Life of a java disciple

Tuesday, September 09, 2003

J2ME: Turning your phone into web Server.

I wrote a simple midlet which turns my Phone into simple web server. To keep the code simple, I removed the additional GPS capabilities. Currently the web server listens to port 8000 and repsonds "Hello, I am Kumar Mettu's Phone. Thanks for Visiting" for all requests that are sent to this tiny web server. Note that this code is tested only on Motorola i88s with Nextel Total Connect Service.

Here is the code for the tiny web server:

001 import java.io.IOException;

002 import java.io.InputStream;

003 import java.io.PrintStream;

004 

005 import javax.microedition.io.Connector;

006 import javax.microedition.io.StreamConnection;

007 import javax.microedition.io.StreamConnectionNotifier;

008 import javax.microedition.lcdui.Display;

009 import javax.microedition.midlet.MIDlet;

010 

011 /**

012  * MIDlet working as simple personal WebServer.

013  * Currently this serves simple HTTP GET operation.

014  *

015  * @author Kumar Mettu

016  * @version 0.61

017  */

018 

019 public class WebServer extends MIDlet {

020 

021     private Display display;

022 

023     StreamConnectionNotifier scn = null;

024 

025     /**

026      * Default constructor.

027      */

028     public WebServer() {

029        display = Display.getDisplay(this);

030     }

031 

032     /**

033      * This will be invoked when we start the MIDlet

034      */

035     public void startApp() {

036         try {

037             scn =(StreamConnectionNotifier)Connector.open("serversocket://:8000");

038             while (true) {

039                 StreamConnection sc = (StreamConnection)scn.acceptAndOpen();

040 

041                 // service the connection in a separate thread

042                 Connection c = new Connection(sc);

043                 c.start();

044             }

045 

046 

047         } catch (IOException e) {

048             //Handle Exceptions any other way you like.

049             //No-op

050         }

051     }

052 

053     /**

054      * Pause, discontinue ....

055      */

056     public void pauseApp() {

057         try {

058             if (scn != null)

059                 scn.close();

060         } catch(Exception e) {

061         }

062 

063     }

064 

065     /**

066      * Destroy. Cleanup everything.

067      */

068     public void destroyApp(boolean unconditional) {

069         try {

070             if (scn != null)

071                 scn.close();

072         } catch(Exception e) {

073         }

074     }

075 

076     /**

077      * Thread to handle client request.

078      */

079     class Connection extends Thread

080     {

081 

082         public Connection(StreamConnection c) {

083             client = c;

084         }

085 

086         /**

087          * Handles client request.

088          */

089         public void run() {

090             InputStream s = null;

091             PrintStream out = null;

092             StringBuffer b = new StringBuffer();

093             try {

094 

095                 s = client.openInputStream();

096 

097                  //Ignore reading request to reduce the amount of data

098                  //transfered to Phone.

099                 /*int ch;

100                 while((ch = s.read()) != -1) {

101                     b.append((char) ch);

102                 }

103                 System.out.println(b.toString());*/

104 

105                 out = new PrintStream(client.openOutputStream());

106                 String response =

107                              "&lt;HTML&gt;"+

108                              "&lt;HEAD&gt;"+

109                                 "&lt;TITLE>Kumar's Location&lt;/TITLE&gt;"+

110                              "&lt;/HEAD&gt;"+

111                              "&lt;BODY&gt;Hello, I am Kumar Mettu's Phone. "+

112                                      "Thanks for Visiting.&lt;/BODY&gt;"+

113                              "&lt;/HTML&gt;";

114                 out.println("HTTP/1.0 200 OK\n");

115                 out.println(response);

116 

117             }

118             catch (Throwable ioe) {

119                 //Handle Exceptions any other way you like.

120                 //No-op

121             }

122             finally {

123                 try {

124                     if (s != null)

125                         s.close();

126                     if (out != null)

127                         out.close();

128                     if (client != null)

129                         client.close();

130                 }

131                 catch (IOException ioee) {

132           //Handle Exceptions any other way you like.

133           //No-op

134                 }

135             }

136         }

137 

138         private StreamConnection client;

139     }

140 

141 }

142

I know there is no business value for this web server. But hey turning phone into a web server and viewing it serve web pages to browser is fun :-)

J2ME: My new J2ME-GPS phone

Since my old phone is more than 2 years old, I bought a new Motorola i88s phone which has J2ME and GPS support.
I added some cool J2ME applications which will probably be blogging about in coming days.

Monday, September 08, 2003

Molecular Expressions: Science, Optics and You - Powers Of 10: Interactive Java Tutorial

Molecular Expressions: Science, Optics and You - Powers Of 10: Interactive Java Tutorial: "View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons."

Thursday, September 04, 2003

StarOffice makes strong inroads in India

StarOffice makes strong inroads in India: "'In a scenario where enterprises are looking to bring down costs and increase productivity, StarOffice has emerged to be a viable option. In the last few months, StarOffice has gained substantial penetration into the Indian markets across segments like corporations, home users and government,' says K P Unnikrishnan, country head, marketing, Sun Microsystems India."

Wednesday, September 03, 2003

Send your prayer to GOD using SMS

Indians can send an SMS PUJA (prayer) to BPL and have the prayers recited for them at a popular Bombay temple, during the annual Ganesh Chaturthi festival. For just 51 rupees or $1.10, subscribers can avoid the hassle and aggravation of temple queues and text Ganesh instead.

Tuesday, September 02, 2003

Yahoo! News - Sun Mulls Joining Java Eclipse Effort

Yahoo! News - Sun Mulls Joining Java Eclipse Effort: "'Sun believes that Eclipse will hit a wall in terms of performance and compatibility because of distinctions between its NetBeans ... approach and Eclipse's ... approach, but at the moment, Eclipse is the clear leader,' said Stephen O'Grady, an analyst with RedMonk LLC, a market research company based in Bath, Maine."

Monday, September 01, 2003

Dear Mr Fleury stop spamming us

Unfortunately JBossGroup thinks none of the rules that applies to every enterpise applies to them. Its a minimum courtesy to have a link to "remove me" in news letters and marketing junk. Here is the latest mail sent by Marc F to what ever list he maintains:

Hello,

Just a quick one to cover August.

August was a great month for JBG, our best so far with record sales and
booming business. We will unveil the service partnership program soon.
On an interesting bit of news, JBoss made it #2 on the Computer Reseller
News as 'fastest growing certification in importance for large SI's'.

If you are in Europe and back from holiday, you may want to register for
the Stockholm training on September 8 (that is next week). Also let me
draw you attention to the OCT bootcamp in Amsterdam, you don't want to
miss that one. That is Oct 12.

Finally, there a number of events coming up where you can catch us.
http://www.jboss.org/index.html?module=html&op=userdisplay&id=news/event
s
You can catch Scott at the Web Services Edge West on Oct 1 and me in
Paris for the XML day on Oct 7, before the bootcamp on Oct 12, did we
say it was in Amsterdam?

All information is on our website at www.jboss.org and
www.jbossgroup.com

Regards

marcf

xxxxxxxxxxxxxxxxx
Marc Fleury, Ph.D
Founder
JBoss Group, LLC
xxxxxxxxxxxxxxxxx

_______________________________________________
jboss-news mailing list
jboss-news@mail.jboss.org
http://mail.jboss.org:8080/mailman/listinfo/jboss-news

The link http://mail.jboss.org:8080/mailman/listinfo/jboss-news gives server error:
HTTP Status 500 - No Context configured to process this request

Mark, next time u send your crap to us please provide a remove me link.

After publishing this on my blog, Fleury woke up and sent a mail to jboss-news with the subject "How to unsubscribe + quickie". Here are the full contents of his Email:

Folks,

Just a quickie to remind you that if you want to unsubscribe from this
list there should be directions at the bottom. We finally fixed the
port issues so you can unsubscribe by clicking below.

We just reconciled the lists and there are 40,000 entires on the list.
That is quite a bit of you that have subscribed to jboss-news. I am
looking forward to this out-reach mass channel as communication is
king.

Another quickie, we finished the services partners contracts and we
hope
to release soon. I also want to remind the europeans that we will be
in
amsterdam for bootcamp on Oct 11-12, you don't want to miss it,
register
soon.

Let me know if you encounter problems in the unsubscribe for those of
you going offline, we recently fixed a glitch that pointed to 8080
instead of the main port 80. It should work, let me know if it
doesn't.

Kind regards

marcf

xxxxxxxxxxxxxxxxx
Marc Fleury, Ph.D
Founder
JBoss Group, LLC
xxxxxxxxxxxxxxxxx

_______________________________________________
jboss-news mailing list
jboss-news@mail.jboss.org
http://mail.jboss.org/mailman/listinfo/jboss-news

I am just glad I didn't get a reply **** my **** from Marc. May be he is maturing.