Desu Venkateswara Rao: web-dvr

Visualize Maven Project Dependencies with dependency:tree and Dot Diagram Output

2012-01-25T13:03:00.001+05:30

Ref: http://java.dzone.com/articles/visualize-maven-project

The dependency:tree goal of the Maven plugin dependencysupports various graphical outputs from the version 2.4 up. This is how you would create a diagram showing all dependencies in the com.example group in the dot format:

Eclipse Search Replace variable param

2012-01-10T16:46:00.000+05:30

Inside Eclipse Search we can do operations like search and then replace, this is known to any one who is aware of eclipse dev tool.

Here I would like to know the concept of using part of input search param into replace content as a variable.

Some use cases are:

#1) Replace a method call 1 to call2 which have different params but have one or two common Same might be achieved using refactoring concept of eclipse as well but here I would like do with search and replace functionality of eclipse.

#2) Change the import package from one to new one like log4j replace with commons logging

How to do replace dynamic behaviour in #1 case

Lets say you have method called sendMMS which takes Message object as parameter and you want to change the method to sendMMSAndLog which will take two parameters one is Message object and other is file location.

i.e. the methods like sendMMS(msg) --> sendMMSAndLog(msg,filePath)In such case just search for sendMMS$(.*)$ and then in replace text give as below sendMMSAndLog($1,filePath)

This kind of behaviour is also available in jedit as well.

2011-11-29T01:04:00.001+05:30

Nice Java Framework to explore

called "PLAY"

Ref: http://www.playframework.org/

2011-11-29T00:35:00.001+05:30

Best way to start learning Java EE (OR) J2EE

Ref: http://www.sitepoint.com/java-6-steps-mvc-web-apps/

How to Get Unstuck

2011-10-18T16:46:00.002+05:30

Ref:http://java.dzone.com/articles/how-get-unstuck

Be a generalist: If you know only on thing and this doesn’t work you are stuck. If you know lots of ways you have lots of options to explore. It is less likely that all of them are blocked. Often it helps to think in terms of a different technology about a problem in order to get the idea that gets you unstuck.

Analyze precisely: More than once somebody asked me for assistance with a bug where the cause of the problem was nicely described in the call stack. So look exactly at the information you have (and the information you think you have). The first step is to actually read and understand error messages, stack traces and log files.

Ask for help: Work isn’t a competition. It’s team work. So ask a coworker to assist you. Often describing the problem to someone else is enough to solve the problem.

Know where to look for help: I’m quite surprised when people get stuck with a problem and I can solve it by asking google. Of course google is only the first step. For technical questions stackoverflow is a great source. Many libraries, frameworks and systems have their own specialized forums, mailing lists and wikis. Oh and don’t forget their bug trackers.

RTFM: I know it is boring to read documentation. But if you working with a technology every day you should read the main pieces of documentation. Yes I’m thinking of such interesting works like the Java Language Specification or Oracle Database Concepts or HTTP: The Definitive Guide.

Know whom to ask when your team mates can’t help: If you encounter someone who seems to be knowledgeable about a domain, make sure you have her email address available. And don’t be afraid to ask. Most people consider it a real nice compliment when somebody whom they only met once asks them a difficult technical question.

Use the source: A lot of the stuff we use today is open source. So when Hibernate doesn’t behave as you think it should or if Mockito does cool things which might be useful for your DSL, get the source code and get a look at it. If you don’t spend lots of time with it, you probably won’t really understand the source code, but often it will give you hints on what you might do to solve the problem.

Solve a different problem: Sometimes thinking about something else, taking a break and going for a work is all that it takes for a solution or at least a new idea to surface. Just make sure you have something to write with you.

What today's software developers need to know

2011-09-21T12:58:00.002+05:30

--

Ref: http://www.javaworld.com/javaworld/jw-09-2011/110915-modern-programming-skills.html

--

Don't Rewrite Your Application

2011-09-21T12:54:00.002+05:30

Ref: http://java.dzone.com/articles/dont-rewrite-your-application

When stuck with a legacy code base you’ll hear the claim “We’ll have to rewrite this from scratch in order to fix it!” It sounds promising. You start with a clean slate. You can do all the good stuff without all the mistakes. The only problem: It doesn’t work. Here is why.

What every you might think of the code base and the developers that created it: They weren’t stupid nor evil. So chances are the results of your work will look just as ugly in two years from now.
You don’t know the requirements: Part of the reason legacy code bases are ugly is that requirements change. There is no reason for you to assume this won’t stop.So chances are the results of your work will look just as ugly in two years from now.
You don’t have the time: As long as the rewrite isn’t done, you’ll need to maintain and probably evolve the current application. If it is of any importance, you can’t ignore it for the months to come. If you can you should do so without wasting your time with a rewrite.

Instead of rewriting the application refactor it. Learn to properly estimate the effort needed for implementing new features in a clean way. Add some time to make the code immediately around that new feature a little cleaner as well. Use that as estimate. This way the application will become a little cleaner with every update. Nobody needs to spend a huge lump of money without a good chance on a reasonable ROI. Instead you spend a little money and get what you paid for. The interesting effect of this approach is: The part of the code changed often will become cleaner fast. And nobody should be concerned to much with code that doesn’t change anyway.

If you can’t implement new features in a clean way I claim: You aren’t really able to implement the whole application in a clean way from scratch either.

There are only a few cases in which I’m willing to believe a rewrite is benefical:

Change of basis technology: Is the legacy code written in Cobol and you will loose the last machine running that? Is it a rich client and it must become an internet application? You might not have a choice.
Change of scope: Is 80% of code not needed anymore due to some changes in requirements? And you have to implement just as much for new features? You are doing a rewrite anyway.
Tiny application: When the rewrite is done end of the week, I guess it is Ok to do it. But I still recommend doing it using refactorings. It will teach you the technique for the next larger legacy application.
Somebody is willing to pay for the rewrite, but not for the effort needed to keep new code clean. It sounds extremely stupid to me, but I was told this happens …

From http://blog.schauderhaft.de/2011/02/20/dont-rewrite-your-application/

Oracle System Queries for Retrieving Oracle Database Object Information

2011-07-04T15:59:00.000+05:30

Oracle System Queries for Retrieving Oracle Database Object Information

Ref: http://www.razorsql.com/articles/oracle_system_queries.html

The following contains information on how to retrieve database information for Oracle objects such as tables, views, indexes, packages, procedures, functions, and triggers. The queries all query the Oracle system views located in the SYS schema.

Tables

This is a query to get all Oracle tables that can be viewed by the current user.

select TABLE_NAME, OWNER from SYS.ALL_TABLES order by OWNER, TABLE_NAME

The query can be filtered to return tables for a given schema by adding a where OWNER = 'some_schema' clause to the query.

Schemas

This is a query to get all Oracle schemas in an Oracle database instance.

select USERNAME from SYS.ALL_USERS order by USERNAME

Views

This is a query to get all Oracle views that can be viewed by the current user.

select VIEW_NAME, OWNER from SYS.ALL_VIEWS order by OWNER, VIEW_NAME

The query can be filtered to return views for a specific schema by adding a where OWNER = 'some_schema' clause to the query.

Packages

This is a query to get all Oracle packages that can be viewed by the current user.

select OBJECT_NAME, OWNER from SYS.ALL_OBJECTS where UPPER(OBJECT_TYPE) = 'PACKAGE' order by OWNER, OBJECT_NAME

To query for package bodies, substitute PACKAGE BODY for PACKAGE.

The query can be filtered to return packages for a specific schema by adding a where OWNER = 'some_schema' clause to the query.

Procedures

This is a query to get all Oracle procedures that can be viewed by the current user.

select OBJECT_NAME, OWNER from SYS.ALL_OBJECTS where upper(OBJECT_TYPE) = upper('PROCEDURE') order by OWNER, OBJECT_NAME

The query can be filtered to return procedures for a specific schema by adding a where OWNER = 'some_schema' clause to the query.

Procedure Columns

This is a query to get the columns in an Oracle procedure.

select OWNER, OBJECT_NAME, ARGUMENT_NAME, DATA_TYPE, IN_OUT from SYS.ALL_ARGUMENTS order by OWNER, OBJECT_NAME, SEQUENCE

Functions

This is a query to get all Oracle functions for the current user.

select OBJECT_NAME, OWNER from SYS.ALL_OBJECTS where upper(OBJECT_TYPE) = upper('FUNCTION') order by OWNER, OBJECT_NAME

The query can be filtered to return functions for a specific schema by adding a where OWNER = 'some_schema' clause to the query.

Triggers

This is a query to get all Oracle triggers for the current user.

select TRIGGER_NAME, OWNER from SYS.ALL_TRIGGERS order by OWNER, TRIGGER_NAME

The query can be filtered to return triggers for a specific schema by adding a where OWNER = 'some_schema' clause to the query.

Indexes

This is a query to get all Oracle indexes.

select INDEX_NAME, TABLE_NAME, TABLE_OWNER from SYS.ALL_INDEXES order by TABLE_OWNER, TABLE_NAME, INDEX_NAME

ORACLE SEQUENCE COLUMN BASED ON ORDER BY OF OTHER COLUMN

2011-06-28T18:50:00.002+05:30

Ref: http://forums.oracle.com/forums/thread.jspa?threadID=1026326

I have a table which is having lots of rows . I wish to update column (recno) with a sequential number from 1 to 75,000 order by mycolumn.

Nokia C3 Wifi Problem

2011-04-05T07:38:00.001+05:30

Ref: http://discussions.europe.nokia.com/t5/Connectivity/nokia-c3-wlan/td-p/711188

TO ANYONE EXPERIENCING THIS PROBLEM I HAVE FOUND A SOLUTION!!!!!

I have had this phone for a week and the WLAN has been very problematic!

To stop the phone from connecting to the GPRS instead of using the WLAN you must...

- Change all the settings to 'ASK FIRST', this includes the internet connection under connectivity and within the saved WLANS, each must have ask first selected.

- You must edit the packet data settings (under connectivity), it must say 'when needed' and then you must change the access point to a different point, e.g. Access point , then edit this access point, the alias can be anything (it is just a name), but the access point must be changed to the WLAN access point you are trying to connect to.

To find this access point code you must go to ...

Menu - settings - connectivity - WLAN - available wlans - then click edit on the WLAN you want to use. Look under 'Access point MAC', this should be a long list of numbers and letters separated by colons e.g. 1A:2B:3C:4D:5E:6E.

This works at home because you can save the WLAN and use the preferred access point, to make this work for 'hot spots' you will probably have to write down the access point code from the WLAN you want to use and create a new access point and change access points when you are using a different connection.

This works by saving specific access points to available WLAN locations.

If you need any more help or if this doesn't work for your C3 email me at c.bruinvels@tiscali.co.uk

Charlie

Password retrieval Websphere

2011-03-08T23:38:00.002+05:30

Ref:
WebSphere Password Decoder

Most of the times we cannot recall the database passwords configured in Websphere AS.
If you ever need to decode a password use the following tip.

Passwords are stored in resource.xml or security.xml in encoded (not encrypted) form.
To decode, WAS provides a class which does that.
java -classpath /deploytool/itp/plugins/com.ibm.websphere.v61_6.1.200/ws_runtime.jar com.ibm.ws.security.util.PasswordDecoder "{password with {xor}}"

For WAS versions 7 and more,
java -Djava.ext.dirs=/deploytool/itp/plugins/com.ibm.websphere.v7_7.0.1.v20090422_1423/wasJars/ -cp securityimpl.jar com.ibm.ws.security.util.PasswordDecoder "{password with {xor}}"

Remember that you need double quotes around password and it works only for older than 7.0 versions.

The Mysteries of Business Object

2011-02-27T17:25:00.004+05:30

Ref: http://javaboutique.internet.com/tutorials/businessObject/
The Mysteries of Business Object

Definition : Business Objects represent tangible entities within an application that the users create,access and manipulates while performing a Use Case. The Business Objects within a system are typically stateful, persistent and long-lived. Business Objects contain business data and models the business behavior.

How to Embed Existing Files into Open Office Text document

2011-01-29T13:28:00.002+05:30

There is a procedure to link the file in to Microsoft Office document as a Display Icon which is available at http://www.associatedcontent.com/article/321749/how_to_embed_existing_files_into_microsoft.html

Here I would like to explain how to do the same using OpenOffice.org suite

Step 1:

Click on the Insert section of tool bar and you will be able to an option with name Object. After clicking on Object you would be able to see OLE Object as further option and click on it.

Simply Insert --> Object--> OLE Object

Step 2:

Now a window opens something like below, then click on Further Objects and Click OK button.

Step 3: You are almost done after this step.

Now you have to select Create From File Option and then select the document to embed and click OK button.Same is show below. By now the file will be embedded in the sheet.

Finally the doc will look like below...

Thanks

.jrxml to .jasper and vice versa

2011-01-11T00:09:00.001+05:30

resources/ JrxmlB4ConvertToJasper.jrxml

<?xmlversion="1.0"encoding="UTF-8"?>

<jasperReportxmlns="http://jasperreports.sourceforge.net/jasperreports"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"

name="DBReport"language="java"pageWidth="595"pageHeight="842"

columnWidth="555"leftMargin="20"rightMargin="20"topMargin="20"

bottomMargin="20">

<propertyname="ireport.zoom"value="1.0"/>

<propertyname="ireport.x"value="0"/>

<propertyname="ireport.y"value="0"/>

<stylename="Serif"isDefault="true"fontName="Serif"fontSize="8"

isBold="false"isItalic="false"isUnderline="false"isStrikeThrough="false"

pdfFontName="Helvetica"pdfEncoding="Cp1252"isPdfEmbedded="false"/>

<fieldname="PARTNER_ID"class="java.lang.Integer">

</field>

<fieldname="PARTNER_NAME"class="java.lang.String">

</field>

<fieldname="EXT_PARTNER_ID"class="java.lang.String">

</field>

<fieldname="PARTNER_LIMIT"class="java.lang.Double">

</field>

<variablename="EXT_PARTNER_ID_VAR"class="java.lang.String">

</variable>

<groupname="MyGrp">

<bandheight="21"splitType="Stretch">

<reportElementx="0"y="0"width="100"height="20"

isRemoveLineWhenBlank="true"backcolor="#D4D0C8"/>

<textElementverticalAlignment="Middle">

<fontfontName="Serif"isBold="true"/>

</textElement>

</staticText>

<reportElementx="100"y="0"width="100"height="20"

isRemoveLineWhenBlank="true"backcolor="#D4D0C8"/>

<textElementverticalAlignment="Middle">

<fontfontName="Serif"isBold="true"/>

</textElement>

</staticText>

<reportElementx="200"y="0"width="100"height="20"

isRemoveLineWhenBlank="true"backcolor="#D4D0C8"/>

<textElementverticalAlignment="Middle">

<fontfontName="Serif"isBold="true"/>

</textElement>

</staticText>

<reportElementkey="REPORT_ELE_PARTNER_LIMIT"x="300"

y="0"width="100"height="20"isRemoveLineWhenBlank="true"

backcolor="#D4D0C8"/>

<textElementverticalAlignment="Middle">

<fontfontName="Serif"isBold="true"/>

</textElement>

</staticText>

</band>

</groupHeader>

<bandheight="21"splitType="Stretch">

<reportElementx="0"y="0"width="200"height="20"/>

<textElementtextAlignment="Center"verticalAlignment="Middle">

<fontfontName="Serif"/>

</textElement>

<textFieldExpressionclass="java.lang.String"><![CDATA[" <---> Group For :" + $V{EXT_PARTNER_ID_VAR}]]></textFieldExpression>

</textField>

</band>

<bandheight="21"splitType="Stretch">

<reportElementx="0"y="0"width="200"height="20"

isRemoveLineWhenBlank="false"/>

<textElementverticalAlignment="Middle"textAlignment="Center">

<fontfontName="Serif"/>

</textElement>

<textFieldExpressionclass="java.lang.String"><![CDATA["------------------------------------------------"]]></textFieldExpression>

</textField>

</band>

</groupFooter>

</group>

<bandheight="21"splitType="Stretch">

<reportElementx="0"y="0"width="100"height="20"

isRemoveLineWhenBlank="false"/>

<fontfontName="Serif"/>

</textElement>

<textFieldExpressionclass="java.lang.Integer"><![CDATA[$F{PARTNER_ID}]]></textFieldExpression>

</textField>

<reportElementx="100"y="0"width="100"height="20"

isRemoveLineWhenBlank="false"/>

<fontfontName="Serif"/>

</textElement>

<textFieldExpressionclass="java.lang.String"><![CDATA[$F{PARTNER_NAME}]]></textFieldExpression>

</textField>

<reportElementx="200"y="0"width="100"height="20"

isRemoveLineWhenBlank="false"/>

<fontfontName="Serif"/>

</textElement>

<textFieldExpressionclass="java.lang.String"><![CDATA[$F{EXT_PARTNER_ID}]]></textFieldExpression>

</textField>

<reportElementx="300"y="0"width="100"height="20"

isRemoveLineWhenBlank="false"/>

<fontfontName="Serif"/>

</textElement>

<textFieldExpressionclass="java.lang.Double"><![CDATA[$F{PARTNER_LIMIT}]]></textFieldExpression>

</textField>

</band>

</detail>

</ jasperReport >

JrxmlToJasper .java

importnet.sf.jasperreports.engine.JRException;

importnet.sf.jasperreports.engine.JasperCompileManager;

importnet.sf.jasperreports.engine.design.JasperDesign;

importnet.sf.jasperreports.engine.xml.JRXmlLoader;

publicclassJrxmlToJasper {

publicstaticvoidmain(String[] args) {

try{

String desinationPath ="resources/JasperArConvertFromJrxml.jasper";

JasperDesign jasperDesign = JRXmlLoader.load("resources/JrxmlB4ConvertToJasper.jrxml");

JasperCompileManager. compileReportToFile(jasperDesign, desinationPath);

}catch(JRException e) {

//TODOAuto-generated catch block

e.printStackTrace();

}

The above code take the JrxmlArConvertFromJasper.jrxml as input and prepare the JasperArConvertFromJrxml.jasper shown below

resources/ JasperArConvertFromJrxml.jasper

¬Íjava/lang/Double Ï
evaluateOld
getOldValue

and something like that …. ....................... }

Now we can convert the above .jasper to .jrxml as below

JasperToJrxml .java

importnet.sf.jasperreports.engine.JRException;

importnet.sf.jasperreports.engine.JasperReport;

importnet.sf.jasperreports.engine.util.JRLoader;

importnet.sf.jasperreports.engine.xml.JRXmlWriter;

publicclassJasperToJrxml {

publicstaticvoidmain(String[] args) {

String sourcePath ="resources/JasperArConvertFromJrxml.jasper";

String destinationPath ="resources/JrxmlArConvertFromJasper.jrxml";

try{

JasperReport report = (JasperReport) JRLoader

. loadObject(sourcePath);

JRXmlWriter.writeReport(report, destinationPath,"UTF-8");

}catch(JRException e) {

e.printStackTrace();

}

What is difference between Bug Priority and Severity

2011-01-02T22:11:00.002+05:30

Prority : Urgency Of the Bug (Or) Order to fix the bug
Severity : Impact of the Bug (Or) Complexity/criticality of the bug

Colurs to use in presentation

2010-12-21T23:43:00.003+05:30

Ref: http://office.microsoft.com/en-us/powerpoint-help/choose-the-right-colors-for-your-powerpoint-presentation-HA001012072.aspx

Transaction Processing books

2010-12-21T23:31:00.001+05:30

http://books.google.com/books?id=G-e7tvWJxZoC&lpg=PP1&dq=transaction%20processing%20system%20examples&pg=PP1#v=onepage&q=transaction%20processing%20system%20examples&f=true

http://books.google.com/books?id=S_yHERPRZScC&lpg=PP1&dq=transaction%20processing%20system%20examples&pg=PR7#v=onepage&q=transaction%20processing%20system%20examples&f=false

Open Office Macro Row Compare

2010-12-20T22:44:00.002+05:30

Sub SelectedTextAsASCII ()
vSelection = ThisComponent. CurrentSelection
oSelect = ThisComponent. CurrentSelection . getRangeAddress
oSelectColumn = ThisComponent. CurrentSelection . Columns
oSelectRow = ThisComponent. CurrentSelection . Rows

CountColumn = oSelectColumn. getCount
CountRow = oSelectRow. getCount

oSelectSC = oSelectColumn. getByIndex ( 0 ) . getName
oSelectEC = oSelectColumn. getByIndex ( CountColumn -1 ) . getName

oSelectSR = oSelect. StartRow +1
oSelectER = oSelect. EndRow +1
NoCell = ( CountColumn * CountRow )

If CountColumn = 1 AND CountRow = 1 Then
MsgBox ( "Cell " + oSelectSC + oSelectSR + chr ( 13 ) + "Cell No = " + NoCell,, "SelectedCells" )
Else
MsgBox ( "Range(" + oSelectSC + oSelectSR + ":" + oSelectEC + oSelectER + ")" + chr ( 13 ) + "Cell No = " + NoCell,, "SelectedCells" )
End If
colorArray = Array ( RGB ( 215 , 111 , 6 ) , RGB ( 255 , 141 , 36 ) , RGB ( 155 , 171 , 66 ) , RGB ( 215 , 201 , 96 ) , RGB ( 255 , 231 , 126 ))
colorAraySize = UBound ( colorArray ) -1

For i = 0 To CountColumn -1
For j = 0 To CountRow -2
vSel = vSelection. GetCellbyPosition ( i,j )
vNext = vSelection. GetCellbyPosition ( i,j +1 )
s = vSel. getString ()
s2 = vNext. getString ()
If Len ( s ) > 0 AND Len ( s2 ) > 0 Then
'Print s, s2, "(" ,i, "," ,j, ")" , "(" ,i, "," , ( j +1 ) , ") Comp result" , StrComp ( s, s2 )
If StrComp ( s, s2 ) <> 0 Then
vNext. CellBackColor = colorArray (( j Mod colorAraySize ))
Else
vSel. CellBackColor = RGB ( 255 , 255 , 255 )
End If
Else
' Print "Nothing is selected"
End If
Next
Next
End Sub

Success as technical lead

2010-11-30T00:44:00.000+05:30

Ref: http://littletutorials.com/2008/07/07/success-as-technical-lead/

Double Brace Initialization

2010-11-18T22:26:00.001+05:30

Ref:
http://www.c2.com/cgi/wiki?DoubleBraceInitialization

--
--

SVN add for all un-added files

2010-11-12T00:25:00.001+05:30

SVN add for all un-added files

Windows equivalent commands in Linux

2010-10-31T23:34:00.003+05:30

To achieve the functionality avail in windows Commands and not in Linux, one can use mtools(Available with Linux).

Here are some examples:

mattrib The DOS attrib command, which is used to change an MSDOS file attribute flag.
mbadblocks The DOS badblocks command, which tests a floppy disk and marks any bad blocks contained on the floppy in its FAT.
mcd The DOS cd command, which is used to change the working directory to another DOS directory. (The default directory is A:\) that is used by other mtools.
mcheck The DOS check command, which is used to verify a file.
mcopy The DOS copy command, which is used to copy files from one location to another.

The above green one is found to be useful as in Windows it have some features that are not there in Linux.

In some Linux systems if you got command not found...The nlogin as root and install mtools package(yum install mtools).

clone root account linux

2010-10-31T16:35:00.002+05:30

-

Ref: http://configuration-guide.com/clone-root-account-linux/
http://www.labtestproject.com/create_root_user_account

--

Blogs I like on JVM (Java)

2010-10-24T12:53:00.002+05:30

Ref:

Know the JVM Series – 1 – The Uncaught Exception Handler

Know the JVM Series: Shutdown Hooks

VPNC run as regular user

2010-10-23T19:57:00.000+05:30

http://femto.cs.illinois.edu/~sbond/vpnc/

Compare RAW data type in ORACLE

2010-10-05T16:20:00.007+05:30

The query is for ORACLE only.

How to do compare operations on the saved RAW data type.

Lets say
the Table Name is : XYZ_TBL
the columns are
: XYZ_ID (Number Primary Key)
: XYZ_RAW_DATA (Raw )

SELECT RAWTOHEX(XYZ_RAW_DATA) FROM XYZ_TBL WHERE XYZ_ID =1;

Lets say the result is 759576F461C3763B1E0169EDEC26341E

Then

SELECT XYZ_ID FROM XYZ_TBL WHERE XYZ_RAW_DATA = HEXTORAW('759576F461C3763B1E0169EDEC26341E');

will be able to give result XYZ_ID =1

--

Practical Software Design - A few thoughts!

2010-10-02T16:33:00.001+05:30

Practical Software Design - A few thoughts!

Diagnosing classpath problems

2010-09-30T23:28:00.004+05:30

Class.forName().getProtectionDomain().getCodeSource();

Ref : http://www.ibm.com/developerworks/websphere/techjournal/0406_brown/0406_brown.html

--

no-more-demo-code

2010-09-10T00:44:00.000+05:30

http://java.dzone.com/articles/no-more-demo-code

using java reflection implement an absolutely generic dao and make legacy db integration smoothly

2010-09-06T18:18:00.000+05:30

Ref : http://fdimarco.wordpress.com/2010/07/23/using-java-reflection-to-implement-an-absolutely-generic-dao-and-make-legacy-db-integration-smoothly/

Is Oracle Right to Sue Google ( I feel Right). Save Java from fragmentation)

2010-09-05T20:11:00.004+05:30

Google has already start fragmenting the opensource friendly browser userbase with their own Chrome browser.

They are doing the same tactics with New Java variant(Android, atleast the way the program and library looks like Java)

I like the following article and you might also...
http://www.pcworld.com/article/204419-2/why_oracle_is_right_to_sue_google.html

It might hurt someone, they can freely comment on it here(Actually I like to see those comments)...

Run Multiple instances of Firefox

2010-09-05T14:49:00.003+05:30

For Linux:
Got to your home directory [ cd ]
Type following [ vi firefox]
Paste the following content
[
export MOZ_NO_REMOTE=1
firefox -P
export MOZ_NO_REMOTE=0
]
Now type firefox & thats all.

Pre Requisite: Need to have more than one profile to work (As same profile can't be used between two instances)

In Windows:
Create a batch file firefox.bat on your desktop and open the file with notepad and paste the following content and save it . Now onwards use the firefox.bat file to open more than one instance of firefox.
[
@echo off
set MOZ_NO_REMOTE=1
start "" "C:\Program Files\Mozilla Firefox\firefox.exe" -p
set MOZ_NO_REMOTE=0
]

File copy in java observations

2010-08-04T09:53:00.001+05:30

Ref: http://www.baptiste-wicht.com/2010/08/file-copy-in-java-benchmark/

1. Naive Streams Copy : Open two streams, one to read, one to write and transfer the content byte by byte.
2. Naive Readers Copy : Open two readers, one to read, one to write and transfer the content character by character.
3. Buffered Streams Copy : Same as the first but using buffered streams instead of simple streams.
4. Buffered Readers Copy : Same as the second but using buffered readers instead of simple readers.
5. Custom Buffer Stream Copy : Same as the first but reading the file not byte by byte but using a simple byte array as buffer.
6. Custom Buffer Reader Copy : Same as the fifth but using a Reader instead of a stream.
7. Custom Buffer Buffered Stream Copy : Same as the fifth but using buffered streams.
8. Custom Buffer Buffered Reader Copy : Same as the sixth but using buffered readers.
9. NIO Buffer Copy : Using NIO Channel and using a ByteBuffer to make the transfer.
10. NIO Transfer Copy : Using NIO Channel and direct transfer from one channel to other.

Conclusion:

In conclusion, the NIO Transfer method is the best one for big files but it’s not the fastest for little files (< 5 MB). But the custom buffer strategy (and the NIO Buffer too) are also really fast methods to take files. So perhaps, the best method is a method that make a custom buffer strategy on the little files and a NIO Transfer on the big ones. But it will be interesting to also make the tests on an other computer and operating system.

We can take several rules from this benchmark :

1. Never made a copy of file byte by byte (or char by char)
2. Prefer a buffer in your side more than in the stream to make less invocations of the read method, but don’t forget the buffer in the side of the streams
3. Pay attention to the size of the buffers
4. Don’t use char conversion if you only need to tranfer the content of a file
5. Don’t hesitate to use channels to make file transfer, it’s the fastest way to make a file transfer

Stateful And Sateless thoughts I like

2010-08-04T00:48:00.002+05:30

Comment by :Ronald Miura
Ref: http://java.dzone.com/articles/why-stateful-and-local-anti

Applications have state, this is a fact. Where and how you hold this state is the problem.

If you try to make things completely 'stateless', you end up keeping state in hidden fields, which introduces all sorts of security problems.

If you just make everything stateful without much consideration, you make it hard to understand the code. Even if the code itself is clean (fewer lines), you can't know for sure what it does, because you can't make safe assumptions about the state (you introduce a 'time' variable into the equation). Contrast this with a (purely stateless) function, which takes some parameters, and return a value, and everything between is relative to the parameters passed. No concurrency, no stale state.

The combination I like most is, keeping the state within the UI (the state is always relative to the user interactions anyway), and keep my business code stateless. 'Rules' shouldn't have state, at least not user interaction-related state, only business-related state (which is held in the database, not in instance variables).

Simplicity is not about less code. Code that is easy to read is simple. Code that is easy to understand is simple. Simplicity is not necessarily in fewer lines of code, even if it looks simpler.

java Time zone as offsets from UTC/GMT

2010-08-01T00:39:00.002+05:30

public class DateFormatters {
public static String timeZoneIdToGMTOffset ( String tzId ){
String myUTCoffset = "GMT" ;
long offsetMillis = TimeZone. getTimeZone (tzId ). getRawOffset ();
long offsetSecs = Math. abs (offsetMillis / 1000 );
long offsetMins = offsetSecs / 60 ;
long hhFormat = offsetMins / 60 ;
long mmFormat = offsetMins % 60 ;
myUTCoffset += ((offsetMillis < 0 ? "-" : "+" )+ (hhFormat > 9 ?hhFormat : "0" +hhFormat )+ ":" +(mmFormat > 9 ?mmFormat : "0" +mmFormat ));
System. out. println (myUTCoffset );
return myUTCoffset ;
}
}
public class Test {
public static void main ( String [] args ) {
String [] tzIDs = new String []{ "Asia/Calcutta", "America/New_York", "America/Chicago" };
for ( int i = 0 ; i < tzIDs. length ; i ++) {
DateFormatters. timeZoneIdToGMTOffset (tzIDs [i ]);
}
}

}

Simple Pluggable java Applicaion

2010-07-23T01:17:00.000+05:30

http://solitarygeek.com/java/a-simple-pluggable-java-application

Backward Compatability Challenges Java

2010-07-23T00:52:00.001+05:30

Follow the link : http://www.javalobby.org/java/forums/t88549.html

Preview content:

The problem starts when someone files a bug that isn't really fixable without breaking something else. This bug in GridBagLayout is such a problem. It's not the mother of all bugs (so holster that flame thrower) but it serves well for highlighting the problem. This bug is about GridBagLayout is collapsing all Components to their minimum size if they can't be given at least their preferred size (in either dimension) even if there is only one pixel missing. There was a fix committed, but it was shown that it would break some old code, so the fix was removed.
This really put the finger on the problem. If there is a bug introduced in say JDK 1.3, and it isn't dealt with until 1.4, you will still suffer from it in 6.0 since it can't be fixed without breaking old code. But your code is for 6.0 and you want that fix! Say hello to the Compatibility API.

java object initialization

2010-07-22T00:30:00.000+05:30

http://java.dzone.com/articles/java-object-initialization

Mathematical Functions

2010-07-18T01:15:00.001+05:30

http://www.analyzemath.com/precalculus.html

How to be a worse programmer

2010-07-08T23:24:00.000+05:30

Ref: How to be a worse programmer

Linux: How to clear the cache from memory

2010-06-03T16:32:00.002+05:30

Ref: http://www.scottklarr.com/topic/134/linux-how-to-clear-the-cache-from-memory/

Nicely written examples for XML parse in Java

2010-05-22T22:19:00.004+05:30

Ref: http://www.totheriver.com/learn/xml/xmltutorial.html

Sort And Search Algorithm

2010-05-20T12:08:00.002+05:30

Ref: http://sites.google.com/site/iamdvr/Home/books/sort-search

Algorithms

2010-05-19T10:27:00.009+05:30

Given an array find any pair that sums up into a number

Using Stack as Queue

How to build and populate a tree

http://www.glassdoor.com/Interview/randomize-an-array-QTN_84363.htm

http://www.glassdoor.com/Interview/Write-an-efficient-method-to-reverse-a-string-QTN_84051.htm

http://www.glassdoor.com/Interview/Given-the-pre-order-and-in-order-traversing-result-of-a-binary-tree-write-a-function-to-rebuild-the-tree-QTN_80159.htm

http://www.glassdoor.com/Interview/Give-you-a-random-number-generator-which-generates-0-and-1-in-arbitary-probability-Using-this-random-number-generater-pl-QTN_76302.htm

One more: Testing a sequence of characters to determine if it is a palindrome (i.e., reads the same forward and backward, like "radar") can be accomplished easily with one stack and one queue. The solution is to enter the sequence of characters into both data structures, then remove letters from each data structure one at a time and compare them, making sure that the letters match.

http://www.glassdoor.com/Interview/algorithm-interview-questions-SRCH_KT0,9.htm

Debug Websphere or Java EE server using eclipse

2010-05-17T11:08:00.002+05:30

Here is the link that has the steps to attach remote java process to eclipse and debug the the code from eclipse.

Ref: http://www.jacoozi.com/index.php?option=com_content&task=view&id=119&Itemid=134

Basically the debugger port need to be configured properly.

CVS tag/branch creation/modification

2010-05-12T18:56:00.005+05:30

Lets say I have a module called my_module

Checkout the module:
cvs co my_module

Create Tag with name 'TAG_INITIAL':
cvs tag -c TAG_INITIAL my_module


Create Branch with name 'BRANCH_INITIAL':
cvs tag -r TAG_INITIAL -b BRANCH_INITIAL my_module

Modify Tag name from 'TAG_INITIAL' to 'TAG_MODIFIED':
It involves two steps
Step1: Create a new tag from using the old tag name
cvs rtag -r TAG_INITIAL TAG_MODIFIED my_module

Step2: Delete the old tag name
cvs rtag -d TAG_INITIAL my_module


Modify Branch name from 'BRANCH_INITIAL' to 'BRANCH_MODIFIED':
It involves two steps
Step1: Create a new branch from using the old branch name
cvs admin -n BRANCH_MODIFIED:BRANCH_INITIAL my_module

Step2: Delete the old branch name
cvs admin -n BRANCH_INITIAL my_module

Refresh File Tag to some other version:
Lets say we have a tag TAG_MODIFIED and a file version used in that tag has to be moved from 1.2 to 1.4 then the command will be like below:
cvs tag -r 1.4 -F TAG_INITIAL TAG_MODIFIED myFile.txt

Refresh File Tag to trunk:
Lets say we have a tag TAG_MODIFIED and a file version used in that tag has to be moved from 1.2 to latest in trunk then the command will be like below:
cvs tag -F TAG_INITIAL TAG_MODIFIED myFile.txt

something for Reference: http://kb.wisc.edu/middleware/page.php?id=4087

I pulled this information by surfing various sites. Thanks to those all.

Linux: File full path

2010-05-12T14:49:00.003+05:30

Way 1:
ls |xargs -i echo $PWD/{}

Way 2:
ls -l --color=auto -d $PWD/*

OR ls -a --color=auto -d $PWD/*

Joshua Bloch: Bumper-Sticker API Design -- Design a Good API & Why it Matters

2010-05-02T13:55:00.000+05:30

How to Design a Good API & Why it Matters. Follow the link
http://www.infoq.com/articles/API-Design-Joshua-Bloch

Concerns on spring Framework

2010-05-02T13:42:00.001+05:30

To find some of the criticism/Concerns of Spring framework. Please follow the link.

http://www.web4j.com/Criticisms_Drawbacks_Pitfalls_Spring_Rails_PHP.jsp

All about Life

2010-05-02T13:41:00.000+05:30

Written by a 90 year old.

This is something we should all read at least once a week!!!!! Make sure you read to the end!!!!!!

Written By Regina Brett, 90 years old, of The Plain Dealer, Cleveland, Ohio.

"To celebrate growing older, I once wrote the 45 lessons life taught me. It is the most-requested column I've ever written.

My odometer rolled over to 90 in August, so here is the column once more:

1. Life isn't fair, but it's still good.

2. When in doubt, just take the next small step.

3. Life is too short to waste time hating anyone.

4. Your job won't take care of you when you are sick. Your friends and parents will. Stay in touch.

5. Pay off your credit cards every month.

6. You don't have to win every argument. Agree to disagree.

7. Cry with someone. It's more healing than crying alone.

8. It's OK to get angry with God. He can take it.

9. Save for retirement starting with your first paycheck.

10. When it comes to chocolate, resistance is futile.

11. Make peace with your past so it won't screw up the present.

12. It's OK to let your children see you cry.

13. Don't compare your life to others. You have no idea what their journey is all about.

14. If a relationship has to be a secret, you shouldn't be in it.

15. Everything can change in the blink of an eye. But don't worry; God never blinks.

16.. Take a deep breath. It calms the mind.

17. Get rid of anything that isn't useful, beautiful or joyful.

18. Whatever doesn't kill you really does make you stronger.

19. It's never too late to have a happy childhood. But the second one is up to you and no one else

20. When it comes to going after what you love in life, don't take no for an answer.

21. Burn the candles, use the nice sheets, wear the fancy lingerie. Don't save it for a special occasion. Today is special.

22. Over prepare, then go with the flow.

23. Be eccentric now. Don't wait for old age to wear purple.

24. The most important sex organ is the brain.

25. No one is in charge of your happiness but you.

26. Frame every so-called disaster with these words 'In five years, will this matter?'

27. Always choose life.

28. Forgive everyone everything.

29. What other people think of you is none of your business.

30. Time heals almost everything. Give time time.

31. However good or bad a situation is, it will change.

32. Don't take yourself so seriously. No one else does.

33. Believe in miracles.

34. God loves you because of who God is, not because of anything you did or didn't do.

35. Don't audit life. Show up and make the most of it now.

36. Growing old beats the alternative -- dying young.

37. Your children get only one childhood.

38. All that truly matters in the end is that you loved.

39. Get outside every day. Miracles are waiting everywhere.

40. If we all threw our problems in a pile and saw everyone else's, we'd grab ours back.

41. Envy is a waste of time. You already have all you need.

42. The best is yet to come...

43. No matter how you feel, get up, dress up and show up.

44. Yield.

45. Life isn't tied with a bow, but it's still a gift."

What makes a good software architecture?

2010-04-03T16:43:00.000+05:30

Link http://www.hasith.net/2009/01/untitled.html

spring silver bullet use case

2010-04-03T16:38:00.002+05:30

Link http://www.hasith.net/2009/11/spring-silver-bullet.html

Enterprise Java Application Plugin - Jar reload

2010-04-02T19:34:00.002+05:30

Here is a link that has more info http://www.techjava.de/topics/2008/02/plugin-class-loader/

Style of Increasing focus on work

2010-03-21T16:50:00.001+05:30

Playing around with productivity apps is just another way to procrastinate.

You become more productive by getting into the habit of doing actual work regularly, not by constantly thinking about how you can get more work done.

Ref: http://howtogetfocused.com/chapters/how-software-engineers-and-designers-can-increase-their-focus/

Reloading Java Classes Series

2010-03-11T22:52:00.001+05:30

Reloading Java Classes Series

Open Office Code or Script Format

2010-03-11T12:10:00.002+05:30

This is for Open Office users only.

Sometimes we are supposed to have the some code or script snippet to be colored or formatted in documents. This can be acheived in Open Office using the extension named COOoder.

Link: http://extensions.services.openoffice.org/en/project/coooder

Is Strong Typing Really Needed?

2010-03-07T23:53:00.000+05:30

http://java.dzone.com/articles/strong-typing-really-needed?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+javalobby%2Ffrontpage+%28Javalobby+%2F+Java+Zone%29

Publish blogs from Open Office

2010-03-01T09:35:00.004+05:30

One can publish the blogs to blogger.com using Sun Weblog Publisher extension of Open Office. Its quite simple to use. Just write whatever you want in OpenOffice Text document and File ->Send To->Web Log

About Open Office: http://openoffice.org/
Get Open Office: http://download.openoffice.org/index.html
For Weblog Publisher extension: http://extensions.services.openoffice.org/en/project/swp

Stateful Session Bean

2010-03-01T09:14:00.001+05:30

Ref:http://onjava.com/pub/a/onjava/2001/10/02/ejb.html

Stateful Session EJBs: Beasts of Burden

I don't dislike what they offer to developers. Rather, I dislike their conniving, misleading, and subtle nature that permits developers to make some of the worst architecture decisions I've seen. SFSBs have a very limited use in development and should rarely be seen. But somehow, these infiltrating creatures have wormed their way into designs where they do not belong. This article discusses the true purpose of SFSBs, where they belong in a J2EE design, and the situations where they should not be used. Heed this advice and perhaps we can harness the beast to create more robust architectures instead of creating more burdens by using SFSBs incorrectly.

The intent of Stateful Session EJBs

An Stateful Session EJB is a server-side object designed to hold data on behalf of a particular client. SFSBs should be used to store session-oriented data. Session-oriented data is used to track a multi-request sequence, ordering, or any associated data that is part of a sequence. SFSBs, however, have a limited lifespan and are not intended to survive server crashes. SFSBs are the only type of EJB that can receive callback notifications about the lifecycle of transactions that the bean participates in.

When SFSBs should not be used

S FSBs are not server-side data caches. Yes, they do hold data in the server on behalf of the client, but that does not make them an in-memory, persistent store data cache. Yes, SFSBs are allowed to access a database and load data into memory, but the act of cacheing persistent data lies within the responsibilities of entity beans. A primary requirement for a data cache is that multiple clients should be able to access the same data concurrently based upon locking rules dictated by the developer. SFSBs are not designed to be shared resources to intuitively allow for this type of concurrent access. In the EJB 1.1 specification, concurrent client access of SFSBs was strictly prohibited. In EJB 2.0, a container vendor's implementation may permit concurrent client access of a single SFSB. Despite this new capability in EJB 2.0, SFSBs should not be used in a design that calls for multiple client concurrent access because they make it easy for a developer to code a deadlock.
The only data that should be cached within an SFSB is data pertaining to tracking the sequence that the SFSB is managing. I've seen too many clients take 30 minutes to build an SFSB with persistent data and then spend 30 days trying to architect a solution that converts the bean into a transaction-aware data cache. Just don't do it -- you are setting yourself up for guaranteed failure.
Part of this misperception about SFSBs comes from the wording within the EJB specification itself! The EJB specification suggests that a shopping cart for an e-commerce system could be implemented with SFSBs. This is perfectly acceptable if that shopping cart is only intended to be an in-memory implementation that does not need to survive a server crash. In reality, however, most implementations of shopping carts are required to survive server crashes; the data contained within the shopping cart needs to be persistent and transactional -- with an in-memory data cache.
Developers may be confused because if you read the EJB specification incorrectly it could be interpreted as saying all shopping cart implementations can be implemented with SFSBs. That simply isn't true. All in-memory shopping cart implementations can be implemented with SFSBs, but if you need to implement a persistent, crash-friendly shopping cart, you need to use entity EJBs.
SFSBs are not distributed data stores. Yes, many application servers provide SFSB replication of state to allow for failover of requests to provide a higher level of availability. SFSB replication is just that: a replication mechanism to resist failures of instances on a single machine. SFSB replication is not designed to resist cluster-wide failures nor is it designed to cache data across an entire cluster. If a cluster has SFSB replication and all of the servers hosting a particular SFSB crash, that SFSB is permanently lost. This will happen, even if there are other servers that are still active. This is perfectly acceptable and should be accounted for when using SFSBs. If an SFSB is only used as a session-oriented component, the worst-case scenario that occurs is that the sequence is restarted from scratch when all copies of a particular SFSB are destroyed.

When SFSBs should be used in non-web systems

For systems that do not have a servlet/JSP front-end, SFSBs should be used to track session-oriented state similar to the way a web-based system would use an `HttpSession` object. This was the primary intent of SFSBs when they were created.

When SFSBs should be used in web systems

Systems that have JSP/servlet front-ends should use `HttpSession` objects to store session-oriented state on behalf of a client. Applications that manage an `HttpSession` object and an SFSB for a single client wind up duplicating effort that does not need to be duplicated. There are two reasons to use an SFSB in conjunction with an `HttpSession` object:

Your application server does not provide cache management of HttpSession instances and your system is expected to have a large number of concurrent clients. Containers for SFSBs can activate and "passivate" the state of instances to and from a secondary store. This allows a container to create an upper limit to the number of instances that will exist in memory at any given point in time. The number of concurrent clients can exceed the limit of SFSB instances in memory because the container can swap idle instances to and from the secondary store. The container will never allow more than the limit of SFSB instances to exist in memory, subsequently placing all additional instances into the secondary store. This provides a greater level of scalability to the system through effective memory management.
Many application servers provide similar cache management of HttpSession objects. Because HttpSession objects are similar to SFSBs, they can also be made passive and active. Cache management behavior of HttpSession objects is not required as part of J2EE and is considered a vendor value-add. If your application server does not support HttpSessioncache management -- and you need to control the total number of session-oriented instances in memory at any given time -- you should place the bulk of your session-oriented data in an SFSB instead of an HttpSession object. You will still need to maintain an HttpSession for each client, but the only item in the HttpSession should be a reference to the SFSB for that client. If the only item in the HttpSession object is a reference to the SFSB, the amount of memory consumed by each HttpSession object is minimal and cache management of these instances is not needed. The bulk of memory consumption will occur within the SFSBs, which have a standardized strategy for allowing a container to perform cache management.
Your session-oriented objects need to receive notifications on the lifecycle of the transactions they participate in. SFSBs can implement the SessionSynchronization interface. TheSessionSynchronization interface contains three methods that a container invokes as a transaction migrates through the lifecycle the SFSB is participating in. An SFSB might implement the SessionSynchronization interface as a way to return the data of the SFSB to its original state whenever there is a transaction rollback. HttpSession instances do not have a mechanism that allows them to receive transaction notifications. This means that any data that is modified in an HttpSession during a transaction will not be reverted if the current transaction is rolled back. All changes to data in an HttpSession object are always durable despite the outcome of any executing transactions. If this behavior is not appropriate for your system, placing all data into an SFSB instance that implements SessionSynchronization will give you the appropriate behavior.

Conclusion

SFSBs have their place in J2EE systems; it's just very small. If your designs use SFSBs for session-oriented data and avoid using SFSBs as distributed data caches, your systems will be more reliable. If you have a requirement you think SFSBs can satisfy and that requirement is not listed in this article, you should give some hard thought to another solution.

Java dynamic Proxy

2010-02-28T18:59:00.001+05:30

Ref: http://www.devx.com/Java/Article/21463/1954

JDK configure SQL DEVELOPER

2010-02-13T12:05:00.003+05:30

Issue(Fedora):
Oracle SQL Developer
Copyright (c) 1997, 2009, Oracle and/or its affiliates.All rights reserved.

Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file

My Solution(Might not be Standard way but works):
vi /usr/local/bin/sqldeveloper

Initial Content:
---
/opt/sqldeveloper/sqldeveloper.sh
---
Modify it to :
---
export JAVA_HOME=/usr/java/latest/
/opt/sqldeveloper/sqldeveloper.sh
---

Basically the issue is sqldeveloper always look for JAVA_HOME environment variable and use the same while trying to launch.

The other workaround is:
You have to set the environment variable JAVA_HOME to where your JDK is installed. I installed my JDK at /opt/java/x64/jdk1.6.0_12 so I start SQL Developer like this:

JAVA_HOME=/opt/java/x64/jdk1.6.0_12 sqldeveloper.sh

Eclipse Debug or Run Applications Export to windows or Linux Script

2010-02-06T06:13:00.001+05:30

To export your run/debug configuration in eclipse into batch file or shell file , we can use the plugin http://sourceforge.net/projects/eclipsessgen/

Configure New Java Plug in to Firefox 3.6

2010-01-09T22:08:00.002+05:30

cd /usr/lib/mozilla/plugins/
ln -s $JAVA6_JRE_HOME/lib/i386/libnpjp2.so

More Info at http://java.sun.com/javase/6/webnotes/install/jre/manual-plugin-install-linux.html
thats all ...

vi editor xml copy paste annoyance

2009-11-15T22:18:00.002+05:30

Hi,
Since some time, I had an issue while pasting the xml content in vi editor. It is reformating or indenting that. I try to solve this issue and found the solution.

Solution: In your vi editor just execute :set paste before copying any text, so that vi understand that and won't format the copied text or xml. Once the copy thing is done you again revert this by executing :set nopaste

The solution is very simple but it was a long time to found the solution.

How I make audio/sound work on my fedora 11 hp 6530b

2009-11-08T21:23:00.006+05:30

I tried a lot to make my laptop sound working,...

But I guess the following things made my laptop built speaker working,...

1) Read the steps mentioned here: https://answers.launchpad.net/ubuntu/+source/alsa-driver/+question/61903
http://www.linuxforums.org/forum/redhat-fedora-linux-help/119678-no-sound-realplayer-11-a.html
2) Next to configure vlc : In preferences I set audio to make use of pulse audio
3) Configure Real Player: In real player preferences, hardware section, set audio to make use of alsa. This time some may have real player crashed while try to play audio. Now try running a command "realplay" and check what error it is showing.
If it is something like /usr/lib/alsa-lib/libasound_module_pcm_pulse.so then try run following command as root

yum reinstall pulseaudio*

yum install alsa-utils pavucontrol pavumeter paman padevchooser paprefs alsa-plugins-pulseaudio gstreamer-plugins-pulse pulseaudio pulseaudio-core-libs pulseaudio-esound-compat pulseaudio-libs pulseaudio-libs-glib2 pulseaudio-libs-zeroconf pulseaudio-module-gconf pulseaudio-module-x11 pulseaudio-module-zeroconf pulseaudio-utils xine-lib-pulseaudio xmms-pulse audacious-plugins* gstreamer-plugins* gstreamer-ffmpeg xine* alsa*pulse*

This should fix all real player issues.
3) Skype may still not working to make it work,.. I made changes as shown below and closed the skype and restart it. Thats all you I did to make my fedora 11 sound work on HP 6530b.

Why Thinkfree is not able to commpete with Google Docs

2009-11-08T06:14:00.002+05:30

For people who does not know about thinkfree, thinkfree is online doc sharing web site similar to google docs.

Coming to current topic, Think free is using java applet technology to show the document. Initially both edit and view both are using java applet technology but currently they are using the java applet technology only to edit the document.

When I saw the thinkfree docs in applet I am very happy that finally there is a killer appication using java applet technology but sun is not kept his best efforts to make applets load quick in browser. Mean while flash raised itself with a flash plugin for browser by just giving the subset possibilities of applet but fixing all the issues related to applets and they become must thing for browser.

IF thinkfree has decided to use html-javascript technology or flash-javascript integration then they would have become a great player in this market.

Sun, now coming up with JavaFx which is also using the applet technology internally and trying to make applets load quicker in browser by making whole JRE modularised. So they started understanding how developers get hated the applet technology in the browser in the past. Any how if sun succeed in their efforts then I will definitely start using think free to store my documents online and edit.

There is one reason why I tend to shift thinkfree if they can load quick means, the edit document options given by think free are almost equivalent to the options available in MS office 2003.

ALL THE BEST thinkfree.

OpenOffice static and relative references

2009-10-02T17:51:00.003+05:30

OpenOffice static and relative references

Short tutorial on relative, mixed and absolute references in a spreadsheet.
This is not really Calc specific.

When used in cell B2:
A1
refers to the cell one row above and one column to the left.
Copying
down: A2, A3, A4, ...
Copying to the right: B1, C1, D1,
...
Copying up: A#REF! [A is valid but there is no further row
above row above A1]
Copying to the left: #REF!1 [Row 1 is valid
but there is no further column left of A1]

$A1 refers to the
cell one row above in column A.
Copying down: $A2, $A3, $A4,
...
Copying to the right: remains $A1

A$1 refers to the
cell in row #1 and one column to the left.
Copying down: remains
A$1
Copying to the right: B$1, C$1, D$1, ...

$A$1 refers to
the cell A1
Copying down: remains $A$1
Copying to the right:
$A$1

Same with A1:B5, A1:$B5, A1:B$5,...
Rarely used and
Calc specific: Sheet2.A1 vs. $Sheet2.A1 when copied across
sheets.

The $ creates an absolute reference, so $B is always
specifically column B.

Without that $, you have a relative
reference, meaning a position relative to whatever the current
position is, so it changes for each cell where the reference is
placed.
In other words: The $ "freezes" the following
row or column.

Moving (Cut&Paste) references rather than
copy does not adjust relative references.

Tip: Shift+F4
toggles the active cell's references A1-->$A$1-->A$1-->$A1
and back to A1. This works also with selected portions of a formula
while in edit mode.

Address ALready in use: Linux ssh

2009-08-07T18:46:00.003+05:30

Ref: http://forums.macosxhints.com/showthread.php?t=91880

Problem
unBind port wit terminal

I do loads of port forwarding though SSH for server administration (6 external sites)

Since upgrading to leopard i have had issues....hey surprise surprise still trying to work out why i updated....;-)

Anyway this is the main command i use
sudo ssh -L3283:127.0.0.1:3283 -L5900:127.0.0.1:5900 username@hostname

I have used this for years....I close the terminal window and open another window and connect to another server no problems but now i get this

channel_setup_fwd_listener: cannot listen to port: 3283
bind: Address already in use
channel_setup_fwd_listener: cannot listen to port: 5900
Could not request local forwarding.

How can i release the port forwarding ? so i can connect to servers....obviously a reboot resets this but it is impractical and damn right stupid to have to do this !

Now the Solution
I use this: ps auxww | awk '$0~/11919/&&$0!~/awk/{print $2}' |xargs kill
to kill this: ssh -L 11919:news.server.tld:119 -N user@server &

To kill the above, use: ps auxww | awk '$0~/3283/&&$0!~/awk/{print $2}' |xargs kill
and ps auxww | awk '$0~/5900/&&$0!~/awk/{print $2}' |xargs kill

I am sure given some time, you could incorporate the 2 into one. This will get you started. Regardless that looks for anything in the output for 'ps', and pipes the pid to kill via xargs.

Multiple Dimensional Sorting

2009-07-27T11:01:00.003+05:30

Ref: http://radio.javaranch.com/pascarello/2009/05/29/1243615124260.html

Multiple Dimensional Sorting

JavaScript does not have a built in way to do 2D, 3D, nD sorting so we need to code our own. The code below will allow us to mutliple dimensional sort on as many columns as our heart desires.

The Code


Array.prototype.sortMulti = function(){

    var argsLen = arguments.length;
    var args = arguments;

    function custSort(a,b){

        for(var i=0;i<argsLen;i++){
           var col = args[i];
           var x = a[col];
           var y = b[col];
           if(x===y)continue;
           return x > y;
        }

        return 0;

    }

    return this.sort(custSort);

}

The code above is pretty simple. It extends Array so we have a new method we can call. The arguments of the method is the column indexes that we want to sort. The custSort method loops through the indexes we apply and determines the sort order. It is very simple and straight forward to use.

Example Usage


myArray = [
    [1,"b",1],
    [2,"a",3],
    [2,"b",1],
    [1,"a",4],
    [3,"a",3],
    [3,"a",-1],
    [3,"a",0],
    [1,"d",1],
    [4,"a",2],
    [1,"c",5]
];

var newOrder1 = myArray.sortMulti(0);
var newOrder2 = myArray.sortMulti(0,1);
var newOrder3 = myArray.sortMulti(0,1,2);
var newOrder4 = myArray.sortMulti(2,1);

The examples above show different sort orders, newOrder one only sorts one column while newOrder3 sorts in regards to three columns. You should notice that the index starts at zero and not one!

When to Introduce an Interface (in Java code)

2009-07-27T10:50:00.001+05:30

Ref: http://radio.javaranch.com/ilja/2009/07/23/1248334442131.html

When to Introduce an Interface (in Java code)

This is an answer to a question asked at Java Ranch: "How often should classes be programmed to an interface?" As this question gets asked regularly, I thought I'd "archive" it here...

I basically introduce an interface for five different reasons:

I want to mock an object for a unit test
a client only needs to depend on a small subset of the operations of a class (and for some reason, I can't/won't break down the class into smaller ones) ( Interface Segregation Principle)
to invert the dependency between two modules ( Dependency Inversion Principle)
to use polymorphism with classes that aren't related by a common superclass
I need to publish an API to a third party

In all other cases, I find that with modern tools it's so easy to introduce an interface after the fact - once I feel the need for it -, that introducing it "just in case" creates more disadvantages than advantages.

“Good” Lessons on How To Fail a RIA Project

2009-07-23T10:48:00.002+05:30

Ref: http://www.infoq.com/news/2009/07/Lessons-to-Fail-RIA-Project

In a presentation called Ten Ways to Ensure RIA Failure, Anthony Franco, president of EffectiveUI, gives 10 pieces of advice to those who want their RIA project to fail. Gerd Waloszek, SAP AG, wrote 18 Golden Rules for Bad User Interfaces.

These are the 10 pieces of anti-advice given by Franco explaining why they should be avoided and what should be done instead:

If You Want to Fail, Do Not Understand the End User – 70% of all IT projects fail because of user acceptance.
If You Want to Fail, Trust Developers to Make Good Design Decisions. Developers are encouraged to make bad design decision by tracking their work using the number of features completed. When a project is going to miss the deadline, the developers focus on removing features instead of thinking at the end user
If You Want to Fail, Hope for a Silver Bullet Design. Great ideas are welcome, but a great feature idea should not replace good, healthy UI design
If You Want to Fail, Build for Everyone. “If a company tries to build a product for everybody, it will end up building it for nobody”
If You Want to Fail, Launch & Forget. After the launch, the product needs more iterations to be polished and completed.
If You Want to Fail, Do Not Define Success. Not defining success means not knowing where one is heading to.
If You Want to Fail, Avoid Conflict. Conflict is not necessarily bad, because “there is no progress without conflict.” A red flag should be raised when everyone in the room agrees with an idea.
If You Want to Fail, Believe You Should Not Have to Sell Your Ideas. Stakeholders should be looking to sell their idea inside their organization, and do not expect it to be accepted simply because it comes from them. This involves being ready to answer questions like: what is the ROI, what is success for this, why now, what if we do not do it now?
If You Want to Fail, Plan for Perfection. One should not be planning all from the beginning and expect it to happen as planned because chances are it won’t.
If You Want to Fail, Value Process Over Product. This advice can be rephrased: “If You Want to Fail, Take No Risk.” We may highly value the development process we are using, but “it means nothing to deliver a crappy product in time”, and it is easier to build the desired product with an iterative approach.

Following are Waloszek’s 18 golden rules along with some negative examples that should not be followed:

Keep The Users Busy Doing Unnecessary Work - Let users enter data into fields only to tell them afterwards that they cannot enter data there (e.g. an application lets you enter data on holidays or weekends and tells you afterwards that you cannot work on those days).
DO NOT OBEY Standards - Do not place menu items into the categories and locations they typically belong to (e.g. place "Save" in the "Edit Menu").
Make It Slow - There are nearly unlimited possibilities of making software slow. For example, you can include long lasting checks or roundtrips after each user input. Or you can force users through long chains of dialog boxes.
Use Abbreviations Wherever Possible, Particularly Where There Would Be Space Enough For The Complete Term - Use "dat." instead of "date," "TolKy" instead of "Tolerance Key," "NxOb" instead of "Next Object," and many more...
Educate Users In Technical Language - Always send URLs as UTF-8 (requires restart) (advanced settings in MS Internet Explorer)
Hide Important And Often-Used Functionality From The Users' View - Hide important functions in menus where users would never expect them.
Make Your Application Mouse-Only – Do Not Offer Any Keyboard Shortcuts
Make Using Your Application A Real Challenge - Do not warn users if actions can have severe consequences.
Keep Away From End Users - Many end users have many opinions, you have one. That's far easier and faster to implement.
Spread The Message Of Bad Examples And Live It - Just follow any of the other golden rules on this page, that's a perfect start.
Take Great Care In Setting Bad Defaults: Contrary To The Users' Expectations, Disastrous, Annoying, Useless – It's Up To You - Set default options in Web forms so that users get unwanted newsletters or offers, have their addresses distributed, etc.
Destroy The Work Context After Each System Reaction - Deselect selected screen elements after a system reaction (e.g. a round trip).
Leave Out Functionality That Would Make The Users' Life Easier – Let Them Do It The Hard (Cumbersome) Way - When users want to add items to a list, allow them to add items at the end of the list only and let them then move the items to the correct position. That is, do not offer additional functionality for inserting items at their target locations. To add some spice, introduce spurious errors that return items to the bottom when users have already moved them half-way up.
Do Not Let Users Interrupt Time-Consuming And/Or Resource-Hungry Processes - Start a backup or indexing process while users are not aware of it. Make this process hard to cancel, that is, let it ignore the users' mouse clicks and key presses.
Make It Illogical - Label a button that will only prepare an operation so that users believe that it will already do the operation. Here is a real-word example: In many e-mail applications, the Forward button does not actually forward an e-mail but prepares it only for forwarding (because, for example, the recipient has still to be provided).
Add A System Crash From Time To Time Or Let Applications Simply Freeze - Let editors or edit fields freeze at unforeseeable intervals so that users will not fall into the habit of saving their work frequently, which would unnecessarily waste valuable system resources.
Block User Input As Often And Long As Possible - Page loading is also an appropriate event for blocking user input. Users may chat with their room mates, read the newspaper, or simply stare at the empty screen during that time.
Block User Input Even If It's Not Necessary - Blocking user input in an image browser while it updates the thumbnail images is a good example of this –there is absolutely no reason why users should not be able to scroll, select images, or initiate an action.

Are there other “good” advices on how to fail a RIA project, ones that should be avoided at all costs?

Small XML parser for thin client (Around 3KB jar only)

2009-06-26T12:21:00.001+05:30

Ref : http://www.javaworld.com/javatips/jw-javatip128.html

You can download the code here: http://www.javaworld.com/javaworld/javatips/javatip128/xmlparsertip.zip

javascript : Edit whatever you want on ANY page : Images, Text.

2009-06-09T11:24:00.001+05:30

This is cool! while viewing any web page in browser you can copy the following bold text and paste it into the address bar and press enter .....
javascript:document.body.contentEditable='true'; document.designMode='on'; void (0);

Feel free to edit whatever you want on the page!

Search Text in a Folder using grep

2009-06-08T10:18:00.002+05:30

To search for text ABCDEF in files with extension js

grep "ABCDEF" *.js

WebSphere 6.1 EJB Look up from standalone

2009-04-13T12:40:00.008+05:30

Hi guys,

It was very good experience in making EJB lookup in WebSphere from Standalone Client

Don’t copy the code directly, first understand it and then modify the place holders to co-up with your environment and try…. .

Here is the code I used:

import java.util.HashMap;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import com.misc.ejb.Home;
import com.misc.ejb.Remote;

public class TestClient
{

public static void main(String[] args) throws Exception
{

try
{
Hashtable ctx = new Hashtable();
ctx.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory" );
ctx.put(Context.PROVIDER_URL, "iiop://<IP_ADDRESS_OF_YOUR_WEB_SPHERE_MACHINE>:<BOOT_STRAP_PORT_FOR_YOUR_PROFILE>" );
ctx.put( "org.omg.CORBA.ORBClass" , "com.ibm.CORBA.iiop.ORB" );

InitialContext myCtx = new InitialContext(ctx);

Home miscHome = (Home) PortableRemoteObject.narrow(myCtx
.lookup( "cell/nodes/<YOUR APP SERVER PROFILE_NODE_NAME>/servers/server1/<EJB_JNDI_NAME>" ), Home. class );

Remote miscRemote = miscHome.create();
valueContext = miscRemote.loadServerErrorCodes(valueContext);

System.out.println(Show.xmlText(valueContext.getObject(HashMap. class ,
ValueContextConstants.SERVER_ERROR_CODES_MAP)));

} catch (Exception e)
{
e.printStackTrace();
System.out.println(e);
}
}
}

Your classpath must contain ws_runtime.jar which will be available in

%WEB_SPHERE_HOME%/Appserver/deploytool/itp/plugins/com.ibm.websphere.v61_6.1.0/

Issue: java.lang.ClassNotFoundException: com.ibm.websphere.naming.WsnInitialContextFactory
Solution: Add %WAS_HOME%/Appserver/deploytool/itp/plugins/com.ibm.websphere.v61_6.1.0/ws_runtime.jar to the classpath

Issue: java.lang.NoClassDefFoundError: com/ibm/CORBA/iiop/ObjectURL
Solution 1: Use IBM JRE
Solution 2: Keep the ibmorb.jar, which is available in IBM JRE to your CLASSPATH and also add following one more property in initial context properties
ctx.put("org.omg.CORBA.ORBClass", "com.ibm.CORBA.iiop.ORB");

Thats it you are done…..

Please feel free to add any comments….

--------------------------------------------------------------------------------------------

You can do the same with out less effort reuse the old code of creating Intial context with no parameters as follows:

Have the following method before all the JNDI initialisation

protected static void initStandaloneProps()
{
System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory" );
System.setProperty(Context.PROVIDER_URL, "iiop://[WAS_HOST_NAME]:[WAS_BOOT_STRAP_PORT]" );
System.setProperty( "org.omg.CORBA.ORBClass" , "com.ibm.CORBA.iiop.ORB" );
System.setProperty( "com.ibm.CORBA.ORBInit" , "com.ibm.ws.sib.client.ORB" );

}

And then have the following libraries in your classpath:

com.ibm.mqjms.jar, jms.jar (Get from MQ installation)

ws_runtime.jar, com.ibm.ws.runtime_6.1.0.jar, com.ibm.mq.jar, dhbcore.jar (Get from WAS installation)

ibmorb.jar (Get from WAS JRE libs)

Thats it,... use the same code that is already there to lookup in process....

Read a single line from File Linux

2009-04-01T19:06:00.001+05:30

$cat myfile
1
2
3
4
5
$ sed -n '3p' myfile
3

----------------------------------
Same can be done in vi by open the file(myfile) with vi
$vi myfile

and use command :3w lineText.dat

Now you you will be able to have that line context in new file called lineText.dat

Disconnected CachedRowSet

2009-02-12T18:59:00.001+05:30

CachedRowSet crs = new CachedRowSetImpl();
crs.populate(rs);

use as like regular ResultSet

Cross-browser XML and JavaScript

2009-02-04T16:49:00.001+05:30

Cross-browser XML and JavaScript

Ref: http://www.alexatnet.com/node/62

Spring Mail and Gmail SMTP server

2009-02-03T14:59:00.005+05:30

Working project can be down load at
http://sites.google.com/site/iamdvr/Home/spring-mail-project-files-for-eclipse/SpringMain.zip?attredirects=0&d=1

Filed under open source, spring

In case you need to use Spring Mail with Gmail SMTP server, first of all configure a mail sender bean:
 <bean id= "mailSender" class= "org.springframework.mail.javamail.JavaMailSenderImpl" > <property name= "host" value= "${mail.host}" /> <property name= "port" value= "${mail.port}" /> <property name= "username" value= "${mail.username}" /> <property name= "password" value= "${mail.password}" /> <property name= "protocol" value= "${mail.protocol}" /> <property name= "javaMailProperties" > <props> <prop key= "mail.smtps.auth" >true</prop> <prop key= "mail.smtps.starttls.enable" >true</prop> <prop key= "mail.smtps.debug" >true</prop> </props> </property> </bean>

We could take to a property file the relevant properties:
mail. host = smtp. googlemail . com mail. port = 465 mail. username = yourUsername mail. password = yourPassword mail. protocol = smtps

Let’s see an integrational test for this:
public class SimpleMailSenderTest extends AbstractDependencyInjectionSpringContextTests { protected MailSender mailSender ; public SimpleMailSenderTest () { setPopulateProtectedVariables ( true ); } @ Override protected String [] getConfigLocations () { return new String [] { ”applicationContext. xml ” }; } public void testSendEmail () throws Exception { SimpleMailMessage simpleMessage = new SimpleMailMessage (); simpleMessage. setFrom ( ”fromEmail” ); simpleMessage. setTo ( ”toEmail” ); simpleMessage. setText ( ”Testing text” ); simpleMessage. setSubject ( ”Testing subject” ); mailSender. send ( simpleMessage ); } }

In case we have a template for sending these emails we could define a template message bean:
<bean id= "templateMessage" class= "org.springframework.mail.SimpleMailMessage" > <property name= "from" value= "fromAddress" /> <property name= "to" value= "toAddress" /> </bean>

Alternatively, we could also specify replyTo, cc, bcc, sentDate, subject and text.

For more info on spring mail : http://static.springframework.org/spring/docs/1.2.x/reference/mail.html http://www.mkyong.com/spring/spring-sending-e-mail-via-gmail-smtp-server-with-mailsender/

jasper report creation sample

2009-02-02T10:58:00.004+05:30

For jasper report creation Ref:

http://www.cise.ufl.edu/~otopsaka/CIS4301/ReportDemo/ReportFromJava.html

http://java.dzone.com/articles/java-reporting-part-2

Resizable Text Area Example - drag the image below the textarea

2009-01-30T18:12:00.002+05:30

Resizable textarea

Ref:

http://www.dynamicdrive.com/forums/showthread.php?t=31785
http://demos111.mootools.net/Resizable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> new document </title>
<script>
var glob;
var posy;
function resize(id, event) {
try {
ida=id;
glob = document.getElementById(id).style;

if ( !event ) var event = window.event
posy = event.clientY + document.body.scrollTop;
document.onmousemove = _resize;
document.onmousedown = _resize;
document.onmouseup = _cancel;
}
catch (err){
}
}

function _cancel() {
document.onmouseup = null;
document.onmousemove = null;
}
function _resize(event) {
try {
if ( !event ) var event = window.event
event.cancelBubble = true;
event.returnValue = false;
if (event.stopPropagation) event.stopPropagation();
if (event.preventDefault) event.preventDefault();
var move = event.clientY + document.body.scrollTop - posy;
posy = event.clientY + document.body.scrollTop;
var height = glob.height.replace("px", "")
if (((+height) + move) > 20) glob.height = (+height) + move;
}
catch (err){
}
}
</script>
</head>
<body>
<textarea name="comments" id="textarea" wrap="virtual" style="height: 34px; width: 100%; margin-top : 5px; margin-bottom : 0px" maxlength=500></textarea>
<div style="margin-right: 0px;height: 5px; font-size:0; background: #eee url('http://lh5.ggpht.com/_tvT5M_qi4PY/SYLqmu8g8fI/AAAAAAAAA1I/ZsB3CC1lMPg/s144/grippie0.png') no-repeat 50% 1px; border: 1px solid #ddd; border-top-width: 0; cursor: s-resize;" onmousedown="javascript:resize('textarea',event)"/>
</body>
</html>

I was not able to format the code properly, but this works across all browsers

WebSphere MQ secirity error -solved

2009-01-29T18:41:00.003+05:30

To workaround the following issue while connecting to MQ:

This is applicable only to Linux Fedora

Encountered JMSException --> MQJMS2013: invalid security authentication supplied for MQQueueManager
javax.jms.JMSSecurityException: MQJMS2013: invalid security authentication supplied for MQQueueManager
at com.ibm.mq.jms.MQConnection.createQM(MQConnection.java:2050)
at com.ibm.mq.jms.MQConnection.createQMNonXA(MQConnection.java:1532)
at com.ibm.mq.jms.MQQueueConnection.(MQQueueConnection.java:150)
at com.ibm.mq.jms.MQQueueConnectionFactory.createQueueConnection(MQQueueConnectionFactory.java:185)
at com.ibm.mq.jms.MQQueueConnectionFactory.createQueueConnection(MQQueueConnectionFactory.java:112)
at com.ibm.mq.jms.MQQueueConnectionFactory.createConnection(MQQueueConnectionFactory.java:1050)

To solve this issue connect to MQ server machine and navigate as follows

cd /var/mqm/qmgrs/

cd <QUEUE_MANAGER_NAME>

Now try to open the qm.ini file using following command

vi qm.ini

The file will be look as below

#*******************************************************************#

#* Module Name: qm.ini *#

#* Type : WebSphere MQ queue manager configuration file *#

# Function : Define the configuration of a single queue manager *#

#* *#

#*******************************************************************#

#* Notes : *#

#* 1) This file defines the configuration of the queue manager *#

#* *#

#*******************************************************************#

ExitPath:

ExitsDefaultPath=/var/mqm/exits/

ExitsDefaultPath64=/var/mqm/exits64/

#* *#

Log:

LogPrimaryFiles=3

LogSecondaryFiles=2

LogFilePages=1024

LogType=LINEAR

LogBufferPages=0

LogPath=/var/mqm/log/dvr!queue!manager/

LogWriteIntegrity=TripleWrite

Service:

Name=AuthorizationService

EntryPoints=13

ServiceComponent:

Service=AuthorizationService

Name=MQSeries.UNIX.auth.service

Module=/opt/mqm/lib/amqzfu

ComponentDataSize=0

Remove Red color background lines and restart queue manager.

Thats it, you are resolved from the above issue.

Maven WebSphere 6 integration

2009-01-13T10:29:00.000+05:30

Ref: http://mojo.codehaus.org/was6-maven-plugin

Desu Venkateswara Rao: web-dvr

Visualize Maven Project Dependencies with dependency:tree and Dot Diagram Output

Eclipse Search Replace variable param

How to Get Unstuck

What today's software developers need to know

Don't Rewrite Your Application

Ref: http://java.dzone.com/articles/dont-rewrite-your-application

Oracle System Queries for Retrieving Oracle Database Object Information

ORACLE SEQUENCE COLUMN BASED ON ORDER BY OF OTHER COLUMN

Nokia C3 Wifi Problem

Password retrieval Websphere

The Mysteries of Business Object

How to Embed Existing Files into Open Office Text document

.jrxml to .jasper and vice versa

What is difference between Bug Priority and Severity

Colurs to use in presentation

Transaction Processing books

Open Office Macro Row Compare

Success as technical lead

Double Brace Initialization

SVN add for all un-added files

SVN add for all un-added files

Windows equivalent commands in Linux

clone root account linux

Blogs I like on JVM (Java)

Know the JVM Series – 1 – The Uncaught Exception Handler

Know the JVM Series: Shutdown Hooks

VPNC run as regular user

Compare RAW data type in ORACLE

Practical Software Design - A few thoughts!

Practical Software Design - A few thoughts!

Diagnosing classpath problems

no-more-demo-code

using java reflection implement an absolutely generic dao and make legacy db integration smoothly

Is Oracle Right to Sue Google ( I feel Right). Save Java from fragmentation)

Run Multiple instances of Firefox

File copy in java observations

Stateful And Sateless thoughts I like

java Time zone as offsets from UTC/GMT

Simple Pluggable java Applicaion

Backward Compatability Challenges Java

java object initialization

Mathematical Functions

How to be a worse programmer

Linux: How to clear the cache from memory

Nicely written examples for XML parse in Java

Sort And Search Algorithm

Algorithms

Debug Websphere or Java EE server using eclipse

CVS tag/branch creation/modification

Linux: File full path

Joshua Bloch: Bumper-Sticker API Design -- Design a Good API & Why it Matters

Concerns on spring Framework

All about Life

What makes a good software architecture?

spring silver bullet use case

Enterprise Java Application Plugin - Jar reload

Style of Increasing focus on work

Reloading Java Classes Series

Reloading Java Classes Series

Open Office Code or Script Format

Is Strong Typing Really Needed?

Publish blogs from Open Office

Stateful Session Bean

Ref:http://onjava.com/pub/a/onjava/2001/10/02/ejb.html

Stateful Session EJBs: Beasts of Burden

The intent of Stateful Session EJBs

When SFSBs should not be used

When SFSBs should be used in non-web systems

For systems that do not have a servlet/JSP front-end, SFSBs should be used to track session-oriented state similar to the way a web-based system would use an HttpSession object. This was the primary intent of SFSBs when they were created.

When SFSBs should be used in web systems

Conclusion

Java dynamic Proxy

JDK configure SQL DEVELOPER

Eclipse Debug or Run Applications Export to windows or Linux Script

Configure New Java Plug in to Firefox 3.6

vi editor xml copy paste annoyance

How I make audio/sound work on my fedora 11 hp 6530b

Why Thinkfree is not able to commpete with Google Docs

OpenOffice static and relative references

For systems that do not have a servlet/JSP front-end, SFSBs should be used to track session-oriented state similar to the way a web-based system would use an `HttpSession` object. This was the primary intent of SFSBs when they were created.