I do not think you needed to go through this much effort. There is a
replacement for this class in Project Wonder. The code there looked remarkably
like your decompilation.
I just changed the _ignoredPackages method in the Project Wonder version to be
quite a bit more resistant to exceptions. I guess that if you have a method
looping through frameworks looking for plists and there is some exception
reading the plist, someone might care. I cannot imagine who that would be,
though.
cheers - ray
On Jul 8, 2011, at 10:51 AM, Lars Sonchocky-Helldorf wrote:
> I regularly see the following stacktrace in our applications log:
>
> [2011-7-8 10:4:1 CEST] <WorkerThread3> java.lang.NullPointerException
> at
> com.webobjects.woextensions.WOExceptionParser._ignoredPackages(WOExceptionParser.java:63)
> at
> com.webobjects.woextensions.WOExceptionParser._parseException(WOExceptionParser.java:105)
> at
> com.webobjects.woextensions.WOExceptionParser.<init>(WOExceptionParser.java:44)
> at
> com.webobjects.woextensions.WOExceptionPage.setException(WOExceptionPage.java:33)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> com.webobjects.woextensions.KeyValueCodingProtectedAccessor.setMethodValue(KeyValueCodingProtectedAccessor.java:34)
> at
> com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.setValueInObject(NSKeyValueCoding.java:1150)
> at
> com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.takeValueForKey(NSKeyValueCoding.java:1354)
> at
> com.webobjects.appserver.WOComponent.takeValueForKey(WOComponent.java:1748)
> at
> com.webobjects.appserver.WOApplication._handleError(WOApplication.java:3093)
> at
> com.webobjects.appserver.WOApplication.handleException(WOApplication.java:3245)
> at
> com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:389)
> at
> com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:445)
> at er.ajax.AjaxRequestHandler.handleRequest(AjaxRequestHandler.java:17)
> at
> com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
> at
> com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
> at
> com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
> at java.lang.Thread.run(Thread.java:662)
>
> Since there is none of our code involved it seems to be an issue with WO
> 5.4.3. Usually it seems to appear after another bug was triggered before.
> Looks like the Exception Page doesn't get filled in correctly in those cases.
> So I decompiled the Code in question
> (com.webobjects.woextensions.WOExceptionParser):
>
> /* */ protected NSArray _ignoredPackages()
> /* */ {
> /* 53 */ NSMutableArray allBundles = new
> NSMutableArray(NSBundle.frameworkBundles());
> /* 54 */ NSMutableArray ignored = new NSMutableArray();
> /* */
> /* 56 */ Enumeration enumerator = allBundles.objectEnumerator();
> /* 57 */ while (enumerator.hasMoreElements()) {
> /* 58 */ NSBundle bundle = (NSBundle)enumerator.nextElement();
> /* 59 */ String path =
> WOApplication.application().resourceManager().pathForResourceNamed("WOIgnoredPackage.plist",
> bundle.name(), null);
> /* 60 */ if (path != null);
> /* 61 */ String content = _stringFromFile(path);
> /* 62 */ NSDictionary dic =
> (NSDictionary)NSPropertyListSerialization.propertyListFromString(content);
> /* 63 */ NSArray tmpArray =
> (NSArray)dic.objectForKey("ignoredPackages");
> /* 64 */ if ((tmpArray != null) && (tmpArray.count() > 0));
> /* 65 */ ignored.addObjectsFromArray(tmpArray);
> /* */ }
>
> Somehow that looks fishy to me. Note line 60 and line 64, the semicolon at
> the end of each. Either those are bugs or the decompiler (JD
> http://java.decompiler.free.fr/ ) has failed severely.
>
> Either way, how would I avoid such stacktraces? Providing an dummy
> WOIgnoredPackage.plist with dummy entries?
>
>
> cheers,
>
> Lars
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