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Apache Gump
Apache Gump Logo
Developer(s)Apache Software Foundation
Written inPython
Operating systemCross-platform
TypeContinuous integration
LicenseApache License 2.0

Apache Gump is an open source continuous integration system, which aims to build and test all the open source Java projects, every night. Its aim is to make sure that all the projects are compatible, at both the API level and in terms of functionality matching specifications. It is hosted at, and runs every night on the official Sun JVM.


Gump was created by Sam Ruby, based on his experience in the Perl community. It was originally written in Java

The current live version, Gump 3, has been completely rewritten in Python.


To join Gump, a project must provide two XML files. One describes how to access the live CVS or Subversion repository; the other what to build from the repository, and the artifacts produced. Each project can be dependent upon other projects; these dependencies are declared so that Gump knows the correct order to build things.

Gump can build shell script, Ant and Maven 1 projects, setting up the classpath appropriately. Ant and Maven 1 have special hooks built in them to give Gump complete control of the classpaths used to build and test the applications. This allows Gump to build the projects against the latest versions, even if the project's own build files have hard coded dependencies against static libraries in their own CVS or subversion repository.

If a build on Gump is successful, a report is placed on the site, and all projects that declare themselves dependencies are eligible to be built. If a project fails to build, error reports are published, an error email is sent, and all dependent projects are blocked from building.