"...ending syndication feed confusion by supporting all of 'em. "

Content syndication with Project ROME by using ooRexx with BSF4ooRexx

LV-0902 - ao. Univ.Prof. Mag. Dr. Rony G. Flatscher Syndication

ROME

ooRexx

Martin Stoppacher Reg. No.:0650907

BSF4ooRexx

Programs

1

Agenda 1. 2. 2. 3.

Introduction Content Syndication Project ROME 2.1 2.2 3.1 3.2

4. 5. 6. 7. Syndication

API Java Programs

ooRexx

Introduction Examples

BSF4ooRexx ooRexx programs using BSF4ooRexx Demonstration Conclusion ROME

ooRexx

BSF4ooRexx

Programs

1. Introduction Content Syndication: - Specific type of XML - Distribution of information

Java:

- Platform independent programming language

Project ROME:

- Rss and atOm utilitiEs

- Syndication feed processing (JAVA API)

Open object Rexx: Syndication

ROME

ooRexx

- Interpreted programming language (extension: BSF4ooRexx) BSF4ooRexx

Programs

2. Content Syndication


Distribution of information




Information: summaries, recently added content ...




Advantages of web syndication

=> in the past B2B

- Millions of content providers, - No geographical barriers - Thousands of new distribution outlets - Eliminated entry barriers [BMcL02] Syndication

ROME

ooRexx

BSF4ooRexx

Programs

2. Content Syndication => Distribution through Syndication Feeds => Standardised XML Files => Different Standards (RSS, ATOM) and variants RSS 0.9, RSS 0.91, RSS 0.91, RSS 0.92, RSS 0.93, RSS 0.94, RSS 1.0, RSS 2.0, Atom 0.3, Atom 1.0 Syndication

ROME

ooRexx

BSF4ooRexx

Programs

2. Content Syndication Structure of: RSS 2.0 | ATOM 0.3 ... ...
Syndication

ROME

ooRexx











... ...

BSF4ooRexx

Programs

3. Project ROME


Java, Application Programming Interface, API




Packages:




3

com.sun.syndication.
feed.rss (1)
feed.atom (2)
feed.synd(3) Data-models:
io
module
feed

1) The RSS data model (abstract) 2) The Atom data model (abstract) 3) A format independent data model Syndication

ROME

ooRexx

BSF4ooRexx

Programs

3. Project ROME PR Snippets

-

Java

SyndFeedInput input = new
SyndFeedInput(); SyndFeed feed = input.build(new
XmlReader(feedUrl)); System.out.println(feed);










/*

same result as feed.toString(); */ SyndFeedOutput output = new
SyndFeedOutput(); output.output(feed, new
PrintWriter(System.out)); feed.setFeedType(“outputType”)

;

Syndication

ROME

ooRexx

BSF4ooRexx

Programs

3. Project ROME

1

Syndication

ROME

ooRexx

BSF4ooRexx

st

Programs

4. Open Object Rexx


Classic Rexx is a procedural language




OoRexx is fully compatible with Classic Rexx




OoRexx is fully object oriented

Classical Rexx approach: feedback = check_in(book)

/* function */

Open Object Rexx approach: feedback = book~check_in Syndication

ROME

ooRexx

/* method */ BSF4ooRexx

Programs

4. Open Object Rexx OoRexx features:











Syndication

ROME

ooRexx

Object orientation Class libraries Method chaining English like statements Fewer rules Interpreted not compiled Type less variables Clear error messages BSF4ooRexx

Programs

4. Open Object Rexx


Directives: define classes, methods, routines, …

::class ::method


::requires

::routine

Create a class instance:

feedback=book~new([arguments])


/*instance*/

Usage of Class libraries: Array , Bag , Directory , List => Syndication

BSF.cls class library of BSF4ooRexx ROME

ooRexx

BSF4ooRexx

Programs

4. Open Object Rexx OoRexx code snippet: parse arg
input





















value
=
.squared~new sqd
=
value~square(input) say
'The original value is:'
input
say 'The squared value is:'
sqd exit
0

































::class squared ::method 'square' use arg
in
return
(
in
*
in
)







[Fos05] Syndication

ROME

ooRexx

BSF4ooRexx

Programs

4. Open Object Rexx

2

Syndication

ROME

ooRexx

BSF4ooRexx

nd

Programs

5. BSF4ooRexx Bean Scripting Framework for ooRexx


Java support for ooRexx and vice versa




Based on Apache Jakarta BSF project (developed by IBM )

=> BSFManager


Features:

Syndication

=> BSFEngine (ooRexx specific)

BSF.cls

class library for the interfacing with Java preregistered objects BSF Registry ROME

ooRexx

BSF4ooRexx

Programs

5. BSF4ooRexx Example: MySQL DB connection: Java import
java.sql.*; public
class
mysql { public
static
void
main(String[]
args)
{

DriverManager.registerDriver( new
com.mysql.jdbc.Driver()); Connection conn = DriverManager.getConnection(url, url, pw); Statement stmt = conn.createStatement (); ResultSet rset = stmt.executeQuery("select NR, NAME from mytest");




rset.next())
{ System.out.print(rset.getString("nr")); Syndication

ROME

ooRexx

BSF4ooRexx

Programs

5. BSF4ooRexx Example: MySQL DB connection: ooRexx mydrive=.bsf~new('com.mysql.jdbc.Driver') man=bsf.loadClass("java.sql.DriverManager") man~registerDriver(mydrive) conn=man~getConnection(url,
uid,
pw) stmt=conn~createStatement rset=stmt~executeQuery("select NR, NAME from mytest") rset~next rset~getString("nr") Syndication

ROME

ooRexx

BSF4ooRexx

Programs

5. BSF4ooRexx

3

Syndication

ROME

ooRexx

BSF4ooRexx

rd

Programs

6. Programs


Using BSF4ooRexx to create programs with ROME




Example programs:




Application areas: News distribution, Reports,

Feed reader (parser), writer, aggregator, creator, … Wikis, Blogs, Trading software,Search engines, ...

Syndication

ROME

ooRexx

BSF4ooRexx

Programs

6. Programs OoRexx Snippets using the PR API javaclass
=
"FeedReader1" get=.bsf~new(javaClass) say
get~getfeed

Using a Java class Building an instance of a Java class

feedUrl=.bsf~new("java.net.URL",
url)
say
connecting__
||
feedUrl~getAuthority()
Parsing a Feed with Project ROME input=.bsf~new ("com.sun.syndication.io.SyndFeedInput") xmlr=.bsf~new ("com.sun.syndication.io.XmlReader”,feedUrl) feed=
input~build(xmlr)
Syndication

ROME

ooRexx

BSF4ooRexx

Programs

6. Programs Example of a FeedReader with a GUI Java AWT extension

Description retrieved from the Syndication Feed Syndication

ROME

ooRexx

BSF4ooRexx

Programs

6. Programs OoRexx Snippets using the PR API xmlr=.bsf~new ("org.xml.sax.InputSource",“/*URI String */”) feed~getUri()


























Different input sources feed~getAuthor()






SyndFeed methods feed~getDescription()



















feed~getEncoding()









Defines a Feed Type … (SyndFeed) feed~setFeedType("rss_2.0")
say
feed~getFeedType()
Syndication

ROME

ooRexx

BSF4ooRexx

Programs

6. Programs Example output of PR methods ~getTitle() ~getURI() ~getAuthor()

Syndication

ROME

ooRexx

BSF4ooRexx

Programs

6. Programs OoRexx Snippets using the PR API say
output~outputString(feed,1)





/* usage of pritty print(0 yes or 1 no) */ say
output~outputString(feed,1) WireFeedOutput, SyndFeedOutput writer=.bsf~new ("java.io.FileWriter",fileName) output=.bsf~new ("com.sun.syndication.io.SyndFeedOutput") output~output(feed,writer) Syndication

ROME

ooRexx

BSF4ooRexx

Programs

6. Programs Example of a graphical Feed Creator (JSwing)

Syndication

ROME

ooRexx

BSF4ooRexx

Programs

Demonstration

4

Syndication

ROME

ooRexx

BSF4ooRexx

th

Programs

Conclusion


PR => easy to use library for (Project ROME) syndication feed processing used for: News distribution, Reports, Wikis, Blogs, Trading software, Search engines, News collection, ...




OoRexx=> full usage of Java libraries via BSF4ooRexx - and therefore Project ROME




Feeds =>


Syndication

no more format confusion

“Code once run everywhere” ROME

ooRexx

BSF4ooRexx

Programs

Thank you

Syndication

ROME

ooRexx

BSF4ooRexx

Programs

References [ROME09]

Project ROME web resources; 2009; URL (2009-12-22) https://rome.dev.java.net/;

[ooR09]

About Open Object Rexx; Rexx Language Association; URL (2009-12-22) http://www.ooRexx.org/

[BSF4ooR]

BSF4ooRexx (Bean Scripting Framework for open object Rexx) 2009; URL (2009-12-22) http://wi.wu-wien.ac.at:8002/rgf/rexx/bsf4oorexx/current/

[Fos05]

REXX Programmer's Reference (Programmer to Programmer); Wrox; edition (März 2005); Author: Howard Fosdick; ISBN 0-13-780651-5;

[CoSh90]

The REXX Language: A Practical Approach to Programing; Prentice Hall PTR; 2nd edition (March 2, 1990); Author: M. F. Cowlishaw;

Syndication

ROME

2009;

ISBN-13: 978-0137806515; 1990;

ooRexx

BSF4ooRexx

Programs

References [Flat06]

Flatscher Rony G.: The Vienna Version of BSF4Rexx; “2006 International Rexx Symposium”, Austin, Texas; USA, April 2006; URL (2010-01-03) http://wi.wu.ac.at:8002/rgf/rexx/orx17/ 2006%5forx17%5fBSF%5fViennaEd%2epdf

[BMcL02]

Java und XML (Broschiert); O'Reilly/VVA; Edition (April 2002); Author: Brett McLaughlin; ISBN-13: 978-3897212800;

[Flat01]

Flatscher, Rony G.:Java Bean Scripting with Rexx; “12 International Rexx Symposium”, Raleigh, North Carolina; USA, April 30th – May 2nd , 2001; URL

Syndication

(2010-01-03) http://wi.wu.ac.at:8002/rgf/rexx/orx12/ JavaBeanScriptingWithRexx%5forx12%2epdf

ROME

ooRexx

BSF4ooRexx

Programs