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Table of Contents

Versioning Strategy

The goal of this versionnig versionig strategy is both to :

  • Release often release early in order to get quick feedback from Sonar the SonarQube community
  • Release some stable versions of the Sonar SonarQube platforms for companies whose main priority is to set-up some very stable environments. Even if the price for such stable environnements is to not benefit of latest and sexy Sonar SonarQube features
  • Support the the API deprecation strategy (see next section)


  • Each two months a new version of Sonar SonarQube is released. This version should increment the minor digit of the previous version (ex: 4.2 -> 4.3)
  • After three releases, a bug fix release is done and the major digit of the previous version is incremented (ex: 4.3 -> 5.0)


Code Block
4.2 -> 4.3 -> 5.1 -> 5.2 -> 5.3 -> 6.1        <- New release each 2 months 
        |                    |
       5.0                  6.0               <- Major releases containing only bug fixes each 6 months 


API Deprecation Strategy

The goal of this deprecation strategy is to make sure that any deprecated API will be dropped without any side-effects at a given planned date. The expected consequence of such strategy is to ease the evolution of the Sonar API by making such refactoring painless.


  • Any API must be deprecated before being dropped
  • A deprecated API must be fully supported until its drop (For instance the implementation of a deprecated method can't be replaced by a "throw new UnsupportedOperationException()")
  • If an API is deprecated in version X.Y, this API will be dropped in version (X+1).3. Example: an API deprecated in 4.1 is supported in 4.2, 4.3, 5.0, 5.1, 5.2 and is dropped in version 5.3.
  • According to the versionning strategyversioning strategy, that means that an API can remain deprecated before being dropped during 6 to 12 months.
  • Any release of a Sonar SonarQube plugin must at least depends on the last major X.0 version of the Sonar the SonarQube API
  • For each Sonar SonarQube plugin there must at least one release on each major version of Sonar. SonarQube, which means at least one release each 6 months.
  • No usage of deprecated API is accepted when releasing a plugin. It raises a critical issue in Sonar SonarQube analysis. This issue can't be postponed.
  • No depreacted API introduced 2 major versions ago is accepted when releasing Sonar, It SonarQube. It raises a critical issue in Sonar SonarQube analysis. This issue can't be postponed.
  • An API is marked as deprecated with both:
    • the annotation @Deprecated
    • the javadoc tag @deprecated whose message must start with "in x.y", for example:

      Code Block
       * @deprecated in 4.2. Replaced by {@link #newMethod()}.
      public void foo() {


Code Block
  A deprecated                  A removed
       |                           |
4.1-> 4.2 -> 4.3 -> 5.1 -> 5.2 -> 5.3 -> 6.1       
              |                    |
             5.0                  6.0          

Deprecated Libraries

Removal of libraries do not follow the same strategy than standard APIs. They usually require much more time than 2 series of versions to be fully dropped.


Moreover note that Java 5 is no longer supported since Sonar 3SonarQube3.6.