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Posted to users@tapestry.apache.org by Martin Grotzke <ma...@freiheit.com> on 2007/05/24 18:45:21 UTC

T5 page lifecycle

Hello,

I have a simple search page with an input field (query) and a submit
button.

The submit implementation returns a page link to receive a bookmarkable
page (with pagename and query param), and the onActivate(String) then
performs a search for the query.

Although, the onActivate(String) is called twice, and another onActivate
method that I do have, is also invoked afterwards (this intended for
other links on the page, and is also performing a search).
The other onActivate method is called with "main_functions.js" as an
argument, which is simply a <script type=... element in the header of
the page template...

Am I using T5 wrong, or is this a problem of T5?

See the following log, the page class and the template for more info.

Thanx in advance,
cheers,
Martin


==== log output for a submit ==========================================

[INFO ] 2007-05-24 18:30:04,727 btpool0-2 org.comp.app.pages.Search.submit:
Received submit with query ipod, returning pageLink now.

[INFO ] 2007-05-24 18:30:04,895 btpool0-2 org.comp.app.pages.Search.onActivate:
[1] Got invoked with query ipod

[INFO ] 2007-05-24 18:30:04,896 btpool0-2 org.comp.app.pages.Search.performSearch:
Starting search...

[INFO ] 2007-05-24 18:30:05,519 btpool0-2 org.comp.app.pages.Search.onActivate:
[1] Got invoked with query ipod

[INFO ] 2007-05-24 18:30:05,520 btpool0-2 org.comp.app.pages.Search.performSearch:
Starting search...

[INFO ] 2007-05-24 18:30:05,616 btpool0-2 org.comp.app.pages.Search.onActivate:
[2] Got invoked with query js and facetConstraints main_functions.js

[INFO ] 2007-05-24 18:30:05,617 btpool0-2 org.comp.app.pages.Search.performSearch:
Starting search...


==== page class (with relevant methods) =========================================

public class Search {
    
    private static final Log LOG = LogFactory.getLog( Search.class );

    @Inject
    private ComponentResources _componentResources;
    
    /* [snip, several properties] */
    
    @Persist( "flash" )
    private String _query;
    
    public void onActivate(String query) {
        LOG.info( "[1] Got invoked with query " + _query );
        if ( _query != null ) {
            _query = query;
            performSearch();
        }
    }
    
    public void onActivate(String query, List<String> facetConstraints) {
        LOG.info( "[2] Got invoked with query " + _query + " and facetConstraints " + CollectionUtil.toCSV( facetConstraints ) );
        _query = query;
        if ( facetConstraints != null ) {
            for( String facetConstraint : facetConstraints ) {
                /* [snip] */
            }
        }
        performSearch();
    }

    @OnEvent(value="submit")
    public Link submit() {
        LOG.info( "Received submit with query " + _query + ", returning pageLink now." );
        return _componentResources.createPageLink( getClass().getSimpleName(), new Object[]{ _query } );
    }

    public void performSearch() {
        LOG.info( "Starting search..." );
        final SearchResult result = _searchService.search( getQuery(), _selectedFacetConstraints,
                null, 10, 5 );
        
        _numFound = result.getNumFound();
        
        _products = result.getProducts();
        
        _facets = result.getFacets();
    }
    
    /* [snip] */
    
}


==== page template (short version) =====================================

<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd">
<head>
    <script type="text/javascript" src="js/main_functions.js"></script>
</head>
<body>
    <t:form t:id="search_form">
	<t:textfield t:id="q" t:value="query" />
	<input type="submit" id="submit" value="suchen"/>
    </t:form>
</body>



-- 
Martin Grotzke
Dipl.-Inf.

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