED] wrote: > > > How do you find what glibc2.x version you have? > As you mentioned, look at your SuSE distribution ;) > > > > > I couldn't answer it satisfactorily when asked me this morning. > > ( I haven't downloaded JDK pre 1.2 release yet, because 1.1.7v1a > > works perfectly fin on SuSE Linux 6.1 which I assume is glibc2.0 anyway.) > > Yes: >6.0 is (still) libc5, >6.1 is glibc2.0 and >6.2 is based on glibc2.1, > though the old libs are still delivered for backward compatability. > This works in most cases, not in all, best example is Oracle 8.15i > which needs a patch to work under SuSE 6.2 with glibc 2.1. > > Oliver This is quite confusing because there is no way or knowing for sure. You can't type a command or do on `/bin/ls -l /usr/lib/libc*'. First thing I did, was get the original 6.1 box from the upstair cupboard, but there is nothing there that says any like glibc2.0. I bet this is massively confusing to new user. Steve better write a little utility to do this for next JDK1.2 release. Oh well... Adios Peter - import std.Disclaimer; // More Java for your Lava, Mate. "Give the man, what he wants. £££" [on Roy Keane, Quality Player] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Visibroker - Java - Linux
Hello, I download the Visibroker for Java 3.4 (linux version) from http://www.inprise.com/downloads/. I'm using Linux RH 5.2 and JDK1.1.7. I follow the instructions for instalation but, when I try some commands, I get: [root@lc bin]# oadj -helpISO-8859-1: unknown locale[root@lc bin]# java2idlISO-8859-1: unknown locale What's happening? Can anybody help me, please? Best regards :-) -Claudio.
Re: Version for GlibC
do rpm -qa | grep glib On Mon, 8 Nov 1999, Peter Pilgrim wrote: > Quick GlibC Question? > > How do you find what glibc2.x version you have? > > I couldn't answer it satisfactorily when asked me this morning. > ( I haven't downloaded JDK pre 1.2 release yet, because 1.1.7v1a > works perfectly fin on SuSE Linux 6.1 which I assume is glibc2.0 anyway.) > > -- > > Adios > Peter > > - > import std.Disclaimer;// More Java for your Lava, Mate. > "Give the man, what he wants. £££" [on Roy Keane, Quality Player] > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Security (was Re: policytool)
Hmm. Well the program that gave me the security exception WAS an RMI program, and one of the exceptions what for not having permissions to resolv/connect to a host, but I also got a security exception when trying to open a file. Nelson Minar wrote: > This list is full of stuff that's not Linux specific. > > >>>applications do not make use of the java.policy file per default in > >>>the Linux 1.2 version. > > RMI is an exception to this rule. Since Java 1.1, RMI has required a > security policy of some sort because it can load remote classes by > default. In Java2, you have to have the right policy file to make RMI > work. See the rmi-users list and RMI documentation for more info. > > [EMAIL PROTECTED] > . . . .. . . . http://www.media.mit.edu/~nelson/ > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Any EJB Server for Linux?
Are there any EJB Server for Linux currently Available. Thanks _ Steve Gee Certified Java Programmer Maxor National Pharmacies Information Technologies [EMAIL PROTECTED] 806.324.5540 www.maxor.com 806.324.5400 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Version for GlibC
> Peter Pilgrim writes: > Quick GlibC Question? > How do you find what glibc2.x version you have? /lib/libc.so - if you get a segmentation fault, it's glibc 2.0.7;-) For example: $ /lib/libc.so.6 GNU C Library stable release version 2.1.2, by Roland McGrath et al. [...] > I couldn't answer it satisfactorily when asked me this morning. > ( I haven't downloaded JDK pre 1.2 release yet, because 1.1.7v1a > works perfectly fin on SuSE Linux 6.1 which I assume is glibc2.0 anyway.) 6.1 comes with 2.0.7 Andreas -- Andreas Jaeger SuSE Labs [EMAIL PROTECTED] private [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
easy question
I apologize that this isn't a specifically Linux-related question. I'm working on a project involving several servlets and other classes, organized in multiple java packages, and I don't think I've figured out the ideal way to structure my directories. This is a web-based application, so in addition to the server-side Java classes, I also have HTML and javascript files to deal with. Thank goodness there are no applets (yet), because that would make it even more confusing! I have the following files: - Java source code files and their associated RCS files - C source code (and RCS) for JNI methods - the development version of the shared libraries for the JNI methods - the production version of the shared libraries for the JNI methods - the development version of the Java class files - the production version of the Java class files - static HTML and JavaScript source files (development version and RCS) - static HTML and JavaScript source files (production version) How does one set up the directory structure for such a project? The class files evidently need to be in a directory hierarchy that mirrors the package hierarchy. I feel that I need the Java source files to be in a similar hierarchy - should it be a parallel tree or should I keep the sources in the same directories as the development versions of their corresponding classes? If I don't keep the .class files in the same directories as their .java files, do I need to "mv" them after compiling or can I convince javac to understand my CLASSPATH and put the .class files in the right place? Thanks in advance, Solomon -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re:Any EJB Server for Linux?
Check out www.orionserver.com. It is not free BTW. EJB server should be 100% java anyway so as long as it run on other platform, it should work in Linux well. Steve Nguyen [EMAIL PROTECTED] C.E.O. KBMail Software & Java Hosting Service Provider http://www.kbmail.com http://www.ebpcs.net "Plan - Do - Review --> Success" Original message From: [EMAIL PROTECTED] Subject: Any EJB Server for Linux? To: [EMAIL PROTECTED] Date: Mon, 08 Nov 1999 16:47:37 GMT -- Are there any EJB Server for Linux currently Available. Thanks _ Steve Gee Certified Java Programmer Maxor National Pharmacies Information Technologies [EMAIL PROTECTED] 806.324.5540 www.maxor.com 806.324.5400 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Any EJB Server for Linux?
All of the EJB servers I have seen are written in Java. So, the answer is yes - all of them. --shawn [EMAIL PROTECTED] wrote: > > Are there any EJB Server for Linux currently Available. > > Thanks > _ > Steve Gee > Certified Java Programmer > Maxor National Pharmacies > Information Technologies > > [EMAIL PROTECTED] > 806.324.5540 > www.maxor.com > 806.324.5400 > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
jdk version
Hi everybody, I have a java-swing application that runs fine with jdk117_v3 but now i need to compile and run under jdk1.2 pre-v2 and it gives runtime Exception under jdk1.2 as follows, Exception occurred during event dispatching: java.lang.IndexOutOfBoundsException: -1 at java.util.BitSet.get(Compiled Code) at javax.swing.DefaultListSelectionModel.clear(Compiled Code) at javax.swing.DefaultListSelectionModel.setState(Compiled Code) at javax.swing.DefaultListSelectionModel.removeIndexInterval(Compiled Code) at javax.swing.plaf.basic.BasicListUI$ListDataHandler.intervalRemoved(Compiled Code) at javax.swing.AbstractListModel.fireIntervalRemoved(Compiled Code) at javax.swing.DefaultComboBoxModel.removeAllElements(Compiled Code) at javax.swing.JComboBox.removeAllItems(Compiled Code) at Fsa.refreshAttrCombo(Compiled Code) at Fsa.addAttributes(Compiled Code) at Fsa.createComponents(Compiled Code) at Question$2.actionPerformed(Compiled Code) at javax.swing.AbstractButton.fireActionPerformed(Compiled Code) at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Compiled Code) at javax.swing.DefaultButtonModel.fireActionPerformed(Compiled Code) at javax.swing.DefaultButtonModel.setPressed(Compiled Code) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Compiled Code) at java.awt.Component.processMouseEvent(Compiled Code) at java.awt.Component.processEvent(Compiled Code) at java.awt.Container.processEvent(Compiled Code) at java.awt.Component.dispatchEventImpl(Compiled Code) at java.awt.Container.dispatchEventImpl(Compiled Code) at java.awt.Component.dispatchEvent(Compiled Code) at java.awt.LightweightDispatcher.retargetMouseEvent(Compiled Code) at java.awt.LightweightDispatcher.processMouseEvent(Compiled Code) at java.awt.LightweightDispatcher.dispatchEvent(Compiled Code) at java.awt.Container.dispatchEventImpl(Compiled Code) at java.awt.Window.dispatchEventImpl(Compiled Code) at java.awt.Component.dispatchEvent(Compiled Code) at java.awt.EventQueue.dispatchEvent(Compiled Code) at java.awt.EventDispatchThread.run(Compiled Code) Can anybody tell.. do i need to do anything special to make it work under jdk1.2 or it's a problem with blackdown jdk version. -Raj -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
code question
hi all, can someone tell me how can I get the system time and date with java? TIA --Yohans ~ Yohans Mendoza Unix Administrator [EMAIL PROTECTED]Sirius Images Inc. http://www2.utep.edu/~yohanshttp://www.sirius-images.net ~ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Thread in the Linux's JVM
Hi, Thank you for bringing up this question. I also have problems with multiple threads in Linux. In my case the behavior of threads with JNI is different from pure Java behavior. I use SwingWorker class. If I don't have JNI methods I don't have to use yield() method. If I replace my Java methods with JNI calls I must use yield(), otherwise the application simply does not work. There is no mentioning of yield() method in any SwingWorker-related documentation. It would be nice to know more about multithreading features of Linux JVM. Jacob Nikom > Evandro Luquini wrote: > > Hi, > In the JavaWord article called "programming Java threads in the real > world, Part 1( > http://www.javaworld.com/jw-09-1998/jw-09-threads.html)", the author > sad that "Java's promise of platform independence falls flat on its > face in the threads arena". If you read this paper you will can see > two plataform example : NT and Solaris. > > Major question is what scheduling is implemented by the Linux JVM and > the Linux OS. Does it use a nonpreemptive our preemptive scheduler ? > > The other important question is about what thread's architecture is > implement by Linux O.S. I am asking it because in the sun's paper > "Multithreading: General And Java-Specific Information > >(http://www.sun.com/solaris/java/wp-java/4.html;$sessionid$5CBVN2YAAI4VTAMW0JZE3NUBS1JHEUDO)" > sad : "Understanding the architectural advantages of one native MT > environment/architecture over another is critical to an understanding > of the advantages of one Java implementation over another. Since a > typical JVM runtime is implemented on top of the traditional platform, > a richer, architecturally superior MT platform will obviously > translate to a superior Java MT environment for Java applications on > that platform. The native OS threads model greatly influences Java > application performance." > > Thanks -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
silly newbie question
pardon me for this silly question, but i have to know. How do i set multiple classpaths? i have jdk1.2pre2 running and want to do some stuff with servlets and jdbc. the jdbc is fine for applets and applications but with not woth servlets. i use 'javac -classpath /path/servlet.jar . this didnot help. when i put everything in classpath bash env variable, jdk complains noClassdefFoundError. what do i do?,.. __ Get Your Private, Free Email at http://www.hotmail.com -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Thread in the Linux's JVM
Jacob Nikom wrote: > I use SwingWorker class. If I don't have JNI methods I don't have > to use yield() method. If I replace my Java methods with JNI calls > I must use yield(), otherwise the application simply does not work. > There is no mentioning of yield() method in any SwingWorker-related > documentation. You should not depend on threads being preemtive. Just suppose that thread will switch ONLY when you sleep/yield/block and see if you program can accomplish it's tasks. All this stuff with preemptivnes is only important when you have to run some not fully trusted code - for example applets or servlets, you have to be able to kill runaway thread. In other cases one can really go away with cooperative threads (of course good programs has to be written for worst case at every point - a) that thread will never switch unless explicitly told to, b) thread will switch at every possible point it can do something bad :) Artur -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Thread in the Linux's JVM
Jacob Nikom wrote: > It would be nice to know more about multithreading features of Linux > JVM. There are two threading models. If you run with green threads, there is no preemption, and control passes between threads either with yield() calls or possibly with other calls that can block (such as sleep() and various I/O calls). If you run with native threads, the JVM is using the system's pthread API, which (except for very strangely configured systems) means it's using kernel threads. They give you preemption but not thread priorities, and there is no guarantee about the size of the time slices, when preemption occurs, or how thread execution is distributed across multiple processors. It sounds from your description like you're relying on preemption. Unfortunately, that's a bad thing - Java doesn't guarantee that you'll get it, and you need to code as if preemption will not happen. SwingWorker is a nice tool for conveniently launching another thread, but it doesn't magically turn non-preemptive threads into preemptive threads. So to your problem... why did the behavior change when you rewrote some of your Java methods as native methods? My guess is that you were using some Java methods that do voluntary yields, and you stopped using them when you rewrote the code as native methods. BTW, that Sun article mentioned in Evandro's original mail (below) discusses why Solaris is a good platform for applications that rely on preemptive multi-threading. But it's a Solaris marketing article, not a Java programming guide. The Java portability message is very clear: don't rely on preemption. Nathan > > Hi, > > Thank you for bringing up this question. I also have problems with > multiple threads in Linux. In my case the behavior of threads with > JNI is different from pure Java behavior. > > I use SwingWorker class. If I don't have JNI methods I don't have > to use yield() method. If I replace my Java methods with JNI calls > I must use yield(), otherwise the application simply does not work. > There is no mentioning of yield() method in any SwingWorker-related > documentation. > > It would be nice to know more about multithreading features of Linux > JVM. > > Jacob Nikom > > > Evandro Luquini wrote: > > > > Hi, > > In the JavaWord article called "programming Java threads in the real > > world, Part 1( > > http://www.javaworld.com/jw-09-1998/jw-09-threads.html)", the author > > sad that "Java's promise of platform independence falls flat on its > > face in the threads arena". If you read this paper you will can see > > two plataform example : NT and Solaris. > > > > Major question is what scheduling is implemented by the Linux JVM and > > the Linux OS. Does it use a nonpreemptive our preemptive scheduler ? > > > > The other important question is about what thread's architecture is > > implement by Linux O.S. I am asking it because in the sun's paper > > "Multithreading: General And Java-Specific Information > > >(http://www.sun.com/solaris/java/wp-java/4.html;$sessionid$5CBVN2YAAI4VTAMW0JZE3NUBS1JHEUDO)" > > sad : "Understanding the architectural advantages of one native MT > > environment/architecture over another is critical to an understanding > > of the advantages of one Java implementation over another. Since a > > typical JVM runtime is implemented on top of the traditional platform, > > a richer, architecturally superior MT platform will obviously > > translate to a superior Java MT environment for Java applications on > > that platform. The native OS threads model greatly influences Java > > application performance." > > > > Thanks > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: ¦^ÂÐ : Question
You need to specify the jar in the applet tag as well #:) DD23 CCChang2 wrote: > > Hi James : > > Thanks for your reply, but I still got the problem: > > My HTML code releate to Applet: > >> CODEBASE="http://10.3.13.19/~jonesc" > > WIDTH=600 HEIGHT=250> > > > > I had put my OutputApplet.class & postgresql.jar in same directory. > > and PostgreSql database & Apache Server on same machine (Linux Redhat > > 6.0). > > > > 1. When I use IE4.0 from Micro$oft Win95, I got the message in applet > > window: > > "Can't find Database driver class: java.lang.ClassNotFoundException: > > postgresql/Driver" > > 2. When I goto the same linux machine, use netscape browser, I got the > > same error reply. > > 3. But on this machine, I use appletviewer index.html, the applet can > > success got data through > > JDBC to Postgresql database. > > > > > > -- > > : James Seigel [SMTP:[EMAIL PROTECTED]] > > > > : DD23 CCChang2 > > : [EMAIL PROTECTED] > > : Re: Question > > > > Check your applet tag for codebase tag > > Check to make sure your datbase driver is available in the directory > > where > > your codebase is implied. > > Make sure you database is on the same machine as the applet is > > loaded > > from. > > > > > > 3 is for after you fix the first two. > > > > J > > > > Pooh Bear -- "I am just a bear of little brain" > > > > > > On Thu, 4 Nov 1999, DD23 CCChang2 wrote: > > > > > > > > > Dear Sirs: > > > > I am junior JAVA programmer, one question need your help. > > > > I had RedHat Linux 6.0 with Java 1.2 SDK and PostgreSQL > > database, > > > > and my web server is Apache 1.3.6 version. > > > > I had copy the postgresql.jar into /jdk1.2/jre/lib/ext. > > > > > > > > then, I wrote an applet just query the data from PostgreSql > > database, > > > > and show the result on screen, then created the test.html file, > > > > and include the class , when I use appletviewer test.html, I can > > see > > > > the data everything is OK, > > > > > > > > but when I put the html on my web, then I can see the applet > > area show > > > > "Can't find Database Driver .. postgresql.drive" > > > > It's anything Linux envirounment setting error? > > > > Tks! > > > > > > > > Jones Chang > > > > > > > > > > > > > > > -- > > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > > with a subject of "unsubscribe". Trouble? Contact > > [EMAIL PROTECTED] > > > > > > > > > > > -- > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
[Q] problem with displaying image
Hi, everyone, I am currently writing a Java program that displays an image constructed from MemoryImageSource. I start out by displaying the "portrait" orientation of the image and have one button for the user to toggle between "portrait" and "landscape" orientation. The problem is that when the program starts out in "portrait" orientation, I cannot switch to "landscape". The only way I can display the image in "landscape" orientation is to start out the program by displaying using "landscape" orientation. Did anyone have this problem before? I'm using JDK 1.1.7 v3 (Black-down) under RedHat 6.0. Eric -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: silly newbie question
Use JAVA_HOME environment variable and assign your classpath to it. Jacob Nikom Jalaluddin Riaz wrote: > > pardon me for this silly question, but i have to know. How do i set multiple > classpaths? i have jdk1.2pre2 running and want to do some stuff with > servlets and jdbc. the jdbc is fine for applets and applications but with > not woth servlets. i use 'javac -classpath /path/servlet.jar . this > didnot help. when i put everything in classpath bash env variable, jdk > complains noClassdefFoundError. > > what do i do?,.. > > __ > Get Your Private, Free Email at http://www.hotmail.com > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: easy question
Wow, are *you* in for a mess. :) OK--this is just a suggestion, and half this stuff is being made up on the spot, but this is how I'd structure your directory. Assume your project is called "Project" Project +--src +--cls These two are your Java "source" and "class" directories, respectively. Assuming you're building with Java 2, you can do the following quickie script to build all the java code in the 'src' directory (from the project root) and have the compiled .class files show up in the 'cls' directory: (where $(PROJECT_HOME) = the "project root" directory) find $(PROJECT_HOME) -name '*.java' -print > $(PROJECT_HOME)/.sourcefiles javac -srcpath $(PROJECT_HOME)/src -d $(PROJECT_HOME)/cls @$(PROJECT_HOME)/.sourcefiles Add a $(DEBUG) or other flags-type environment variable to switch debug/nondebug modes on or off; I'd put this into a makefile that also controls the JNI/C compilation (discussed in a second). This script doesn't perform full dependency-checking, so you'll probably want to do a 'rm -r *.class' from the $(PROJECT_HOME) directory, but it's quick and dirty and doesn't require .java-file dependency tracking, at the cost of longer compiles. Adjust as necessary for your own needs. Then, under the same directory, do Project +--c_src +--inc This is, of course, where the JNI/C code goes, and the JNI headers go into the $(PROJECT_HOME)/inc (or 'include', if you prefer) directory. Depending on what #include syntax you prefer (I like '#include <$(PROJECT)/file.h>', as opposed to just '#include "file.h"', so I know where each include file is coming from), you can rename the 'inc' directory to $(PROJECT) and set the compiler's "-I $(PROJECT_HOME)" flag. That way your JNI/C code is explicitly documenting where it's getting the JNI headers from. Do the usual make/makedeps with this, either in the same makefile that handles the java code (ideally), or in a makefile that's fired from the java project's makefile. For the HTML/JavaScript code, I'd do Project +--public_html +--cgi_bin javascript I'm less familiar with how to arrange HTML files in a source-controlled project, since I've not done much with them recently, but since HTML requires no compilation, you're really just trying to create the appropriate HTML structure here, nothing more. For debug/release deployment, I'd set up your makefile/build-script to compile everything, with $(DEBUG) flags turned on or off (depending on whether you do 'make -DDEBUG' or not, for example), and have the generated executables, .jar files and .zip (of the HTML files) files "released" (that is, copied) to one of two directories in the same project directory: Project +--alpha +--release Ideally, you'd be able to then run a script from within each directory to "deploy" the code (to a Web server or simply to another location on your filesystem) as appropriate. As far as RCS goes, either just store the files in a separate location, or use CVS (my preference) and store them on another server--it doesn't affect how the files themselves are laid out on disk, IMHO. It's rough, crude, and could probably use several iterations of refinement. I *more* than welcome comments--I'd love to hear anybody's ideas on so complex an application of "proper build procedures". Ted Neward CTO, WebRaiser ( http://www.webraiser.com ) Java Instructor, DevelopMentor ( http://www.develop.com ) Patterns/C++/Java/CORBA/EJB/COM-DCOM spoken here http://www.javageeks.com/~tneward -Original Message- From: Solomon Douglas <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Cc: David Harrison <[EMAIL PROTECTED]> Date: Monday, November 08, 1999 11:42 AM Subject: easy question >I apologize that this isn't a specifically Linux-related question. > >I'm working on a project involving several servlets and other classes, >organized in multiple java packages, and I don't think I've figured >out the ideal way to structure my directories. This is a web-based >application, so in addition to the server-side Java classes, I also >have HTML and javascript files to deal with. Thank goodness there are >no applets (yet), because that would make it even more confusing! I >have the following files: > >- Java source code files and their associated RCS files >- C source code (and RCS) for JNI methods >- the development version of the shared libraries for the JNI methods >- the production version of the shared libraries for the JNI methods >- the development version of the Java class files >- the production version of the Java class files >- static HTML and JavaScript source files (development version and RCS) >- static HTML and JavaScript source files (production version) > >How does one set up the directory structure for such a project? The >class files evidently need to be in a directory hierarchy that mirrors >the package hierarchy. I feel that I need the Java source files to be >in a similar hierarchy - should it be a parallel tree or should I keep >the sources in the sam
