Examples of grails.web.mvc.FlashScope

grails.web.mvc.FlashScope
Represents flash scope and allows a flash scope map to be set to the next state. Flash scope essentially allows variables to be maintained for the next state and the next state only, what this means is if objects are stored inside FlashScope on the first call to "next()" they will be still there, but on the subsequent call they will be cleared unless they have been set again since the last call to "next()" @author Graeme Rocher

            return null;
        }


        HttpServletRequest servletRequest = (HttpServletRequest) request;
        HttpSession session = servletRequest.getSession(false);
        FlashScope fs;
        if (session != null) {
            fs = (FlashScope)session.getAttribute(FLASH_SCOPE);
        }
        else {
            fs = (FlashScope)request.getAttribute(FLASH_SCOPE);

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    private static final String ERRORS_PROPERTY = "errors";


    public void testPutNull() {
        GrailsWebMockUtil.bindMockWebRequest();


        FlashScope fs = new GrailsFlashScope();
        fs.put("test",null);
    }

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    public void testNextState() {


        GrailsWebMockUtil.bindMockWebRequest();


        FlashScope fs = new GrailsFlashScope();
        fs.put("test","value");
        fs.put("fred","flintstone");
        fs.getNow().put("barney", "rubble");


        assertFalse(fs.isEmpty());
        assertEquals("flintstone",fs.get("fred"));
        assertEquals("rubble",fs.get("barney"));
        assertEquals(3, fs.size());
        assertTrue(fs.containsKey("test"));
        assertTrue(fs.containsKey("barney"));
        assertTrue(fs.containsValue("value"));
        assertFalse(fs.containsKey("wilma"));


        // the state immediately following this one the map should still contain the previous entries
        fs.next();


        assertFalse(fs.isEmpty());
        assertEquals("flintstone",fs.get("fred"));
        assertEquals(2, fs.size());
        assertTrue(fs.containsKey("test"));
        assertTrue(fs.containsValue("value"));
        assertFalse(fs.containsKey("wilma"));


        // the next state it should be empty
        fs.next();


        assertTrue(fs.isEmpty());
        assertEquals(0,fs.size());
    }

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        map.put("barney","rabble");
        MetaClass mc = GroovySystem.getMetaClassRegistry().getMetaClass(value.getClass());
        mc.setProperty(value, ERRORS_PROPERTY, new Object());


        //put the map to scope
        FlashScope fs = new GrailsFlashScope();
        fs.put("test", "value");
        fs.put("flinstones", map);


        assertFalse(fs.isEmpty());
        assertEquals(2, fs.size());
        assertEquals(map,fs.get("flinstones"));
        assertEquals("value", fs.get("test"));


        // the state immediately following this one the map should still contain the previous entries
        fs.next();


        assertFalse(fs.isEmpty());
        assertEquals(2, fs.size());
        assertEquals(map,fs.get("flinstones"));
        assertEquals("value", fs.get("test"));


        // the next state it should be empty
        fs.next();


        assertTrue(fs.isEmpty());
        assertEquals(0,fs.size());
    }

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            WebUtils.storeGrailsWebRequest(webRequest);


            // Set the flash scope instance to its next state. We do
            // this here so that the flash is available from Grails
            // filters in a valid state.
            FlashScope fs = webRequest.getAttributes().getFlashScope(request);
            fs.next();


            // Pass control on to the next filter (or the servlet if
            // there are no more filters in the chain).
            filterChain.doFilter(request, response);
        }

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Related Classes of grails.web.mvc.FlashScope

org.grails.web.servlet.DefaultGrailsApplicationAttributes

org.grails.web.servlet.GrailsFlashScopeTests

org.grails.web.servlet.mvc.GrailsWebRequestFilter

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