Eclipse Howto

Hi I'm trying Jnode in eclipse, I want to buitl but, once I imported the project in eclipse this is what I recibe:

Description Resource Path Location Type
The project was not built since it depends on builder, which has build path errors all Unknown Java Problem
The project cannot be built until build path errors are resolved builder Unknown Java Problem
The project cannot be built until build path errors are resolved cli Unknown Java Problem
The project cannot be built until build path errors are resolved core Unknown Java Problem
The project cannot be built until build path errors are resolved distr Unknown Java Problem
The project cannot be built until build path errors are resolved fs Unknown Java Problem
The project cannot be built until build path errors are resolved gui Unknown Java Problem
The project cannot be built until build path errors are resolved net Unknown Java Problem
The project cannot be built until build path errors are resolved shell Unknown Java Problem
The project cannot be built until build path errors are resolved textui Unknown Java Problem
Project 'textui' is missing required library: '/all/lib/classlib.jar' textui Build path Build Path Problem
Project 'shell' is missing required library: '/all/lib/classlib.jar' shell Build path Build Path Problem
Project 'net' is missing required library: '/all/lib/classlib.jar' net Build path Build Path Problem
Project 'gui' is missing required library: '/all/lib/classlib.jar' gui Build path Build Path Problem
Project 'fs' is missing required library: '/all/lib/classlib.jar' fs Build path Build Path Problem
Project 'distr' is missing required library: '/all/lib/classlib.jar' distr Build path Build Path Problem
Project 'core' is missing required library: '/all/lib/classlib.jar' core Build path Build Path Problem
Project 'cli' is missing required library: '/all/lib/classlib.jar' cli Build path Build Path Problem
Project 'builder' is missing required library: '/all/lib/classlib.jar' builder Build path Build Path Problem

I took the code from SVN (revision 5863 the complete trunk directory), but I didn't find classlib.jar, I guess that if I including this jar, I'll be able to buitl Jnode, but i can't find.

Thanks for your help.

Note that: this method only resolves the out of memory error while building is initiated by eclipse rather than ant.

Generally, this problem is usually caused by insufficient heap memory configured for jvm. For eclipse, this configuration can be modified by editing eclipse.ini file which is located under the same directory where eclipse.exe lies.

For my laptop which has configured with 2G memory, I used the following config, and it works. (the bold part marked out the significant modification)

-startup
plugins\org.eclipse.equinox.launcher_1.0.100.v20080509-1800.jar
--launcher.library
plugins\org.eclipse.equinox.launcher.win32.win32.x86_1.0.100.v20080509-1800
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
128m
-vmargs
-Xms256m
-Xmx1024m

If you've encountered startup problems, it may indicates that you have insufficient memory. You can try -Xmx600m instead. (In my experiment, compilation will take out at least 547M memory when eclipse is clean started, which means it will take more memory if you have started and used eclipse for a while.)

Tested under eclipse 3.4 (Ganymede)

Good luck pals, and wish you have fun with jnode.

With the release of Eclipse Ganymede, it might be possible to simplify this part of setting up a development environment.

1. Install the Subversion plug-in.

2. Install a Subversion Connector.

3. Starting with a new workspace, check out each module using the Subversion plug-in.

CAUTION: When checking out a module, use the Find/Check Out As.. option. It is important to preserve the original module names in your Eclipse workspace.

all instead of JNode-All
core instead of JNode-Core
distr instead of JNode-Distr
docs instead of JNode-Docs
etc..

After checking out modules with Find/Check Out As..., right-click on a project and select Properties... Adjust the Java Build Path properties of each project to reflect the original module names. Replace projects on Projects tab. Replace jars on the Libraries tab.

To compile without an out-of-memory error, use the -Xmx512M -Xms128M arguments for Installed JREs. Go to core project properties | Java Compiler | Errors/Warnings. Enable project specific settings. Ignore tens of thousands of warnings.

Modify the org.jnode.naming.AbstractNameSpace class so that it does not use org.jnode.vm.Unsafe.
try {
// if a service is already bound for that name =>
// notify the listener right now
l.serviceBound(lookup(name));
} catch (NameNotFoundException e) {
// no service bound for that name => ignore
// *D! Unsafe.debugStackTrace(e);
System.out.println("no service bound for that name => ignore");
e.printStackTrace();
}

To run on Windows XP, run org.jnode.emu.ShellEmu as a Java application.

Here is how to solve the OutOfMemoryError exception under eclipse 3 :

- select menu Run -> External Tools -> External Tools ...

- on the left side, select a child of the node named Ant build (or create a new one)

- on the right side, select the JRE tab and add -Xmx512M -Xms128M in VM arguments

Fabien

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