How to create new Action in the Liferay 6.06

[me liferay, modificado hace 11 años.]

I want to create one extra action for the documents of document library portlet.
After 6.0 SP2 it is possible to create it by hook but I do not know how to create it in 6.0.6 version.
What I have tried is as follow

Added entry for action directly in the struct-config.xml file(I know it is not best practice)

<action path="/document_library/subscribe_file_entry" type="com.sample.hook.dl.action.SubscribFileEntryAction">
			<forward name="portlet.document_library.subscribe_file_entry" path="portlet.document_library.subscribe_file_entry" />
			<forward name="portlet.document_library.error" path="portlet.document_library.error" />
		</action>

In JSP

	<c:if test="<%= showActions &amp;&amp; DLFileEntryPermission.contains(permissionChecker, fileEntry, ActionKeys.UPDATE) %>">
				<portlet:renderurl var="subscribeURL">
					<portlet:param name="struts_action" value="/document_library/subscribe_file_entry" />
					<portlet:param name="redirect" value="<%= currentURL %>" />
					<portlet:param name="folderId" value="<%= String.valueOf(fileEntry.getFolderId()) %>" />
					<portlet:param name="name" value="<%= HtmlUtil.unescape(fileEntry.getName()) %>" />
				</portlet:renderurl>

				<liferay-ui:icon image="edit" url="<%= subscribeURL %>" />
			</c:if>

Created this class SubscribFileEntryAction which entends com.liferay.portal.struts.PortletAction class
but when I deploy the hook I am able to see the action but when I click on that action it throws following error
java.lang.ClassNotFoundException: com.sample.hook.dl.action.SubscribFileEntryAction
(but It is there in the my deployed hook I can see the class file for that class)

[Juan Francisco Ramos, modificado hace 11 años.]

Hello!

To create a new functionality for an original portlet, you must use hooks or ext-portlets. Please look the documentation of hooks, for example:

Hooks

I hope I have helped you ;)