Some New Features in Java EE 6

1. Was focused in making the Java EE platform light weight and making the environment easier for the developers
2. Introduced new APIs such as WebBeans 1.0
3. Made servlet technologies to be more matured
4. Started to prune APIs that are not used much or not essential or better options are available or technologies have shifted. It’s also an effort to make the platform light weight
5. APIs under considerations for Pruning
   • JAX-RPC [Better option: JAX-WS]
   • EJB 2.x Entity Beans [Better option: POJO based JPA and EJB 3]
   • JAXR – the adoption was very limited
   • Java EE Application Deployment and Management : As did not get much vendor support
6. Introduced the concept of profiles. As the full Java EE stack may not be required for all applications, profiles use subsets of APIs geared towards a particular type of applications [making the stack lightweight].
7. Web profile contains the APIs: Webbeans 1.0, EJB 3.1 (Lite), EJB 3.1 (full), JPA 2.0, JTA 1.1
8. In Java EE 6, JPA is completely separated from EJB and has become distinct API in its own right

From: http://sitestree.com/?p=5296
Categories:Java Short Notes
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Post Data:2008-04-29 12:19:30

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Definitely, you can write a web application (web-site) to access remote databases or web-services, and you can access that web-application from Blackberry devices. However, you can also write Blackberry applications that will access remote databases and web-services. An example Blackberry application that accesses remote databases can be found at:https://www6.software.ibm.com/developerworks/education/os-blackberry/index.html. This application assumes that there is a web-application (with web-pages to be accessed from Blackberry devices), and the Blackberry application accesses those web-pages internally from code. For example, this application accesses posttransaction.php to insert data into a transaction table in a remote database. The application works alright. You have to download the code, create a Blackberry Application in JDE (for example) – also with the server side code, you have to setup a database driven web-site. The supplied PHP/MySQL code may not work exactly as it is, use the right version of PHP/MySQL or adjust the code/database. In my test, I also added one more option to show information from the database (in the Blackberry device). Change the URL of the web-site (in PHP) in the code (J2ME)

You can also write Blackberry applications that will utilize remote web-services. You can find one such example at: http://www.simplified-tech.com/website/webapp.nsf/webpages/ArticlesBBWebServices

Other Resources that you may be Interested in

• http://www.ibm.com/developerworks/wireless/library/wi-jsr/
• http://www.blackberryforums.com/developer-forum/104780-how-call-webservice-blackberry-jde-application.html
• http://www.blackberryforums.com/developer-forum/33449-calling-net-webservice-blackberry-ksoap2.html
• http://supportforums.blackberry.com/rim/board/message?board.id=java_dev&thread.id=106
• http://today.java.net/pub/a/today/2006/01/24/introduction-to-blackberry-j2me.html
• http://handheld.softpedia.com/get/Business/Databases/Tiny-Query-Writer-BlackBerry-22419.shtml

From: http://sitestree.com/?p=5185
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Post Data:2011-08-02 05:52:17

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The Idea: You need to install J2SE, JDE (from Blackberry web-site), Blackberry Device Simulator (from blackberry web-site). In JDE, you can write Blackberry applications. When you will run your applications in JDE, the application will be executed in a simulated Blackberry device. When you are done with your development, you can deploy your applications to a real black berry device.

• Hello World Black Berry Applcation:It works alright. Also, a Hello World application is available in the sample directory under JDE installation path
• Blackberry Application Example: Sample code to open a browser automatically from your applications

From: http://sitestree.com/?p=5180
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Post Data:2010-04-01 08:35:24

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• You can download iBatis library from http://ibatis.apache.org/. Just make the Jar files available to your application
• iBatis with Spring: Need to configure at least three files.
  1. Spring config file (applicationContext.xml) – Define database connection parameters, the location of the SQL Map config file, and one or more Spring beans for use within the application in Spring Config file.
  2. SQL Map config (SqlMapConfig.xml) – Define any iBATIS-specific configuration settings, and declare the location of SQL Map files in SQL Map config file
  3. SQL Map(s) (domainObject.xml) — SQL Map files typically map domain objects (POJOs) to database objects [tables]
• In iBATIS web application, you need to use web.xml file as well
• Steps in writing a simple iBATIS application
  • Write a POJO for the domain object
  • Create database table to represent the domain object
  • Use the Spring configuration file to configure properties, and JDBC DataSources (iBATIS SimpleDataSource, Jakarta DBCP (Commons), and any DataSource that can be looked up via a JNDI context), define location of SQL Map file, define beans
  • The sqlMap property must be wired with a reference to an iBATIS SqlMap-Client (through SqlMapClientFactoryBean) (Spring configuration file)
  • Configure SQL Map file (SqlMapConfig.xml): For domain objects list sql map files
  • Create actual SQL Map files that will contain SQL code and the mappings for parameter objects and result objects
  • Start writing Java code. Start with the service layer. Service interface, service Interface implementation with methods for database operation using iBatis
  • Write iBatis test client that will make use of the service interfaces for database operations

From: http://sitestree.com/?p=5157
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Post Data:2008-07-11 00:50:30

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Hibernate

• Object Relational Mapping Software
• ORM qualities: Pure relational, Light object mapping, Medium object mapping, Full object mapping
• ORM Metadata: ORM metadata provides support for mapping between classes and tables, properties and columns, associations and foreign keys, Java types and SQL types.
• Full Object Mapping: Supports advanced object modeling: composition, inheritance, polymorphism, persistence.
• Hibernate provides database persistence
• Hibernate provides persistence query
• Hibernate may look like very similar to JPA (Java Persistence API)
• Hibernate adds more features in addition to JPA features
• Hibernate allows developers to develop persistent classes following object-oriented concepts such as association, inheritance, polymorphism, composition, and collections
• Benefits of ORM and Hibernate: Productivity, Maintainability, Performance, Vendor Independence
• Core Hibernate interfaces: Session Interface, Session Factory Interface, Configuration Interface, Transaction Interface, Query & Criteria Interface
• Extension interface for Hibernate: Proxy Factor, Connection Provider, Transaction Factory, Transaction Interface, Transaction Management lookup, Cache Interface, Cache Provider Interface, Class Persister Interface, Identifier Generator, Dialect
• Hibernate can be configured in both managed (Weblogic, Websphere) and non-managed (Tomcat) environments
• You can set the SessionFactory to a JNDI by configuring a property hibernate.session_factory_name to make it easily accessible from different places
• HQL: Hibernate allows developers to express queries in its own portable SQL extension that is called HQL

From: http://sitestree.com/?p=5156
Categories:Java Short Notes
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Post Data:2008-11-13 10:09:21

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