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POSpring webflow + portal - How do you get url parameters in the flow definition?
 

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  1. POSpring webflow + portal - How do you get url parameters in the flow definition?
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    <p>I am kinda new to the portals and spring webflow and trying to combine them for the purpose of setting flows for various user tasks. My problem is that I need to generate a direct URL to the first state and pass in the name of the subflow as a parameter so the right subflow is executed from there onwards - I don't know how to get that parameter.</p> <p>Here is my context config</p> <pre><code>&lt;!-- Maps portlet modes to handlers --&gt; &lt;bean id="portletModeHandlerMapping" class="org.springframework.web.portlet.handler.PortletModeHandlerMapping"&gt; &lt;property name="portletModeMap"&gt; &lt;map&gt; &lt;entry key="view"&gt; &lt;bean class="com.mycompany.login.portlet.ViewFlowHandler" /&gt; &lt;/entry&gt; &lt;/map&gt; &lt;/property&gt; &lt;/bean&gt; &lt;!-- Enables FlowHandlers --&gt; &lt;bean class="org.springframework.webflow.mvc.portlet.FlowHandlerAdapter"&gt; &lt;property name="flowExecutor" ref="flowExecutor"/&gt; &lt;/bean&gt; &lt;!-- Executes flows: the central entry point into the Spring Web Flow system --&gt; &lt;webflow:flow-executor id="flowExecutor"&gt; &lt;/webflow:flow-executor&gt; &lt;!-- The registry of executable flow definitions --&gt; &lt;webflow:flow-registry id="flowRegistry" flow-builder-services="flowBuilderService"&gt; &lt;webflow:flow-location path="classpath:flows/login-flow.xml" /&gt; &lt;webflow:flow-location path="classpath:flows/main-flow.xml" /&gt; &lt;webflow:flow-location path="classpath:flows/pwd-recovery-flow.xml" /&gt; &lt;/webflow:flow-registry&gt; &lt;webflow:flow-builder-services id="flowBuilderService" view-factory-creator="viewFactoryCreator"/&gt; &lt;bean id="viewFactoryCreator" class="org.springframework.webflow.mvc.builder.MvcViewFactoryCreator"&gt; &lt;property name="viewResolvers"&gt; &lt;list&gt; &lt;ref bean="viewResolver"/&gt; &lt;/list&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"&gt; &lt;property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/&gt; &lt;property name="prefix" value="/WEB-INF/flow-views/"/&gt; &lt;property name="suffix" value=".jsp"/&gt; &lt;/bean&gt; &lt;!-- beans for business logic --&gt; &lt;bean id="authService" class="com.mycompany.login.portlet.service.AuthService" scope="prototype" /&gt; &lt;!-- constants --&gt; &lt;bean id="flowNames" class="com.mycompany.login.portlet.Flows" scope="singleton"&gt; &lt;property name="loginMain"&gt;&lt;value&gt;&lt;/value&gt;&lt;/property&gt; &lt;property name="passwordRecover"&gt;&lt;value&gt;pwd-recovery&lt;/value&gt;&lt;/property&gt; &lt;property name="finish"&gt;&lt;value&gt;finish&lt;/value&gt;&lt;/property&gt; &lt;property name="nflow"&gt;&lt;value&gt;&lt;/value&gt;&lt;/property&gt; &lt;/bean&gt; </code></pre> <p></p> <p>My flow handler:</p> <pre><code>package com.mycompany.login.portlet; import javax.servlet.http.HttpServletRequest; import org.springframework.webflow.core.collection.LocalAttributeMap; import org.springframework.webflow.core.collection.MutableAttributeMap; import org.springframework.webflow.mvc.portlet.AbstractFlowHandler; public class ViewFlowHandler extends AbstractFlowHandler{ public String getFlowId() { return "main-flow"; } } </code></pre> <p>And the point of entry is the main-flow which based on the get parameter in the url called "flo" will redirect to a sub-flow. Currently when I try to access this directly, my requestParameter map is blank. I don't know what the url would be in this case. An example of the current URL is "http://localhost:8080/portal/portal/default/Login/Mycompany+LoginWindow?flo=pwd-recovery". Also later on I want to pass in additional parameters in the URL such as userid etc. but I'm getting a blank map for requestParameters right now. Here is my entry point flow definition</p> <p>main-flow.xml</p> <p></p> <p>http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd"></p> <pre><code>&lt;action-state id="branch"&gt; &lt;on-entry&gt; &lt;!-- &lt;evaluate expression="flowNames.setNflow(requestParameters.flo)"/&gt; --&gt; &lt;evaluate expression="flowNames.checking(requestParameters)"/&gt; &lt;/on-entry&gt; &lt;evaluate expression="flowNames.enableTransition()" /&gt; &lt;transition on="yes" to="proceed" /&gt; &lt;/action-state&gt; &lt;action-state id="proceed"&gt; &lt;!--&lt;if test="flowNames.nflow==''" then="login"/&gt; &lt;if test="flowNames.nflow=='pwd-recovery'" then="pwd-recovery"/&gt; &lt;if test="flowNames.nflow=='finish'" then="finish-main"/&gt;--&gt; &lt;on-entry&gt; &lt;!-- &lt;evaluate expression="flowNames.setNflow(requestParameters.flo)"/&gt; --&gt; &lt;evaluate expression="flowNames.checking(requestParameters)"/&gt; &lt;/on-entry&gt; &lt;evaluate expression="flowNames.nflow"/&gt; &lt;transition on="pwd-recovery" to="pwd-recovery"/&gt; &lt;transition on="finish" to="finish-main"/&gt; &lt;transition to="login"/&gt; &lt;/action-state&gt; &lt;subflow-state id="login" subflow="login-flow"&gt; &lt;transition on="finish-login" to="proceed"/&gt; &lt;/subflow-state&gt; &lt;subflow-state id="pwd-recovery" subflow="pwd-recovery-flow"&gt; &lt;transition on="finish-pwd" to="proceed"/&gt; &lt;/subflow-state&gt; &lt;end-state id="finish-main"/&gt; </code></pre> <p></p>
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