Managing blob images using ADF and JSF or struts

Hello everyone. I am an ADF newbe and I am developing a web app. that has to manage (display, insert,update and delete) blob images from/to an oracle DB. I've seen the "howto" on image managing using intermedia and struts, but, for this new app I wanted to use JSF (something that is not mandatory) and, what is important is that the DB has already stored the images in blob format.
Can anybody point me in the right direction please??? Is there any howtos on this subject???
Thanks in advance.

jfin wrote:
but so far I have to say that I like the fact that I'll have to do very little
System.out.println(<..../>....<>....</>).Assuming that you rather mean out.println() where out is the ServletOutputStream reference returned by HttpServletResponse#getOutputStream(), I can only agree with you. That's certainly not the way how JSP/Servlet code is to be written. The maintainability, extendability, reusability and testability would be far below the freezing point then. You need to write presentation logic in JSP files, not in Servlets and absolutely not in scriptlets inside a JSP.
When you need to write presentation logic which may change per request, use JSTL and EL for that. Again, not scriptlets. For business and controlling logic, use Servlets. For transfer of data, use javabeans (DTO's, VO's). For data access logic, use DAO classes which are to be interacted by servlets.
JSF removes the need for creating Servlets and using JSTL/EL in JSP files. You just have JSP pages with JSF tags for presentation and javabeans for the request values and backing beans for business logic.
When would one use JSF over the other two? When Struts2? When Shale?And you ask that in a JSF forum? At least my opinion is predictable :)

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         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:693)
         at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:660)
         at org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:49)
         at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
         at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54)
         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174)
         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
         at java.lang.Thread.run(Unknown Source)
    Caused by: javax.faces.el.EvaluationException: org.jboss.jose.db.PropiedadesBean
         at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:78)
         at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:532)
         at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
         at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:378)
         ... 77 more
    Caused by: javax.faces.el.EvaluationException: Bean: org.jboss.jose.db.PropiedadesBean, property: allProperties
         at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:404)
         at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:71)
         ... 80 more
    Caused by: java.lang.reflect.InvocationTargetException
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
         at java.lang.reflect.Method.invoke(Unknown Source)
         at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:400)
         ... 81 more
    Caused by: java.lang.NullPointerException
         at org.jboss.jose.db.PropiedadesBean.getAllProperties(PropiedadesBean.java:71)
         ... 86 more
    10:20:30,001 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
    javax.faces.FacesException: Cannot get value for expression '#{PropiedadesBean.allProperties}'
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:693)
         at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:660)
         at org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:49)
         at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
         at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54)
         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174)
         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
         at java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.jasper.JasperException: Cannot get value for expression '#{PropiedadesBean.allProperties}'
         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         ... 50 more
    10:20:30,022 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
    javax.faces.FacesException: Cannot get value for expression '#{PropiedadesBean.allProperties}'
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:693)
         at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:660)
         at org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:49)
         at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
         at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54)
         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174)
         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
         at java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.jasper.JasperException: Cannot get value for expression '#{PropiedadesBean.allProperties}'
         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         ... 50 more
    10:20:30,032 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
    javax.faces.FacesException: Cannot get value for expression '#{PropiedadesBean.allProperties}'
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
         at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
         at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54)
         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174)
         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
         at java.lang.Thread.run(Unknown Source)
    Caused by: javax.servlet.ServletException: Cannot get value for expression '#{PropiedadesBean.allProperties}'
         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:121)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:693)
         at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:660)
         at org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:49)
         at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
         at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
         at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
         at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
         ... 25 moreMy jsf is that
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
        pageEncoding="ISO-8859-1"%>
    <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
    <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>propiedad</title>
    </head>
    <body>
    <f:view>
         <h:form id ="Properties">
              <h:dataTable id ="Propiedades" value="#{PropiedadesBean.allProperties}" var="prop" border="1">
                   <h:column>
                        <f:facet name="header">
                             <h:outputText value="Referencia"></h:outputText>
                        </f:facet>
                        <h:outputText value="#{prop.referencia}"></h:outputText>
                   </h:column>
                   <h:column>
                        <f:facet name="header">
                             <h:outputText value="Habitaciones"></h:outputText>
                        </f:facet>                    
                        <h:outputText value="#{prop.nHabitaciones}"></h:outputText>
                   </h:column>
              </h:dataTable>
         </h:form>
    </f:view>
    </body>
    </html>My bean is that
    import java.io.Serializable;
    import java.util.List;
    import java.util.ArrayList;
    import javax.ejb.Local;
    import javax.ejb.Remote;
    import javax.ejb.Stateless;
    import javax.faces.context.FacesContext;
    import javax.faces.el.ValueBinding;
    import javax.persistence.EntityManager;
    import javax.persistence.PersistenceContext;
    import javax.persistence.Query;
    @Stateless (name="propiedadesLocal")
    public class PropiedadesBean implements LocalPropiedades, Serializable {
         @PersistenceContext (unitName="test")
         private EntityManager em;
         public List <Propiedad> getAllProperties() {
              ArrayList<Propiedad> propiedades = new ArrayList<Propiedad>();
              ValueBinding beanValueBinding = facesContext.getApplication().createValueBinding("#{propiedadesBean.allProperties}");*/
              Query q = em.createQuery("From propiedades");
              for (Object o: q.getResultList()) {
                   propiedades.add((Propiedad) o);
              return propiedades; 
    }this statement doesn't work
    Query q = em.createQuery("From propiedades");
    When I put a checkpoint. I see the em variable is null.
    Here I've got only a function returns a ArrayList. This class implements the business logic.
    My another class implements the pesistence is that.
    package org.jboss.jose.db;
    import javax.persistence.*;
    import java.util.*;
    import java.io.Serializable;
    import javax.persistence.*;
    import javax.persistence.Id;
    @Entity
    @Table(name="propiedades")
    public class Propiedad implements Serializable{
         private int referencia;
         private double precio1;
         private String referenciaCliente;
         private int nHabitaciones;
         private int cuartosDeBa�o;
         private Empleado empleado;
         //static final long serialVersionUID = 1L;;
         public Propiedad(){};
         public int getCuartosDeBa�o() {
              return cuartosDeBa�o;
         public void setCuartosDeBa�o(int cuartosDeBa�o) {
              this.cuartosDeBa�o = cuartosDeBa�o;
         public int getNHabitaciones() {
              return nHabitaciones;
         public void setNHabitaciones(int habitaciones) {
              nHabitaciones = habitaciones;
         public double getPrecio1() {
              return precio1;
         public void setPrecio1(double precio1) {
              this.precio1 = precio1;
         @Id //(generate = GeneratorType.AUTO)
         @GeneratedValue
         @Column (name = "Referencia")     
         public int getReferencia() {
              return referencia;
         public void setReferencia(int referencia) {
              this.referencia = referencia;
         public String getReferenciaCliente() {
              return referenciaCliente;
         public void setReferenciaCliente(String referenciaCliente) {
              this.referenciaCliente = referenciaCliente;
         //@JoinColumn (name = "idEmpleado")
         @ManyToOne
         public Empleado getEmpleado() {
              return empleado;
         public void setEmpleado(Empleado empleado) {
              this.empleado = empleado;
    The servlet that works
    package org.jboss.jose.web;
    import javax.servlet.http.HttpServlet;
    import java.io.IOException;
    import java.io.PrintWriter;
    import javax.naming.Context;
    import javax.naming.InitialContext;
    import javax.naming.NamingException;
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    //import java.io.IOException;
    import org.jboss.jose.db.*;
    //import org.jboss.ejb.PropiedadesBean;
    public class PropiedadServlet extends HttpServlet {
         private LocalPropiedades propiedadesBean;
         private EmpleadosBean empleadosBean;
         protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {          
              this.mostrarPropiedades(req, resp);
         public void init() throws ServletException {
              try {
                   Context context = new InitialContext();
                   this.propiedadesBean = (LocalPropiedades) context.lookup("inmovil/propiedadesLocal/local");
                   this.propiedadesBean.addEmpleadoPropiedad("jose",1,"1",1000.00,"1000",1,1);          
              } catch (NamingException e) {
                   // TODO Auto-generated catch block
                   System.out.println(e.getMessage());
    //               e.printStackTrace();
         private void mostrarPropiedades(HttpServletRequest req, HttpServletResponse resp) throws ServletException ,IOException {
              PrintWriter out = resp.getWriter();
              for (Propiedad prop: this.propiedadesBean.getAllProperties()) {
                   out.p                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

    I think that I don't load. But I don't know where I write the below line.Than it's clear that you'll get a NullPointerException.
    But I don't know where I write the below line.
    Context context = new InitialContext();
    this.propiedadesBean = (LocalPropiedades)
    context.lookup("inmovil/propiedadesLocal/local");Whenever you need it. For example within an ActionHandler which loads the bean
    and makes a DTO Object (Bean used by the JSF Page) available for the JSF Page.
    But where you actually have to load the Bean depends on your design.
    andi

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