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21 package org.apache.struts2.portlet.dispatcher;
22
23 import com.opensymphony.xwork2.Action;
24
25 import java.io.Serializable;
26 import java.util.Map;
27
28 import org.apache.struts2.interceptor.SessionAware;
29 import org.apache.struts2.portlet.PortletActionConstants;
30
31 /***
32 * When a portlet is targetted for an <code>event</code>, the portlet will receive two
33 * portlet requests, one for the <code>event</code> phase, and then followed by a <code>render</code>
34 * operation. When in the <code>event</code> phase, the action that is executed can't render
35 * any output. This means that if an action in the XWork configuration is executed in the event
36 * phase, and the action is set up with a result that should render something, the result can't
37 * immediately be executed. The portlet needs to "wait" to the render phase to do the
38 * rendering.
39 * <p/>
40 * When the {@link org.apache.struts2.portlet.result.PortletResult} detects such a
41 * scenario, instead of executing the actual view, it prepares a couple of render parameters
42 * specifying this action and the location of the view, which then will be executed in the
43 * following render request.
44 */
45 public class DirectRenderFromEventAction implements SessionAware, PortletActionConstants, Action, Serializable {
46
47 private static final long serialVersionUID = -1814807772308405785L;
48
49 private String location = null;
50
51 /***
52 * Get the location of the view.
53 *
54 * @return Returns the location.
55 */
56 public String getLocation() {
57 return location;
58 }
59
60 /***
61 * Always return success.
62 *
63 * @return SUCCESS
64 */
65 public String execute() throws Exception {
66 return SUCCESS;
67 }
68
69 public void setSession(Map session) {
70 location = (String)session.get(RENDER_DIRECT_LOCATION);
71 }
72 }