我已根据此快速入门指南 http://hotswapagent.org/mydoc_quickstart-jdk11.html安装了热插拔代理
在服务器 Wildfly 上运行 JSF。具有多个模块的 Webapp。
我注意到当我将一个字段添加到像 LoginBean hotswap 这样的 bean 时会检测到它并重新加载，但是当我尝试在 .xhtml 页面中使用新字段时，它会显示“没有该属性”。
豆变：
public class LoginBean extends BasePage{
private LoginManager loginManager;
private int countLogins; // Added during runtime
@PostConstruct
public void init(){
try{
this.countLogins = loginManager.getAll().size(); // Added during runtime
System.out.println(" countLogins " + getCountLogins()); // Added during runtime
}catch(Exception e){
e.printStackTrace();
}
}
// Added during runtime
public int getCountLogins() {
return countLogins;
}
// Added during runtime
public void setCountLogins(int countLogins) {
this.countLogins = countLogins;
}
public LoginManager getLoginManager() {
return loginManager;
}
public void setLoginManager(LoginManager loginManager) {
this.loginManager = loginManager;
}
}
.xhtml 改动：
logins : #{loginBean.countLogins} <br />
错误：
13:35:32,717 SEVERE [org.primefaces.application.exceptionhandler.PrimeExceptionHandler] (default task-1) /index.xhtml: The class 'com.paem.baseproj.web.user.LoginBean' does not have the property 'countLogins'.: javax.el.ELException: /index.xhtml: The class 'com.paem.baseproj.web.user.LoginBean' does not have the property 'countLogins'.
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:47)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:41)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:169)
at javax.faces.api@3.0.0.SP04//javax.faces.component.UIComponent.encodeAll(UIComponent.java:1650)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:468)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:170)
at javax.faces.api@3.0.0.SP04//javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:132)
at javax.faces.api@3.0.0.SP04//javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:132)
at javax.faces.api@3.0.0.SP04//javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:132)
at deployment.BaseProjectWeb-1.0.war//org.omnifaces.viewhandler.OmniViewHandler.renderView(OmniViewHandler.java:151)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:102)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.lifecycle.Phase.doPhase(Phase.java:76)
at com.sun.jsf-impl@2.3.14.SP04//com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:199)
at javax.faces.api@3.0.0.SP04//javax.faces.webapp.FacesServlet.executeLifecyle(FacesServlet.java:708)
at javax.faces.api@3.0.0.SP04//javax.faces.webapp.FacesServlet.service(FacesServlet.java:451)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at io.opentracing.contrib.opentracing-jaxrs2//io.opentracing.contrib.jaxrs2.server.SpanFinishingFilter.doFilter(SpanFinishingFilter.java:52)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.core@2.2.8.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.core@2.2.8.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.core@2.2.8.Final//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.core@2.2.8.Final//io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.core@2.2.8.Final//io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.core@2.2.8.Final//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.core@2.2.8.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.core@2.2.8.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
at io.undertow.core@2.2.8.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1535)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1535)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1535)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1535)
at org.wildfly.extension.undertow@24.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1535)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
at io.undertow.servlet@2.2.8.Final//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
at io.undertow.core@2.2.8.Final//io.undertow.server.Connectors.executeRootHandler(Connectors.java:387)
at io.undertow.core@2.2.8.Final//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:841)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
at org.jboss.xnio@3.8.4.Final//org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1280)
at java.base/java.lang.Thread.run(Thread.java:829)
如果我构建和部署 webapp，它就会开始工作。