db4o db4o is an object database available for Java and for .NET, including CompactFramework and Mono.
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Java object database object database API store objects db4o

db4o Description

db4o is an object database available for Java and for .NET, including CompactFramework and Mono. db4o is designed to be a simple, easy-to-use, and fast, native object database. Software developers using popular Java and .NET object-oriented frameworks know that using object databases is a more natural way to get work done. Developers have three ways to storing and retrieving data: relational, non-native object and native object.Relational databases, such as Oracle, IBM's DB2 and Microsoft's SQL server, store data in a tabular, row-and-column metaphor. The organization of traditional data in a relational database is easy to understand. The concept took off and today most data is stored in relational databases.However, as object-oriented models became popular, developers were spending time trying to map objects into a relational database. Today, developers are forced to rely on relational-to-object mappers, but this technology compromise adds a layer of complexity and degrades performance. It is best suited for organizations that rely on legacy data.Non-native object databases came on to the market in the early 1990s with great fanfare. But their promise was largely unfulfilled. Developers found the technology expensive, complex and hard to use. The first native object databases had similar shortcomings.db4o is based on new native object database technology. db4o offers .NET and Java developers the simplest and easiest way to store objects. db4o is the only native object database designed for both Java and .NET, supplied as one single programming library (Java: .jar /.NET: .dll) to be included with developer applications. Here are some key features of "db4o":· One line of code to store objects· Native Java / .NET· Class model == database schema· Smooth production process· Automatic schema versioning· Query by example· S.O.D.A. active queries· 250kB footprint· Saves more than 50% costs to develop your application· Saves more than 50% time to release your application· No need for training and administration· Build lean, structured and manageable code· Improve your software lifecycle with better refactorability and re-useWhat's New in This Release:· This development build includes a new embedded Client/Server mechanism that comes with the same performance-and resource-consumption-characteristics as single user local mode.· This build has undergone very heavy stress testing on multi-core machines and with large numbers of clients.· The core code has been branched, and the 6.4 branch will be maintained to become 'production' and 'stable' quality.

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