Servlets in long running conversations
burtoncarl Jan 13, 2008 9:37 PMI'm trying to access objects from a long running conversation from withing a servlet. I haven't had much sucess though. So I've created a very simple servlet to simply access a conversation. Throughout my app seam adds "cid" for the conversation id in the parameters list. although for my testing I have been adding both cid and conversationId to the request.
I've tried adding
<web:context-filter url-pattern="/servlet/*" />
to components.xml and/or
<filter> <filter-name>Seam Servlet Filter</filter-name> <filter-class>org.jboss.seam.servlet.SeamServletFilter</filter-class> </filter> <filter-mapping> <filter-name>Seam Servlet Filter</filter-name> <url-pattern>/servlet/*</url-pattern> </filter-mapping>
to the web.xml, both met with failure. I am able to access objects with Component.getInstance("someName"), but not within my conversation.
Here are the bits of code I am able to share.
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <!-- Ajax4jsf setup --> <filter> <display-name>RichFaces Filter</display-name> <filter-name>richfaces</filter-name> <filter-class>org.ajax4jsf.Filter</filter-class> </filter> <filter-mapping> <filter-name>richfaces</filter-name> <servlet-name>Faces Servlet</servlet-name> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> </filter-mapping> <context-param> <param-name>org.ajax4jsf.VIEW_HANDLERS</param-name> <param-value>org.jboss.seam.ui.facelet.SeamFaceletViewHandler</param-value> </context-param> <context-param> <param-name>javax.faces.CONFIG_FILES</param-name> <param-value>/WEB-INF/navigation.xml</param-value> </context-param> <listener> <listener-class>org.jboss.seam.servlet.SeamListener</listener-class> </listener> <context-param> <param-name>org.richfaces.SKIN</param-name> <param-value>csc2</param-value> </context-param> <context-param> <param-name>javax.faces.STATE_SAVING_METHOD</param-name> <param-value>client</param-value> </context-param> <context-param> <param-name>facelets.DEVELOPMENT</param-name> <param-value>true</param-value> </context-param> <context-param> <param-name>javax.faces.DEFAULT_SUFFIX</param-name> <param-value>.xhtml</param-value> </context-param> <context-param> <param-name>facelets.SKIP_COMMENTS</param-name> <param-value>true</param-value> </context-param> <filter> <filter-name>Seam Filter</filter-name> <filter-class>org.jboss.seam.web.SeamFilter</filter-class> </filter> <filter-mapping> <filter-name>Seam Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- <filter> <filter-name>Seam Context Filter</filter-name> <filter-class>org.jboss.seam.web.ContextFilter</filter-class> </filter> <filter-mapping> <filter-name>Seam Context Filter</filter-name> <url-pattern>/servlet/*</url-pattern> </filter-mapping> <filter> <filter-name>Seam Multipart Filter</filter-name> <filter-class>org.jboss.seam.web.MultipartFilter</filter-class> </filter> <filter-mapping> <filter-name>Seam Multipart Filter</filter-name> <url-pattern>*.xhtml</url-pattern> </filter-mapping> --> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.htm</url-pattern> </servlet-mapping> <!-- <filter> <filter-name>Seam Servlet Filter</filter-name> <filter-class>org.jboss.seam.servlet.SeamServletFilter</filter-class> </filter> <filter-mapping> <filter-name>Seam Servlet Filter</filter-name> <url-pattern>/servlet/*</url-pattern> </filter-mapping> --> <servlet> <description>For testing conversations within servlet</description> <display-name>ConversationTestServlet</display-name> <servlet-name>ConversationTestServlet</servlet-name> <servlet-class>com.gdi.csc.servlet.ConversationTestServlet</servlet-class> <load-on-startup>3</load-on-startup> </servlet> <servlet-mapping> <servlet-name>ConversationTestServlet</servlet-name> <url-pattern>/servlet/conversation</url-pattern> </servlet-mapping> <security-constraint> <!-- This stops the user from replacing the .htm extensino with .xhtml to read the source files... --> <display-name>Restrict XHTML Documents</display-name> <web-resource-collection> <web-resource-name>XHTML</web-resource-name> <url-pattern>*.xhtml</url-pattern> </web-resource-collection> <auth-constraint> <role-name>NONE</role-name> </auth-constraint> </security-constraint> <session-config> <session-timeout>30</session-timeout> </session-config> <!-- <error-page> <error-code>404</error-code> <location>/home.htm</location> </error-page> --> </web-app>
components.xml
<?xml version="1.0" encoding="UTF-8"?> <components xmlns="http://jboss.com/products/seam/components" xmlns:core="http://jboss.com/products/seam/core" xmlns:security="http://jboss.com/products/seam/security" xmlns:framework="http://jboss.com/products/seam/framework" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:web="http://jboss.com/products/seam/web" xmlns:mail="http://jboss.com/products/seam/mail" xsi:schemaLocation= "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-1.2.xsd http://jboss.com/products/seam/security http://jboss.com/products/seam/security-1.2.xsd http://jboss.com/products/seam/framework http://jboss.com/products/seam/framework-1.2.xsd http://jboss.com/products/seam/components http://jboss.com/products/seam/components-1.2.xsd http://jboss.com/products/seam/web http://jboss.com/products/seam/web-1.2.xsd" > <core:init debug="true" jndi-pattern="#{ejbName}/local"/> <!-- 120 second conversation timeout --> <core:manager conversation-timeout="120000" concurrent-request-timeout="1000" conversation-id-parameter="cid" conversation-is-long-running-parameter="clr"/> <!-- <core:jbpm> <core:process-definitions> <value>ordermanagement1.jpdl.xml</value> </core:process-definitions> <core:pageflow-definitions> <value>checkout.jpdl.xml</value> <value>newuser.jpdl.xml</value> </core:pageflow-definitions> </core:jbpm> --> <core:ejb installed="true"/> <!-- <core:microcontainer installed="true"/> --> <security:identity authenticate-method="#{csc2authenticator.authenticate}"/> <event type="org.jboss.seam.notLoggedIn"> <action expression="#{redirect.captureCurrentView}"/> </event> <event type="org.jboss.seam.postAuthenticate"> <action expression="#{redirect.returnToCapturedView}"/> </event> <core:managed-persistence-context name="entityManager" auto-create="true" persistence-unit-jndi-name="java:/myEntityFactory" /> <!--factory for "session" property used to have an ability to inject Hibernate session object directly in the @In Session session;--> <factory name="session" auto-create="true" scope="STATELESS" value="#{entityManager.delegate}"/> <!-- Conversation propagation with redirects --> <web:redirect-filter url-pattern="*.htm"/> <!-- Context management for custom servlets --> <web:context-filter url-pattern="/servlet/*" /> <!--To enable file upload capability max-request-size - maximum file size in bytes --> <web:multipart-filter auto-create="true" class="org.jboss.seam.web.MultipartFilter" max-request-size="4000000" url-pattern="*.htm"/> <!-- Mail session component--> <mail:mail-session scope="application" host="#{applicationProperties.smtpHost}" port="#{applicationProperties.smtpPort}" username="#{applicationProperties.smtpUserName}" password="#{applicationProperties.smtpPassword}"/> <!-- <component class="org.jboss.seam.web.MultipartFilter"> <property name="maxRequestSize">4000000</property> </component> --> </components>
ConversationTestServlet.java
/** * Copyright 2008 CoActive Marketing Group */ package com.gdi.csc.servlet; import java.io.IOException; import java.util.ArrayList; import java.util.Enumeration; import javax.faces.event.PhaseId; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.log4j.Logger; import org.jboss.seam.Component; import org.jboss.seam.contexts.ContextAdaptor; import org.jboss.seam.contexts.Lifecycle; import org.jboss.seam.core.Conversation; import org.jboss.seam.core.Manager; /** * @author Burton Hodges * */ @SuppressWarnings("serial") public class ConversationTestServlet extends HttpServlet { private static Logger logger = Logger.getLogger(ThumbServlet.class); @Override protected void doGet(HttpServletRequest request, HttpServletResponse resp) throws ServletException, IOException { debugRequestParameters(request); debugConversation(request); } private void debugConversation(HttpServletRequest request){ try{ // HttpSession session = request .getSession(true); // Lifecycle.setPhaseId(PhaseId.INVOKE_APPLICATION); // Lifecycle.setServletRequest(request); // Lifecycle.beginRequest(getServletContext(), session, request); // Manager.instance().restoreConversation(request.getParameterMap()); // Lifecycle.resumeConversation(session); // Manager.instance().handleConversationPropagation(request.getParameterMap()); { logger.info("debugConversation: trying Component.getInstance(\"conversation\")"); Object o = Component.getInstance("conversation"); if(o==null){ logger.info("debugConversation: Component.getInstance(\"conversation\") returned null"); }else{ logger.info("debugConversation: object is instance of "+o.getClass().getName()); debugConversation(Conversation.class.cast(o)); } } logger.info("debugConversation: trying Conversation.instance()"); debugConversation(Conversation.instance()); // Manager.instance().endRequest(ContextAdaptor.getSession(session)); // Lifecycle.endRequest(session); }catch (Exception e){ logger.info("debugConversation: Error occured debuging seam conversation", e); } } private void debugConversation(Conversation conversation){ if(conversation==null){ logger.info("debugConversation: conversation is null"); return; } logger.info("debugConversation: "+conversation); logger.info("debugConversation: "+conversation.getId()); logger.info("debugConversation: "+conversation.getParentId()); logger.info("debugConversation: "+conversation.getRootId()); logger.info("debugConversation: "+conversation.getViewId()); } @SuppressWarnings("unchecked") private void debugRequestParameters(HttpServletRequest request){ logger.info("debugRequestParameters: Debugging request parameters"); ArrayList<String> keys = new ArrayList<String>(); Enumeration e = request.getParameterNames(); while(e.hasMoreElements()) keys.add(e.nextElement().toString()); for(String key: keys) logger.info("debugRequestParameters: "+key+"="+request.getParameter(key)); } }
and an excerpt from my log file:
2008-01-13 21:18:33,828 [http-8080-Processor25] INFO - debugRequestParameters: Debugging request parameters 2008-01-13 21:18:33,828 [http-8080-Processor25] INFO - debugRequestParameters: conversationId=1 2008-01-13 21:18:33,828 [http-8080-Processor25] INFO - debugRequestParameters: cid=1 2008-01-13 21:18:33,828 [http-8080-Processor25] INFO - debugConversation: trying Component.getInstance("conversation") 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: object is instance of org.jboss.seam.core.Conversation 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: org.jboss.seam.core.Conversation@2eb6e9 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: 2 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: null 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: 2 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: null 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: trying Conversation.instance() 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: org.jboss.seam.core.Conversation@2eb6e9 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: 2 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: null 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: 2 2008-01-13 21:18:33,843 [http-8080-Processor25] INFO - debugConversation: null
Any help would be appreciated!
Thanks in advance.