为什么我无法使ViewScope正常工作?每次都抛出错误 [英] Why can't I get ViewScope to work? Throws errors every time
本文介绍了为什么我无法使ViewScope正常工作?每次都抛出错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
好吧，我正在尝试做一些真正简单的事情.只是要注意，这在SessionScope上很好用.我有一个数据表，当我选择一行时，它需要更新用户可以编辑的表单.每次我尝试触发行选择器时，它都会随之返回.
Ok I'm trying to do something real simple. Just to note this works fine with SessionScope. I have a datatable and when I select a row it needs to update a form that a user could edit. Every time I try and fire the row selector it comes back with this.
SEVERE: Error Rendering View[/index.xhtml]
java.lang.IllegalStateException: PWC3999: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:2867)
at org.apache.catalina.connector.Request.getSession(Request.java:2561)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:920)
at com.sun.faces.context.ExternalContextImpl.getSession(ExternalContextImpl.java:155)
at com.sun.faces.renderkit.ServerSideStateHelper.writeState(ServerSideStateHelper.java:175)
at com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:122)
at com.sun.faces.application.StateManagerImpl.writeState(StateManagerImpl.java:166)
at com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter(WriteBehindStateWriter.java:225)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:418)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:662)
INFO: Exception when handling error trying to reset the response.
java.lang.IllegalStateException: PWC3999: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:2867)
at org.apache.catalina.connector.Request.getSession(Request.java:2561)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:920)
at com.sun.faces.context.ExternalContextImpl.getSession(ExternalContextImpl.java:155)
at com.sun.faces.renderkit.ServerSideStateHelper.writeState(ServerSideStateHelper.java:175)
at com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:122)
at com.sun.faces.application.StateManagerImpl.writeState(StateManagerImpl.java:166)
at com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter(WriteBehindStateWriter.java:225)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:418)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:662)
WARNING: StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
java.lang.IllegalStateException: PWC3999: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:2867)
at org.apache.catalina.connector.Request.getSession(Request.java:2561)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:920)
at com.sun.faces.context.ExternalContextImpl.getSession(ExternalContextImpl.java:155)
at com.sun.faces.renderkit.ServerSideStateHelper.writeState(ServerSideStateHelper.java:175)
at com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:122)
at com.sun.faces.application.StateManagerImpl.writeState(StateManagerImpl.java:166)
at com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter(WriteBehindStateWriter.java:225)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:418)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:662)
我觉得这是很常见的事情，但我无法使其正常工作.
I feel like this is something that is common to do but I can't make it work.
这是我的页面.
<p:growl id="growl" showDetail="true"/>
<h:form id="contactsForm">
<p:panel id="contactsPanel" >
<p:dataTable id="contactsTable" value="#{viewContacts.contactsList}" selection="#{editContacts.contact}" widgetVar="contactsTable" var="contacts"
rowSelectListener="#{viewContacts.rowSelect}" rowUnselectListener="#{viewContacts.rowUnSelect}"
onRowUnselectUpdate="editContactsForm" onRowSelectUpdate="editContactsForm"
selectionMode ="single"
paginator="true" rows ="15"
rowsPerPageTemplate="5,10,15,25,50,100"
paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}"
>
<f:facet name="header">
<p:outputPanel>
<h:outputText value="Search:" />
<p:inputText id="globalFilter" onkeyup="contactsTable.filter()" style="width:150px" />
</p:outputPanel>
</f:facet>
<p:column filterStyle="display:none" filterBy="#{contacts.name}" headerText="Name" style="width:200px">
<h:outputText value="#{contacts.name}" />
</p:column>
<p:column filterStyle="display:none" filterBy="#{contacts.street}" headerText="Street" style="width:280px">
<h:outputText value="#{contacts.street}" />
</p:column>
<p:column filterStyle="display:none" filterBy="#{contacts.city}" headerText="City" style="width:150px">
<h:outputText value="#{contacts.city}" />
</p:column>
<p:column filterStyle="display:none" filterBy="#{contacts.state}" headerText="State" style="width:50px">
<h:outputText value="#{contacts.state}" />
</p:column>
<p:column filterStyle="display:none" filterBy="#{contacts.zip}" headerText="Zip" style="width:100px">
<h:outputText value="#{contacts.zip}" />
</p:column>
<p:column filterStyle="display:none" filterBy="#{contacts.country}" headerText="Country" style="width:150px">
<h:outputText value="#{contacts.country}" />
</p:column>
<p:column filterStyle="display:none" filterBy="#{contacts.sent}" headerText="Sent" style="width:50px">
<h:outputText value="#{contacts.sent}" />
</p:column>
</p:dataTable>
</p:panel>
</h:form>
<br />
<br />
<h:form id="editContactsForm">
<p:panel id="editContactsPanel" rendered="#{editContacts.panelRendered}" closable="true" toggleable="true" >
<br />
<br />
<h:panelGrid id="editContactsPanelGrid" cellpadding="2" cellspacing="2" columns="3">
<h:outputText value="Name :" />
<p:inputText id="name" value="#{editContacts.contact.name}" style="width:400px" />
<p:message for="name" />
<h:outputText value="Email :" />
<p:inputText id="email" value="#{editContacts.contact.email}" style="width:400px"/>
<p:message id="emailMsg" for="email" />
<h:outputText value="Street :" />
<p:inputText id="street" value="#{editContacts.contact.street}" style="width:400px" />
<p:message for="street" />
<h:outputText value="City :" />
<p:inputText id="city" value="#{editContacts.contact.city}" style="width:400px" />
<p:message for="city" />
<h:outputText value="State :" />
<p:inputText id="state" value="#{editContacts.contact.state}" style="width:400px" >
</p:inputText>
<p:message id="stateMsg" for="state" />
<h:outputText value="Country :" />
<p:inputText id="country" value="#{editContacts.contact.country}" style="width:400px" />
<p:message for="country" />
<h:outputText value="Phone :" />
<p:inputText id="phone" value="#{editContacts.contact.phone}" style="width:400px"/>
<p:message id="phoneMsg" for="phone" />
<h:outputText value="Guests :" />
<p:inputText id="guests" value="#{editContacts.contact.guests}" style="width:400px"/>
<p:message for="guests" />
<h:outputText value="Arrival :" />
<p:calendar id="arrival" value="#{editContacts.contact.arrival}" showOn="button" />
<p:message for="arrival" />
<h:outputText value="Departure :" />
<p:calendar id="departure" value="#{editContacts.contact.departure}" showOn="button" />
<p:message for="departure" />
<h:outputText value="Message :" />
<p:inputTextarea id="message" effectDuration="30" style="width:400px;height:100px;" value="#{editContacts.contact.message}" />
<p:message for="message" />
<h:outputText value="Departure :" />
<p:calendar id="inserted" value="#{editContacts.contact.inserted}" showOn="button"/>
<p:message for="inserted" />
<h:outputText value="Sent :" />
<h:selectBooleanCheckbox id="sent" value="#{editContacts.contact.sent}" />
<p:message for="sent" />
<br />
</h:panelGrid>
<p:commandButton value="Submit" action="#{editContacts.doEditContact}" update="contactsForm, growl, phoneMsg" />
</p:panel>
</h:form>
后备豆.
@ManagedBean
@ViewScoped
public class ViewContacts implements Serializable {
@EJB
ContactService contactService;
@Inject
EditContacts editContacts;
private List<Contacts> contactsList;
public ViewContacts() {
contactsList = new ArrayList<Contacts>();
}
@PostConstruct
public void onLoad() {
updateContactsList();
}
public void rowSelect(SelectEvent event) {
editContacts.setPanelRendered(true);
editContacts.setContact((Contacts) event.getObject());
}
public void rowUnSelect(UnselectEvent event) {
editContacts.setContact(new Contacts());
editContacts.setPanelRendered(false);
}
public void updateContactsList() {
contactsList.clear();
contactsList = contactService.findAll();
}
public List<Contacts> getContactsList() {
return contactsList;
}
public void setContactsList(List<Contacts> contactsList) {
this.contactsList = contactsList;
}
}
感谢您的帮助.
推荐答案
好.我没有正确阅读视图范围.每页只能有一个表单.如果您具有多个窗体，则将多次创建该bean.祝你好运！
Ok. I didn't read view scope properly. You can only have one form per page. The bean is created multiple times if you have more than one form. Good luck!
这篇关于为什么我无法使ViewScope正常工作?每次都抛出错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
