JNDI"无法实例化类:org.jboss.naming.remote.client.InitialContextFactory"

Question

我正在使用JBoss Server for EJB我需要在控制台应用程序中使用JNDI来获取会话bean的引用,控制台应用程序代码看起来像这样

import java.util.Properties;

import javax.naming.InitialContext;
import javax.naming.NamingException;


public class Program {

    public static void main(String[] args) throws NamingException {
        // TODO Auto-generated method stub
        Properties pr = new Properties();
        pr.put(InitialContext.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
        pr.put(InitialContext.PROVIDER_URL,"remote://localhost:4447");
        InitialContext ic = new InitialContext(pr);

    }

}

当我运行应用程序时,我得到了异常

Exception in thread "main" javax.naming.NoInitialContextException: Cannot instantiate class: org.jboss.naming.remote.client.InitialContextFactory [Root exception is java.lang.ClassNotFoundException: org.jboss.naming.remote.client.InitialContextFactory]
    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.init(Unknown Source)
    at javax.naming.InitialContext.<init>(Unknown Source)
    at Program.main(Program.java:14)
Caused by: java.lang.ClassNotFoundException: org.jboss.naming.remote.client.InitialContextFactory
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at com.sun.naming.internal.VersionHelper12.loadClass(Unknown Source)
    ... 5 more

Answer 1

要克服上述错误,您需要注意两点.
首先,您需要在classpath中使用jboss-client.jar. 其次,根据您使用的Jboss版本,您需要更改您的提供商网址.

对于JBossAS 5,您应该在环境中设置以下属性

env.put(Context.INITIAL_CONTEXT_FACTORY,"org.jboss.naming.NamingContextFactory");
env.put(Context.URL_PKG_PREFIXES,"org.jboss.naming:org.jnp.interfaces");
env.put(Context.PROVIDER_URL, "jnp://127.0.0.1:1099");

对于JBossAS 7,您应该在环境中设置以下属性

env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
env.put(Context.PROVIDER_URL, System.getProperty(Context.PROVIDER_URL, "remote://localhost:4447"));
env.put(Context.SECURITY_PRINCIPAL, System.getProperty("username", DEFAULT_USERNAME));
env.put(Context.SECURITY_CREDENTIALS, System.getProperty("password", DEFAULT_PASSWORD));

Answer 2

您可以使用以下上下文进行连接。我已经尝试并测试了这个设置。

import java.util.Properties;
import javax.naming.Context;
import javax.naming.NamingException;


public class Program {

    public static void main(String[] args) throws NamingException {
      Properties jndiProps = new Properties();
    jndiProps.put(Context.INITIAL_CONTEXT_FACTORY,         
    "org.jboss.naming.remote.client.InitialContextFactory");
    jndiProps.put(Context.PROVIDER_URL,"remote://localhost:4447");
    jndiProps.put(Context.SECURITY_PRINCIPAL, "testuser");
    jndiProps.put(Context.SECURITY_CREDENTIALS, "testpassword");
    jndiProps.put("jboss.naming.client.ejb.context", true);
    Context ctx = new InitialContext(jndiProps);
    }

}

然后我得到了这个错误

JBREM000200: Remote connection failed: javax.security.sasl.SaslException: 
Authentication failed: all available authentication mechanisms failed - Could 
not register a EJB receiver for connection to remote://localhost:4447  
java.lang.RuntimeException: javax.security.sasl.SaslException: Authentication 
failed: all available authentication mechanisms failed.

然后我使用 add-user.sh 添加用户。

握手成功消息传来。