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Re: [Jmol-developers] clone atom error?
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From: Bob H. <ha...@st...> - 2007-02-10 17:11:26
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I'm working on it. I'm using this opportunity to clean up all the readers' error handling. We have quite a soup. This will standardize them all: readAtomSetCollection() will NOT throw Exception but instead in all cases do try/catch with a standardized setError(Exception e) call in the catch to set atomSetCollection.errorMessage with an indication of which line caused the error. One of these errors might be our out-of-memory clone error. I'm half-way done, and it looks much cleaner now. Bob Nicolas Vervelle wrote: >This is difficult for me to answer on this subject since all my mails to >Jmol devs are bounced back ... > >I really think there's nothing more to do on this: >- CloneNotSupportedException will *never* be thrown (whatever version of >Java3D we are using) >- we can't do much about OutOfMemoryException, there's just not enough >memory > >We can add a Logger.error() call in the catch, but honestly I don't see >anything more needed. > >Nico > > >Bob Hanson wrote: > > >>apparently the problem is that different versions of Java throw >>different errors. So it might be best to catch this here and pass it on >>as a different exception, perhaps JmolCloneAtomException. >> >>Is that easy to do? >> >>Bob >> >> >>René Kanters wrote: >> >> >> >> >>>Hi, >>> >>>When I use Eclipse and comment out the try/catch clause around around >>>the return (Atom)super.clone(), I only get the message the >>>the CloneNotSupportedException is not caught. I can not get the >>>javadoc for the particular javax.vecmath.Point3f class, so it is hard >>>to tell which exceptions could be thrown. When checking the online >>>java3d Point3f documentation I see it descends from the Tuple3f and >>>that class's clone method only throws a java.lang.OutOfMemoryError >>>(and doesn't mention the clone not supported one). >>> >>>It seems to me that the safest thing to do is to not catch the >>>exception if there is not something useful you can do with it. This >>>means that a lot of methods need to have the 'throws ....' added to >>>them, but it should make the interface clearer and allow the 'highest >>>level' caller, usually the reader (or some symmetry calculation which >>>can produce more atoms in an atomset), to be able to figure out that >>>something was wrong when the file was read. >>> >>>As Miguel points out it can be very dangerous to return a null when >>>there really was an 'exceptional' condition in the execution of the >>>code, unless you rethrow the exception (but in that case I don't think >>>the return value even comes back to the callee....). >>> >>>Just my rusty thoughts this subject.... >>> >>>Cheers, >>>René >>> >>>On Feb 10, 2007, at 7:02 AM, Bob Hanson wrote: >>> >>> >>> >>> >>>>Thanks, Miguel. Yes, that's very helpful. The context is the copying >>>>of a coordinate data set for vibrations and such. >>>> >>>>Can someone remind me when it is that this error became a problem? >>>> >>>>Is it >>>> >>>>(a) that certain implementations of Java don't clone our atoms, and >>>>so were properly throwing this clone exception, or >>>> >>>>(b) that we were looking for the wrong exception in those cases, and >>>>although >>>>the exception was never actually thrown, the presence of the try/catch >>>>was not compiling on those machines? >>>> >>>>Bob >>>> >>>> >>>> >>>>------------------------------------------------------------------------- >>>>Using Tomcat but need to do more? Need to support web services, security? >>>>Get stuff done quickly with pre-integrated technology to make your >>>>job easier. >>>>Download IBM WebSphere Application Server v.1.0.1 based on Apache >>>>Geronimo >>>>http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 >>>><http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> >>>>_______________________________________________ >>>>Jmol-developers mailing list >>>>Jmo...@li... >>>><mailto:Jmo...@li...> >>>>https://lists.sourceforge.net/lists/listinfo/jmol-developers >>>> >>>> >>>> >>>------------------------------------------------------------------------ >>> >>>------------------------------------------------------------------------- >>>Using Tomcat but need to do more? Need to support web services, security? >>>Get stuff done quickly with pre-integrated technology to make your job easier. >>>Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo >>>http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 >>> >>>------------------------------------------------------------------------ >>> >>>_______________________________________________ >>>Jmol-developers mailing list >>>Jmo...@li... >>>https://lists.sourceforge.net/lists/listinfo/jmol-developers >>> >>> >>> >>> >>> >>------------------------------------------------------------------------- >>Using Tomcat but need to do more? Need to support web services, security? >>Get stuff done quickly with pre-integrated technology to make your job easier. >>Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo >>http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 >>_______________________________________________ >>Jmol-developers mailing list >>Jmo...@li... >>https://lists.sourceforge.net/lists/listinfo/jmol-developers >> >> >> >> > > >------------------------------------------------------------------------- >Using Tomcat but need to do more? Need to support web services, security? >Get stuff done quickly with pre-integrated technology to make your job easier. >Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo >http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 >_______________________________________________ >Jmol-developers mailing list >Jmo...@li... >https://lists.sourceforge.net/lists/listinfo/jmol-developers > > |