The Envers project aims to enable easy versioning of persistent JPA classes. All that you have to do is annotate your persistent class or some of its properties, that you want to version, with @Versioned. For each versioned entity, a table will be created, which will hold the history of changes made to the entity. You can then retrieve and query historical data without much effort.
Similarly to Subversion, the library has a concept of revisions. Basically, one transaction commit is one revision (unless the transaction didn't modify any versioned entities). As the revisions are global, having a revision number, you can query for various entities at that revision, retrieving a (partial) view of the database at that revision.
The goal of Autofetch is reduce the modularity penalty and programmer burden of specifying associations which should be loaded with an object query. These specifications are sometimes are called fetch profiles, prefetch directives, or joins. These specifications are an important performance optimization because they reduce the number of round-trips to a persistence store whether that be a relational database, object database, or flat file. Autofetch is a library which integrates with object persistence tools and automatically handles prefetching data. Using dynamic program profiling, Autofetch determines the right prefetch directives for each query a program executes.
What is Ebean?
Ebean is a Object Relational Mapping Persistence Layer written in Java (Open Source LGPL license).
* Providing the features of EJB3's JPA (and more)
* No container required
* JPA compatible ORM mapping (@Entity, @OneToMany, ...)
Why use Ebean?
Ebean provides a simpler approach to Object Relational Mapping. It does this by not requiring session objects such as JPA EntityManager, JDO PersistenceManager, Hibernate Session, Toplink ClientSession.
dt-Source
This is a taglib providing connection between Displaytag taglib and data sources, allowing to load partial lists from different sources, like Hibernate, JDBC, etc. Requires Spring framework.
During the project growth, it's getting new functionality and features like filters, searches, etc. completely customizable with CSS.
The most of the code was written by Olexiy Prokhorenko with some help from Olexandr Prokhorenko and later was donated to Open Source Community. We support this project free of charge but we welcome donations. :)
Remember when the Object database was going to kill the Relational database?
OOP was the sexy programming model, and relational set theory seemed so quaint. Once you are using Objects, why wouldn’t you just want to persist them instead of having to drop down to this crazy SQL? Inner joins instead of just person.name.first? Fools.
SymmetricDS is web-enabled, database independent, data synchronization/replication software. It uses web and database technologies to replicate tables between relational databases in near real time. The software was designed to scale for a large number of databases, work across low-bandwidth connections, and withstand periods of network outage.
jLynx is a simple, lite, hi-performance layer over the JDBC API. Persist and retrieve POJO and Map objects directly. Designed for developer productivity. Simpler, easy to learn, easy to configure as compared to Hibernate, JPA, etc.
jLynx generates JavaBean objects based on your database schema. For example if you have 24 tables and views in your database, jLynx will create 24 objects with properties that map to the field names in each table. The jLynx Generator creates the objects and compiles them. You can also use the generated source instead if you prefer to customize the objects. Using the API to persist objects is trivial.
jLynx Framework implements the Relational interface, which has all necessary methods to persist objects and fetch entire collections of objects.
jLynx leverages the strengths of SQL and the strengths of Java without having to write/maintain J2EE code. It is truly the best of both worlds.
log4jdbc is a JDBC driver that can log SQL and/or JDBC calls (and optionally SQL timing information) for other jdbc drivers using the Simple Logging Facade For Java (SLF4J) logging system.
SQL Workbench/J is a free, DBMS-independent, cross-platform SQL query tool. It is written in Java and thus it should run on any operating system that provides a Java Runtime Environment.
It's main focus is on running SQL scripts (either interactively or as a batch), graphical query building or administration of the database is not the focus.
Do you hate starting on a new project and having to try to figure out someone else's idea of a database? Or are you in QA and the developers expect you to understand all the relationships in their schema? If so then this tool's for you.
SchemaSpy is a Java-based tool (requires Java 1.4 or higher) that analyzes the metadata of a schema in a database and generates a visual representation of it in a browser-displayable format. It lets you click through the hierarchy of database tables via child and parent table relationships. The browsing through relationships can occur though HTML links and/or though the graphical representation of the relationships. It's also designed to help resolve the obtuse errors that a database sometimes gives related to failures due to constraints.
DB Schema Viewer is an Eclipse plugin that builds a graphical view of an existing database. Reverse Engineering is performed through JDBC. The most popular databases are currently supported:
* MySQL
* PostgreSQL
* Firebird
QuantumDB is a simple but powerful database access plug-in for the Eclipse Development Platform. QuantumDB allows you to:
* connect to databases using standard JDBC drivers
* review schemas, tables, views and sequences
* look up column, index and foreign key information
* issue ad-hoc queries or other SQL statements against the database
* manage, edit, and work with SQL files (*.sql)
* issue updates, deletes, and inserts using simple, easy-to-use wizards
Eclipse SQL Explorer is a thin SQL client that allows you to query and browse any JDBC compliant database. It supports plugins with specialized functionality for individual databases (Oracle, DB2 and MySQL) and can be extended to include specialized support for other databases.
This article presents with an solution on how to page through large amountsofdata effectively without taking down your database and without keeping it all in memory.
Scriptella is an open source ETL (Extract-Transform-Load) and script execution tool written in Java.
Our primary focus is simplicity. You don't have to study yet another complex XML-based language - use SQL (or other scripting language suitable for the data source) to perform required transformations.
SchemaCrawler is a command-line tool to output your database schema and data in a readable form. The output is designed to be diff-ed with previous versions of your database schema. SchemaCrawler is also an API that improves on the standard JDBC metadata.
Application Ermodeller is a free CASE tool for data modelling which is built in Java. This tool supports conceptual and logical data modelling and in the final step, it allows to create physical model that is specific for particular DBMS.
The basic idea is to support development of database via ER modelling in three levels of abstraction:
* conceptual
* logical
* physical
This separation allows to create database model independent on the particular database system. You may create conceptual model and logical model that are independent on any DBMS. Then, you may generate physical model for each DBMS you will use. Afterwards, physical models allows you to generate SQL data definition for your target DBMS.
Develop a java-based tool that manages the life-cycle of the database schema and generates code and documentation artifacts. The tool transforms an XML description of a database schema into an HTML data dictionary, SQL scripts to create the database, and Java data access code. The tool automatically updates the documentation, scripts, and code as the schema is changed and updated. The tool also provides a simple but powerful data access programming model and framework for developing custom data access code. The generated Java code conforms to the Data Access Object (DAO) and Value Object (AKA Data Transfer Object) patterns that are described in the J2EE Java Blueprints.
Extrema is a powerful visualization and data analysis tool that enables researchers to quickly distill their large, complex data sets into meaningful information. Its flexibility, sophistication, and power allow you to easily develop your own commands and create highly customized graphs.
The Sundog Database Refactoring Tool (SDRT) is an open source (LGPL), DBMS-independent library that eases database development, particularly in an agile environment.
MIGRATEdb will parse an XML file of database changes and load them to the targeted database if they are not already there.
A database change consists of tests to determine whether the change has already been applied and a set of change actions.
dbdeploy is a Database Change Management tool. It helps developers and
DBAs change their database in a simple, controlled, flexible and
frequent manner
JPOX is a free and fully compliant implementation of the JDO1, JDO2 specifications, providing transparent persistence of Java objects. It supports persistence to all of the major RDBMS on the market today, persistence to the DB4O object datastore, supporting all of the main Object-Relational Mapping (ORM) patterns demanded by today's applications, allows querying using either JDOQL, SQL, or JPQL, and comes with its own byte-code enhancer. JPOX is available under the Open Source Apache 2 license, allowing access to not just a top quality Java persistence implementation but also to the source code, allowing you to contribute to the success story of the principal standards-compliant Open Source persistence implementation in the world today.
SuperQuaiL is a Java SQL query builder. The goal of SuperQuaiL is to help Java developers who code SQL run and create queries easier. Other database tools focus on making it easy to do database administration and it is nice to be able to inspect the database through these tools. PhpMyAdmin, for example, a is nice web front end that you can run from multiple computers, but the interface is clumsy for the developer. For development, building queries is the main task and having a small program that loads quickly is more helpful than having a complicated interface where you can find out almost anything about the database. SuperQuaiL provides nice features to aid in the process of developing queries quick and easy.
Jackcess is a pure Java library for reading from and writing to MS Access databases. It is not an application. There is no GUI. It's a library, intended for other developers to use to build Java applications. Jackcess is licensed under the GNU Lesser General Public License. Take a look at our Frequently Asked Questions for more info.
LIMBAS is a web client/server application allowing you to develop application quickly without programming. This, only by the use of tables and forms and other modules like workflow engine, user management, report editor, file manager or soap interface.
An outstanding feature is complete use with an Internet-Browser without installations, Plugins or other components on the client.
Talend has the most open and powerful data management solutions available as a packaged, out-of-box, ready-to-install platform.
Talend's fundamental technology breaks with the market's leading proprietary solutions, associated with the open source model, significantly modifying the rules of the game in the data integration market.
The goal is to create an eclipse plugin to design and edit entity relationship diagrams. On the other side, the plugin should also be able to create SQL and Java-Code (Hibernate) out of the diagrams.
DBMT is a easy to use tool for migrating one database from a sources of data (RDBMS, CSV, XML and so on) to another changing database's schema if necessary.
The Pentaho BI Project provides enterprise-class reporting, analysis, dashboard, data mining and workflow capabilities that help organizations operate more efficiently and effectively. The software offers flexible deployment options that enable use as emb
Open System Architect (OSA) is an application used for modelling a system. OSA currently supports data modelling (physical and logical) with UML in the works. The unique thing about OSA is that it is an Open Source product licensed under the General Publi
XML to DDL is a set of python programs to convert an XML representation of a schema into a database and vice versa. It can also examine the differences between two databases and emit the ALTER DDL statements required to bring the database up-to-date. This
The JDBC Importer provides a consistent mechanism of importing data from files into a JDBC compliant database. Currently, each database vendor has their own utility or command that must be learned. Additionally, there are some limitations and caveats abou
Unter fachlicher Leitung des Fraunhofer IPK hat der Arbeitskreis Wissensbilanz in Zusammenarbeit mit der incowia GmbH die Microsoft Windows basierte Softwareanwendung "Wissensbilanz-Toolbox" entwickelt. Die Software unterstützt kleine und mittelständisc
This Guide will introduce you to using Oracle for several basic tasks, as well as how to configure the Oracle environment and use special features of its user interface. This guide is divided into the following sections:
Finding the best approach when accessing a database from Java can be a daunting task. The most common solution is to program directly to the JDBC (Java Database Connectivity) APIs. The result is hard-to-read source files, bloated with complex code that ha
The iBATIS Data Mapper framework makes it easier to use a database with Java and .NET applications. iBATIS couples objects with stored procedures or SQL statements using a XML descriptor. Simplicity is the biggest advantage of the iBATIS Data Mapper over
The Generic Model Organism Database (GMOD) Project is a largely open source project to develop a complete set of software for creating and administering a model organism database. Components of this project include genome visualization and editing tools,
FreeQueryBuilder allow you to create SQL queries without directly writing SQL. You can add or remove tables and add, remove or modify joins between tables. Also, specify: data columns for output, the sort order for the query, search conditions, grouping c
JGrinder is a framework for mapping Objects in Java to various persistent stores. These include relational databases, in memory 'storage', and flat files. The architecture allows additional persistent stores to be supported (such as storing objects over a