Free ejb software for linux

NetBeans IDE is a full-featured integrated environment for Java application developers.
Java programmers require a fast and fully-featured Integrated Development Environment (IDE) with support for Java(TM) compliant applications for accelerating development across all major OS platforms.
NetBeans.org provides an open source, high performance, modular, extensible, multi-platform Java IDE to accelerate the development of Java applications, web services and mobile applications.
The NetBeans IDE 4.1, which was released in May 11, 2005, includes Java 2 Platform, Enterprise Edition (J2EE) development capabilities. This new release allows developers to not only develop applications in the web tier but also includes Enterprise JavaBeans (EJBs) and web service development capabilities.
NetBeans IDE 4.1 is a single platform with out-of-the-box development capabilities and support for enterprise (J2EE 1.4) applications and web services, mobile/wireless Java 2 Platform, Micro Edition (J2ME) applications and services and desktop Java 2 Platform, Standard Edition (J2SE) applications. The robust open source Java IDE, has everything that Java Software Developers need to develop cross-platform desktop, web and mobile applications straight out of the box.
When you download the NetBeans IDE, you get a modular, standards-based development environment with all the key functionality in one download, rather than a series of additional plug-ins. Write, compile, debug and deploy Java programs for the Solaris, Windows, Linux and Macintosh platforms.
Main features:
- New Navigator component facilitates browsing and navigating around classes.
- Browse and configure project classpath using the Libraries node in the Projects View.
- Use automatically generated Debug and Compile Single File actions for projects with existing build scripts.
- Set up projects with multiple source roots.
- Create a J2EE application, automatically add EJB?* and Web modules, then deploy the application.
- Deploy an EJB module as a stand-alone or packaged in a J2EE application. Or, create a Web module, generate calls to EJBs and deploy the Web module either as a stand-alone Web application or packaged in a J2EE application.
- Create Session Beans, Entity Beans and Message-Driven Beans. Entity Beans can be created using an existing database schema.
- Create, register and test Web Services.
- Visually configure your EJBs, Web Services and Web Components.
- Validate your applications using the J2EE Verifier.
- Use the integrated Java BluePrints Solution Catalog as a powerful learning resource.
- J2SE 5.0 "Tiger" Language Support - We support the new Java language constructs such as enums, generics, metadata annotations, autoboxing, static imports and others. These new constructs are supported when doing editing, building, refactoring, etc. of your applications. This support is available without any additional setup when running on J2SE 5.0.
- Project System based on Apache Ant - NetBeans 4.0 was the first IDE to base its projects system entirely on Apache Ant, allowing developers to easily share build scripts between teams and ensure that automated builds run the same as builds within the IDE. There is no vendor lock-in and no proprietary file formats.
- Refactoring technology which provides simplified code maintenance for developers.
- Visual enhancements to lay out MIDlets workflow; plus, design and code the GUI using a drag and drop feature (Available in NetBeans Mobility Pack).
- End-to-end support for enterprise applications with wizard support for creating Java? 2 Platform, Micro Edition (J2ME?) and J2EE applications. This updated support enables quick creation of J2ME client/server applications (Available in NetBeans Mobility Pack).

OpenSubsystemss goal is to provide consistent set of business components that solve particular area of interest such as inventory management, order processing, shopping, email and fax communication, document management, imaging and others.
There are many frameworks and libraries attempting to make life of developers easier. Most of them focus on improving certain technology (EJB) or technical problem such as persistence in Java (Hibernate) or view tier for web applications (Struts).
There are very few that actually give developers fully functional business components that are immediately available to be integrated into their application and solve specific business needs. OpenSubsystems is one of them.
OpenSubsystems is dedicated to providing highest quality products by paying attention to innovative design, carefull implementation and thorough testing while staying true to the spirit of open source.
All our development processes and products are extensively documented and available for review and use to wide audience of business analysts, developers and testers.
Enhancements:
Feature requests
Core
- 1674491Generalize DataFactory interfaces by requiring domain id
- 1674470Simplify DatabaseOperation classes by removing redundant arguments
- 1674438Simplify DatabaseSchema interface/impl for read-only schemas
- 1674289Change license to GPL v2 only for Core
Bugs
Core
- 1674498IOException thrown by FileUtils when directory exists
- 1674495NullPointerException in StringUtils.concat method
- 1674483Servlet preservice method not called when login is required
- 1674420NullPointerException in DatabaseConnectionFactoryImpl class
- 1630270NoSuchElement exception when using XAPool

EasyBeans is an implementation of an EJB3 container. EasyBeans library aims to provide an implementation for the full EJBCore API.
For the persistence matter, it relies on Hibernate EJB 3 or, in upcoming versions, on Speedo, the ObjectWebs JDO implementation.
it is divided in three parts :
- Core part
- Persistence part (Which is the persistence provider)
- Simplified specification : it contains new features.
Enhancements:
- EAR deployment (and undeployment) is now supported in JOnAS, Tomcat, and Jetty.
- For JOnAS, if the EAR contains EJB 2.1 components, they will be deployed in the EJB 2.1 container.
- The WAR files of the EAR will be deployed in the Tomcat or Jetty Web container.
- An ear example is provided in this version.
- The timer service which is based on the Quartz component is supported.
- A timer example is provided.
- OpenJPA is supported as a persistence provider.

jZeno is a meta-project that integrates a collection of java open source libraries, to form a ready-to-use web development environment. jZeno is made to allow people to create web applications by using pure java development as much as possible. The main architectural goal of Largely reducing the need to know technologies like javascript, HTML, CSS, database specific SQL, and tons of different APIs.
Limiting the amount of APIs, technologies and programming styles allows developers to learn a smaller set of skills much deeper. We think this set of skills should be : a thorough understanding of java, OO development and design patterns.
We decided to create jZeno after growing more and more frustrated with JSP and Struts over the years. We hoped JSF would improve things but have come to the conclusion that it is mainly a commercially-driven API that does not really make development life any easier. So we started looking further and came across Echo, a toolkit for developing web applications in pure java. In a nutshell Echo provides you with an implementation of the Swing API for developing web applications. We have created an optimized version of the Echo toolkit to allow partial, and highly compressed updates of web pages, providing AJAX like performance (available in the upcoming 0.9 release).
While Echo provides an easy way of creating the presentation layer of a web application, some glue was still missing to turn it into a rapid development platform. So we decided to add a set of easy to use dynamic components, that provide an easy way to do data-binding, validation, event handling and such. Many useful components are also provided by the EchoPoint library, a collection of rich Echo components.
Besides the presentation layer jZeno also provides a number of services for facilitating the creation of business facades. This environment is similar to stateless session beans in the EJB specification, but witout the overhead of EJBs. These services include transaction management, dead-lock detection and retrying, performance monitoring, security checking, etc...
jZeno also uses Hibernate for O/R mapping inside you business facades. Besides these major functions jZeno contains out-of-the-box solutions for a host of other features any real-life web application needs. This inluces things like genrating reports in a pdf,xls,rtf and other formats (through JasperReports). It also includes live performance monitoring (JAMon) and heap monitoring of your application in its production environment, among other features...
jZeno applications have a traditional layered architecture. The tradidional 3 tiers are seperated : the presentation tier, the business tier and the domain model. The first tier is created by using the jZeno dynamic components and the lower level Echo and EchoPoint components. The business tier contains support for running your business logic, decorated with a stack of aspects that together create an environment very similar to stateless session beans (but with less requirements and configuration overhead). The domain model tier is basically the O/R mapping provided by Hibernate. jZeno provides a tightly integrated environment for all these tiers. In the future support for deploying on an EJB container may be added if required.
Enhancements:
- A bug in errormessagescomponent (warnings) has been fixed.
- Validation has been fixed to pre-render/rebind invisible pages on DynaTables before validation.
- The TTL for DNS caching has been set to a maximum of 5 minutes.
- SessionSyncFilter will always serialize unless using an image/script service.
- A McKoi startup bug when using hibernate annotations has been fixed.
- Processing of radio buttons with action listeners has been fixed.
- BigDecimalViewer and ComponentUI have been added for consistency.
- A bug in the NewsTicker component has been fixed.

Sequoia is a transparent middleware solution for offering clustering, load balancing and failover services for any database. Sequoia is the continuation of the C-JDBC project.
Sequoia database is distributed and replicated among several nodes and C-JDBC balances the queries among these nodes. Sequoia handles node failures and provides support for checkpointing and hot recovery.
C-JDBC is a database cluster middleware that allows any Java application (standalone application, servlet or EJB container, ...) to transparently access a cluster of databases through JDBC.
C-JDBC handles node failures and provides support for checkpointing and hot recovery.
Main features:
- No modification of existing applications or databases,
- High availability provided by advanced RAIDb technology,
- Performance scalability with unique load balancing and query result caching features,
- Integrated JMX-based administration and monitoring,
- 100% Java implementation allowing portability across platforms,
- Open source licensed under LGPL,
- Professional support, training and consulting available from C-JDBC professional services.
Whats New in 2.10.9 Stable Release:
- This release fixes a compatibility problem between Appia and Hedera that was introduced by the previous release.
- The 2.10.8 release was delivered with an incorrect appia.jar (3.2.3).
Whats New in 3.0 Beta 2 Development Release:
- This release includes a long list of feature improvements and bugfixes.
- A new embedded recovery log has been implemented for a transactional log without configuration.
- New demos are based on these new features.
- Other usability improvements and performance enhancements are also part of this release.

Simple persistence for Java is an object/relation mapping framework for Java. It is designed to be easy to use.
There are no XML files to write, no tables to create, no IDs to generate, and no primary keys to fiddle with; just point it to the database, check the API documentation for three basic methods, and code away.
Simple persistence for Java supports transactions, has its own simple query language (very similar to SQL), and can handle object references, lists, and maps.
You may ask: Why another O/R mapping library? Well.. Ive searched the net for a suitable O/R tool for a long time now, also tried a few in live projects, but each time, at the end of the project, I had always had a few thoughts to simplify the database interaction code. Ive started with EJB around 2000. Now, I think everyone who used EJBs also at least once wondered why saveing a friggin object requires a separate server installation, the extensive knowledge of a 200+ page documentation, generating 3 classes/interfaces per object, installing stubs, rmi, and other things I dont even want to know about. Lets just skip this chapter of my life directly to my last experience with an O/R library: pbeans. This library is generally good, I can recommend it for those, who want a stable O/R mapping tool, but it was not the one for me. I found a few points I couldnt get over:
- Save and insert should be one method. I usually dont care if an object is inserted or saved phisically, as long as its saved.
- It should handle Lists and Maps. Well, "Lists should be enough for everybody", but sometimes Maps are handy too. Lists are used very often, I think it should be handled automatically.
- The query code is too difficult, and at the same time does not offer enough features.
- The code you have to write wont be "pretty". It requires classes to be parameters, at least for queries, and I cant read the query itself.
- The Id handling is not transparent.
Enhancements:
- A major scalability feature has been added: the library is now capable of working in a distributed environment, such as load-balanced Web server clusters.
- All the library nodes connected to the same database will form a self-regulating, self-organizing, failure-tolerant network to manage exclusive resources (such as locks, etc).
- The documentation and site were updated accordingly.