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Posted to docs@cocoon.apache.org by da...@cocoon.zones.apache.org on 2005/09/22 15:56:05 UTC

[DAISY] Created: Action FAQs

A new document has been created.

http://cocoon.zones.apache.org/daisy/legacydocs/715.html

Document ID: 715
Branch: main
Language: default
Name: Action FAQs
Document Type: Document
Created: 9/22/05 1:55:51 PM
Creator (owner): Helma van der Linden
State: publish

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<h2>What is an Action?</h2>

<p>An Action is a sitemap component that manipulates runtime parameters based on
request and application state. An Action's result is available in the sitemap as
map of name/value pairs. Detailed information on actions may be found in
<a href="daisy:579">Creating and Using Actions</a>.</p>

<h2>Why does Cocoon return an error when I add an action to a pipeline?</h2>

<p>The pipeline was working fine before the action was added. After the change,
Cocoon seems unable to find the file specified in the variable that is returned
by the matcher.</p>

<pre>&lt;map:match pattern="*"&gt;
  &lt;map:act type="validate-session"&gt;
    &lt;map:generate type="serverpages" src="{../1}.xsp"/&gt;
  &lt;/map:act&gt;
  &lt;map:serialize/&gt;
&lt;/map:match&gt;
</pre>

<p>Please note in the above example the "<em><tt>../1</tt></em>".</p>

<p>Map objects returned from matchers and actions are organised
<em>hierarchically</em>. Therefore, old map objects are not replaced by new
ones, such as the map objects returned by the validate-session action above.
Because older map objects are still accessible through a path expression, new
ones are accessed differently. Here "<tt>../1</tt>" references key ( or
"variable") "1" in the next to last Map.</p>

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