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 * 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   *
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 * 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    *
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 * under the License.                                           *
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package org.apache.james.mailbox;

import java.util.Collection;


/**
 * Subscribes users.
 */
public interface SubscriptionManager extends RequestAware{
    
    /**
     * Subscribes the user in the session to the given mailbox.
     * @param session not null
     * @param mailbox not null
     * @throws SubscriptionException when subscription fails
     */
    public void subscribe(MailboxSession session, String mailbox)
            throws SubscriptionException;

    /**
     * Finds all subscriptions for the user in the session.
     * @param user not null
     * @return not null
     * @throws SubscriptionException when subscriptions cannot be read
     */
    public Collection<String> subscriptions(MailboxSession session) throws SubscriptionException;

    /**
     * Unsubscribes the user in the session from the given mailbox.
     * @param session not null
     * @param mailbox not null
     * @throws SubscriptionException when subscriptions cannot be read
     */
    public void unsubscribe(MailboxSession session, String mailbox)
            throws SubscriptionException;
   
}
