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ActiveMQ example source code file (GuestLoginModule.java)

This example ActiveMQ source code file (GuestLoginModule.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

callbackhandler, callbackhandler, guest, guestloginmodule, io, ioexception, loginexception, loginexception, map, password, passwordcallback, passwordcallback, security, string, string, unsupportedcallbackexception, util

The ActiveMQ GuestLoginModule.java source code

 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.activemq.jaas;

import java.io.IOException;
import java.security.Principal;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

 * Always login the user with a default 'guest' identity.
 * Useful for unauthenticated communication channels being used in the
 * same broker as authenticated ones.
public class GuestLoginModule implements LoginModule {

    private static final String GUEST_USER = "org.apache.activemq.jaas.guest.user";
    private static final String GUEST_GROUP = "org.apache.activemq.jaas.guest.group";

    private static final Logger LOG = LoggerFactory.getLogger(GuestLoginModule.class);

    private String userName = "guest";
    private String groupName = "guests";
    private Subject subject;
    private boolean debug;
    private boolean credentialsInvalidate;
    private Set<Principal> principals = new HashSet();
    private CallbackHandler callbackHandler;
    private boolean loginSucceeded;

    public void initialize(Subject subject, CallbackHandler callbackHandler, Map sharedState, Map options) {
        this.subject = subject;
        this.callbackHandler = callbackHandler;
        debug = "true".equalsIgnoreCase((String)options.get("debug"));
        credentialsInvalidate = "true".equalsIgnoreCase((String)options.get("credentialsInvalidate"));
        if (options.get(GUEST_USER) != null) {
            userName = (String)options.get(GUEST_USER);
        if (options.get(GUEST_GROUP) != null) {
            groupName = (String)options.get(GUEST_GROUP);
        principals.add(new UserPrincipal(userName));
        principals.add(new GroupPrincipal(groupName));
        if (debug) {
            LOG.debug("Initialized debug=" + debug + " guestUser=" + userName + " guestGroup=" + groupName);


    public boolean login() throws LoginException {
        loginSucceeded = true;
        if (credentialsInvalidate) {
            PasswordCallback passwordCallback = new PasswordCallback("Password: ", false);
            try {
                 callbackHandler.handle(new Callback[]{passwordCallback});
                 if (passwordCallback.getPassword() != null) {
                     if (debug) {
                        LOG.debug("Guest login failing (credentialsInvalidate=true) on presence of a password");
                     loginSucceeded = false;
             } catch (IOException ioe) {
             } catch (UnsupportedCallbackException uce) {
        if (debug) {
            LOG.debug("Guest login " + loginSucceeded);
        return loginSucceeded;

    public boolean commit() throws LoginException {
        if (loginSucceeded) {

        if (debug) {
        return loginSucceeded;

    public boolean abort() throws LoginException {

        if (debug) {
        return true;

    public boolean logout() throws LoginException {

        if (debug) {
        return true;

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ GuestLoginModule.java source code file:

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