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Groovy 2.1 completes JDK7 ‘invoke dynamic’ support

Chris Mayer
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A new update for the dynamic JVM language has arrived, ushering in concurrency framework GPars as well as important features.

After last June’s big release, the team behind dynamic JVM
language Groovy have provided a welcome update that brings full
‘invoke dynamic’ support. The announcement was the centrepiece of
Groovy’s first Spanish conference in Madrid,
Greach.

The JDK 7 instruction, dubbed ‘indy’,  introduced
simplified implementations for dynamic language compilers and
runtimes, allowing languages such as Groovy, Scala and Clojure to
get the first class support they deserve on the platform. The
Groovy development team made great strides towards offering this in
the second iteration, but the newest update takes things
further
by allowing
constructor calls to use the instruction.

The latest version of
popular concurrency framework

GPars, which makes concurrent programming in
Java and Groovy easier,
has found its way
into the distribution. Complete with Scala-like actor constructs
and data parallelism, its inclusion with the full language
distribution certifies its rise from Groovy-inspired offshoot
to
a key part of its future.

Project
lead Guillaume Laforge notes
other additions like
a new “special annotation to assist with documentation and type
safety of DSLs”, which in turn adds static type checker extensions.
There’s further customisable compilation options and a new
meta-annotation facility to combine annotations into one “alias”
annotation.

Having chalked up nearly two million downloads last year,
Groovy and its array of sub-projects look set to enjoy further
success. Another version is planned follow soon after Java 8’s
release to take advantage of the new language
features.

For more details on Groovy 2.1’s new features, check out
the

release notes
. Also worth reading is
the

series of posts
from Grails/Groovy developer
Andre Steingress showing what you can do with Groovy 2.1

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