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ADF @ BlackBelftFactory 7/19/10 4:42 PM Stijn Haus
Nexus and maven 4/23/10 11:34 AM Christophe Rikelynck
UKOUG - ADF Special Event (Londen) 4/20/10 3:23 PM Gerrit De Kepper
Calling a Java Class in PL/SQL 2/26/10 10:57 AM Contribute Administrator
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Java

Introduction

Java technology is both a programming language and a platform. Today the platform itself has become the building block for many of the new languages.
The Java programming language is a high-level language that can be characterized by all of the following buzzwords:
  • Simple
  • Architecture neutral
  • Object oriented
  • Portable
  • Distributed
  • High performance
  • Multithreaded
  • Robust
  • Dynamic
  • Secure
 
A platform is the hardware or software environment in which a program runs. We've already mentioned some of the most popular platforms like Microsoft Windows, Linux, Solaris OS, and Mac OS. Most platforms can be described as a combination of the operating system and underlying hardware. The Java platform differs from most other platforms in that it's a software-only platform that runs on top of other hardware-based platforms.

Contribute Services

We have several years of experience in ADF development, starting from the JDeveloper 3.2.3 version and BC4J technology we have been evolving to ADF11g experts. We have done tens of projects in this technology and we have gained lots of knowledge, tips&tricks on this subject. But like every other framework ADF is not always the right choice.

We do have people who are very fimiliar with frameworks like spring, hibernate, struts, ... together with their knowledge about the Oracle Database they are very valuable for companies. Lots of companies are workiing with an Oracle DB and a Java platform on top of it. We do believe we can offer them the best consultants and the best solutions for their projects. Contribute4J has been started to even deliver a better service on java/oracle technologies.

 

 

Technologies

Spring
 
Spring is a layered Java/J2EE application platform, based on code published in Expert One-on-One J2EE Design and Development by Rod Johnson (Wrox, 2002).
Spring includes:
  • The most complete lightweight container, providing centralized, automated configuration and wiring of your application objects. The container is non-invasive, capable of assembling a complex system from a set of loosely-coupled components (POJOs) in a consistent and transparent fashion. The container brings agility and leverage, and improves application testability and scalability by allowing software components to be first developed and tested in isolation, then scaled up for deployment in any environment (J2SE or J2EE).
  • A common abstraction layer for transaction management, allowing for pluggable transaction managers, and making it easy to demarcate transactions without dealing with low-level issues. Generic strategies for JTA and a single JDBC DataSource are included. In contrast to plain JTA or EJB CMT, Spring's transaction support is not tied to J2EE environments.
  • A JDBC abstraction layer that offers a meaningful exception hierarchy (no more pulling vendor codes out of SQLException), simplifies error handling, and greatly reduces the amount of code you'll need to write. You'll never need to write another finally block to use JDBC again. The JDBC-oriented exceptions comply to Spring's generic DAO exception hierarchy.
  • Integration with Toplink, Hibernate, JDO, and iBATIS SQL Maps: in terms of resource holders, DAO implementation support, and transaction strategies. First-class Hibernate support with lots of IoC convenience features, addressing many typical Hibernate integration issues. All of these comply to Spring's generic transaction and DAO exception hierarchies.
  • AOP functionality, fully integrated into Spring configuration management. You can AOP-enable any object managed by Spring, adding aspects such as declarative transaction management. With Spring, you can have declarative transaction management without EJB... even without JTA, if you're using a single database in Tomcat or another web container without JTA support.
  • A flexible MVC web application framework, built on core Spring functionality. This framework is highly configurable via strategy interfaces, and accommodates multiple view technologies like JSP, Velocity, Tiles, iText, and POI. Note that a Spring middle tier can easily be combined with a web tier based on any other web MVC framework, like Struts, WebWork, or Tapestry.
You can use all of Spring's functionality in any J2EE server, and most of it also in non-managed environments. A central focus of Spring is to allow for reusable business and data access objects that are not tied to specific J2EE services. Such objects can be reused across J2EE environments (web or EJB), standalone applications, test environments, etc without any hassle.
 
Spring's layered architecture gives you a lot of flexibility. All its functionality builds on lower levels. So you can e.g. use the JavaBeans configuration management without using the MVC framework or AOP support. But if you use the web MVC framework or AOP support, you'll find they build on the core Spring configuration, so you can apply your knowledge about it immediately.
 
Hibernate/JPA
 
Hibernate's goal is to relieve the developer from 95 percent of common data persistence related programming tasks, compared to manual coding with SQL and the JDBC API.
Hibernate Core for Java generates SQL for you, relieves you from manual JDBC result set handling and object conversion, and keeps your application portable to all SQL databases.
Hibernate provides transparent persistence, the only requirement for a persistent class is a no-argument constructor. You don't even need classes, you can also persist a model using Maps of Maps, or just about anything else. You don't even need tables, Hibernate can map entities and particular properties to SQL expressions.
 
Hibernate offers sophisticated query options, you can write plain SQL, object-oriented HQL (Hibernate Query Language), or create programatic Criteria and Example queries. Hibernate can optimize object loading all the time, with various fetching and caching options.
Hibernate adapts to your development process, no matter if you start with a design from scratch or work with an existing database, and it will support any application architecture. Combined with Hibernate EntityManager and Hibernate Annotations you can use Hibernate as a certified Java Persistence provider.
 
GRAILS
 
Grails is a high-productivity web framework based on the Groovy language that embraces the coding by convention paradigm, but is designed specifically for the Java platform.
  • Rapid: Have your next Web 2.0 project done in weeks instead of months. Grails delivers a new age of Java web application productivity.
  • Dynamic : Get instant feedback, see instant results. Grails is the premier dynamic language web framework for the JVM.
  • Robust: Powered by Spring, Grails out performs the competition. Dynamic, agile web development without compromises.
JSF
 
Developed through the Java Community Process under JSR - 314, JavaServer Faces technology establishes the standard for building server-side user interfaces. With the contributions of the expert group, the JavaServer Faces APIs are being designed so that they can be leveraged by tools that will make web application development even easier. Several respected tools vendors were members of the JSR-314 expert group, which developed the JavaServer Faces 1.0 specification. These vendors are committed to supporting the JavaServer Faces technology in their tools, thus promoting the adoption of the JavaServer Faces technology standard.
 
ADF
 
Oracle ADF is a flexible framework which makes it much easier for the JEE developer to develop applications. Furthermore, Oracle ADF also makes use of a declarative approach which makes it possible to come to high quality solutions by way of wizards. The whole package therefore offers both a saving in time as well as an increase in quality !
JDeveloper and ADF are especially intended to optimize productivity of the developer. This occurs through giving the developer complete freedom in his/her choice of the technology to be employed. He/she is therefore not obligated to use one specific technology, style, platform and/or tool (IDE).
 
JEE
 
Java Platform, Enterprise Edition or Java EE is a widely used platform for server
programming in the Java programming language. The Java platform (Enterprise Edition) differs from the Java Standard Edition Platform (Java SE) in that it adds libraries which provide functionality to deploy fault-tolerant, distributed, multi-tier Java software, based largely on modular components running on an application server.
Java EE is defined by its specification. As with other Java Community Process specifications, providers must meet certain conformance requirements in order to declare their products as Java EE compliant.
 
Java EE includes several API specifications, such as JDBC, RMI, e-mail, JMS, web services, XML, etc, and defines how to coordinate them. Java EE also features some specifications unique to Java EE for components. These include Enterprise JavaBeans, Connectors, servlets, portlets (following the Java Portlet specification), JavaServer Pages and several web service technologies. This allows developers to create enterprise applications that are portable and scalable, and that integrate with legacy technologies. A Java EE application server can handle transactions, security, scalability, concurrency and management of the components that are deployed to it, in order to enable developers to concentrate more on the business logic of the components rather than on infrastructure and integration tasks.
 
Maven
 
Maven's primary goal is to allow a developer to comprehend the complete state of a development effort in the shortest period of time. In order to attain this goal there are several areas of concern that Maven attempts to deal with:
  • Making the build process easy
  • Providing a uniform build system
  • Providing quality project information
  • Providing guidelines for best practices development
  • Allowing transparent migration to new features
Ant
 
Ant is a Java-based build tool. In theory, it is kind of like Make, without Make's wrinkles and with the full portability of pure Java code.
 
Hudson
 
Hudson monitors executions of repeated jobs, such as building a software project or jobs run by cron. Among those things, current Hudson focuses on the following two jobs:
  1. Building/testing software projects continuously, just like CruiseControl or DamageControl. In a nutshell, Hudson provides an easy-to-use so-called continuous integration system, making it easier for developers to integrate changes to the project, and making it easier for users to obtain a fresh build. The automated, continuous build increases the productivity.
  2. Monitoring executions of externally-run jobs, such as cron jobs and procmail jobs, even those that are run on a remote machine. For example, with cron, all you receive is regular e-mails that capture the output, and it is up to you to look at them diligently and notice when it broke. Hudson keeps those outputs and makes it easy for you to notice when something is wrong. 
Nexus
 
Nexus manages software "artifacts" required for development, deployment, and provisioning. If you develop software, Nexus can help you share those artifacts with other developers and end-users.
Maven’s central repository has always served as a great convenience for users of Maven, but it has always been recommended to maintain your own repositories to ensure stability within your organization. Nexus greatly simplifies the maintenance of your own internal repositories and access to external repositories. With Nexus you can completely control access to, and deployment of, every artifact in your organization from a single location. Now you can setup a Maven Repository in just minutes with Nexus.

Tools

Eclipse
 
Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle. The Eclipse Foundation is a not-for-profit, member supported corporation that hosts the Eclipse projects and helps cultivate both an open source community and an ecosystem of complementary products and services.
 
JDeveloper
 
Oracle JDeveloper is a free integrated development environment that simplifies the development of Java-based SOA applications and user interfaces with support for the full development life cycle.
 
Netbeans
 
The NetBeans IDE is an award-winning integrated development environment available for
Windows, Mac, Linux, and Solaris. The NetBeans project consists of an open-source IDE and an application platform that enable developers to rapidly create web, enterprise, desktop, and mobile applications using the Java platform, as well as JavaFX, PHP, JavaScript and Ajax, Ruby and Ruby on Rails, Groovy and Grails, and C/C++.
IntelliJ
 
IntelliJ IDEA is a code-centric IDE focused on developer productivity. IntelliJ IDEA deeply understands your code and gives you a set of powerful tools without imposing any particular workflow or project structure. IntelliJ IDEA is your dream pair-programmer who knows its way around the codebase, makes great suggestions right when you need them, and is always ready to help you shape your code.
 

Oracle Info

More info about Oracle Java Developer