相关疑难解决方法(0)

PersistenceContext EntityManager注入NullPointerException

我有一场包含以下内容的战争:

META-INF/MANIFEST.MF
WEB-INF/classes/META-INF/persistence.xml
WEB-INF/classes/com/test/service/TestServlet.class
WEB-INF/classes/com/test/service/TestEntity.class
WEB-INF/classes/jndi.properties
WEB-INF/classes/postgresql-ds.xml
WEB-INF/jboss-web.xml
WEB-INF/web.xml
index.jsp
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persistence.xml中:

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">
    <persistence-unit name="test">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>java:/TestDS</jta-data-source>

        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
            <property name="hibernate.hbm2ddl.auto" value="update" />
            <property name="hibernate.show_sql" value="true" />
        </properties>
    </persistence-unit>
</persistence>
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web.xml中:

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Test Web Application</display-name>

    <context-param>
        <param-name>resteasy.scan</param-name>
        <param-value>true</param-value>
    </context-param>
    <listener>
        <listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap</listener-class>
    </listener>
    <servlet>
        <servlet-name>Resteasy</servlet-name>
        <servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Resteasy</servlet-name>
        <url-pattern>/service/*</url-pattern>
    </servlet-mapping>

    <resource-ref>
        <res-ref-name>TestDS</res-ref-name>
        <res-type>javax.sql.DataSource</res-type>
        <res-auth>Container</res-auth>
        <res-sharing-scope>Shareable</res-sharing-scope>
    </resource-ref>
</web-app>
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我的TestServlet类如下:

package com.test.service; …
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java jboss hibernate jpa resteasy

44
推荐指数
1
解决办法
14万
查看次数

为什么EJB是null?

我正在研究休息服务和学习EJB的同时.我只是使用简单的链控制器运行我的应用程序 - >服务 - > DAO并且我的EJB hotelService没有注入 - 它是null.

@Path("/hotels")
public class HotelsController {

@EJB
private HotelService hotelService;


@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getHotelsList(@QueryParam("startDate") String startDate,
                              @QueryParam("endDate") String endDate) {
    List<HotelsEntity> list = hotelService.getAll();
    return ResponseFactory.response(Response.Status.OK, list);
}
}
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服务

@Stateless
@EJB(beanInterface = HotelService.class, name = "HotelService")
public class HotelService {

@EJB
private HotelDAO hotelDAO;

public List<HotelsEntity> getAll() {
    return hotelDAO.getAll();
}

public Hotel getHotelById(final String id) {
    return hotelDAO.getHotelById(id);
}
}
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DAO

@Stateless
public class HotelDAO {

@PersistenceContext(unitName = Constants.PERSISTENCE_UNIT) …
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java ejb ejb-3.1

6
推荐指数
1
解决办法
9641
查看次数

JBoss Wildfly与Jersey Web服务部署错误JBAS011859:命名上下文是只读的

我正在使用Jersey Servlet(1.18.1)处理Java Webservices项目.当我将我的EAR文件部署到Jboss WildFly(8.1.0)时,我得到以下错误,我不确定为什么它在部署和在JBoss7(7.1.1)中100%部署的同一个EAR文件时破坏.
错误堆栈跟踪:

java.lang.UnsupportedOperationException: JBAS011859: Naming context is read-only
at org.jboss.as.naming.WritableServiceBasedNamingStore.requireOwner(WritableServiceBasedNamingStore.java:126)
at org.jboss.as.naming.WritableServiceBasedNamingStore.createSubcontext(WritableServiceBasedNamingStore.java:116)
at org.jboss.as.naming.NamingContext.createSubcontext(NamingContext.java:338)
at org.jboss.as.naming.InitialContext.createSubcontext(InitialContext.java:229)
at org.jboss.as.naming.NamingContext.createSubcontext(NamingContext.java:346)
at javax.naming.InitialContext.createSubcontext(InitialContext.java:464)
at com.sun.jersey.server.impl.cdi.CDIExtension$1.stepInto(CDIExtension.java:280)
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java jboss web-services jersey wildfly

3
推荐指数
1
解决办法
5696
查看次数

@ApplicationScoped Bean被构造多次

我有两个托管Java Bean:

import javax.annotation.PostConstruct;
import javax.faces.bean.ApplicationScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;

import javax.ws.rs.Path;

@Path("/sync")
@ManagedBean(name="syncService", eager=true)
@ApplicationScoped
public class SyncService {
    @ManagedProperty(value="#{ldapDirectoryAccess}")
    private DirectoryAccess directoryAccess;

    public void setDirectoryAccess(DirectoryAccess directoryAccess) {
        System.out.println("SyncService.setDirectoryAccess()");
        this.directoryAccess = directoryAccess;
    }

    public SyncService() {
        System.out.println("SyncService() - constructed: " + this);
    }

    @PostConstruct
    public void init() {
        System.out.println("DirectoryAccess injected: " + directoryAccess + " in: " + this);
    }
    ...
}

@ManagedBean(name="ldapDirectoryAccess", eager=true)
@ApplicationScoped
public class LdapDirectoryAccess implements DirectoryAccess {
    public LdapDirectoryAccess() {
        System.out.println("LdapDirectoryAccess constructed: " + this); …
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jsf dependency-injection managed-bean

1
推荐指数
1
解决办法
576
查看次数