Ajax Action
a4j:ajax
a4j:commandButton
a4j:commandLink
a4j:actionListener
a4j:jsFunction
a4j:poll
a4j:push
a4j:param
Ajax Queue
a4j:queue
a4j:attachQueue
Ajax Output/Containers
a4j:outputPanel
a4j:status
a4j:region
a4j:mediaOutput
a4j:log
Validation
Client Side Validation
rich:graphValidator
rich:message
rich:messages
rich:notify
Data Iteration
a4j:repeat
rich:dataTable
rich:extendedDataTable
rich:collapsibleSubTable
rich:dataScroller
rich:list
rich:dataGrid
Trees
rich:tree
Tree Adaptors
Output/Panels
rich:chart
rich:panel
rich:togglePanel
rich:tabPanel
rich:collapsiblePanel
rich:accordion
rich:popupPanel
rich:progressBar
rich:tooltip
Menus
rich:panelMenu
rich:toolbar
rich:contextMenu
rich:dropDownMenu
Inputs
rich:autocomplete
rich:calendar
rich:editor
rich:inputNumberSlider
rich:inputNumberSpinner
rich:inplaceInput
rich:fileUpload
Selects
rich:inplaceSelect
rich:select
rich:orderingList
rich:pickList
Drag and Drop
Drag and Drop
Miscellaneous
Standard elements skinning
rich:placeholder
RichFaces functions
rich:focus
rich:componentControl
rich:hashParam
rich:hotKey
rich:jQuery

The a4j:poll component defines a way to periodically poll a server in order to trigger state changes, or update parts of your page. You can use the same options, and settings as the a4j:ajax or a4j:commandButton. So you can set execute, and render attributes, as well as any normal JSF action attributes. RichFaces uses a standard form based request, so the form around the a4j:poll component is required.

The example below updates the date and time on the page based on the data on the server. To turn off polling, press "Stop Polling" button.

Polling Active
Server Date: Tue Sep 26 16:05:59 EDT 2017
NOTE: polling is automatically disabled in this demo after one minute.