The BIPPRToolbarServlet
class demonstrates how to enable Partial
Page Rendering (PPR) in the BIToolbarServlet
. This class inherits
toolbar functionality from BIToolbarServlet
. In response to user
interaction, this sample uses PPR to update the page so that the user does not
experience a loss of context.
The following section provides a walkthrough and explanations of the code fragments.
After the view and the toolbar are initialized, the following code enables PPR for the toolbar and sets IDs of the partial target nodes that should be rendered when PPR is enabled.
viewToolbar.setPartialRenderEnabled(true);
viewToolbar.setPartialTargets(new String[]{PRESENTATION_NAME});
The application can render the HTML by using a combination of raw HTML and
thin beans. However, the HTML body must be a UIX component, or the full page
will be rendered.
FormBean rootNode = new FormBean(FORM_NAME,
request.getRequestURI()+"?foo="+Integer.toString(m_pageCount));
rootNode.setMethod("POST");
The thin beans are added to a BodyBean
UIX component.
BodyBean body = new BodyBean();
body.addIndexedChild(rootNode);
The following call creates the PartialPageContext
from the ServletRequest
:
PartialPageContext partialContext =
PartialPageEventUtils.createPartialPageContext(request);
The thin beans in a FormBean
UIX component are rendered as follows:
The page is partially rendered if the PartialPageContext
is specified,
or fully rendered if the PartialPageContext
is null
.
ServletRenderingContext renderingContext = new ServletRenderingContext(this, request, response, out);
PartialPageUtils.renderPartialPage(renderingContext, body, partialContext);
While the code cleans up the BIHttpSession
that is related to
a client, the resources allocated by the servlet need to be cleaned up. This
includes beans that the servlet allocates for the session. The close
method (implemented by QueryClient
) should be called to release
resources that are related to the data source. The cleanUp
method
should be called on the ThinGraph
to release Graph-related resources.
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