StateExecListener


1   package org.sapia.soto.state;
2   
3   
4   /**
5    * Specifies the behavior of listeners that are notified upon execution of flows.
6    *
7    * @see StateMachine#addStateExecListener(StateExecListener)
8    *
9    * @author Yanick Duchesne
10   * <dl>
11   * <dt><b>Copyright:</b><dd>Copyright &#169; 2002-2003 <a HREF="http://www.sapia-oss.org">Sapia Open Source Software</a>. All Rights Reserved.</dd></dt>
12   * <dt><b>License:</b><dd>Read the license.txt file of the jar or visit the
13   *        <a HREF="http://www.sapia-oss.org/license.html">license page</a> at the Sapia OSS web site</dd></dt>
14   * </dl>
15   */
16  public interface StateExecListener {
17    /**
18     * Called before a flow is executed.
19     *
20     * @param st the <code>State</code> corresponding to the execution.
21     * @param flowId the ID of the executed flow.
22     */
23    public void onPreExec(Result st, String   flowId);
24  
25    /**
26     * Called after a flow is executed.
27     *
28     * @param st the <code>State</code> corresponding to the execution.
29     * @param flowId the ID of the executed flow.
30     */
31    public void onPostExec(Result st, String   flowId);
32  
33    /**
34     * Called after a flow's execution, if an error has occurred.
35     *
36     * @param st the <code>State</code> corresponding to the execution.
37     * @param flowId the ID of the executed flow.
38     * @param err the <code>Err</code> object that encapsulates error data.
39     *
40     * @see Result#isError()
41     */
42    public void onError(Result st, String   flowId, Err err);
43  }
44

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