.. _-extract-java-:

extract
=======

Description
-----------

The ``extract`` directive is used as a building block for :ref:`Custom Directives-java` to extract data from the
``RequestContext`` and provide it to the inner route.

See :ref:`ProvideDirectives-java` for an overview of similar directives.

Example
-------

.. includecode:: ../../../../code/docs/http/javadsl/server/directives/BasicDirectivesExamplesTest.java#extract