keep in mind for going that direction that aspectJ has limited support in some IDE's (e.g. intellij). can complicate the development.
2011/3/23 Konstantin Boudnik <c...@apache.org> > [Moving to common-user@, Bcc'ing general@] > > If you know where you need to have your print statements you can use > AspectJ to do runtime injection of needed java code into desirable > spots. You don't need to even touch the source code for that - just > instrument (weave) the jar file > -- > Take care, > Konstantin (Cos) Boudnik > > On Tue, Mar 22, 2011 at 09:19, Bo Sang <sampl...@gmail.com> wrote: > > Hi, guys: > > > > I would like to do some minor modification of Hadoop (just to insert some > > print codes into particular places). And I have the following questions: > > > > 1. It seems there are three parts of Hadoop: common, hdfs, mapred. And > they > > are packed as three independent jar packages. Could I only modify one > part > > (eg, common) and pack a new jar package without modifying the rest two. > > > > 2. I have try to import the folder hadoop-0.21.0/common into eclipse as a > > project. But eclipse fails to recognize it as an existing project. But if > I > > import folder hadoop-0.21.0 as a existing project, it works. However, I > only > > want to modify common part. How could I only modify common part and > export > > a new common jar package without modifying the rest two parts. > > > > -- > > Best Regards! > > > > Sincerely > > Bo Sang > > >
