Incremental Project Builders


The workspace supports the notion of an incremental project builder (or "builder" for short"). The job of a builder is to process a set of resource changes (supplied as a resource delta). For example, a Java builder would recompile changed Java files and produce new class files.

Builders are configured on a per-project basis and run automatically when resources within their project are changed. As such, builders should be fast and scale with respect to the amount of change rather than the number of resources in the project. This typically implies that builders are able to incrementally update their "built state".

The builders extension-point allows builder writers to register their builder implementation under a symbolic name that is then used from within the workspace to find and run builders. The symbolic name is the id of the builder extension. When defining a builder extension, users are encouraged to include a human-readable value for the "name" attribute which identifies their builder and potentially may be presented to users.

Configuration Markup:

<!ELEMENT extension (builder)>

<!ATTLIST extension




<!ELEMENT builder (dynamicReference? , run?)>

<!ATTLIST builder

hasNature              (true | false)

isConfigurable         (true | false)

callOnEmptyDelta       (true | false)

supportsConfigurations (true | false) >

<!ELEMENT run (parameter*)>



<!ELEMENT parameter EMPTY>

<!ATTLIST parameter



<!ELEMENT dynamicReference EMPTY>

<!ATTLIST dynamicReference


Following is an example of a builder configuration:

   <extension id="coolbuilder" name="Cool Builder" point=""> 
      <builder hasNature="false"> 
         <run class=""> 
            <parameter name="optimize" value="true"/> 
            <parameter name="comment" value="Produced by the Cool Builder"/> 

If this extension was defined in a plug-in with id "", the fully qualified name of this builder would be "".

API Information:
The value of the class attribute must represent a subclass of org.eclipse.core.resources.IncrementalProjectBuilder which can additionally optionally implement org.eclipse.core.resources.IIncrementalProjectBuilder2.

Supplied Implementation:
The platform itself does not have any predefined builders. Particular product installs may include builders as required.

Copyright (c) 2002, 2010 IBM Corporation and others.
This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which accompanies this distribution, and is available at SPDX-License-Identifier: EPL-2.0