Spring 2.5.2 recursive JSP

[renatopb]

Greetings,

I've just migrated from spring 2.0.8 to 2.5.2 and faced an unexpected problem.
In my application, I have a JSP that references itself, a recursive page. I use it to create a tree menu. The userMenu.jsp starts the menu and in case new levels, the recursiveMenu.jsp is called.

Here are their code
userMenu.jsp

<%@ include file="/WEB-INF/athena/jsp/header.jsp" %>
<div id="mainMenu" class="accordionMenu">
    <c:catch var="menuError">
        <c:forEach items="${model.menuTokens}" var="root">
            <c:if test="${not ud.permissions[root.token].invisible}">
                <dl>
                    <dt><f:message key="${root.token}" /></dt>
                    <dd>
                        <c:forEach items="${root.childNodes}" var="child">
                            <c:set var="node" value="${child}" scope="request" />
                            <c:import url="/rm.atn" />
                        </c:forEach>
                    </dd>
                </dl>
            </c:if>
        </c:forEach>
    </c:catch>
</div>
<c:if test="${not empty menuError}">${menuError}</c:if>

recursiveMenu.jsp

<?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ include file="/WEB-INF/athena/jsp/header.jsp" %>
<c:if test="${not ud.permissions[node.token].invisible}">
    <c:catch var="exception">
        <c:if test="${node.actionToken}"></c:if>
    </c:catch>
    <c:choose>
        <c:when test="${not empty exception}">
            <div id="${node.token}" class="treeMenu">
                <dl>
                    <dt><f:message key="${node.token}" /></dt>
                    <dd>
                        <c:forEach items="${node.childNodes}" var="child">
                            <c:set var="node" value="${child}" scope="request"/>
                            <c:import url="/rm.atn" />
                        </c:forEach>
                    </dd>
                </dl>
            </div>
        </c:when>
        <c:otherwise>
            <a onclick="getMDIC().openWindow('${node.action.token}', false);"><f:message key="${node.action.word}" /></a><br />
        </c:otherwise>
    </c:choose>
</c:if>

servlet.xml

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/" />
        <property name="suffix" value="" />
    </bean>
    
    <bean id="urlMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping">
        <property name="order" value="1" />
    </bean> 

    <bean name="/userMenu.atn" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
        <property name="viewName" value="athena/jsp/userMenu.jsp"/>
    </bean>

    <bean name="/rm.atn" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
        <property name="viewName" value="athena/jsp/recursiveMenu.jsp" />
    </bean>

'Til Spring 2.0.8, it all went well. But after the change, I started getting this message printed on my page instead of the menu:

javax.servlet.jsp.JspException: javax.servlet.jsp.JspException: Circular view path [/WEB-INF/athena/jsp/recursiveMenu.jsp]: already dispatched to this view path within the same request [/VisAct/WEB-INF/athena/jsp/main.jsp]. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

I was going to post the stack trace, but got a "text too long" warning hehehe. If needed be, ask for it and I'll work something out.

I read the 2.5.2 change log, and saw this:

* InternalResourceView detects circular dispatching to the same view even in case of pattern matches for same handler
* InternalResourceView prevents dispatch to same handler path only if the "preventDispatchLoop" flag is set to "true"

I'm not sure if this applies, but I don't exactly know what to do here.

Any ideas?

Cheers,

Renato Back

[wanderson]

I'm facing the same problem (exactly the same problem, hehehe) and to fix it I did this:

<bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/" />
        <property name="suffix" value="" />
</bean>

see you later!

[robhynes]

In my opinion - using "redirect:" is better. Use form backing object to retrieve the data you need for the page from a db. If the formBackingObject requires some parameters - pull them off the HttpRequest.
When returning the model and view - add the http get parameters to the end.