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Mastering Eclipse Plug-in Development

You're reading from   Mastering Eclipse Plug-in Development Build modular applications on Eclipse by defining custom extension points and using OSGi services

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Product type Paperback
Published in Aug 2014
Publisher
ISBN-13 9781783287796
Length 362 pages
Edition 1st Edition
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Authors (2):
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Bandlem Limited Bandlem Limited
Author Profile Icon Bandlem Limited
Bandlem Limited
Alex Blewitt Alex Blewitt
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Alex Blewitt
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Toc

Semantic versioning


A key aspect of OSGi bundles and packages is that they are versioned using semantic versioning. This encodes compatibility into the version number so that clients can select an appropriately versioned component to build against or bind to.

Semantic versioning breaks down a number such as 1.2.3.RELEASE into the following four parts:

  • Major version: This is a number that indicates the major release (1)

  • Minor version: This is a number that indicates the minor release (2)

  • Micro (or patch) version: This is a number that indicates the micro (patch) release (3)

  • Qualifier: This is a textual string that indicates the patch (RELEASE)

This version numbering scheme is used by every Java JAR in Maven Central and can be used to determine whether or not upgrading to a later version will be compatible. Numbers default to 0 if they are not specified, and the qualifier defaults to an empty string. In OSGi, numbers are sorted numerically and the qualifier is sorted alphabetically.

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