我正在使用 JSF (Mojarra 2.2.6) 和 Primefaces 5.13 构建一个 Java EE 7 webapp，在 Glassfish 4.1 网络服务器上运行。
现在我遇到了 conversationScoped bean (CDI) 的问题。
我想做的是：使用 primefaces autoCompleteText 选择客户并显示他/她的详细信息。此外，我想停止旧对话（以便彻底重置所有 bean）并立即开始新的对话。
只要我先使用 ap:commandButton 结束旧对话，然后通过 autocompleteText 中的 p:ajax itemSelect 事件开始新对话，它就可以正常工作。
但它不起作用，当我结束旧对话并通过一个 itemSelect 事件开始新对话时。在这种情况下，我得到 NonExistantConversationException：
2015-03-26T14:23:24.834+0100|Warnung: StandardWrapperValve[Faces Servlet]: Servlet.service() for servlet Faces Servlet threw exception
org.jboss.weld.context.NonexistentConversationException: WELD-000321: No conversation found to restore for id 1
at org.jboss.weld.context.AbstractConversationContext.initialize(AbstractConversationContext.java:259)
at org.jboss.weld.context.http.LazyHttpConversationContextImpl.initialize(LazyHttpConversationContextImpl.java:68)
at org.jboss.weld.context.http.LazyHttpConversationContextImpl.checkContextInitialized(LazyHttpConversationContextImpl.java:93)
at org.jboss.weld.context.AbstractContext.get(AbstractContext.java:74)
at org.jboss.weld.context.PassivatingContextWrapper$AbstractPassivatingContextWrapper.get(PassivatingContextWrapper.java:76)
at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:740)
at org.jboss.weld.el.AbstractWeldELResolver.lookup(AbstractWeldELResolver.java:107)
at org.jboss.weld.el.AbstractWeldELResolver.getValue(AbstractWeldELResolver.java:90)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:188)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:116)
at com.sun.el.parser.AstValue.getBase(AstValue.java:151)
at com.sun.el.parser.AstValue.getTarget(AstValue.java:170)
at com.sun.el.parser.AstValue.invoke(AstValue.java:272)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at com.sun.faces.facelets.tag.jsf.core.DeclarativeSystemEventListener.processEvent(EventHandler.java:128)
at javax.faces.component.UIComponent$ComponentSystemEventListenerAdapter.processEvent(UIComponent.java:2585)
at javax.faces.event.SystemEvent.processListener(SystemEvent.java:108)
at javax.faces.event.ComponentSystemEvent.processListener(ComponentSystemEvent.java:118)
at com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:2187)
at com.sun.faces.application.ApplicationImpl.invokeComponentListenersFor(ApplicationImpl.java:2135)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:289)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:247)
at javax.faces.application.ApplicationWrapper.publishEvent(ApplicationWrapper.java:726)
at javax.faces.application.ApplicationWrapper.publishEvent(ApplicationWrapper.java:726)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:724)
2015-03-26T14:23:24.837+0100|Schwerwiegend: FullAjaxExceptionHandler: An exception occurred during processing JSF ajax request. Error page '/error/NonexistentConversationException.xhtml?nocid=true' will be shown.
org.jboss.weld.context.NonexistentConversationException: WELD-000321: No conversation found to restore for id 1
at org.jboss.weld.context.AbstractConversationContext.initialize(AbstractConversationContext.java:259)
at org.jboss.weld.context.http.LazyHttpConversationContextImpl.initialize(LazyHttpConversationContextImpl.java:68)
at org.jboss.weld.context.http.LazyHttpConversationContextImpl.checkContextInitialized(LazyHttpConversationContextImpl.java:93)
at org.jboss.weld.context.AbstractContext.get(AbstractContext.java:74)
at org.jboss.weld.context.PassivatingContextWrapper$AbstractPassivatingContextWrapper.get(PassivatingContextWrapper.java:76)
at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:740)
at org.jboss.weld.el.AbstractWeldELResolver.lookup(AbstractWeldELResolver.java:107)
at org.jboss.weld.el.AbstractWeldELResolver.getValue(AbstractWeldELResolver.java:90)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:188)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:116)
at com.sun.el.parser.AstValue.getBase(AstValue.java:151)
at com.sun.el.parser.AstValue.getValue(AstValue.java:200)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:226)
at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
at org.primefaces.component.datatable.DataTable.getFilteredValue(DataTable.java:360)
at org.primefaces.component.datatable.DataTable.processEvent(DataTable.java:1621)
at com.sun.faces.lifecycle.RestoreViewPhase$1.visit(RestoreViewPhase.java:440)
at com.sun.faces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:151)
at org.primefaces.component.api.UIData.visitTree(UIData.java:821)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at org.primefaces.component.api.UITabPanel.visitTree(UITabPanel.java:920)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1701)
at com.sun.faces.lifecycle.RestoreViewPhase.deliverPostRestoreStateEvent(RestoreViewPhase.java:436)
at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:273)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:121)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:724)
这里是 XHTML 代码：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets">
<p:focus id="patSuchfeldFocus" for="patientenSuchFeld" />
<p:remoteCommand name="rc"
actionListener="#{patContDesk.setCurrentPatientUndKillView()}" />
<h:panelGrid columns="5"
columnClasses="patSuche_label, d_span5, patSucheNach_label, span2, patSuche_label"
style="margin-top:4px;">
<h:outputText value="Suche:" style="position:relative;top:-4px;" />
<p:autoComplete disabled="#{!patContDesk.isRenderMenuBar()}"
style=" padding-bottom: 8px;" label="Suche:" autocomplete="true"
id="patientenSuchFeld" onclick="this.select();"
emptyMessage="#{stringKonstanten.keineSuchergebnisse}"
minQueryLength="1" queryDelay="400"
value="#{patSuchContDesk.aktPatSuchErgebnis}" var="pat"
itemLabel="#{patSuchContDesk.suchPatToString(pat)}"
itemValue="#{pat}" converter="patient"
completeMethod="#{patSuchContDesk.complete}" size="40">
<p:ajax event="itemSelect" process="@form"
listener="#{patContDesk.setCurrentPatientUndKillView()}" />
<p:ajax event="itemSelect" process="@all"
listener="#{patSuchContDesk.goToNextPagedsk()}" />
</p:autoComplete>
<h:outputText value="Suchen nach:" style="position:relative;top:-4px;" />
<p:selectOneMenu disabled="#{!patContDesk.isRenderMenuBar()}"
id="aktuellerSuchModus" value="#{patSuchContDesk.aktSuchModus}"
style="position:relative;top:-5px; height:34px;">
<f:selectItems value="#{patSuchContDesk.getPatientenSuchModi()}" />
<p:ajax event="change" update=":content" process="@this" />
</p:selectOneMenu>
<h:panelGroup layout="block" styleClass="d_menubar"
style="width:110% !important;position:relative;top:-3px;">
<div style="height: 8px;"></div>
<h:commandLink style="padding-left:10px;"
actionListener="#{patContDesk.resetAndSwitchToTabX(0)}"
disabled="#{(!permCheck.darfAnlegenUndAendern('PAT')) or !(patContDesk.isRenderMenuBar())}"
immediate="true" update=":content"
action="#{patContDesk.initConversation('', '')}"
tabindex="#{nav.indexForAccesKey}">
<i class="icon-user-2 hardblue"><h:outputText
value="Patient neu anlegen"
style="padding-left:5px; font-style:normal; color: #303030;" /></i>
</h:commandLink>
<p:commandButton value="Navtest" update=":content"
action="#{patSuchContDesk.endConv()}"
actionListener="#{patContDesk.setCurrentPatientUndKillView()}" />
<p:commandButton value="Navtest Raoul2"
actionListener="#{patSuchContDesk.endConv()}"
action="/pages/desktop/test/TestRaoul2.xhtml?faces-redirect=true" />
</h:panelGroup>
</h:panelGrid>
</ui:composition>
这是支持bean的（相关）代码：
@ViewScoped
@ManagedBean(name = "patSuchController")
public class PatientSuchController extends MMController implements Serializable {
//Fields + getters + setters
public void setCurrentPatientUndKillView() {
currentPatient = null;
updateView("content");
endConv();
}
public void endConv() {
if (!conv.isTransient()) {
System.out.println("patContDesk wird beendet...");
conv.end();
}
}
public void updateView(String viewToUpdate) {
RequestContext ctx = RequestContext.getCurrentInstance();
ctx.update(viewToUpdate);
}
public void goToNextPagedsk() {
String ziel = "";
ziel = "/pages/desktop/adressen/pat/Patient2.xhtml?faces-redirect=true";
String param = "patId=" + aktPatSuchErgebnis[0];
String from = pK.getPatSuche();
nav.goToXYNeu(ziel, from, param);
}
@Named("nav")
@ConversationScoped
public class Navigation extends MMController implements Serializable {
//Fields + getters + setters
public void goToXYNeu(String ziel, String from, String param) {
FacesContext fctx = FacesContext.getCurrentInstance();
Application application = fctx.getApplication();
NavigationHandler navHandler = application.getNavigationHandler();
StringBuilder sb = new StringBuilder();
sb.append(ziel);
sb.append("&");
sb.append(param);
String zielUrlKomplett = baueNavPfad(sb.toString(), true);
System.out.println("goToXY: " + zielUrlKomplett);
navHandler.handleNavigation(fctx, null, zielUrlKomplett);
}
所以，问题是：在用户从 primefaces autoCompleteText 中选择客户的那一刻，通常是否有可能停止一个 cdi 对话并立即开始一个新的对话？
非常感谢您的帮助！
编辑：新对话由目标页面上的此 preRenderView 事件启动：
<f:event listener="#{patContDesk.initConversation(nav.getParam('patId'), nav.getPfadParameter())}"
type="preRenderView" />
...在我的支持 bean 中使用此方法：
@Named
@ConversationScoped
public class PatientController extends MMController {
// Fields, getters + setters...
public void initConversation(String neuPatId, String from) {
if (!FacesContext.getCurrentInstance().isPostback()
&& conv.isTransient()) {
conv.begin();
nav.pushPfad(pK.getPatient(), true);
// 30 Minuten Timeout.
conv.setTimeout(1800000);
System.out.println("aktPatId: " + neuPatId);
System.out.println("beginConv PatControl: " + conv.getId());
}
}
唯一需要做的就是删除 autoCompleteText 的第一个 itemSelect 事件并使用 rc() 在 onclick-client-side callbackhandler 中调用 p:remoteCommand;