Home » Language IDEs » AspectJ » NoClassDefFoundError with Aspectj 1.2 (upd) on Eclipse 2.1.3
| NoClassDefFoundError with Aspectj 1.2 (upd) on Eclipse 2.1.3 [message #39680] |
Mon, 02 August 2004 06:36  |
Eclipse User |
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Originally posted by: christian.eugster.bluewin.ch
Hello
I am using Eclipse 2.1.3, have ajdt 1.4 installed and updated for Aspectj
1.2. Because I am new to aspect-oriented Programming, I tried to implement
first a logging aspect as I learned by "AspectJ in action" (see the source
below). I can ompile the whole code without problems, but running the
example I get always an NoClassDefFoundError. This Error occures at the
first place, where i use one of my core classes named Path, that has some
static String constants containing pathnames to the system. Without aspectj
the project runs problemless.
I searched the web, found an entry in the bugzilla tool for eclipse
(https://bugs.eclipse.org/bugs/show_bug.cgi?id=44587) but that points to
ajdt 1.4 without update. Has anybody any idea how I could solve that
problem? Thank you in advance!
Christian
/*
* Created on 21.07.2004
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package ch.eugster.pos;
import ch.eugster.pos.client.event.ExceptionThrownDelegate;
import ch.eugster.pos.client.event.ExceptionThrownEvent;
import ch.eugster.pos.util.Path;
import java.io.IOException;
import java.lang.SecurityException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;
import org.aspectj.lang.Signature;
/**
* @author ceugster
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public aspect LoggingAspect {
private Logger _logger = Logger.getLogger("logging");
private Level level = Level.SEVERE;
LoggingAspect() {
_logger.setLevel(level);
try {
FileHandler fh = new FileHandler(Path.logDir.concat(Path.FILE_LOG), true);
fh.setFormatter(new SimpleFormatter());
}
catch (IOException e) {
}
catch (SecurityException e) {
}
catch (ExceptionInInitializerError e) {
}
}
pointcut traceMethods()
: execution(* *(..)) && !within(LoggingAspect);
before() : traceMethods() {
if (_logger.isLoggable(Level.INFO)) {
Signature sig = thisJoinPointStaticPart.getSignature();
_logger.logp(Level.INFO,
sig.getDeclaringType().getName(),
sig.getName(),
"Entering: " + sig.getDeclaringType().getName() + "." + sig.getName());
}
}
after() : traceMethods() {
if (_logger.isLoggable(Level.INFO)) {
Signature sig = thisJoinPointStaticPart.getSignature();
_logger.logp(Level.INFO,
sig.getDeclaringType().getName(),
sig.getName(),
"Leaving: " + sig.getDeclaringType().getName() + "." + sig.getName());
}
}
pointcut exceptionLogMethods()
: execution(* *(..)) && !within(LoggingAspect);
after() throwing(Throwable ex) : exceptionLogMethods() {
if (_logger.isLoggable(Level.WARNING)) {
Signature sig = thisJoinPointStaticPart.getSignature();
_logger.logp(Level.WARNING,
sig.getDeclaringType().getName(),
sig.getName(),
"Exception thrown: " +
ex.getLocalizedMessage());
}
DateFormat df = SimpleDateFormat.getDateTimeInstance(SimpleDateFormat.SHORT,
SimpleDateFormat.SHORT);
ExceptionThrownDelegate.fireExceptionThrownEvent(new
ExceptionThrownEvent(df.format(new Date()) + ": Exception thrown - " +
ex.getLocalizedMessage() + "\n"));
}
}
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| Re: NoClassDefFoundError with Aspectj 1.2 (upd) on Eclipse 2.1.3 [message #39712 is a reply to message #39680] |
Mon, 02 August 2004 13:55  |
| Eclipse User |
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Originally posted by: mchapman.uk.ibm.com
On Mon, 02 Aug 2004 08:36:21 +0200, Christian Eugster wrote:
> I am using Eclipse 2.1.3, have ajdt 1.4 installed and updated for Aspectj
> 1.2. Because I am new to aspect-oriented Programming, I tried to
> implement first a logging aspect as I learned by "AspectJ in action" (see
> the source below). I can ompile the whole code without problems, but
> running the example I get always an NoClassDefFoundError. This Error
> occures at the first place, where i use one of my core classes named Path,
> that has some static String constants containing pathnames to the system.
> Without aspectj the project runs problemless.
>
> I searched the web, found an entry in the bugzilla tool for eclipse
> (https://bugs.eclipse.org/bugs/show_bug.cgi?id=44587) but that points to
> ajdt 1.4 without update. Has anybody any idea how I could solve that
> problem? Thank you in advance!
I'm not certain what is happening here, but the initializer might be
throwing an exception, which is then resulting in the
NoClassDefFoundError. I suggest you try adding a "catch (Throwable t)" to
the catch block around the call to new FileHandler, then do
"t.printStackTrace();" there, to see if this is the case.
Regards,
Matt.
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| Re: NoClassDefFoundError with Aspectj 1.2 (upd) on Eclipse 2.1.3 [message #582479 is a reply to message #39680] |
Mon, 02 August 2004 13:55 |
 Matt Chapman
Messages: 429
Registered: July 2009 |
Senior Member |
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On Mon, 02 Aug 2004 08:36:21 +0200, Christian Eugster wrote:
> I am using Eclipse 2.1.3, have ajdt 1.4 installed and updated for Aspectj
> 1.2. Because I am new to aspect-oriented Programming, I tried to
> implement first a logging aspect as I learned by "AspectJ in action" (see
> the source below). I can ompile the whole code without problems, but
> running the example I get always an NoClassDefFoundError. This Error
> occures at the first place, where i use one of my core classes named Path,
> that has some static String constants containing pathnames to the system.
> Without aspectj the project runs problemless.
>
> I searched the web, found an entry in the bugzilla tool for eclipse
> (https://bugs.eclipse.org/bugs/show_bug.cgi?id=44587) but that points to
> ajdt 1.4 without update. Has anybody any idea how I could solve that
> problem? Thank you in advance!
I'm not certain what is happening here, but the initializer might be
throwing an exception, which is then resulting in the
NoClassDefFoundError. I suggest you try adding a "catch (Throwable t)" to
the catch block around the call to new FileHandler, then do
"t.printStackTrace();" there, to see if this is the case.
Regards,
Matt.
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