Examples of org.apache.tapestry.services.ResponseBuilder

org.apache.tapestry.services.ResponseBuilder
Represents the service responsible for managing all content output that is sent to the client. In the case of normal http responses this management would inlude handing out {@link IMarkupWriter} instances to render components with, as well as managing any javascript written to the output using Script templates.
This is a major internal change in terms of the way tapestry renders pages/components. Traditionally a response has been rendered via: IPage.render(writer, cycle); The logic has now changed somewhat, while the IPage.render(writer, cycle) does still happen, this service is the primary invoker of all renders, even nested component bodies. That means that in the majority of cases the ResponseBuilder service is used to invoke IComponent.render() throught the entire render cycle, creating a great deal of flexibility in terms of what can be done to control the output of a given response.

This service was primarily created to help bolster support for more dynamic content responses, such as XHR/JSON/etc - where controlling individual component output (and javascript) becomes very important when managaing client side browser state.
@author jkuhnert @since 4.1


        String namespace = _response.getNamespace();


        IMarkupWriter nested = writer.getNestedWriter();
        
        ResponseBuilder builder = new DefaultResponseBuilder(nested);
        
        PageRenderSupportImpl support = new PageRenderSupportImpl(
                _assetFactory, namespace, null, builder);


        TapestryUtils.storePageRenderSupport(cycle, support);
        
        builder.renderResponse(cycle);
        
        String id = "Tapestry Portlet " + _applicationId + " " + namespace;


        writer.comment("BEGIN " + id);
        writer.comment("Page: " + page.getPageName());

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    public void test_Null_Render() 
    {
        IRender render = (IRender)newMock(IRender.class);
        IRequestCycle cycle = (IRequestCycle)newMock(IRequestCycle.class);
        
        ResponseBuilder builder = new DefaultResponseBuilder(null);
        
        render.render(null, cycle);
        
        replay();
        
        builder.render(null, render, cycle);
        
        verify();
        
        assertSame(builder.getWriter(), NullWriter.getSharedInstance());
    }

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    {
        IRender render = (IRender)newMock(IRender.class);
        IRequestCycle cycle = (IRequestCycle)newMock(IRequestCycle.class);
        IMarkupWriter writer = (IMarkupWriter)newMock(IMarkupWriter.class);
        
        ResponseBuilder builder = new DefaultResponseBuilder(writer);
        
        render.render(writer, cycle);
        
        replay();
        
        builder.render(null, render, cycle);
        
        verify();
        
        assertSame(builder.getWriter(), writer);
    }

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    }
    
    public void test_Get_Writer_Type()
    {
        IMarkupWriter writer = (IMarkupWriter)newMock(IMarkupWriter.class);
        ResponseBuilder builder = new DefaultResponseBuilder(writer);
        
        assertSame(builder.getWriter("test", "type"), writer);
    }

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    }
    
    public void test_Allowed_Scripts()
    {
        IComponent component = (IComponent)newMock(IComponent.class);
        ResponseBuilder builder = new DefaultResponseBuilder(null);
        
        assertTrue(builder.isBodyScriptAllowed(component));
        assertTrue(builder.isExternalScriptAllowed(component));
        assertTrue(builder.isInitializationScriptAllowed(component));
    }

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        IRequestCycle cycle = (IRequestCycle)newMock(IRequestCycle.class);
        
        replay();
        
        IMarkupWriter mw = new MarkupWriterImpl("text/html", writer, filter);
        ResponseBuilder builder = new DefaultResponseBuilder(mw);
        
        String bscript = "var e=4;";
        String imageInit = "image initializations";
        String preload = "preloadedvarname";
        
        verify();
        replay();
        
        builder.beginBodyScript(mw, cycle);
        
        assertOutput("<script type=\"text/javascript\"><!--"+LINE_SEPARATOR);
        
        builder.writeImageInitializations(mw, imageInit, preload, cycle);
        
        assertOutput(LINE_SEPARATOR
                + "dojo.addOnLoad(function(e) {\n"
                + preload + " = [];\n"
                + "if (document.images)\n"
                + "{\n" + imageInit + "}\n"
                + "});");
        
        builder.writeBodyScript(mw, bscript, cycle);
        
        assertOutput(bscript);
        
        builder.endBodyScript(mw, cycle);
        
        assertOutput(LINE_SEPARATOR + "// --></script>");
        
        verify();
    }

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        IRequestCycle cycle = (IRequestCycle)newMock(IRequestCycle.class);
        
        replay();
        
        IMarkupWriter mw = new MarkupWriterImpl("text/html", writer, filter);
        ResponseBuilder builder = new DefaultResponseBuilder(mw);
        
        String script1 = "http://noname/js/package.js";
        String script2 = "http://noname/js/package.js";
        
        verify();
        replay();
        
        builder.writeExternalScript(mw, script1, cycle);
        
        assertOutput("<script type=\"text/javascript\" src=\""
                + script1 + "\"></script>" + LINE_SEPARATOR);
        
        builder.writeExternalScript(mw, script2, cycle);
        
        assertOutput("<script type=\"text/javascript\" src=\""
                + script2 + "\"></script>" + LINE_SEPARATOR);
        
        verify();

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        PrintWriter writer = newPrintWriter();
        
        replay();
        
        IMarkupWriter mw = new MarkupWriterImpl("text/html", writer, filter);
        ResponseBuilder builder = new DefaultResponseBuilder(mw);
        
        String script = "doThisInInit();";
        
        verify();
        replay();
        
        builder.writeInitializationScript(mw, script);
        
        assertOutput("<script type=\"text/javascript\"><!--\n"
                + "dojo.addOnLoad(function(e) {\n"
                + script 
                + "});"

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    {
        IRender render = newMock(IRender.class);
        IRequestCycle cycle = newMock(IRequestCycle.class);
        IMarkupWriter writer = newWriter();


        ResponseBuilder builder = new DojoAjaxResponseBuilder(cycle, writer, null);


        render.render(NullWriter.getSharedInstance(), cycle);


        replay();


        builder.render(writer, render, cycle);


        verify();


        assertSame(builder.getWriter(), writer);
    }

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    {
        IRender render = newMock(IRender.class);
        IRequestCycle cycle = newMock(IRequestCycle.class);
        IMarkupWriter writer = newMock(IMarkupWriter.class);


        ResponseBuilder builder = new DojoAjaxResponseBuilder(cycle, writer, null);


        render.render(NullWriter.getSharedInstance(), cycle);


        replay();


        builder.render(null, render, cycle);


        verify();


        assertSame(builder.getWriter(), writer);
    }

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