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如下所示

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。 我已经尝试并测试过这个设置。

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);
    }

}

然后我收到了这个错误

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添加了用户。

成功握手消息传来。

Answer 3

您可能需要将jboss-client.jar和jboss-ejb3-common-client.jar添加到您的库中

Answer 4

您需要依赖项：

<dependency>
    <groupId>org.jboss</groupId>
    <artifactId>jboss-remote-naming</artifactId>
</dependency>

https://mvnrepository.com/artifact/org.jboss/jboss-remote-naming/

对于WildFly，您可以使用org.wildfly.naming.client.WildFlyInitialContextFactory形式：

<dependency>
    <groupId>org.wildfly</groupId>
    <artifactId>wildfly-naming-client</artifactId>
</dependency>

https://mvnrepository.com/artifact/org.wildfly/wildfly-naming-client

您可以使用bom文件进行导入：

<dependency>
    <groupId>org.wildfly</groupId>
    <artifactId>wildfly-ejb-client-bom</artifactId>
    <type>pom</type>
</dependency>

https://mvnrepository.com/artifact/org.wildfly/wildfly-ejb-client-bom