java - 如何解决此代码中的 javax.naming.NameNotFoundException

Question

我在 netbean 7.3 中用 jboss-7.1.1 Final 创建了一个 Ejb 项目

在 Ejb 模块中我有这些:

LibrarySessionBeanRemote.java

package com.tutorialspoint.stateless;

import java.util.List;
import javax.ejb.Remote;

@Remote
public interface LibrarySessionBeanRemote {
void addBook(String bookName);
List getBooks(); 
}

LibrarySessionBean.java

package com.tutorialspoint.stateless;

import java.util.ArrayList;
import java.util.List;
import javax.ejb.Remote;
import javax.ejb.Stateless;


@Stateless
@Remote(LibrarySessionBeanRemote.class)
public class LibrarySessionBean implements LibrarySessionBeanRemote {

List<String> bookSelf;    

public LibrarySessionBean() {
this.bookSelf = new ArrayList<String>();
}

@Override
public void addBook(String bookName) {
bookSelf.add(bookName);
}

@Override
public List getBooks() {
return bookSelf;
}
}

我做了一个java应用程序项目类型的客户端

package client;

import com.tutorialspoint.stateless.LibrarySessionBeanRemote;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;


public class EJBTester {

BufferedReader brConsoleReader = null;
Properties props;
InitialContext ctx;
{
    props = new Properties();
        props.put(Context.SECURITY_PRINCIPAL, "testuser");
        props.put(Context.SECURITY_CREDENTIALS, "test");
        props.put(Context.PROVIDER_URL, "remote://localhost:4447");
        props.put("jboss.naming.client.ejb.context", true);
        props.put(Context.INITIAL_CONTEXT_FACTORY,   org.jboss.naming.remote.client.InitialContextFactory.class.getName());
    try {
        ctx = new InitialContext(props);
    } catch (NamingException ex) {

        ex.printStackTrace();
    }
    brConsoleReader =
            new BufferedReader(new InputStreamReader(System.in));
}

public static void main(String[] args) {

    EJBTester ejbTester = new EJBTester();

    ejbTester.testStatelessEjb();
}

private void showGUI() {
    System.out.println("**********************");
    System.out.println("Welcome to Book Store");
    System.out.println("**********************");
    System.out.print("Options \n1. Add Book\n2. Exit \nEnter Choice: ");
}

private void testStatelessEjb() {
    try {
        int choice = 1;

        LibrarySessionBeanRemote libraryBean =
                (LibrarySessionBeanRemote) ctx.lookup("LibrarySessionBean/remote");

        while (choice != 2) {
            String bookName;
            showGUI();
            String strChoice = brConsoleReader.readLine();
            choice = Integer.parseInt(strChoice);
            if (choice == 1) {
                System.out.print("Enter book name: ");
                bookName = brConsoleReader.readLine();
                libraryBean.addBook(bookName);
            } else if (choice == 2) {
                break;
            }
        }
        List<String> booksList = libraryBean.getBooks();
        System.out.println("Book(s) entered so far: " + booksList.size());
        for (int i = 0; i < booksList.size(); ++i) {
            System.out.println((i + 1) + ". " + booksList.get(i));
        }
        LibrarySessionBeanRemote libraryBean1 =
                (LibrarySessionBeanRemote) ctx.lookup("LibrarySessionBean/remote");
        List<String> booksList1 = libraryBean1.getBooks();
        System.out.println(
                "***Using second lookup to get library stateless object***");
        System.out.println(
                "Book(s) entered so far: " + booksList1.size());
        for (int i = 0; i < booksList1.size(); ++i) {
            System.out.println((i + 1) + ". " + booksList1.get(i));
        }
    } catch (Exception e) {
        System.out.println(e.getMessage());
        e.printStackTrace();
    } finally {
        try {
            if (brConsoleReader != null) {
                brConsoleReader.close();
            }
        } catch (IOException ex) {
            System.out.println(ex.getMessage());
        }
    }
}
}

但我有这个异常(exception)

javax.naming.NameNotFoundException: LibrarySessionBean/remote -- service jboss.naming.context.java.jboss.exported.LibrarySessionBean.remote
    at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:97)
    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:178)
    at org.jboss.naming.remote.protocol.v1.Protocol$1.handleServerMessage(Protocol.java:127)
    at org.jboss.naming.remote.protocol.v1.RemoteNamingServerV1$MessageReciever$1.run(RemoteNamingServerV1.java:73)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

Answer 1

调用 EJB 时，不应使用远程命名项目，而应使用 https://docs.jboss.org/author/display/AS71/EJB+invocations+from+a+remote+client+using+JNDI 中所述的远程 EJB 调用。

您的 JNDI 名称将如下所示:

context.lookup("ejb:" + appName + "/" + moduleName + "/" + distinctName + "/" + beanName + "!" + viewClassName)

appName 和 distinctName 在您的案例中为空(无 EAR)。请参阅提供的链接中的示例。