Thanks Semih, I will give a try Sent from my iPhone
> On Jun 5, 2014, at 11:38 AM, Eugene Koontz <ekoo...@hiro-tan.org> wrote: > > Interesting; thanks Semih! I will try Graft out over the weekend. > > > >> On Jun 4, 2014, at 11:00 AM, Semih Salihoglu <se...@stanford.edu> wrote: >> >> Hi Giraph Users, >> >> I wanted to introduce to you Graft, a project that some of us at Stanford >> have built over the last quarter. If you are a Giraph user, who ran into an >> annoying bug in which the code was throwing an exception or resulting in >> incorrect looking messages or vertex values (e.g. NaNs or >> NullPointerExceptions) and you had put in println statements into your >> compute() functions, and then inspect logs of Hadoop workers for debugging >> purposes, you should read on. You might find Graft very useful. >> >> In a nutshell, Graft is based on the idea of capturing the contexts under >> which a bug becomes noticeable (an exception is thrown or an incorrect >> message is sent, or a vertex is assigned an incorrect value) >> programmatically. The captured contexts can then be visualized through a >> GUI. The contexts that a user thinks could be helpful for catching the bug >> can then be reproduced in a compilable program and the user can then use >> his/her favorite IDE's debugger to do step-by-step debugging into the >> context. For example, when a vertex v throws an exception, the user can >> reproduce the context under which v throws the exception and then use (say) >> Eclipse to do step-by-step debugging to see exactly what lines were executed >> that resulted in the exception being thrown. >> >> On the testing side, Graft makes it easier to generate unit and end-to-end >> tests by letting users curate small graphs through its GUI's testing mode, >> and then generates code snippets which can be copied and pasted into a JUnit >> test. >> >> The project is still under development but interested users can start using >> it. We have a wiki with documentation and instructions on how to install and >> use Graft: https://github.com/semihsalihoglu/graft/wiki. Since the project >> is under development, we'd highly appreciate users to start using it and >> giving us direction on how to make it more useful. Our emails are on the >> documentation page. We also encourage interested developers to contribute to >> it if there are requested features that we don't get to very quickly. >> >> Just a small note: Graft works for the Giraph at trunk: >> https://github.com/apache/giraph/tree/trunk. We do not support earlier >> version. In particular your programs need to be written by extending >> Computation and optionally the Master class, instead of the older Vertex >> class. >> >> Best, >> >> semih
