本地主机上的服务器TOMCAT v8.0服务器无法启动- JSF、CDI、JAVA、Tomcat、ECLIPSE
本地主机上的服务器TOMCAT v8.0服务器无法启动- JSF、CDI、JAVA、Tomcat、ECLIPSE
提问于 2018-08-10 21:27:41
下午好，我有一个关于Tomcat和CDI的集成问题。我在stackoverflow和许多其他网站上读了很多帖子。
这里是my bean
package org.servidor.beans;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.enterprise.context.SessionScoped;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.inject.Named;
import javax.servlet.http.HttpServletRequest;
import org.servidor.modelo.Jugador;
@Named
@SessionScoped
public class JugadoresController implements Serializable {
/* Identificador serial UID de la clase serializable */
private static final long serialVersionUID = 1L;
/* Lista de jugadores conectados */
public List<Jugador> lista = new ArrayList<>();
public List<Jugador> getLista() {
return lista;
}
public void setLista(List<Jugador> lista) {
this.lista = lista;
}
/* Metodos de uso en la vista */
public int getNumeroJugadores() {
return this.lista.size();
}
public void eliminarTodosJugadores() {
lista.clear();
}
public void eliminarJugador(Jugador jug) {
Jugador jug_eliminar = null;
for (Jugador juga : lista) {
if (juga.getNick().equals(jug.getNick())) {
jug_eliminar = juga;
}
}
lista.remove(jug_eliminar);
}
public void jugadorEditado(Jugador jug) {
editaJugador(jug);
}
public void modificarCancelado() {
recargaPagina();
}
public void editaJugador(Jugador jugador) {
for (Jugador jug : lista) {
if (jug.getNick().equals(jugador.getNick())) {
jug.setGrupo(jugador.getGrupo());
jug.setPartida(jugador.getPartida());
}
}
}
public void recargaPagina() {
try {
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
ec.redirect(((HttpServletRequest) ec.getRequest()).getRequestURI());
} catch (IOException e) {
e.printStackTrace();
}
}
public void simularAccesoJugador() {
// Creamos un jugador de forma aleatoria
Jugador jugador = new Jugador();
// Datos
int grupo = (int) Math.floor(Math.random() * (10 - (1 + 1)) + (1));
int partida = (int) Math.floor(Math.random() * (20 - (11 + 1)) + (11));
int nick = (int) Math.floor(Math.random() * (50 - (1 + 1)) + (1));
jugador.setGrupo(grupo);
jugador.setPartida(partida);
jugador.setNick("Alberto_" + nick);
lista.add(jugador);
}
}下面是我的配置：
Pom.xml依赖项：
<dependencies>
<!-- Dependencias para implementar JSF 2.2 -->
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-impl</artifactId>
<version>2.2.16</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-catalina</artifactId>
<version>8.0.32</version>
</dependency>
<!-- Dependencias para implementar PrimeFaces 6.2 -->
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>6.2</version>
</dependency>
<!-- For CDI -->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet-shaded</artifactId>
<version>3.0.3.Final</version>
</dependency>
</dependencies>Context.xml位于META-INF/:
<Context>
<Resource name="BeanManager"
auth="Container"
type="javax.enterprise.inject.spi.BeanManager"
factory="org.jboss.weld.resources.ManagerObjectFactory" />
</Context>WEB-INF/:上的Web.xml
<welcome-file-list>
<welcome-file>index.xhtml</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<resource-env-ref>
<!-- Enable Weld CDI, also needs META-INF/context.xml entry -->
<resource-env-ref-name>BeanManager</resource-env-ref-name>
<resource-env-ref-type>javax.enterprise.inject.spi.BeanManager</resource-env-ref-type>
</resource-env-ref>WEB-INF/:上的beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
bean-discovery-mode="annotated">
</beans>Tomcat版本：
Server version: Apache Tomcat/8.0.32 (Ubuntu)Tomcat可以正常工作，但如果我将依赖项添加到我的pom.xml：
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet-shaded</artifactId>
<version>3.0.3.Final</version>
</dependency>或
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet</artifactId>
<version>2.4.4.Final</version>
</dependency>当我运行我的应用程序时，我得到以下错误：
Server Tomcat v8.0 Server at localhost failed to start.如果我显示控制台日志：
INFO: WELD-ENV-001008: Initialize Weld using ServletContainerInitializer
ago 10, 2018 7:53:01 PM org.jboss.weld.bootstrap.WeldStartup <clinit>
INFO: WELD-000900: 3.0.3 (Final)
ago 10, 2018 7:53:01 PM org.jboss.weld.environment.deployment.discovery.ReflectionDiscoveryStrategy processAnnotatedDiscovery
INFO: WELD-ENV-000014: Falling back to Java Reflection for bean-discovery-mode="annotated" discovery. Add org.jboss:jandex to the classpath to speed-up startup.
ago 10, 2018 7:53:01 PM org.jboss.weld.bootstrap.WeldStartup startContainer
INFO: WELD-000101: Transactional services not available. Injection of @Inject UserTransaction not available. Transactional observers will be invoked synchronously.
ago 10, 2018 7:53:01 PM org.jboss.weld.bootstrap.events.BeforeBeanDiscoveryImpl addAnnotatedType
WARN: WELD-000146: BeforeBeanDiscovery.addAnnotatedType(AnnotatedType<?>) used for class com.sun.faces.flow.FlowDiscoveryCDIHelper is deprecated from CDI 1.1!
ago 10, 2018 7:53:01 PM org.jboss.weld.environment.tomcat.TomcatContainer initialize
INFO: WELD-ENV-001100: Tomcat 7+ detected, CDI injection will be available in Servlets, Filters and Listeners.
ago 10, 2018 7:53:01 PM org.apache.catalina.core.ContainerBase startInternal也许，这是关键：
GRAVE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servidor-websocket]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servidor-websocket]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
... 6 more
Caused by: org.jboss.weld.exceptions.DefinitionException: WELD-000075: Normal scoped managed bean implementation class has a public field: [EnhancedAnnotatedFieldImpl] public org.servidor.beans.JugadoresController.lista
at org.jboss.weld.bean.ManagedBean.checkBeanImplementation(ManagedBean.java:231)
at org.jboss.weld.bean.AbstractClassBean.internalInitialize(AbstractClassBean.java:74)
at org.jboss.weld.bean.ManagedBean.internalInitialize(ManagedBean.java:105)
at org.jboss.weld.bean.RIBean.initialize(RIBean.java:69)
at org.jboss.weld.bootstrap.ConcurrentBeanDeployer$4.doWork(ConcurrentBeanDeployer.java:96)
at org.jboss.weld.bootstrap.ConcurrentBeanDeployer$4.doWork(ConcurrentBeanDeployer.java:93)
at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:62)
at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:55)
... 4 more但是如果我删除weld-servlet依赖项，很明显CDI就不能工作了。
我真的很绝望，我不知道为什么会这样。
请帮帮忙。太感谢了。
*已解析*
问题是我在JugadoresController.java中的变量'lista‘的类型，它必须是私有。
此外，项目中的所有类都必须实现Serializable。
非常感谢@Kukeltje和@ACV更正了我的报告，最重要的是感谢@bdkosher给我提供了解决方案。
回答 2
Stack Overflow用户
回答已采纳
发布于 2018-08-11 02:56:55
堆栈跟踪显示了问题
Caused by: org.jboss.weld.exceptions.DefinitionException: WELD-000075: Normal scoped managed bean implementation class has a public field: [EnhancedAnnotatedFieldImpl] public org.servidor.beans.JugadoresController.lista
at org.jboss.weld.bean.ManagedBean.checkBeanImplementation(ManagedBean.java:231)您需要将JugadoresController更改为
private List<Jugador> lista;Stack Overflow用户
发布于 2018-08-11 03:43:53
虽然，主要的问题仍然存在，我读了其他关于问题的帖子，但没有办法。
我正尝试在JSF Bean中实现WebSocket ServerEndPoint，但是当我使用CDI将bean注入到我的服务器中时，我得到了NullPointerException。
这是my ServerEndPoint
package org.servidor.beans;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.enterprise.context.SessionScoped;
import javax.inject.Inject;
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
@ServerEndpoint("/websocket")
@SessionScoped
public class WebsocketController implements Serializable {
private static final long serialVersionUID = 1L;
static final List<Session> conexiones = new ArrayList<>();
@Inject
private JugadoresController jugadorController;
@OnOpen
public void iniciaSesion(Session session) {
conexiones.add(session);
jugadorController.getNumeroJugadores();
}
@OnMessage
public void onMessage(String mensaje, Session sesion) {
System.out.println("Mensaje recibido: " + mensaje);
}
@OnClose
public void finConexion(Session session) {
try {
session.close(); // se cierra la conexión
conexiones.remove(session); // se retira de la lista
} catch (IOException ex) {
}
System.out.println("Conexion cerrada.");
}
}这是my bean
package org.servidor.beans;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.enterprise.context.SessionScoped;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.inject.Named;
import javax.servlet.http.HttpServletRequest;
import org.servidor.modelo.Jugador;
@Named
@SessionScoped
public class JugadoresController implements Serializable {
/* Identificador serial UID de la clase serializable */
private static final long serialVersionUID = 1L;
/* Lista de jugadores conectados */
private List<Jugador> lista = new ArrayList<>();
public List<Jugador> getLista() {
return lista;
}
public void setLista(List<Jugador> lista) {
this.lista = lista;
}
/* Metodos de uso en la vista */
public int getNumeroJugadores() {
return this.lista.size();
}
public void eliminarTodosJugadores() {
lista.clear();
}
public void eliminarJugador(Jugador jug) {
Jugador jug_eliminar = null;
for (Jugador juga : lista) {
if (juga.getNick().equals(jug.getNick())) {
jug_eliminar = juga;
}
}
lista.remove(jug_eliminar);
}
public void jugadorEditado(Jugador jug) {
editaJugador(jug);
}
public void modificarCancelado() {
recargaPagina();
}
public void editaJugador(Jugador jugador) {
for (Jugador jug : lista) {
if (jug.getNick().equals(jugador.getNick())) {
jug.setGrupo(jugador.getGrupo());
jug.setPartida(jugador.getPartida());
}
}
}
public void recargaPagina() {
try {
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
ec.redirect(((HttpServletRequest) ec.getRequest()).getRequestURI());
} catch (IOException e) {
e.printStackTrace();
}
}
public void simularAccesoJugador() {
// Creamos un jugador de forma aleatoria
Jugador jugador = new Jugador();
// Datos
int grupo = (int) Math.floor(Math.random() * (10 - (1 + 1)) + (1));
int partida = (int) Math.floor(Math.random() * (20 - (11 + 1)) + (11));
int nick = (int) Math.floor(Math.random() * (50 - (1 + 1)) + (1));
jugador.setGrupo(grupo);
jugador.setPartida(partida);
jugador.setNick("Alberto_" + nick);
lista.add(jugador);
}
}下面是跟踪信息：
GRAVE: No error handling configured for [org.servidor.beans.WebsocketController] and the following error occurred
java.lang.NullPointerException
at org.servidor.beans.WebsocketController.iniciaSesion(WebsocketController.java:29)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.websocket.pojo.PojoEndpointBase.doOnOpen(PojoEndpointBase.java:66)
at org.apache.tomcat.websocket.pojo.PojoEndpointServer.onOpen(PojoEndpointServer.java:70)
at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:128)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:705)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
ago 10, 2018 9:36:25 PM org.apache.tomcat.websocket.pojo.PojoEndpointBase onError有什么建议吗？我会很棒的。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51787642
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