javaupdates

Spring tutorials

2010-05-28T04:11:00.000-07:00

Hi,

I found some good articles on spring .you can check it out in this articles.
http://www.theserverside.com/tutorial/Spring-30-Tutorial-Setting-Up-Configuring-The-Environment

Log4j and java.util.log differences

2009-12-26T07:58:00.000-08:00

Hi,

Both Log4j , java.util.log contains similar functioanlities . But in Log4j writing ur applications to different appenders are more ,for ex u can send ur log to ur email too. etc .u can find good article here in this link.check it out.

http://java.sys-con.com/node/48541?page=0,0

Completed SCWCD

2009-09-21T18:58:00.000-07:00

Hi,

another milestone SCWCD 5 .0 completed !!!

Regards

Bhavani

java Memory Leak Tool

2009-07-26T07:49:00.000-07:00

Hi,

In Real world scenarios ,memory leaks in applications are hanging our project costs.In order to find memory leaks there is a tool called Yourkit. check it out yourkit and practise with that..

http://www.yourkit.com/

Spring 2.5 AOP Book

2009-05-11T19:16:00.000-07:00

Hi,

A good book on Spring Aspect Oriented Programming(AOP) was released. u can check it out in this link

http://www.packtpub.com/aspect-oriented-programming-with-spring-2-5/book

shale framework

2009-05-02T05:28:00.000-07:00

Hi,

shale framework is one for primarly for JSF applications. u can even integrate with spring framework and testing suite for ur applications also available.event handling processing also available.check it here

http://shale.apache.org/

CSS design site

2009-05-02T05:27:00.001-07:00

Hi,

there is a good site for CSS design, u can have good designs and u can share good css files too.

http://csszengarden.com/?cssfile=/104/104.css&page=0

Icefaces open sourced

2009-05-02T05:11:00.000-07:00

Hi,

as per i know 2 wonderful ajax frameworks for JSF are Ajax4jsf,ICEFACES. Through icefaces u can have rich set of readily components ,u can use it in ur code. Now Icefaces came to open source the code,as per compettion among the others and get to popular. u can take code and try your self for better components.check it out below link

http://www.icefaces.org/main/ajax-java/jsf-ajax.iface

Twitter @ many java people

2009-04-26T10:46:00.000-07:00

Hi, .

Twitter is good site like orkut ,but one wonderful thing is you can find lot java guys , who work with spring core team and eclipse teams .so join and follow them for their new java techonology suggests etc..

http://twitter.com/

10 features which are not using in java

2009-04-19T05:40:00.000-07:00

Hi
const keyword,most of exe files in java directory such as javadoc, javaOS,applets,corba,javax,acceability, Midi library for sound applications, certain java 6 api features, assertions etc..

http://www.jroller.com/agoubard/

EPL New Licence for software

2009-04-19T05:36:00.000-07:00

Hi ,

Now a new licence came as EPL compared to earlier CPL , IBM and eclipse annouced new license for open source softwares. EPL is ISO certfied.

http://dev.eclipse.org/blogs/mike/

JTAPI

2009-04-05T08:08:00.000-07:00

hi ,
There is API for java based telephone applications, u can communicate 2 telphonic applications with this API. check it out link !!
http://java.sun.com/products/jtapi/

Spring BlazeDS Integration

2009-04-02T23:51:00.000-07:00

Hi ,
Spring BLAZE DS framework as for the spring and Flex users. The theme of the project is simple
spring + flex=== Spring BLAZE DS

1) through this framework we can bulid the server side j2ee components for Spring and UI components can built from Adobe flex. u can check the project details from following link.
http://www.springsource.org/spring-flex

java web start application

2009-03-21T23:29:00.000-07:00

Hi ,

I think most of the java guys know about the java web start , as i learned yesterday here are some points about that

1) java web start will come up with yout jdk.

2)Main purpose of this appplication is say you requested for some x application in the net ,the application u are running having old java version , then u cannot use x application which is having latest JRE environment .

3) java web start allows you to automatically download the JRE into your client system of any version whuch your application doesnt support.

4) you no need to the bother about the differnt browsers , u can mention the attibute like java 5 or java 6 what ever u want through web start ,it will take of every client which is accesing ur application ,if there is no proper version it will install and work.

http://java.sun.com/javase/technologies/desktop/javawebstart/overview.html

Java FX Compettion are u ready ?

2009-03-21T23:20:00.000-07:00

Hi,

I think you know about JavaFX, sun's technology for rich set applications for mobile and desktop.Now for RIA world competition leaded to sun introduce the competition for javaFX coding applications.Competiotion starts from march 23 to may 29 . so register the competiotion and devlop the richset applications and win the prizes.

1st prize 25000 $

2nd prize 15000$

3rd prize 10000$

even student section also it is there !!!

Here is link

http://javafx.com/challenge/

Ant or Maven ?

2009-03-02T08:53:00.000-08:00

Hi ,
As we know good build tools like Ant ,Maven which one to use?
Ofcourse Now adays every body say Maven .
Here are advantages for Maven over Ant
1) Dependency management
2) built in tags for compilation etc..
3)easy to integrate with PMD etc.

where as In Ant a lot of scripts u need to write..
Well hold on here is another question correct maven is doing good build tool
here are some questions
1) why we need still xml related things to write as some users are not aware much ?
2) there are some situations like same jars of different versions in different places coincide in through maven scripts then finding solution is very difficult .
3) why maven reposorities required where our jars not found

Here are some of emerging build tools are here
1)Gradle
2)Gant
3)Raven

still Gradle has certailn feaures depency mangagement , it has only few lines of configuration needed.
Here is the link.
http://gradle.org/

Swing Framework Still there ?

2009-03-02T08:44:00.000-08:00

Hi ,
As per new JSR in upcoming JAVA7, there one news came that still they want to include Swing Framework in java 7.But Some of the JSR team people itslef giving vote against Swing framework in java7, reason is simple , the code base what ever they are giving for Swing didnt updated.Another reason we can guess is in todays RIA world so many frameworks evolved for UI. Always developers are going for built in components frameworks like IceFaces . So my vote is also against swing in JAVA 7.

Spring framework 3.0 M2 Released

2009-02-26T06:23:00.000-08:00

Hi,

At last Spring framework 3.0 M2 released . It has certain features such as JPA 2.0 support ,and MVC portlet 2.0 etc .

Here is the link

http://www.springsource.com/download

Constructor dependency injection vs setter dependency injection

2009-02-21T03:44:00.000-08:00

Hi ,

As per dependency injection we are having 2 popluar dependency injections as setter dependecy injection,constructor dependency injection.

setter dependency injection: In this injection we will inject everything as setter methods.
for example setEmpName(). etc .

constructor injection: In this injection we will inject everthing as constructor . for example we are having class Employee . then Employee(Arguments) construction can intialize itself .

Now which one is good ? It dependens on appliation. But i prefer constructor injection. Reason is constructor injection follows order , means there is very less number of chances for ambigity .

Let us assume that we are having 3 classes or beans with in our appliaction .

for ex : Employee ,dept ,school

so 3 of them are having same method name as "Name" describing as Employee name,dept name,school name etc..

so when ever you are applying setter injection as setName() there is chance for container to go wrong to different bean as cyclic error often some times.

but when ever you are using or calling constructor injection u have to call Employee(),dept(),school() respectively. one more point is it will follow order ,if it fails it throws error.

for example you are having certain classes like

y1 y=new y1();
k1 k =new k1(y);

through our constructor injection

H h=new H(y,k); // Here if it fails in any no of arguments code willn't compile at all .

Happy Sivarathri bye :_)

OSGI Technology

2009-02-21T03:13:00.000-08:00

Hi ,

OSGI is technology which is popular now adays . a brief explanation is here

Problem : Suppose let us assume we have n number of war files in a application. Assume that we installed our application in application server . Rememeber we made single war or jar with multiple jars/wars and deployed as single component. suppose any change we want to do for one jar file in whole application. Then we have to stop the whole application and make the changes and deploy again . which is effectiing all the modules of application.

Solution: Here is OSGI technology comes for that ,it comes with bundles of components and if u want to change the particular jar u can change at runtime also with out stopping appliaction .This is a simple example use of OSGI.

Now OSGI is coming with almost all popular application servers.

Here is the link

http://www.osgi.org/Main/HomePage

web Authorization using XACML

2009-02-12T08:33:00.001-08:00

Hi ,

as per servlets specification we can have security access to web reources in containers in xml file.But if u want to have security access customized like some of employeees only allowed to certain parts u can have XACML , where 2 points will be there to control resources ,first reuest will come to policy enforce pont (PEP) frrom there it will check policy decision point PDP ,whether access needed or not , instead of writing customizes code for ur application. u can use jboss XACML

thing .

Here is link

https://www.jboss.org/community/docs/DOC-10840

Java FX 1.1

2009-02-12T08:31:00.000-08:00

Hi,

java FX 1.1 released in which u can develop applications not only related to desktop, u can have ur applications in even mobile also

java Performance Test clues

2009-02-01T18:32:00.000-08:00

Hi ,
As i read in one article about java performance test .Here are some clues which i got from article.
When ever u are doing performance testing for java code make sure following points
1) As per Performace test use what are exisitng poplular java performance tools .
2) when ever u are doing performance testing on LOOPS like While,for,Iterator you should nt get variant results. If it is

2.1 Repeat the performance tests for particular code ,and make sure results are same.
2.2 Before doing testing make sure that all applications are closed like word etc ,because if your jvm using any bit of application results will vary.
2.3 Check your memory available in CPU .
2.4 Check the threads which are dependent on other threads.

3) At last check all the methods or application code which is contacting outside application .

These are some clues i found , you please refer certain performance tools available in market .

WEB4J framework

2009-02-01T08:43:00.000-08:00

Hi,

A new framework for java WEB4J came to Exisistance.If you want to try this new framework

check here

http://www.web4j.com/

MQ Port Scan v1.0.0

2009-01-28T06:14:00.000-08:00

Hi ,
MQ Port Scan v1.0.0 version released , there main intention is we can scan a range of ports for given Queue manager, MCA at particular IP address ,and makes successfull connection. The input is Ipaddress or host name so that it can search ports of particular IP for successful connection.
check it out link
http://www.capitalware.biz/open_source.html

Servlet 3.0 Public Review Updates

2009-01-28T02:01:00.000-08:00

Hi,
Servlet 3.0 came to public review , Here are some highlights

1) Annotation based notations
for ex:
@WebServlet(name="k",urlPatterns="kk",initParams={"l"})
public class newServlet extensd HttpServlet
{

}
you can have filter also have annotation @ServletFilter
instead of having Entries in web.xml file.

2)Asynchronous Support:
Servlet can wait for a particular resources(JDBC,WebService etc) asychronously.
3)Secuirty Feature:
HttpServletRequest and HttpServletResponse having feature like Login ,when ever request comes automatically forwading to Login Page and as like Logout feature.

Eclipse Modelling Framework(EMF)

2009-01-27T22:59:00.000-08:00

Hi ,
There is a open source framework called Eclipse Modelling Framework(EMF). EMF is basis for so many IBM websphere products. Through this framework we can develop a graphical model ,so that we can generate code from that model.If any change occurs we can easily modify the graphical item and regenerate code. As good example is we can create UML models and can generate the code.

check the link
http://www.ibm.com/developerworks/library/os-ecemf1/

JBOSS RESTEasy 1.0 GA Released

2009-01-22T19:12:00.000-08:00

Hi ,

JBOSS RESTEasy 1.0 GA is a framework for developing the RESTFUL web services in java .It is having feature with integration of spring framework also.Its supports o specification of JAX-RS.

check it out here

http://www.jboss.org/resteasy/

Which Framework to use?

2009-01-20T06:25:00.000-08:00

Hi ,

There are lot of web frameworks availiable in the world.So which frame work to use mainly depends on the type of application.As Java developer i prefer Spring frame work.Because it has many dynamic components such as AOP(Aspect Oriented Programming),Dependecy framework when compared to typestary,strurts frameworks.In Spring you have advantage of what you want you use and left it out what u dont want !!

Even Now Spring comes with OSGI implementation,etc like todays world there lot of dynamic things are coming to Spring , One more point is u can integrate with other frameworks also important feature of Spring !!

check it @ www.springsource.org

Spring Sorurce tm server

2009-01-14T18:48:00.000-08:00

Hi ,

Till now we have seen so many web servers like tomcat etc and application servers ex weblogic,websphere.Difference you knows tomcat is very light and very fast container ,but only problem is not behaves like an application server. Now "Spring Source tc Server" is a tomcat server with all capabilities like what it does for weblogic,websphere etc ,very fast .we can deploy all the ear files into new tomcat server.Now is it require any websphere or weblogic or any other application servers?
Now this product is going to be in Market .Let us warm welocme another light weight product !!!

Here is the link check it out

http://www.springsource.com/products/suite/tcserver

Jar Analyzer

2009-01-12T18:54:00.000-08:00

hi,

Jar Analyzer tool is dependency management tool , what it does for us is ,

it will go through directory of ur jars,and analysis the dependecy between

different jars and tell us the relationship ,duplicates between jars in a map.

Check it out Here

www.code.google.com/p/jaranalyzer/

Log digger

2008-12-30T18:52:00.000-08:00

Hi ,

Log digger is used to get application logs in firefox Browser itself.It can help monitor application logs when requesting for application at same time by different users.

check it out in link

http://logdigger.com/

MyEclipse

2008-12-10T09:17:00.000-08:00

well,

My Eclipse New Version 7.0 released. Here is the link for trail version...

http://www.myeclipseide.com/module-htmlpages-display-pid-4.html

Googles Android

2008-11-29T09:05:00.000-08:00

Hi Guys,

Googles Android is an operating system for mobile devices ,and even it act as middleware.They have given SDK for different OS.So It has its own JVM.U can download the SDK and u can develop the applications using API given by google.Now Emerging market becomes for mobile OS .Now already Mobile OS war is going on with Apple's Iphone and googles Android.

But one wonderful feature Given by google was its given entirely open source code.
u can develop the applications and distribute to different vendors,so that economically u can also survey as u have Zeal.

Here is the link check it

http://code.google.com/android/what-is-android.html

Transactions In EJB,Spring->Part1

2008-11-19T09:53:00.000-08:00

Transactions in Spring and EJB Context.

I will go to straight point to how Transactions useful ,instead of explaining all ACID Properties .In this first part we will discuss about types of transactions.

There are 3 types of transaction u see in the java world.

1) Local Transactions
2) Programatic Transactions.
3) Declarative Transactions.

1) Local Transactions :

In Local Transactions ,u no need to worry about the transactions ,underlying managers take care ,for example if u take JMS related transactions there is QueueConnectionFactory which is the resource manager take care, if u take jdbc related things it will take care of default commit, u no need to worry about the things.

But say

Connection con=datsource.getConnection();
Statement st=con.createStatement();
String sql=”some statement”;
String sql1=”some statement”;

Try {

St.executeUpdate(sql);
St.executeUpdate(sql1);

Con.commit();
}catch(Exception e)
{
Con.rollback();

}

Here Defaulty transaction Manager will commit 2 things ,as we didn’t set autoCommit false.Say for example. First executeUpdate executes fine then any problem occurs,the rollback will happen to only upto 2nd statement.First execute Update statement still commited. So inorder to maintain Local Transactions , we will use

Con.setAutoCommit(false);

So Even one execute Statement fails automatically we can roll back all the statements.

2) Programatic Transactions :

Here in this Developer manages the transactions not like local transactions giving control to resource mangers to handle the transaction. Here the Comes for JTA(Java Transaction API).There one interface named UserTransaction Comes to picture.

Say in EJB. U will get the SessionContext or messsageDrivenContext what ever

UserTransaction ut= sessionContext.getUserTransaction;
ut.begin();
//write code
Ut.commit();

Where ever u want which individual statements want to commit or roll back u can decide and write the code.

3)Container Managed Transactions:

Here The developer don’t want to write code as begin,commit ,rollback Every thing container will take care ,just developer can say which method to do transaction and behaviour of transactions.

In EJB we can declare it in ejb-jar.xml file.

There are 6 attributes like never,Mnadatorey,Required etc given by EJB Container.Ofcourse In Spring Propagation_nested attribute extra added for chaining.

We will discuss these transactions in depth and even how it will help developers where to use each type of transactions and drawbacks of all these.Here for time being iam not discussing about spring Transactions.In next session we will discuss spring related transactions even too. Have a good Day !!!

Frameworks

2008-11-17T08:37:00.000-08:00

Hi ,

A New Framework came called "Play Framework" came for exisistane for java.
It has features

1) Framework automatically load and compile when u change the source files.
2)Vrey Good error reports.IF Exception occurs it shows directly into source code where error occurs.
3)simple MVC Support based,hibenate u can simply develop a web application
4)Containig A fast http server
5) Having some plugins for even spring ...

chcek it out if u want to try www.playframework.org

Books for SCJP,SunwebServices certfication

2008-11-14T08:30:00.000-08:00

hi ,

The good Books to follow for SCJP are

1) SCJP--> By Kathie Seria
2) SCJP --->Khalid Moghal

For Sun webservices Certification

1) J2EE Webservices --> By RMH

finding jars

2008-11-13T10:04:00.000-08:00

Hi ,
If you want to get jars there is already one site http://www.jarfinder.com . where u can serach for required jars based on class name or jar name.Just check it out.