Page History

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For page navigation events (originating in components such as EventLink, ActionLink and Form), the value returned from an event handler method determines how Tapestry will render a response.If the event handler method returns

• Null: For no value, or

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• null,

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• the current page (the page containing the component) will render the response.

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• Page: For the name of a page, or a page class or page instance

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• ,

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• a render request URL will be constructed and sent to the client as a redirect to that page.

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• URL: For a java.net.URL

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• , a redirect will be sent to the client. (In Tapestry 5.3.x and earlier, this only works for non-Ajax requests.)
• Zone body: In the case of an Ajax request to update a zone, the component event handler will return the new zone body, typically via an injected component or block.
• HttpError: For an HttpError, an error response is sent to the client.
• Link: For a Link, a redirect is sent to the client.
• Stream: For a StreamResponse, a stream of data is sent to the client

See Page Navigation for other return valuesmore details.

Multiple Method Matches

In some cases, there may be multiple event handler methods matching a single event. In that case, Tapestry invokes them in the following order:

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