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There is no migration system in vanilla grails (although possibly in Grails 2.0 …. ?) but there do exist several plugins that provide  some migration functionality. As of this post I am aware of three: dbMigrate, Liquibase, and Autobase. Of these, I prefer Liquibase and cannot recommend it enough. While it uses XML to describe its changesets it is a mature open-source Java project that works flawlessly (and has some excellent documentation). I did not have much luck using DbMigrate and Autobase when including in an existing project… which is a shame as Autobase (which is built on Liquibase) uses a nice DSL syntax to build the migrations.

"Neo4j is a graph database. It is an embedded, disk-based, fully transactional Java persistence engine that stores data structured in graphs rather than in tables. A graph (mathematical lingo for a network) is a flexible data structure that allows a more agile and rapid style of development."

Apache ServiceMix is an open source ESB (Enterprise Service Bus) that combines the functionality of a Service Oriented Architecture (SOA) and an Event Driven Architecture (EDA)  to create an agile, enterprise ESB. Apache ServiceMix is an open source distributed ESB built from the ground up on the  Java Business Integration (JBI) specification JSR 208 and released under the Apache license. The goal of JBI is to allow components and services to be integrated in a vendor independent way, allowing users and vendors to plug and play.

A few weeks back, I wrote a blog entry lamenting the attitude toward IDEs in the Scala community. A few people told me that the tooling situation was better than I'd implied, so I thought I'd spend a bit of time looking at using Scala (and Lift specifically) in Eclipse. I think the situation is still a ways away from the tooling situation for Java, but it is actually quite good, and I wanted to post a quick tutorial for those interested in developing Lift in Eclipse. Prerequisites This post assumes that you already have Scala 2.8 final and Eclipse 3.6 on your system. For Eclipse, I recommend upping the Xmx setting if you haven't already - I had issues when I had multiple Lift projects imported with Xmx set to 386. Also, this tutorial is going to use Maven, not SBT. SBT may be a better build tool for Scala projects, but I'm not sure how well it works with m2eclipse - I'm going to play with that more later. I also assume you know how to install plugins into Eclipse - I will create a more in-depth screencast for doing all of this if there is enough interest.

"Besides a rich user interaction many applications need to display a big amount of data sets as diagrams or reports as part of their applications. In order to bridge the gap the BIRT project was created as part of the eclipse ecosystem. BIRT is an open source Eclipse-based reporting system that integrates with your Java/J2EE application to produce compelling reports. That BIRT integrates well with classic RCP applications is a well known fact. But the need for rich internet applications is still growing. And here the RAP comes into play. As a platform for developing Web 2.0 applications with the same patterns as for RCP it paves the way for single sourcing applications running on both platforms. In this talk we will show how to integrate diagrams and reports known from BIRT into RAP applications. Topics covered include how to setup the environment to let BIRT and RAP play well together. In addition we will give advices how to use the reports inside RAP applications and which problems may arise. As a final outcome of we will know everything to bring reporting capabilities into RAP applications. "

"a simple java reporting runtime, capable of running birt reports on google app engine (gae). "

"Business Intelligence and Reporting Tools BIRT is an open source Eclipse-based reporting system that integrates with your Java/J2EE application to produce compelling reports. Get started with the newest major release, BIRT 2.6.1. Get started with the latest in the BIRT 2.5 series. Need help with BIRT? BIRT provides core reporting features such as report layout, data access and scripting. Please try BIRT and tell us what you think by filling bugs reports & enhancement requests through Bugzilla as explained on the community page. "

"Logback is intended as a successor to the popular log4j project, picking up where log4j leaves off. Logback's basic architecture is sufficiently generic so as to apply under different circumstances. At present time, logback is divided into three modules, logback-core, logback-classic and logback-access. The logback-core module lays the groundwork for the other two modules. The logback-classic module can be assimilated to a significantly improved version of log4j. Moreover, logback-classic natively implements the SLF4J API so that you can readily switch back and forth between logback and other logging frameworks such as log4j or java.util.logging (JUL). The logback-access module integrates with Servlet containers, such as Tomcat and Jetty, to provide HTTP-access log functionality. Note that you could easily build your own module on top of logback-core. "

Tutorial and Example on how to integrate Java, Spring, Hibernate and MySQL

Sample of using Hibernate Annotations by reducing XML configuration files thus making it simpler to define required metadata directly into our Java code. When using annotations, we no longer need the additional mapping file (*.hbm.xml). The metadata for the ORM is specified in the individual classes.

Emfatic is a text editor supporting navigation, editing, and conversion of Ecore models, using a compact and human-readable syntax similar to Java. The EPLed Emfatic now hosted at EMFT extends the Feb 2005 alphaworks release with support for EMF Generics, folding, "red squigglies", an EMF Type Hierarchy, hyperlinks, AutoEdits, and the possibility to define templates to speed up document creation, among other usability features. The best way to gain hands-on experience with Emfatic is to right-click on any .ecore file and choose Generate Emfatic source, a similar converter works in the opposite direction. Online help is also available. Emfatic itself builds upon Gymnast, a framework for jumpstarting text editors for custom Domain Specific Languages. Documentation on how to extend Emfatic, as well as on using Gymnast, can be found in this technical report.

"MVEL is a powerful expression language for Java-based applications. It provides a plethora of features and is suited for everything from the smallest property binding and extraction, to full blown scripts. For more information, jump right to the Getting Started Guide."

Daffodil Replicator is a Java tool for data synchronization, data migration, and data backup between various database servers. Daffodil Replicator works over standard JDBC driver and supports replication across heterogeneous databases. At present, it supports following databases: Microsoft SQL Server, Oracle, Daffodil DB, DB2, Derby, MySql, and PostGreSql. Daffodil Replicator is available in both enterprise and open source versions referred as Daffodil Replicator(E) and Daffodil Replicator(OS) respectively. For more details on Daffodil Replicator (E) or Daffodil Replicator (OS), click on the links on the left.

" In general when people think about running a Java based application server with Apache as front-end they almost always think about using mod_jk to proxy to Glassfish, but you can also use mod_proxy quite effectively. If you are wanting to proxy from a HTTPS Apache to a HTTP Glassfish then this article describes how you can do that. "

Great website for begginers in java (and not only). It goes from the very beginning to intermediate topics and simple game development.

"JCR v2.0 Specification (HTML version) Content Repository for Java Technology API Specification (JSR-283) "

Apache Shiro (pronounced "shee-roh", the Japanese word for 'castle') is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management and can be used to secure any application - from the command line applications, mobile applications to the largest web and enterprise applications. Shiro provides the application security API to perform the following aspects (I like to call these the 4 cornerstones of application security): Authentication - proving user identity, often called user 'login'. Authorization - access control Cryptography - protecting or hiding data from prying eyes Session Management - per-user time-sensitive state Shiro also supports some auxiliary features, such as web application security, unit testing, and multithreading support, but these exist to reinforce the above four primary concerns.

"Eclipse Plug-in for tailing log files and eclipse consoles (e.g. SVN, Java Stack Trace, CDT), including syntax coloring with either a regular expression or a word match. It allows you to have multiple logs open concurrently. "

"This release brings some brand new features in GWT Application development Java API for Adobe Flex (AIR and Browser) More then 500 rich UI Compoments for your application ( http://www.gwt4air.appspot.com/) Client side file processing. Specially PDF and Excel Easy integration with your existing GWT application. Because the project is based on GWT, no need of a middleware to connect the Flex UI to the backend "

Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages. It is also fully interoperable with Java