GMetrics

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Running and Configuring GMetrics

You can run GMetrics using the supplied Ant Task.

Define the metrics to calculate by Creating a MetricSet.

There is also a Grails GMetrics Plugin and a Griffon GMetrics Plugin. And the Sonar Groovy Plugin uses GMetrics for its calculation of Cyclomatic Complexity for Groovy source code.

Metrics

Total and average values for the following metrics are provided:

• Cyclomatic Complexity.
• ABC - Size/Complexity. Also see the C2 Wiki page.
• Cobertura line coverage
• Cobertura branch coverage
• CRAP - (Change Risk Anti-Patterns) score
• Afferent Coupling
• Efferent Coupling
• Method Count - Count of methods and closure fields within each class
• Method Line Count - Lines per method
• Class Line Count - Lines per class
• Class Count - Number of classes per package
• Field Count - Number of field per class

Reports

GMetrics provides the following reports:

• BasicHtmlReportWriter (Sample)
• SingleSeriesHtmlReportWriter (Sample)
• XmlReportWriter (Sample)

Or Create a GMetrics Report with XSLT.

Requirements

GMetrics requires:

• Groovy version 2.4 or later
• Java 1.6 or later
• The SLF4J API jar and an SLF4J binding jar. See The SLF4J Manual.

Getting GMetrics from the Maven2 Central Repository

For projects built using Maven, GMetrics is now available from the Maven Central Repository.

• groupId = org.gmetrics
• artifactId = GMetrics