EJB没有被注入JAX-RS
我正在使用JBoss 6.2.0 EAP，我试图将我的EJB注入到我的JAX-RS类中，但是我得到了一个NullPointerEXception。它绝对是CUstomerDAO类，因为第29行的错误是在null对象上调用printOut方法。我在我的WEB-INF中添加了beans.xml。我想知道我添加的servlet，或者我添加的web.xml配置是否给了我一个错误。我在jboss服务器上声明了一个数据源，并且工作正常。这只是我添加的新东西似乎抛出错误。如果有人想要这个项目，我可以把它搞定。
这是我的文件
错误堆栈跟踪
10:11:32,834 INFO [org.jboss.as.server.deployment] (MSC service thread 1-2) JBAS015876: Starting deployment of "mysql-connector-java-5.1.29-bin.jar" (runtime-name: "mysql-connector-java-5.1.29-bin.jar")
10:11:32,835 INFO [org.jboss.as.server.deployment.scanner] (MSC service thread 1-4) JBAS015012: Started FileSystemDeploymentService for directory /opt/jboss-eap-6.2/standalone/deployments
10:11:33,508 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-1) JBAS010404: Deploying non-JDBC-compliant driver class com.mysql.jdbc.Driver (version 5.1)
10:11:33,536 INFO [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-4) JBAS010400: Bound data source [java:/tutorial]
10:11:33,769 INFO [org.jboss.as.server] (Controller Boot Thread) JBAS018559: Deployed "mysql-connector-java-5.1.29-bin.jar" (runtime-name : "mysql-connector-java-5.1.29-bin.jar")
10:11:33,852 INFO [org.jboss.as] (Controller Boot Thread) JBAS015961: Http management interface listening on http://127.0.0.1:9990/management
10:11:33,852 INFO [org.jboss.as] (Controller Boot Thread) JBAS015951: Admin console listening on http://127.0.0.1:9990
10:11:33,853 INFO [org.jboss.as] (Controller Boot Thread) JBAS015874: JBoss EAP 6.2.0.GA (AS 7.3.0.Final-redhat-14) started in 6615ms - Started 160 of 220 services (58 services are passive or on-demand)
10:12:44,006 INFO [org.jboss.as.repository] (HttpManagementService-threads - 2) JBAS014900: Content added at location /opt/jboss-eap-6.2/standalone/data/content/bc/c99f85aabe406819b2f1f6d5c660b3fcb0d231/content
10:12:51,778 INFO [org.jboss.as.server.deployment] (MSC service thread 1-4) JBAS015876: Starting deployment of "webproject.war" (runtime-name: "webproject.war")
10:12:52,031 WARN [org.jboss.weld.deployer] (MSC service thread 1-2) JBAS016010: Warning while parsing vfs:/content/webproject.war/WEB-INF/beans.xml:6 SchemaLocation: schemaLocation value = ' http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd' must have even number of URI's.
10:12:52,103 INFO [org.jboss.as.jpa] (MSC service thread 1-2) JBAS011401: Read persistence.xml for tutorial
10:12:52,239 INFO [org.jboss.weld.deployer] (MSC service thread 1-2) JBAS016002: Processing weld deployment webproject.war
10:12:52,267 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-2) JNDI bindings for session bean named WebProject in deployment unit deployment "webproject.war" are as follows:
java:global/webproject/WebProject!com.example.ejbrest.WebProject
java:app/webproject/WebProject!com.example.ejbrest.WebProject
java:module/WebProject!com.example.ejbrest.WebProject
java:global/webproject/WebProject
java:app/webproject/WebProject
java:module/WebProject
10:12:52,268 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-2) JNDI bindings for session bean named CustomerDAO in deployment unit deployment "webproject.war" are as follows:
java:global/webproject/CustomerDAO!com.example.ejbrest.CustomerDAO
java:app/webproject/CustomerDAO!com.example.ejbrest.CustomerDAO
java:module/CustomerDAO!com.example.ejbrest.CustomerDAO
java:global/webproject/CustomerDAO
java:app/webproject/CustomerDAO
java:module/CustomerDAO
10:12:52,270 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-2) JNDI bindings for session bean named CustomerWS in deployment unit deployment "webproject.war" are as follows:
java:global/webproject/CustomerWS!com.example.ejbrest.CustomerWS
java:app/webproject/CustomerWS!com.example.ejbrest.CustomerWS
java:module/CustomerWS!com.example.ejbrest.CustomerWS
java:global/webproject/CustomerWS
java:app/webproject/CustomerWS
java:module/CustomerWS
10:12:52,514 INFO [org.jboss.weld.deployer] (MSC service thread 1-3) JBAS016005: Starting Services for CDI deployment: webproject.war
10:12:52,598 INFO [org.jboss.weld.Version] (MSC service thread 1-3) WELD-000900 1.1.16 (redhat)
10:12:52,657 INFO [org.jboss.weld.deployer] (MSC service thread 1-1) JBAS016008: Starting weld service for deployment webproject.war
10:12:52,658 INFO [org.jboss.as.jpa] (ServerService Thread Pool -- 48) JBAS011402: Starting Persistence Unit Service 'webproject.war#tutorial'
10:12:52,879 INFO [org.hibernate.annotations.common.Version] (ServerService Thread Pool -- 48) HCANN000001: Hibernate Commons Annotations {4.0.1.Final-redhat-2}
10:12:52,897 INFO [org.hibernate.Version] (ServerService Thread Pool -- 48) HHH000412: Hibernate Core {4.2.7.SP1-redhat-3}
10:12:52,900 INFO [org.hibernate.cfg.Environment] (ServerService Thread Pool -- 48) HHH000206: hibernate.properties not found
10:12:52,912 INFO [org.hibernate.cfg.Environment] (ServerService Thread Pool -- 48) HHH000021: Bytecode provider name : javassist
10:12:52,937 INFO [org.hibernate.ejb.Ejb3Configuration] (ServerService Thread Pool -- 48) HHH000204: Processing PersistenceUnitInfo [
name: tutorial
...]
10:12:53,042 INFO [org.hibernate.service.jdbc.connections.internal.ConnectionProviderInitiator] (ServerService Thread Pool -- 48) HHH000130: Instantiating explicit connection provider: org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider
10:12:53,377 INFO [org.hibernate.dialect.Dialect] (ServerService Thread Pool -- 48) HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
10:12:53,496 INFO [org.hibernate.engine.transaction.internal.TransactionFactoryInitiator] (ServerService Thread Pool -- 48) HHH000268: Transaction strategy: org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory
10:12:53,502 INFO [org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory] (ServerService Thread Pool -- 48) HHH000397: Using ASTQueryTranslatorFactory
10:12:53,563 INFO [org.hibernate.validator.internal.util.Version] (ServerService Thread Pool -- 48) HV000001: Hibernate Validator 4.3.1.Final-redhat-1
10:12:54,400 INFO [org.jboss.web] (ServerService Thread Pool -- 49) JBAS018210: Register web context: /webproject
10:12:54,476 INFO [org.jboss.resteasy.cdi.CdiInjectorFactory] (ServerService Thread Pool -- 49) Found BeanManager at java:comp/BeanManager
10:12:55,057 INFO [org.jboss.as.server] (HttpManagementService-threads - 2) JBAS018559: Deployed "webproject.war" (runtime-name : "webproject.war")
10:13:08,430 INFO [org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher] (http-localhost/127.0.0.1:8080-1) Deploying javax.ws.rs.core.Application: class com.example.ejbrest.RestApplication$Proxy$_$$_WeldClientProxy
10:13:08,441 INFO [org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher] (http-localhost/127.0.0.1:8080-1) Adding singleton resource com.example.ejbrest.CustomerWS from Application javax.ws.rs.core.Application
10:13:08,649 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/webproject].[Resteasy]] (http-localhost/127.0.0.1:8080-1) JBWEB000236: Servlet.service() for servlet Resteasy threw exception: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:365) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:233) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:209) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:557) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]
Caused by: java.lang.NullPointerException
at com.example.ejbrest.CustomerWS.getCustomer(CustomerWS.java:29) [classes:]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_51]
at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_51]
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:167) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:216) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:542) [resteasy-jaxrs-2.3.7.Final-redhat-2.jar:2.3.7.Final-redhat-2]
... 21 more
的web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<display-name>RestEasy sample Web Application</display-name>
<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>
<init-param>
<param-name>javax.ws.rs.Application</param-name>
<param-value>com.example.ejbrest.RestApplication</param-value>
</init-param>
<!-- <load-on-startup>1</load-on-startup>-->
</servlet>
<servlet-mapping>
<servlet-name>Resteasy</servlet-name>
<url-pattern>/customers/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>ControllerServlet</servlet-name>
<servlet-class>com.example.ejbrest.ControllerServlet</servlet-class>
<!-- <load-on-startup>0</load-on-startup>-->
</servlet>
<servlet-mapping>
<servlet-name>ControllerServlet</servlet-name>
<!-- <url-pattern>/tutorial/*</url-pattern>-->
<url-pattern>/application/*</url-pattern>
</servlet-mapping>
</web-app>
的beans.xml
<!-- Marker file indicating CDI should be enabled -->
<beans xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd">
</beans>
<!-- http://java.sun.com/xml/ns/javaee/beans_1_0.xsd"
http://java.sun.com/xml/ns/javaee -->
的persistence.xml ：
<?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="tutorial">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/tutorial</jta-data-source>
<properties>
<property name="hibernate.archive.autodetection" value="class" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.show_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
Java类：
package com.example.ejbrest;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import org.jboss.resteasy.plugins.providers.html.View;
@Path("/customers")
@Stateless
@LocalBean
public class CustomerWS {
@EJB
private CustomerDAO customersDao;
@GET
@Path("/first/{id}")
public Customer getCustomer(@PathParam("id") int id) {
customersDao.printOut();
return customersDao.getCustomer(id);
}
@GET
@Path("/second/{id}")
public View getCustomer() {
System.out.println("Got in here! ! ! ");
View v = new View("/application");
//v.render(arg0, arg1);
//System.out.println("path " + v.getPath());
return v;
}
@POST
public void addCustomers(List<Customer> customers) {
customersDao.addCustomers(customers);
}
}
CustomerDAO：
package com.example.ejbrest;
import java.util.List;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
@LocalBean
public class CustomerDAO {
@PersistenceContext
private EntityManager em;
public Customer getCustomer(int id) {
return em.find(Customer.class, id);
}
public void printOut(){
System.out.println("AGGGGGH!");
}
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public void addCustomers(List<Customer> customers) {
for (Customer customer : customers) {
em.persist(customer);
}
}
}
CustomerWS
package com.example.ejbrest;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import org.jboss.resteasy.plugins.providers.html.View;
@Path("/customers")
@Stateless
@LocalBean
public class CustomerWS {
@EJB
private CustomerDAO customersDao;
@GET
@Path("/first/{id}")
public Customer getCustomer(@PathParam("id") int id) {
customersDao.printOut();
return customersDao.getCustomer(id);
}
@GET
@Path("/second/{id}")
public View getCustomer() {
System.out.println("Got in here! ! ! ");
View v = new View("/application");
//v.render(arg0, arg1);
//System.out.println("path " + v.getPath());
return v;
}
@POST
public void addCustomers(List<Customer> customers) {
customersDao.addCustomers(customers);
}
}
目录结构
2 个答案:
答案 0 :(得分：0)
我看到一些问题，其中一些可能是红色的鲱鱼所以我想我会把它们全部列出来。
请勿在{{1}}中包含所有此重新配置。如果没有别的，它可能会混淆应用服务器。您应该有一个如下所示的JAX-RS应用程序：
web.xml这就是所需要的。从配置中删除resteasy listener和servlet。
您正在使用CDI 1.1 @ApplicationPath("/customers")
public class RestApplication extends Application {
// nothing needed ...
}
。 EAP 6.2符合CDI 1.0标准。将文件设为空或在文件中使用CDI 1.0标记。
你实际上有两个不同的beans.xml类吗？或者是复制粘贴问题？
答案 1 :(得分：0)
首先是您的代码的几个注释：
- 您不需要项目中的beans.xml文件，因为使用不使用CDI注释而只使用EJB3注释
- @LocalBean注释不是必需的，@ Stateless足以定义本地bean，详细解释可以在EJB 3.1 @LocalBean vs no annotation 中找到
- 不需要在web.xml中为resteasy定义监听器，servlet和servlet映射元素，JBoss / RestEasy（JAX-RS实现库）会自动为您添加这些定义。使用root web-app元素的空web.xml就足够了。
现在你的问题： 属性CustomerWS.customersDao不是由EJB容器注入的，因为CustomerWS不是按容器部署为EJB bean，而是仅作为RestEasy的JAX-RS资源。在JBoss EAP 6.x中使用RestEasy 2.x的已知缺点是，restfull资源无法成为开箱即用的EJB bean：https://docs.jboss.org/resteasy/docs/2.3.6.Final/userguide/html/RESTEasy_EJB_Integration.html
您需要做的就是在web.xml中定义特殊的上下文参数，使用逗号分隔的EJB bean的jndi名称，这些名称也是RestEasy管理的restfull资源。因此，在您的情况下，您需要在以下代码段中插入web.xml：
<context-param>
<param-name>resteasy.jndi.resources</param-name>
<param-value>java:module/CustomerWS</param-value>
</context-param>
就是这样。现在，CustomerWS类将作为EJB bean进行处理，并进行注入。
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