Re: [aspectj-users] LTW of an applet

["Andy Clement" <andrew.clement@xxxxxxxxx>]

Run it with all the flags set for debug and trace:

-Daj.weaving.verbose=true -Dorg.aspectj.weaver.showWeaveInfo=true -Dorg.aspectj.tracing.messages=true -Dorg.aspectj.tracing.enabled=true -Dorg.aspectj.tracing.factory=default

You will see trace but also 'I' entries which are info messages from the weaver.  The setup would be that you need the aspects on the aspectpath and and on the classpath, there is no aop.xml required as you are directly telling the weaver what the aspects are through the constructor.  I just tried it and it worked for me:

public class Sample {
    public static void main(String[] args) throws Exception {

        URL[] cpath = getClasspath("foo.jar", "aspects.jar");
        URL[] apath = getClasspath("aspects.jar");

        WeavingURLClassLoader wucl = new WeavingURLClassLoader(cpath, apath, Thread.currentThread().getContextClassLoader());

        Class foo = wucl.loadClass("Foo");
        Method m = foo.getMethod("m", null);
        m.invoke(foo.newInstance(), null);
    }

    public static URL[] getClasspath(String... files) throws Exception {
        URL[] urls = new URL[files.length];
        int pos = 0;
        for (String file : files) {
            urls[pos++] = new File(file).toURL();
        }
        return urls;
    }
}

In the verbose output from tracing I see:

12:09:05.578 main I [WeavingAdaptor] info AspectJ Weaver Version DEVELOPMENT built on Tuesday Oct 21, 2008 at 18:57:36 GMT
12:09:05.812 main I [WeavingAdaptor] info adding aspect library: 'C:\asc\ws\aspectj16_2\A\aspects.jar'
12:09:06.312 main ? [WeavingAdaptor] weaveinfo Join point 'staticinitialization(void Foo.<clinit>())' in Type 'Foo' (Foo.java) advised by before advice from 'X' (aspects.jar!X.class:2(from X.java))

And my advice runs.

Andy.

2008/10/22 kfinkels <keren@xxxxxxxxxx>

Hi,
I'm trying to LTW an applet - using a wrapper applet.
I have the jar - including the source applet, a jar including the aspects
and an applet that initialize the WeavingURLClassLoader and load the
source-applet.
in the html applet tag - I set the aspectjrt & aspectjweaver jars as
archive.
all jars are signed.
The problem is that the source is not weaving and works like there are no
aspects to run.
I get the source applet visible and no error at all!!!!

the aop.xml file is in the wrapper jar - is that correct? - what am I doing
wrong?
pls help - I'm desperate.

here is the code of the wrapper applet:

import java.awt.Component;
import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.JarFile;

import javax.swing.JApplet;

import org.aspectj.weaver.loadtime.WeavingURLClassLoader;

public class SmApplet extends JApplet {
       public void init() {

               try {

                       File source = new
File("C:/workspace/HackClassLoader/target/AOP-1.0.jar");
                       File aspect = new
File("C:/workspace/HackClassLoader/target/demoAOP-1.0.jar");
                       URL[] urlList = {source.toURL(), aspect.toURL()};
                       URL[] aspectUrlList = {};

                       WeavingURLClassLoader weavingClassLoader = new
WeavingURLClassLoader(urlList, aspectUrlList,
Thread.currentThread().getContextClassLoader());

                       Class mainApplet =
weavingClassLoader.loadClass("demoAOP.HelloMainApplet");
                       Object applet = mainApplet.newInstance();

                       if (mainApplet != null) {

                               Class[] args = null;
                               Method init = mainApplet.getMethod("init", args);
                               init.invoke(applet, (Object[])null);
                               this.add((Component)applet);
                       }

               } catch (MalformedURLException me){
                       System.out.println("MalformedURLException");
                       me.printStackTrace();
               } catch (ClassNotFoundException cx){
                       System.out.println("ClassNotFoundException");
                       cx.printStackTrace();
               } catch (NoSuchMethodException nx){
                       System.out.println("NoSuchMethodException");
                       nx.printStackTrace();
               } catch (InvocationTargetException ix){
                       System.out.println("InvocationTargetException");
                       ix.printStackTrace();
               } catch (IllegalAccessException ax){
                       System.out.println("IllegalAccessException");
                       ax.printStackTrace();
               } catch (InstantiationException ee) {
                       System.out.println("InstantiationException");
                       ee.printStackTrace();
               }

       }

}

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