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From Daniel Gong <daniel.gong.fu...@gmail.com>
Subject Re: [GSoC] Proposal for HARMONY-6457
Date Mon, 05 Apr 2010 15:19:36 GMT
Thanks, Mark, for your reminding. I'll make sure that whenever there
exist off-list discussions, they  will be summarized and posted here.

Best wishes
Daniel Gong


On Sun, Apr 4, 2010 at 10:24 PM, Mark Hindess
<mark.hindess@googlemail.com>wrote:

>
> In message <t2lec53d1751004030755y74aad3d5sd78b3f7c6348dde8@mail.gmail.com
> >,
> Jing Lv writes:
> >
> > Hi Daniel,
> >
> >      That is great. Welcome!
> >      And I believe you can discuss directly with the project mentor as
> > well, which will be more efficient and help you understand the problem
> > better.
>
> I'd rather all technical discussion happened on the dev@ list please.
> Summaries of off-list technical discussions (in person or on IM/IRC
> for instance) should be posted to the dev@ list with credit to those
> involved.  Then we can all understand the problem (and solution) better.
>
> Thanks,
>  Mark.
>
> > 2010/4/3 Daniel Gong <daniel.gong.fudan@gmail.com>
> >
> > > Hello everyone,
> > >
> > >    Last year I've worked as a gsoc student in Harmony and learned
> > > a lot during the project. I'm eager to participate gsoc 2010 and
> > > looking forward to working in Harmony as well :)
> > >
> > >    I've submit my proposal to the gsoc project website. For your
> > > convenience, I'd like to post it here and discuss it with you. I've
> > > skimmed through the document of JPDA and I'm currently read some
> > > jdwp source code to get familiar with the logging system.
> > >
> > > =====================================================================
> > >
> > > *Student Name:*
> > >
> > > Linghui Gong
> > >
> > > *Student E-mail:*
> > >
> > > daniel.gong.fudan@gmail.com
> > >
> > > *Student Major:*
> > >
> > > Computer Science
> > >
> > > *Student Degree:*
> > >
> > > Studying for Master of Science Degree, 2nd year
> > >
> > > *Organization/Project:*
> > >
> > > Harmony Project, The Apache Software Foundation
> > >
> > > *Assigned Mentor:*
> > >
> > > Sean Qiu
> > >
> > > *Proposal Abstract:*
> > >
> > > The aim of the project is trying to enhance harmony's jdwp log system
> to
> > > facilitate jdwp debugging by adding support of thread information and
> > > implementing a log analyzer to sort log messages according to user
> demands
> > > and find out bug-prone message.
> > >
> > > *Detailed Description:*
> > >
> > > Harmony current JDWP agent have full logging functionality. But all log
> > > messages are messed up regardless of its running thread information.
> > >
> > > On the other hand, Harmony JDWP support a lot of types log level, user
> need
> > > to rerun the appilcation to get different type of log. It would be much
> > > convenient if we have a log analyzer to help sort out log messages,
> then we
> > > can only need get the all log message.
> > >
> > > This project should include the following steps:
> > > 1. Modify the jdwp agent code to support thread information in the log.
> > > 2. Implement a log analyzer that can sort out different kind of log
> > > messages
> > > according to user demands.
> > > 3. Improve the log analyzer to make it enable to analyze the log
> message
> > > sequence with context and find out bug-prone log message.
> > >
> > > I've read part of the jdwp source code and I believe the first two
> steps
> > > are
> > > not difficult to implement. The last step is a challenging one.
> > >
> > > In my understanding, some messages may be judged as bug-prone one only
> with
> > > information from itself and others may need context to decide, which
> > > indicates that sequence analysis should be included in the analyzer.
> > > Methods
> > > such as rule-based classification or heuristic pattern recognition can
> be
> > > employed to accomplish the task. In my experience, I've used
> > > CRF(Conditional
> > > Random Fields) to analyze sentences and tag words and phrases. It works
> > > well. However, currently I'm not very sure that this is the best choice
> for
> > > this project. Several literature I've read claimed that rule-based
> > > classification costs less but is more adjustable and gives decent
> result. I
> > > need to do more investigating.
> > >
> > > *Draft Timeline*
> > >
> > >   - Week 1      Read and understand the JDWP logging related code;
> > >   - Week 2      Read and get familiar with the JDWP and JVMTI document;
> > >   - Week 3-4   Complete the thread information support;
> > >   - Week 5-6   Implement the log analyzer initial version with log
> sorting
> > >   functionality;
> > >   - Week 7-10  Add the bug-prone message judgement functionality to the
> > >   analyzer;
> > >   - Week 11    Fix all bugs left and complete the documentian work.
> > >
> > > *Available Time*
> > >
> > >   - Generally, I have 14~16 hours per week in average guaranteed
> working on
> > >   the subject.
> > >   - I'm a 2nd year graduate student and do not have any classes or
> exams to
> > >   attend, which allow me to have enough time to complete the project.
> > >
> > >  *Additional Information:*
> > >
> > > I've been learning and using Java since 4 years ago. In the past I've
> > > complete several projects based on java, including a mini library
> > > management
> > > system, a text stream clustering system, a search engine project based
> on
> > > Apache Lucene. I've got rich experience of Java language, programming
> and
> > > debugging from them.
> > >
> > > Last year I've participated in Google Summer of Code and successfully
> > > accomplished the harmony-classes-selector project of Harmony under the
> > > mentoring of Regis. In the project, I came across JVMTI in the first
> time
> > > and built an agent for the project. As a result, I became very
> interested
> > > in
> > > Java runtime technology and I've learned and got to know more knowledge
> in
> > > this area including Java class file format, instrumentation, JPDA and
> so
> > > on.
> > >
> > > I believe these professional knowledge and my other knowledge in
> > > programming
> > > and software architecture can help me to learn fast and handle the
> problem.
> > >
> > > I'm 24 years old, living in Shanghai, China, studying in Fudan
> University.
> > >
> > > =====================================================================
> > > Thanks for your attention!
> > >
> > > Best wishes
> > > Daniel Gong
> > >
> >
> >
> >
> > --
> > Best Regards,
> > --------------------
> > Lv Jing
> > Apache Harmony PMC
> > IBM CDL
> >
> > --0016e64c145a8e3233048356485b--
> >
>
>
>

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