使用 <f:websocket /> 的 Websocket CdiUtils NPE
Websocket CdiUtils NPE using <f:websocket />
此应用程序在 TC7、Spring 3 和 JSF 2.2 中运行良好，但我想添加 JSF 2.3 的推送功能，因此我升级到 TC 9.0.8、Spring 5.0 .5 和 JSF 2.3.0 由于升级而出现了一些简单的初始问题应用程序部署正常并且 Spring 安全有效（我可以登录）但随后出现此错误：
May 11, 2018 2:24:06 PM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/index.xhtml]
java.lang.NullPointerException
at com.sun.faces.cdi.CdiUtils.getBeanReferenceByType(CdiUtils.java:230)
at com.sun.faces.cdi.CdiUtils.getBeanReference(CdiUtils.java:213)
at com.sun.faces.renderkit.html_basic.WebsocketRenderer.encodeEnd(WebsocketRenderer.java:111)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:949)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1912)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1908)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1908)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:491)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:194)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:151)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:126)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:223)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:671)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:412)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1385)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
我的调试器显示 CdiUtils:230 上的 beanManager 为空，我怀疑但无法确认 CdiUtils:213 上的 FacesContext 为空。我怀疑这是由于同时拥有多个容器（Tomcat、CDI、Spring 和 JSF）造成的混淆。我确实喜欢Spring Security、RestTemplate 和JdbcTemplate，所以我有点舍不得Spring。这是我的推豆。我把所有注释都放在上面：
@Component
@Scope("Application")
public class PushBean implements Serializable {
private static final long serialVersionUID = -6558314691176100417L;
@Inject
@Push(channel = "facilitatorBroadcastMessages")
private PushContext push;
private String facilitatorBroadcastMessage;
public void setFacilitatorBroadcastMessage(String message) {
this.facilitatorBroadcastMessage = message;
}
public void broadcastFacilitatorMessage() {
push.send(facilitatorBroadcastMessage);
}
}
发送消息的 Facelet 代码：
<p:button value="Send Broadcast Message to All Users" onclick="PF('broadcastMessageDialog').show(); " />
<p:dialog id="broadcastMessageDialog" header="Facilitator Message" widgetVar="broadcastMessageDialog" height="500px">
<p:inputText id="facilitatorBroadcastMessageInput" value="#{pushBean.facilitatorBroadcastMessage}" />
<p:commandButton onclick="PF('broadcastMessageDialog').hide(); " value="Send" process="@parent" action="#{pushBean.broadcastFacilitatorMessage()}" />
</p:dialog>
JS websocket 侦听器：
function websocketListener(message, channel, event) {
$("#facilitatorBroadcastMessage").innerHTML = message;
PF('facilitatorBroadcastMessageDialog').show();
}
用于显示消息的 JSF websocket 标记和代码：
<f:websocket channel="facilitatorBroadcastMessages" onmessage="webSocketListener" />
<p:dialog id="facilitatorBroadcastMessageDialog" header="Facilitator Message" widgetVar="facilitatorBroadcastMessageDialog" height="500px">
<p id="facilitatorBroadcastMessage"></p>
<p:button onclick="PF('facilitatorBroadcastMessageDialog').hide(); " value="Got it, thanks!"/>
</p:dialog>
有什么解决办法吗？
看看这个http://balusc.omnifaces.org/2013/10/how-to-install-cdi-in-tomcat.html。您需要安装 Weld。
您需要执行以下三个步骤：
- 将 weld-servlet-shaded.jar 放到 webapp 的 /WEB-INF/lib 中。如果您使用 Maven，这是坐标：
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet-shaded</artifactId>
<version>3.0.3.Final</version>
</dependency>
- 在 webapp 的 Web 内容中创建 /META-INF/context.xml 文件，内容如下（或者，如果您已经有一个，只需添加条目）：
<Context>
<Resource name="BeanManager"
auth="Container"
type="javax.enterprise.inject.spi.BeanManager"
factory="org.jboss.weld.resources.ManagerObjectFactory" />
</Context>
这将在 Tomcat 的 JNDI 中注册 Weld 的 BeanManager 工厂。这不能由 Weld 以编程方式执行，因为 Tomcat 的 JNDI 是严格只读的。如果您的目标至少是 Mojarra 2.2.11 and/or OmniFaces 2.4 或更新版本，则无需执行此步骤。两者都能够在 ServletContext 中找到它。但是，可能还有其他库仍希望在 JNDI 中找到 BeanManager，那么您最好为这些库保留此配置文件。
- 创建一个（空）/WEB-INF/beans.xml 文件（不，不在 /META-INF 中！这仅适用于内部 JAR 文件，例如 OmniFaces）。
此应用程序在 TC7、Spring 3 和 JSF 2.2 中运行良好，但我想添加 JSF 2.3 的推送功能，因此我升级到 TC 9.0.8、Spring 5.0 .5 和 JSF 2.3.0 由于升级而出现了一些简单的初始问题应用程序部署正常并且 Spring 安全有效（我可以登录）但随后出现此错误：
May 11, 2018 2:24:06 PM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/index.xhtml]
java.lang.NullPointerException
at com.sun.faces.cdi.CdiUtils.getBeanReferenceByType(CdiUtils.java:230)
at com.sun.faces.cdi.CdiUtils.getBeanReference(CdiUtils.java:213)
at com.sun.faces.renderkit.html_basic.WebsocketRenderer.encodeEnd(WebsocketRenderer.java:111)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:949)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1912)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1908)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1908)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:491)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:194)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:151)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:126)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:223)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:671)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:412)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1385)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
我的调试器显示 CdiUtils:230 上的 beanManager 为空，我怀疑但无法确认 CdiUtils:213 上的 FacesContext 为空。我怀疑这是由于同时拥有多个容器（Tomcat、CDI、Spring 和 JSF）造成的混淆。我确实喜欢Spring Security、RestTemplate 和JdbcTemplate，所以我有点舍不得Spring。这是我的推豆。我把所有注释都放在上面：
@Component
@Scope("Application")
public class PushBean implements Serializable {
private static final long serialVersionUID = -6558314691176100417L;
@Inject
@Push(channel = "facilitatorBroadcastMessages")
private PushContext push;
private String facilitatorBroadcastMessage;
public void setFacilitatorBroadcastMessage(String message) {
this.facilitatorBroadcastMessage = message;
}
public void broadcastFacilitatorMessage() {
push.send(facilitatorBroadcastMessage);
}
}
发送消息的 Facelet 代码：
<p:button value="Send Broadcast Message to All Users" onclick="PF('broadcastMessageDialog').show(); " />
<p:dialog id="broadcastMessageDialog" header="Facilitator Message" widgetVar="broadcastMessageDialog" height="500px">
<p:inputText id="facilitatorBroadcastMessageInput" value="#{pushBean.facilitatorBroadcastMessage}" />
<p:commandButton onclick="PF('broadcastMessageDialog').hide(); " value="Send" process="@parent" action="#{pushBean.broadcastFacilitatorMessage()}" />
</p:dialog>
JS websocket 侦听器：
function websocketListener(message, channel, event) {
$("#facilitatorBroadcastMessage").innerHTML = message;
PF('facilitatorBroadcastMessageDialog').show();
}
用于显示消息的 JSF websocket 标记和代码：
<f:websocket channel="facilitatorBroadcastMessages" onmessage="webSocketListener" />
<p:dialog id="facilitatorBroadcastMessageDialog" header="Facilitator Message" widgetVar="facilitatorBroadcastMessageDialog" height="500px">
<p id="facilitatorBroadcastMessage"></p>
<p:button onclick="PF('facilitatorBroadcastMessageDialog').hide(); " value="Got it, thanks!"/>
</p:dialog>
有什么解决办法吗？
看看这个http://balusc.omnifaces.org/2013/10/how-to-install-cdi-in-tomcat.html。您需要安装 Weld。
您需要执行以下三个步骤：
- 将 weld-servlet-shaded.jar 放到 webapp 的 /WEB-INF/lib 中。如果您使用 Maven，这是坐标：
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet-shaded</artifactId>
<version>3.0.3.Final</version>
</dependency>
- 在 webapp 的 Web 内容中创建 /META-INF/context.xml 文件，内容如下（或者，如果您已经有一个，只需添加条目）：
<Context>
<Resource name="BeanManager"
auth="Container"
type="javax.enterprise.inject.spi.BeanManager"
factory="org.jboss.weld.resources.ManagerObjectFactory" />
</Context>
这将在 Tomcat 的 JNDI 中注册 Weld 的 BeanManager 工厂。这不能由 Weld 以编程方式执行，因为 Tomcat 的 JNDI 是严格只读的。如果您的目标至少是 Mojarra 2.2.11 and/or OmniFaces 2.4 或更新版本，则无需执行此步骤。两者都能够在 ServletContext 中找到它。但是，可能还有其他库仍希望在 JNDI 中找到 BeanManager，那么您最好为这些库保留此配置文件。
- 创建一个（空）/WEB-INF/beans.xml 文件（不，不在 /META-INF 中！这仅适用于内部 JAR 文件，例如 OmniFaces）。