Dear MRQLers,
The current MRQL release is available at:
https://github.com/fegaras/mrql
To setup the ASF svn codebase, I will need to do some changes to
prepare it for the first commit. After that, I hope it will be open
and ready for others to commit. So I am requesting your feedback on
the following issues:
1) I need to update the copyright info on all source files.
Currently, each source file has a copy of the Apache License 2.0
at the top of the file, but it also has things that need to be removed,
such as "Copyright 2011-2012 Leonidas Fegaras, University of Texas at
Arlington".
See for example:
https://github.com/fegaras/mrql/blob/master/src/MapReducePlan.java
Is there a standard way to add Copyright info in the source files?
2) MRQL uses JLine, which is distributed under the BSD license.
Do we need to put this information some place in the codebase?
MRQL also uses JLex (a lexical analyzer) and CUP (a parser generator).
See http://www.cs.princeton.edu/~appel/modern/java/JLex/current/manual.html
and http://www2.cs.tum.edu/projects/cup/
They both have an open source license.
MRQL also uses the GEN package, written by me, which extends Java with
Abstract Syntax Trees, pattern matching, etc. MRQL uses these three
tools (JLex, CUP, and GEN) for developing the source code, but it does
not include any source code from these project.
3) To make MRQL easier to extend, I would need to split some source
files into smaller ones. There is a problem though: many developers
like to use IDEs, such as Eclipse or Netbeans. This is not easy with
MRQL. Some MRQL files (those with extension .gen) are written in a
syntax that extends Java with Abstract Syntax Trees (AST), AST data
constructors, and AST pattern matching, to make the construction of
the MRQL compiler easier. So the MRQL front-end is completely
written using this package GEN. These .gen files are translated to
plain Java by GEN. I would also need to write a roadmap that explains
the different modules, how they are interconnect, and which files one
needs to modify to add some new functionality. So I am thinking to
write a developer's wiki. This wiki will also explain how to code
using the GEN package.
4) Currently, I have the MRQL documentation in HTML format as part of
the codebase. I will probably need to move it to a wiki. Is there a
program or web site that converts HTML to wiki code automatically?
This will save me a lot of time.
Thank you for your help.
Leonidas Fegaras
