Access EJB on JBoss from outside

How to acces an enterprise java bean (EJB) running on JBoss from a standalone application running outside JBoss?

1. In the code you must, among others:
   
   
   
   
   
2. Set properties for a naming context and create one to be able to look the EJB up

jboss_jaas { org.jboss.security.ClientLoginModule required; };

<application-policy name = "tap_experiments">
       <authentication>
          <login-module code = "org.jboss.security.ClientLoginModule"  flag = "required"></login-module>
       </authentication>
    </application-policy>

import java.rmi.RemoteException;
import java.util.Properties;

import javax.ejb.CreateException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;

import com.teradata.tap.system.query.ejb.QueryEngineRemote;
import com.teradata.tap.system.query.ejb.QueryEngineRemoteHome;

/** * Call a business method of an EJB running on JBoss */public class ExternalCallEjbSample {

        public static void main(String[] args) {// 1: Get the naming Context// Required JARs (in jboss/server/default/lib): jboss-common.jar, jnpserver.jar 
                Properties props = new Properties();
                //      Matches the java.naming.factory.initial property in jndi.properties
                props.put(Context.INITIAL_CONTEXT_FACTORY,
                                "org.jnp.interfaces.NamingContextFactory");
                //      Matches the java.naming.provider.url property in jndi.properties
                props.put(Context.PROVIDER_URL, "jnp://localhost:1099");
                props.put(Context.URL_PKG_PREFIXES,
                                "org.jboss.naming:org.jnp.interfaces");
                QueryEngineRemoteHome queryEngineHome = null;

                try {

                        Context ctx = new InitialContext(props);

                        /*/ Print all entries in the JNDI                         NamingEnumeration ne = ctx.list("java:");                         while (ne.hasMore()) {                         System.out.println("A: " + ne.next().toString());                         } //*/

                        // Look up and instantiate the home interface of the EJB// IMPORTANT: It fails if no SecurityManager specified for RMI class loader will be disabled// -> add these options to the JVM:// -Djava.security.manager -Djava.security.policy=" home>\server\default\conf\server.policy"
                        String beanName = QueryEngineRemoteHome.JNDI_NAME;
                        System.out.println("Looking up '" + beanName + "'");
                        Object lookup = ctx.lookup(beanName);

                        queryEngineHome = (QueryEngineRemoteHome) PortableRemoteObject
                                        .narrow(lookup, QueryEngineRemoteHome.class);

                } catch (NamingException e) {
                        System.out.println("new InitialContext failed:" + e);
                }

                // 2. Instantiate the (remote) EJB and call its business method(s)// 2.1 I have to authenticate unless security allows anybody to call create on the EJB//      Otherwise an EJBException: checkSecurityAssociation will be thrown.// TODO: JVM option -Djava.security.auth.login.config==sample_jaas.config - use org.jboss.security.ClientLoginModule// and have  home>\server\default\lib\jbosssx.jar on the path (class ClientLoginModule)// Listing of sample_jaas.config://      jboss_jaas { org.jboss.security.ClientLoginModule required debug=true; };
                LoginContext loginContext = null;
                boolean loggedIn = false;
                try {
                        CallbackHandler handler = new MyPresetCallbackHandler("tapdev","tapdev");
                        // jboss_jaas - name of a configuration in the jaas config file 
                        loginContext = new LoginContext("jboss_jaas", handler);
                        System.out.println("Created LoginContext");
                        loginContext.login(); // throws LoginException
                        System.out.println("Logged in.");
                        loggedIn = true;
                } catch (LoginException le) {
                        System.out.println("Login failed");
                        le.printStackTrace();
                }

                // Create & use the EJB:if (loggedIn && queryEngineHome != null) {try {
                                QueryEngineRemote queryEngine = queryEngineHome.create();
                                System.out.println("queryEngine remote created.");
                                // TODO: call business method(s)} catch (RemoteException e1) {
                                e1.printStackTrace();
                        } catch (CreateException e1) {
                                e1.printStackTrace();
                        }}

                // Log outif (loggedIn && loginContext != null) {try {
                                loginContext.logout();
                        } catch (LoginException e) {
                                System.out.println("Logout failed:" + e);
                        }}

                System.out.println("## DONE! ##");
        } // main

        /** Authentication CallbackHandler with preset username/password. */static class MyPresetCallbackHandler implements CallbackHandler {
                String username;

                char[] password;

                public MyPresetCallbackHandler(String username, String password) {this.username = username;
                        this.password = password.toCharArray();
                }

                public void handle(Callback[] callbacks) throws java.io.IOException,
                                UnsupportedCallbackException {for (int i = 0; i < callbacks.length; i++) {
                                Callback callback = callbacks[i];
                                if (callback instanceof NameCallback) {
                                        ((NameCallback) callback).setName(username);
                                } else if (callback instanceof PasswordCallback) {
                                        ((PasswordCallback) callback).setPassword(password);
                                } else {throw new UnsupportedCallbackException(callback,
                                                        "Unrecognized Callback");
                                }}}// handle }// MyPresetCallbackHandler}

See EjbLocator.java and EjbLocatorException.java. With them, you can replace all above with QueryEngineRemote queryEngine = (QueryEngineRemote) EjbLocator.getInstance().locate( QueryEngineRemoteHome.JNDI_NAME );