PushTarget Component

The pushTarget component must be nested inside a container component. Multiple pushTargets can be nested inside a single container. Each pushTarget represents a single clientside element and can subscribe to multiple topics.

When a message is broadcast, the pushTarget will fire an event which will usually return a block. The resultant markup will update the clientside element. Updates can append or prepend to the current contents of the client element or can replace the content entirely.

Messages are broadcast to pushTargets via the AtmosphereBroadcaster

Parameters

Name	Type	Default	Required	Comments
topics	List<String>		true	One or more topics to subscribe to
update	UpdateStrategy	replace	true	append, prepend or replace
event	String		true	Serverside event to fire each time a message is broadcast on one of the topics
element	String	div	false	Clientside HTML element
clientId	String	prop:componentResources.id	false	Clientside element id

Example

<div
   xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd"
   xmlns:p="tapestry:parameter"
   xmlns:atmos="tapestry-library:atmos"
>
   <atmos:container transport="websocket" fallbackTransport="long-polling">
      <atmos:pushTarget topics="topic1" event="topic1Message" update="replace" element="span">
         Initial content goes here
      </atmos:pushTarget>
      <atmos:pushTarget topics="prop:['topic2','topic3']" event="topic23Message" update="append" />
   </atmos:container>
</div>