InfoQ Homepage Data Access Content on InfoQ
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Gemstone OODB to support JRuby, Rubinius
Gemstone is working on Ruby support for their Object Database products, starting off with JRuby. We talked to Alan McKean from Gemstone about what's to come, technical details and Gemstone's plans with Rubinius.
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Google Base vs. Microsoft's Astoria
Dare Obasanjo has done a comparison of two new protocols for access database style data via HTTP. These protocols, based on REST, are the Google Base and Microsoft's Astoria.
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Kevin Halverson: How to implement IQueryable
In a two-part series, Kevin Halverson has demonstrated how to create a LINQ provider by implementing the IQueryable and IQueryProvider interfaces. Specifically he uses the Windows Desktop Search as a data source.
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MERGE Syntax for SQL Server 2008
SQL Server 2008 will include new syntax for merging data between two rowsets. The MERGE statement allows developers to use one command to perform deterministic inserts, updates, and deletes on a table based on a source table.
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Opinion: SOA doesn’t need a Common Information Model
Loose coupling is not just about using a common syntax and protocols, it is also about creating and managing a set of shared semantics. Let’s take a quick look at the differences between a common information model and shared semantics and decide which one you are more likely to use in a service oriented architecture.
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XQuery Java API JSR 225 Available for Public Review
The first public review draft of JSR 225: XQuery API for Java has been posted for review. The spec (being led by Oracle) aims to provide ubiquitous programmatic access for XQuery implementations in Java.
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Apache Derby Releases 10.3 Beta and Gains Experimental Hot Standby Replication
The Apache Derby project has made a beta available of the upcoming 10.3 release. The 10.3 release includes security enhancements, language-based ordering, other features, bug fixes, and performance enhancements. Egil Sørensen, a student at the Norwegian University of Science and Technology, has also submitted his MS thesis work to add hot standby replication functionality to Derby.
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OpenJPA adopted by both IBM and BEA; becomes top-level Apache project
Apache OpenJPA has been gaining momentum in the JEE world, having been adopted by BEA as the EJB3 JPA implementation in WebLogic Server 10 and in the most recent EJB3 Feature Pack for IBM WebSphere Application Server. OpenJPA started its life in BEA's Kodo product, whose code was donated to the ASF in 2006; the project just recently graduated from the Apache Incubator as well.
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Hibernate Search: Indexed Full Text Search of your Domain Model
The second beta of the new Hibernate Search project was recently released. InfoQ spoke to project lead Emmanuel Bernard to find out more. The Hibernate Search project is aimed at users of Hibernate or JPA that want to make their Hibernate/JPA-managed objects accessible via indexed, full-text search.
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Debate: ODBMS sometimes a better alternative to O/R Mapping?
In a recently released article on ODBMS.org, Ted Neward elaborated upon his idea that Object/Relational Mapping (ORM) is the Vietnam of Computer Science. Ted says that OODBMS' are better than RDBMS' for some types of apps. A number of people weighed in to the debate, including Hibernate founder Gavin King.
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Java and .NET Libraries for Open XML
With the new OpenXML format, there is the promise of an clean and efficient way to manipulate Office documents via XML. But with a 6000+ page spec, finding the exact nodes one needs to manipulate is a non-trivial task. To address this, OpenXML libraries for both Java and .NET are in the works.
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Entity Services - Pattern or Anti-pattern?
Entity Services or business-centric entities are considered by some to be a corner stone of Service Oriented Architecture - however not everyone agrees with this view. So are Entity Services a pattern or an anti-pattern for SOA?
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Article: Using Java to Crack Office 2007
Office file manipulation used to be difficult, but since Office 2007, Word, Excel and Powerpoint files can be read and written without anything more complicated than the native JDK itself because Office 2007 documents are now nothing more than ZIP files of XML documents. Ted Neward demonstrates this in action.
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Interview: LINQ Creator Erik Meijer
In this InfoQ interview, LINQ creator Erik Meijer talks about the design and capabilities of LINQ, how to use it, why to use it, how it differs from XQuery, how it addresses ORM, extension methods, EDM, and more.
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Jasper: ORM without Code Generators or Configuration Files
Jasper is Microsoft's new ORM project designed for rapid application development. And unlike earlier Microsoft projects, this one does not require code generators. The goal? To "make the experience of developing quick and dirty database apps one that is truly quick and clean."