Feeds

Groovy way to MySQL

Get your Groove on

7 Elements of Radically Simple OS Migration

A very traditional niche of scripting languages, (such as Perl, Python or Ruby), has been in the ad hoc manipulation of databases – from grabbing data, transforming it, performing bulk updates, right on through to full-on data migration projects that move data from one platform or RDBMS to another. Scripting languages are perfect for these types of task because they are quick to write and test, can be used interactively while the problem space is being explored, and because extraneous features – such as graphical user interface, detailed user documentation and so on – are not required.

For hardcore Java hackers, much of this kind of ad hoc activity has either entailed writing utilities libraries or, more likely, dropping down into another language – from Unix shell scripts to the aforementioned Perl, Python, Ruby et al. Now, however, Groovy exists to provide all of the benefits of a dynamically-typed scripting language that is designed to be easily accessible to Java developers and which sits on top of the Java Virtual Machine (JVM) and, as a big bonus, can make use of existing Java APIs and packages.

In the case of database access, Groovy can be used both with the standard Java JDBC mechanism (which makes use of SQL) or with its own high-level SQL-less DataSet libraries. In this two-part hands-on tutorial we'll look at how you can use Groovy to quickly and easily interface with a MySQL database sitting on a remote server somewhere.

First things first, though, and that's to install Groovy and to check that it all runs smoothly. Groovy can be downloaded here - there are install packages for various platforms, including Windows, Linux, and a platform-independent zip.

Aside from dropping the files into the right place the only other things to do are set the GROOVY_HOME environment variable (and JAVA_HOME if it doesn't already exist), and to make sure that the \groovy\bin directory is on your path.

A quick way to test is simply to open a command shell or terminal and type:

groovy -v

This should come back with the versions of Groovy and Java that you have installed.

The only other thing you need to have in place is a JDBC driver for MySQL. The jar file needs to be on the classpath; simply copying the file to the \groovy\lib is enough to banish any problems.

For the purposes of this article we'll be looking at a simple database (called pers) which contains a single table, called users, which is represented by the following grid:

user_name email user_id
'tom' 'tom@here.com' 1
'dick' 'dick@there.co.uk' 2
'harry' 'harry@harry.com' 3
'george' 'hello@hello.org' 4

Endpoint data privacy in the cloud is easier than you think

More from The Register

next story
PEAK LANDFILL: Why tablet gloom is good news for Windows users
Sinofsky's hybrid strategy looks dafter than ever
Leaked Windows Phone 8.1 Update specs tease details of Nokia's next mobes
New screen sizes, dual SIMs, voice over LTE, and more
POW! Apple smites Macbook Air EFI firmware update borkage
Fruity firm provides digital balm for furious fanbois
Call off the firing squad: HP grants stay of execution to OpenVMS
Startup to take over support for today's Itaniums and beyond
Fiendishly complex password app extension ships for iOS 8
Just slip it in, won't hurt a bit, 1Password makers urge devs
Mozilla keeps its Beard, hopes anti-gay marriage troubles are now over
Plenty on new CEO's todo list – starting with Firefox's slipping grasp
Apple: We'll unleash OS X Yosemite beta on the MASSES on 24 July
Starting today, regular fanbois will be guinea pigs, it tells Reg
Another day, another Firefox: Version 31 is upon us ALREADY
Web devs, Mozilla really wants you to like this one
prev story

Whitepapers

7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
A new approach to endpoint data protection
What is the best way to ensure comprehensive visibility, management, and control of information on both company-owned and employee-owned devices?