jsf - org.omnifaces.VetoAnnotatedTypeExtension.processAnnotatedType(@Observes ProcessAnnotatedType) 接收所有注释类型的事件

Question

我在启动 Wildfly 时收到以下警告:

WELD-000411: Observer method [BackedAnnotatedMethod] public org.omnifaces.VetoAnnotatedTypeExtension.processAnnotatedType(@Observes ProcessAnnotatedType) receives events for all annotated types. Consider restricting events using @WithAnnotations or a generic type with bounds.

知道是什么原因造成的吗？这是启动日志:

F:\wildfly-8.1.0.CR2\bin\standalone.bat
[2014-05-30 08:31:55,733] Artifact Enterp:war exploded: Server is not connected. Deploy is not available.
Detected server admin port: 9990
Detected server http port: 8080
Calling "F:\wildfly-8.1.0.CR2\bin\standalone.conf.bat"
"JAVA_OPTS already set in environment; overriding default settings with values: -Xdebug -Xrunjdwp:transport=dt_socket,address=127.0.0.1:50542,suspend=y,server=n "
Setting JAVA property to "F:\Java\jdk1.8.0_05\bin\java"
===============================================================================

  JBoss Bootstrap Environment

  JBOSS_HOME: "F:\wildfly-8.1.0.CR2"

  JAVA: "F:\Java\jdk1.8.0_05\bin\java"

  JAVA_OPTS: "-Dprogram.name=standalone.bat -Xdebug -Xrunjdwp:transport=dt_socket,address=127.0.0.1:50542,suspend=y,server=n "

===============================================================================

Connected to the target VM, address: '127.0.0.1:50542', transport: 'socket'
20:31:56,715 INFO  [org.jboss.modules] (main) JBoss Modules version 1.3.3.Final
20:31:57,133 INFO  [org.jboss.msc] (main) JBoss MSC version 1.2.2.Final
20:31:57,281 INFO  [org.jboss.as] (MSC service thread 1-6) JBAS015899: WildFly 8.1.0.CR2 "Kenny" starting
20:31:59,625 INFO  [org.jboss.as.server] (Controller Boot Thread) JBAS015888: Creating http management service using socket-binding (management-http)
20:31:59,661 INFO  [org.xnio] (MSC service thread 1-5) XNIO version 3.2.2.Final
20:31:59,678 INFO  [org.xnio.nio] (MSC service thread 1-5) XNIO NIO Implementation Version 3.2.2.Final
20:31:59,769 INFO  [org.jboss.remoting] (MSC service thread 1-5) JBoss Remoting version 4.0.3.Final
20:31:59,804 INFO  [org.jboss.as.security] (ServerService Thread Pool -- 45) JBAS013171: Activating Security Subsystem
20:31:59,839 INFO  [org.jboss.as.jsf] (ServerService Thread Pool -- 38) JBAS012615: Activated the following JSF Implementations: [main]
20:31:59,848 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017502: Undertow 1.0.10.Final starting
20:31:59,867 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-6) JBAS017502: Undertow 1.0.10.Final starting
20:31:59,869 INFO  [org.jboss.as.webservices] (ServerService Thread Pool -- 48) JBAS015537: Activating WebServices Extension
20:31:59,889 INFO  [org.jboss.as.naming] (ServerService Thread Pool -- 40) JBAS011800: Activating Naming Subsystem
20:31:59,926 INFO  [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 32) JBAS010280: Activating Infinispan subsystem.
20:31:59,916 INFO  [org.jboss.as.security] (MSC service thread 1-3) JBAS013170: Current PicketBox version=4.0.21.Beta1
20:32:00,031 INFO  [org.jboss.as.connector.logging] (MSC service thread 1-6) JBAS010408: Starting JCA Subsystem (IronJacamar 1.1.5.Final)
20:32:00,156 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 27) JBAS010403: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3)
20:32:00,248 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-6) JBAS010417: Started Driver service with driver-name = h2
20:32:00,284 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 27) JBAS010404: Deploying non-JDBC-compliant driver class org.postgresql.Driver (version 9.1)
20:32:00,289 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-8) JBAS010417: Started Driver service with driver-name = postgresql
20:32:00,294 INFO  [org.jboss.as.naming] (MSC service thread 1-6) JBAS011802: Starting Naming Service
20:32:00,332 INFO  [org.jboss.as.mail.extension] (MSC service thread 1-6) JBAS015400: Bound mail session [java:/Mail]
20:32:00,675 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017527: Creating file handler for path F:\wildfly-8.1.0.CR2/welcome-content
20:32:00,750 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-6) JBAS017525: Started server default-server.
20:32:00,796 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-6) JBAS017531: Host default-host starting
20:32:01,322 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-3) JBAS017519: Undertow HTTP listener default listening on /127.0.0.1:8080
20:32:01,669 INFO  [org.jboss.as.server.deployment.scanner] (MSC service thread 1-5) JBAS015012: Started FileSystemDeploymentService for directory F:\wildfly-8.1.0.CR2\standalone\deployments
20:32:01,925 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-8) JBAS010400: Bound data source [java:jboss/datasources/ExampleDS]
20:32:01,946 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-4) JBAS010400: Bound data source [java:jboss/datasources/PostgresDatabaseDS]
20:32:02,025 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-6) JBAS017519: Undertow HTTPS listener default-https listening on /127.0.0.1:8443
20:32:02,630 INFO  [org.jboss.ws.common.management] (MSC service thread 1-6) JBWS022052: Starting JBoss Web Services - Stack CXF Server 4.2.4.Final
20:32:02,921 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015961: Http management interface listening on http://127.0.0.1:9990/management
20:32:03,063 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015951: Admin console listening on http://127.0.0.1:9990
20:32:03,065 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015874: WildFly 8.1.0.CR2 "Kenny" started in 6726ms - Started 195 of 245 services (83 services are lazy, passive or on-demand)
Connected to server
[2014-05-30 08:32:03,410] Artifact Enterp:war exploded: Artifact is being deployed, please wait...
20:32:03,699 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-5) JBAS015876: Starting deployment of "Enterp.war" (runtime-name: "Enterp.war")
20:32:04,946 INFO  [org.jboss.as.jpa] (MSC service thread 1-8) JBAS011401: Read persistence.xml for primary
20:32:05,325 INFO  [org.jboss.as.jpa] (ServerService Thread Pool -- 11) JBAS011409: Starting Persistence Unit (phase 1 of 2) Service 'Enterp.war#primary'
20:32:05,344 INFO  [org.hibernate.jpa.internal.util.LogHelper] (ServerService Thread Pool -- 11) HHH000204: Processing PersistenceUnitInfo [
    name: primary
    ...]
20:32:05,463 INFO  [org.hibernate.Version] (ServerService Thread Pool -- 11) HHH000412: Hibernate Core {4.3.5.Final}
20:32:05,466 INFO  [org.hibernate.cfg.Environment] (ServerService Thread Pool -- 11) HHH000206: hibernate.properties not found
20:32:05,469 INFO  [org.hibernate.cfg.Environment] (ServerService Thread Pool -- 11) HHH000021: Bytecode provider name : javassist
20:32:07,308 INFO  [org.jboss.weld.deployer] (MSC service thread 1-8) JBAS016002: Processing weld deployment Enterp.war
20:32:07,404 INFO  [org.hibernate.validator.internal.util.Version] (MSC service thread 1-8) HV000001: Hibernate Validator 5.1.0.Final
20:32:08,772 INFO  [org.jboss.weld.deployer] (MSC service thread 1-8) JBAS016005: Starting Services for CDI deployment: Enterp.war
20:32:08,821 INFO  [org.jboss.weld.Version] (MSC service thread 1-8) WELD-000900: 2.1.2 (Final)
20:32:09,433 INFO  [org.jboss.weld.deployer] (MSC service thread 1-6) JBAS016008: Starting weld service for deployment Enterp.war
20:32:09,697 INFO  [org.jboss.as.jpa] (ServerService Thread Pool -- 11) JBAS011409: Starting Persistence Unit (phase 2 of 2) Service 'Enterp.war#primary'
20:32:09,837 INFO  [org.hibernate.annotations.common.Version] (ServerService Thread Pool -- 11) HCANN000001: Hibernate Commons Annotations {4.0.4.Final}
20:32:10,150 INFO  [org.hibernate.dialect.Dialect] (ServerService Thread Pool -- 11) HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL9Dialect
20:32:10,168 INFO  [org.hibernate.engine.jdbc.internal.LobCreatorBuilder] (ServerService Thread Pool -- 11) HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException
20:32:10,564 INFO  [org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory] (ServerService Thread Pool -- 11) HHH000397: Using ASTQueryTranslatorFactory
20:32:12,346 WARN  [org.jboss.weld.Event] (MSC service thread 1-6) WELD-000411: Observer method [BackedAnnotatedMethod] public org.omnifaces.VetoAnnotatedTypeExtension.processAnnotatedType(@Observes ProcessAnnotatedType<Object>) receives events for all annotated types. Consider restricting events using @WithAnnotations or a generic type with bounds.

Answer 1

默认情况下，支持 CDI 的容器会尝试在 /WEB-INF/lib 中的 JAR 中注册每个类。作为 CDI 托管 bean。在旧版 Java EE 6 容器使用的旧 CDI 版本中，存在错误，CDI 实现甚至会尝试注册枚举、抽象类和/或没有默认构造函数的类，从而导致部署异常 (WebLogic)、运行时异常 (WebSphere)和/或大量令人困惑的警告 (GlassFish/TomEE)。

为了解决这个问题，OmniFaces 添加了一个 VetoAnnotatedTypeExtension 这应该“否决”来自 org.omnifaces 的任何类(class)org.omnifaces.cdi 中不 的包或 org.omnifaces.showcase子包被注册为 CDI 托管 bean。这是通过 ProcessAnnotatedType#veto() 发生的.

在 WildFly 中使用的 Weld 2.x 中，当您使用 ProcessAnnotatedType 时，显然会出现一种新型警告。在所有类(class)中。但是，在这种特定情况下，扫描每个类只是整个目的，因为需要排除在注册为 CDI 托管 bean 之外的类显然没有明确注册为 CDI 托管 bean(否则您可以使用更具体的 T 或 @WithAnnotations，如警告消息中所建议)。

理论上，在这种特定情况下的解决方案是使用 <weld:include>或 <weld:exclude>在beans.xml而不是 Extension .但是，这不是标准的 CDI 解决方案，因为它是特定于 Weld 的，因此不能与其他 CDI 实现一起使用，例如 OpenWebBeans 或 CanDI。我们无法为其他 CDI 实现找到类似的机制，所以我们选择了 Extension。 .毕竟，这“只是”一个警告，而不是错误。一切都应该继续按预期工作。