我正在尝试学习ejb 3，并且在下面无法解决的情况下遇到了一个问题。
我有一个实体（书）来存储与书相关的数据。
我创建了Stateless Bean和Remote接口，并将jar部署在glassfish 4中。
基本应用程序连接到主要方法，在这里我需要使用appclient获取书的详细信息。在这里，我得到一个错误“ javax.ejb.EJBException：java.rmi.MarshalException：”
请查看以下片段以了解更多详细信息。
Book.java：
package bookstore.model;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.CollectionTable;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.NamedQuery;
@Entity
@NamedQuery(name = "findAllBooks", query = "select b from Book b")
public class Book {
@Id
@GeneratedValue
private long id;
@Column(nullable = false)
private String title;
private Float price;
@Column(length = 2000)
private String description;
private String isbn;
private Integer nbOfPage;
private Boolean illustrations;
@ElementCollection(fetch = FetchType.EAGER)
@CollectionTable(name = "tag")
@Column(name = "Value")
private List<String> tags;
public List<String> getTags() {
return tags;
}
public void setTags(List<String> tags) {
this.tags = tags;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getIsbn() {
return isbn;
}
public void setIsbn(String isbn) {
this.isbn = isbn;
}
public Integer getNbOfPage() {
return nbOfPage;
}
public void setNbOfPage(Integer nbOfPage) {
this.nbOfPage = nbOfPage;
}
public Boolean getIllustrations() {
return illustrations;
}
public void setIllustrations(Boolean illustrations) {
this.illustrations = illustrations;
}
}
BookEJBRemote.java：
package bookstore.controller;
import java.util.List;
import javax.ejb.Remote;
import bookstore.model.Book;
@Remote
public interface BookEJBRemote {
public List<Book> findBooks();
public Book findBookById(long id);
public Book createBook(Book book);
public Book deleteBook(Book book);
public Book updateBook(Book book);
}
BookEJB.java：
包bookstore.controller;
import java.util.List;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import bookstore.model.Book;
@Stateless
@LocalBean
public class BookEJB implements BookEJBRemote {
@PersistenceContext(unitName = "bookstore_persistence")
private EntityManager em;
/* (non-Javadoc)
* @see bookstore.controller.BookEJBRemote#findBooks()
*/
public List<Book> findBooks() {
TypedQuery<Book> query = em
.createNamedQuery("findAllBooks", Book.class);
return query.getResultList();
}
/* (non-Javadoc)
* @see bookstore.controller.BookEJBRemote#findBookById(long)
*/
public Book findBookById(long id) {
return em.find(Book.class, id);
}
/* (non-Javadoc)
* @see bookstore.controller.BookEJBRemote#createBook(bookstore.model.Book)
*/
public Book createBook(Book book) {
em.persist(book);
return book;
}
/* (non-Javadoc)
* @see bookstore.controller.BookEJBRemote#deleteBook(bookstore.model.Book)
*/
public Book deleteBook(Book book) {
em.remove(book);
return book;
}
/* (non-Javadoc)
* @see bookstore.controller.BookEJBRemote#updateBook(bookstore.model.Book)
*/
public Book updateBook(Book book) {
return em.merge(book);
}
}
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_2_0.xsd"
version="2.0">
<persistence-unit name="bookstore_persistence"
transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<jta-data-source>jdbc/mysqlPool</jta-data-source>
<class>bookstore.model.Book</class>
<properties>
<property name="eclipselink.target-database" value="MYSQL" />
<property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
<property name="eclipselink.logging-level" value="INFO" />
<!-- property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/testdb" />
<property name="javax.persistence.jdbc.user" value="test_user" />
<property name="javax.persistence.jdbc.password" value="password" /-->
</properties>
</persistence-unit>
</persistence>
pom.xml：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.sambaran</groupId>
<artifactId>bookstore</artifactId>
<version>1.0.1-SNAPSHOT</version>
<name>sample-bookstore</name>
<dependencies>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
</dependency>
<!-- <dependency> <groupId>org.eclipse.persistence</groupId> <artifactId>eclipselink</artifactId>
<scope>runtime</scope> <version>2.6.0</version> </dependency> <dependency>
<groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.35</version>
</dependency> -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.ejb</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.extras</groupId>
<artifactId>glassfish-embedded-all</artifactId>
<version>3.0.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<configuration>
<archive>
<manifest>
<mainClass>bookstore.client.BookStoreMain</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
主类BookstoreMain.java
package bookstore.client;
import java.util.ArrayList;
import javax.ejb.EJB;
import bookstore.controller.BookEJBRemote;
import bookstore.model.Book;
public class BookStoreMain {
@EJB
private static BookEJBRemote bookEJB;
public static void main(String[] args) {
// TODO Auto-generated method stub
Book book = new Book();
book.setTitle("Head First Servlets and JSP");
book.setDescription("A brain friendly guide.");
book.setIllustrations(true);
book.setIsbn("1-3244-3237676");
book.setPrice(new Float(400.00));
book.setNbOfPage(865);
ArrayList<String> tags = new ArrayList<String>();
tags.add("java");
tags.add("J2SE");
book.setTags(tags);
bookEJB.createBook(book);
book.setTitle("Hear First SQL");
bookEJB.updateBook(book);
//bookEJB
}
}
使用asadmin命令成功部署了ejb。请检查以下详细信息。
sambaran@sambaran-home:~/glassfish-4.1/glassfish/bin$ ./asadmin list-applications --type ejb
bookstore-1.0.1-SNAPSHOT <ejb>
Command list-applications executed successfully.
当我尝试使用appclient安装客户端时，出现上述错误。 PFB详细信息。
sambaran@sambaran-home:~/glassfish-4.1/glassfish/bin$ ./appclient -client /home/sambaran/workspace/bookstore/target/bookstore-1.0.1-SNAPSHOT.jar
Exception in thread "main" javax.ejb.EJBException: java.rmi.MarshalException: CORBA MARSHAL 1330446343 No; nested exception is:
org.omg.CORBA.MARSHAL: ----------BEGIN server-side stack trace----------
org.omg.CORBA.MARSHAL: FINE: 00810007: Underflow in BufferManagerReadStream after last fragment in message vmcid: OMG minor code: 7 completed: No
at com.sun.proxy.$Proxy167.endOfStream(Unknown Source)
at com.sun.corba.ee.impl.encoding.BufferManagerReadStream.underflow(BufferManagerReadStream.java:122)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_1.grow(CDRInputStream_1_1.java:111)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_2.alignAndCheck(CDRInputStream_1_2.java:126)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_long(CDRInputStream_1_0.java:433)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readValueTag(CDRInputStream_1_0.java:1672)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:918)
at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value(CDRInputObject.java:518)
at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl$14.read(DynamicMethodMarshallerImpl.java:383)
at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readArguments(DynamicMethodMarshallerImpl.java:450)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:171)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
----------END server-side stack trace---------- vmcid: OMG minor code: 7 completed: No
at bookstore.controller._BookEJBRemote_Wrapper.createBook(bookstore/controller/_BookEJBRemote_Wrapper.java)
at bookstore.client.BookStoreMain.main(BookStoreMain.java:28)
Caused by: java.rmi.MarshalException: CORBA MARSHAL 1330446343 No; nested exception is:
org.omg.CORBA.MARSHAL: ----------BEGIN server-side stack trace----------
org.omg.CORBA.MARSHAL: FINE: 00810007: Underflow in BufferManagerReadStream after last fragment in message vmcid: OMG minor code: 7 completed: No
at com.sun.proxy.$Proxy167.endOfStream(Unknown Source)
at com.sun.corba.ee.impl.encoding.BufferManagerReadStream.underflow(BufferManagerReadStream.java:122)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_1.grow(CDRInputStream_1_1.java:111)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_2.alignAndCheck(CDRInputStream_1_2.java:126)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_long(CDRInputStream_1_0.java:433)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readValueTag(CDRInputStream_1_0.java:1672)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:918)
at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value(CDRInputObject.java:518)
at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl$14.read(DynamicMethodMarshallerImpl.java:383)
at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readArguments(DynamicMethodMarshallerImpl.java:450)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:171)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
----------END server-side stack trace---------- vmcid: OMG minor code: 7 completed: No
at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:266)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:211)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:150)
at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:226)
at bookstore.controller.__BookEJBRemote_Remote_DynamicStub.createBook(bookstore/controller/__BookEJBRemote_Remote_DynamicStub.java)
... 2 more
Caused by: org.omg.CORBA.MARSHAL: ----------BEGIN server-side stack trace----------
org.omg.CORBA.MARSHAL: FINE: 00810007: Underflow in BufferManagerReadStream after last fragment in message vmcid: OMG minor code: 7 completed: No
at com.sun.proxy.$Proxy167.endOfStream(Unknown Source)
at com.sun.corba.ee.impl.encoding.BufferManagerReadStream.underflow(BufferManagerReadStream.java:122)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_1.grow(CDRInputStream_1_1.java:111)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_2.alignAndCheck(CDRInputStream_1_2.java:126)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_long(CDRInputStream_1_0.java:433)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readValueTag(CDRInputStream_1_0.java:1672)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:918)
at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value(CDRInputObject.java:518)
at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl$14.read(DynamicMethodMarshallerImpl.java:383)
at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readArguments(DynamicMethodMarshallerImpl.java:450)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:171)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
----------END server-side stack trace---------- vmcid: OMG minor code: 7 completed: No
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.MessageBase.getSystemException(MessageBase.java:813)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.ReplyMessage_1_2.getSystemException(ReplyMessage_1_2.java:131)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.getSystemExceptionReply(MessageMediatorImpl.java:594)
at com.sun.corba.ee.impl.protocol.ClientRequestDispatcherImpl.processResponse(ClientRequestDispatcherImpl.java:518)
at com.sun.corba.ee.impl.protocol.ClientRequestDispatcherImpl.marshalingComplete(ClientRequestDispatcherImpl.java:392)
at com.sun.corba.ee.impl.protocol.ClientDelegateImpl.invoke(ClientDelegateImpl.java:258)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:198)
... 5 more
最佳答案
看来您的实体类未序列化，请在您的Serializable类中实现Book接口
@Entity
@NamedQuery(name = "findAllBooks", query = "select b from Book b")
public class Book implements Serializable {
@Id
@GeneratedValue
private long id;
...
}
希望会有所帮助。