JVM monitoring vendor Plumbr has added slow query detection to its flagship product. With this addition, Plumbr now detects four types of problems: Memory Leaks, Garbage Collection Inefficiencies, Locked Threads and Expensive JDBC Operations.
Salesforce.com has open sourced Phoenix, a Java layer enabling developers to run SQL queries on Apache HBase. Update: An interview on Phoenix with James Taylor, Lead Developer at Salesforce.com, has been appended.
While JRuby on Rails doesn't have ActiveRecord, DataMapper, an ORM often used with Merb, has gained a new adapter for Google App Engine's DataStore. Also: work on Reggae, automatic tooling for deploying Rack apps on GAE is under way.
Kasper Sørensen has created a new open source project at eobjects.dk called MetaModel. The project is a common domain model, query engine, and optimizer for different types of datastores, such as relational databases and flat files. MetaModel is a Java library that provides a fluent, object-oriented interface for SQL compliant queries.
JRuby project lead Charles Nutter discusses how he got involved with JRuby, Sun's involvement with JRuby, how JRuby fits into enterprise-level web applications, the possibility of a friendly fork of the OpenJDK source code, reasons for switching to JRuby, the future of JRuby, Spring and JRuby, and the Ruby community as a whole.
Azadeh Ahadian of IBM has published an article introducing JLINQ on IBM's developerWorks site. Despite the name, JLINQ does not have much in common with Microsoft's LINQ, rather it is an Eclipse plugin providing integration with a database and runtime DAO code generation. The plugin is part of IBM's Developer Workbench that is coming with Viper, the next release of DB2.
HSQLDB creator Thomas Mueller has released 1.0 final of H2, his pure Java database successor to HSQLDB. H2's focus is to be best database for the lower end (low number of concurrent connections, embedded usage). InfoQ spoke to H2 creator Thomas Mueller to find out more.
A heated debate started a few weeks ago initiated by members of the Hibernate team, arguing that using an abstraction framework on top of an ORM is a bad idea, citing Spring's HibernateTemplate as a specific example. Along the theme of levels of abstraction, Brian McCalister also surveyed various convenience frameworks over JDBC.
Java 6.0 will include a number of Java Database Connectivity enhancements collectively known as JDBC 4.0. One of the main goals of JDBC 4.0 was to try and reduce the amount of boilerplate JDBC code a developer had to write.
HSQLDB creator Thomas Mueller recently released the v0.9 of H2, his pure Java database successor to HSQLDB. H2 benchmarks significantly faster than HSQLDB, supports JDBC and ODBC, supports XA, can be clustered for HA and supports encryption.
The latest version of JRuby will be presented to JavaOne attendees this week. Included in the demonstrations is a working Rails application and an ActiveRecord adapter backed by JDBC.