如何在Java中为声纳设置自定义复杂度限制？

Question

Is there a way to set complexity limits for sonar? I prefer very simple codes (at most one if or loop), but I cannot find a setting like sonar.cpd.java.minimumtokens or sonar.cpd.java.minimumLines exist for code duplications (and does not seem to work, but that will be another question).

I would like to reduce the cyclomatic complexity limit for methods, and also the maximum number of methods in one class. For the latter, a line limit would be okay. How can I set those complexity limits?

Answer 1

There is a few Java rules targeting cyclomatic complexity provided with SonarQube. The only way to configure them is to use a dedicated Quality Profile. By default, the SonarWay quality profile uses fixed thresholds. However, these rules are parameterizable, and you can configure them as soon as you create a quality profile other than the default SonarQube's SonarWay profile. You will then have to configure your project to rely on this new Quality Profile, rather than SonarWay .

For reference, have a look at the following rules:

• squid:MethodCyclomaticComplexity : Methods should not be too complex (default threshold: 10)
• squid:ClassCyclomaticComplexity : Classes should not be too complex (default max: 200 - deprecated rule)

I would also recommend to have a look at another complexity-related rule:

• squid:S3776 : Cognitive Complexity of methods should not be too high

This rule is relying on the concept of Cognitive Complexity , designed in order to remedy Cyclomatic Complexity's shortcomings and produce a measurement that more accurately reflects the relative difficulty of understanding, and therefore of maintaining methods, classes, and applications.