ActiveMQ example source code file (SimpleAuthenticationBroker.java)

This example ActiveMQ source code file (SimpleAuthenticationBroker.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

connectioninfo, copyonwritearraylist, exception, exception, iterator, map, map, securitycontext, set, set, simpleauthenticationbroker, string, string, threading, threads, user, util

The ActiveMQ SimpleAuthenticationBroker.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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.activemq.security;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.activemq.broker.Broker;
import org.apache.activemq.broker.BrokerFilter;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.command.ConnectionInfo;
import org.apache.activemq.jaas.GroupPrincipal;

/**
 * Handles authenticating a users against a simple user name/password map.
 * 
 * 
 */
public class SimpleAuthenticationBroker extends BrokerFilter {

    private boolean anonymousAccessAllowed = false;
    private String anonymousUser;
    private String anonymousGroup;
    private final Map userPasswords;
    private final Map userGroups;
    private final CopyOnWriteArrayList<SecurityContext> securityContexts = new CopyOnWriteArrayList();

    public SimpleAuthenticationBroker(Broker next, Map userPasswords, Map userGroups) {
        super(next);
        this.userPasswords = userPasswords;
        this.userGroups = userGroups;
    }
    
    public void setAnonymousAccessAllowed(boolean anonymousAccessAllowed) {
        this.anonymousAccessAllowed = anonymousAccessAllowed;
    }

    public void setAnonymousUser(String anonymousUser) {
        this.anonymousUser = anonymousUser;
    }

    public void setAnonymousGroup(String anonymousGroup) {
        this.anonymousGroup = anonymousGroup;
    }

    public void addConnection(ConnectionContext context, ConnectionInfo info) throws Exception {

    	SecurityContext s = context.getSecurityContext();
        if (s == null) {
            // Check the username and password.
            if (anonymousAccessAllowed && info.getUserName() == null && info.getPassword() == null) {
                info.setUserName(anonymousUser);
                s = new SecurityContext(info.getUserName()) {
                    public Set getPrincipals() {
                        Set groups = new HashSet();
                        groups.add(new GroupPrincipal(anonymousGroup));
                        return groups;
                    }
                };
            } else {
                String pw = (String) userPasswords.get(info.getUserName());
                if (pw == null || !pw.equals(info.getPassword())) {
                    throw new SecurityException(
                            "User name or password is invalid.");
                }

                final Set groups = (Set) userGroups.get(info.getUserName());
                s = new SecurityContext(info.getUserName()) {
                    public Set<?> getPrincipals() {
                        return groups;
                    }
                };
            }

            context.setSecurityContext(s);
            securityContexts.add(s);
        }
        try {
            super.addConnection(context, info);
        } catch (Exception e) {
            securityContexts.remove(s);
            context.setSecurityContext(null);
            throw e;
        }
    }

    public void removeConnection(ConnectionContext context, ConnectionInfo info, Throwable error)
        throws Exception {
        super.removeConnection(context, info, error);
        if (securityContexts.remove(context.getSecurityContext())) {
            context.setSecurityContext(null);
        }
    }

    /**
     * Previously logged in users may no longer have the same access anymore.
     * Refresh all the logged into users.
     */
    public void refresh() {
        for (Iterator<SecurityContext> iter = securityContexts.iterator(); iter.hasNext();) {
            SecurityContext sc = iter.next();
            sc.getAuthorizedReadDests().clear();
            sc.getAuthorizedWriteDests().clear();
        }
    }

}