enhance your maven plugins with groovy

© Computas AS 08.04.2023

Enhance your Maven plugins with Groovy

(experiences with Groovyfication)

Harald Søvikhso @ computas.com

Speakers

Harald Søvik

Java Tech Lead, M.Sc.

hso@computas.com

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bpm work support systems

knowledge management

consultancy services

custom software solutions

180 employees w/ M.Sc. or Ph.D.

100% owned by employees

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Groovy

OO

dynamic

run on jvm

Java-like

Java-interoperable

scripting / web / jms ++

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Pro forma

I’m not a Groovy expert !

I’m focusing on Java <> Groovy

not neccessarily the very best way of solving it alltogether !

Using pure Java libraries would make a different story

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Goal

Investigate home-brew enterprise Maven plugins

Would Groovyfication™ affect ..

Simplicity?

Maintainability?

Testability?

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Recipe for your Maven project

add build step with gmaven-plugin

add dependency to gmaven-mojo

src/java vs src/groovy

.java vs .groovy

compile and enjoy !

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Example 2: Enterprise plugin logic

PurposeExecute external program

Determine exit value

DifferencesException handling

Controlling flow of execution

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Example 4: Enterprise plugin logic

PurposeCheck if URL has content (~ ping)

DifferencesException handling

Controlling flow of execution (“debug comments”)

Readability

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Example 5: DTO

PurposeInternal ”entity” class

DifferencesConstructor

Constructor call, readability

Accessor methods

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Example 6: Testability

PurposeTest a method converting a String with windows style path to posix-style path

Differences”Groovy set of mind”

Highlight low cohesion

Refactoring opportunities

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Experiences

>>

Task-oriented, high-level operations

Testability readyness

<<

Complex, procedural code

Detailed logging, exception handling

Low cohesion

Questions or comments ?

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