/**
 * Copyright (C) 2005-2008 Jive Software. All rights reserved.
 *
 * Licensed 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.jivesoftware.openfire.audit;

import org.jivesoftware.openfire.session.Session;
import org.xmpp.packet.Packet;

/**
 * <p>Use auditors to audit events and messages on the server.</p>
 * <p>All events and messages are sent to the auditor for recording.
 * The auditor will determine if auditing should take place, and what
 * to do with the data.</p>
 *
 * @author Iain Shigeoka
 */
public interface Auditor {

    /**
     * Audit an XMPP packet.
     *
     * @param packet the packet being audited
     * @param session the session used for sending or receiving the packet
     */
    void audit(Packet packet, Session session);

    /**
     * Audit any packet that was dropped (undeliverables, etc).
     *
     * @param packet the packet that was dropped.
     */
    //void auditDroppedPacket(XMPPPacket packet);

    /**
     * Audit a non-packet event.
     *
     * @param event the event being audited.
     */
    //void audit(AuditEvent event);

    /**
     * Prepares the auditor for system shutdown.
     */
    void stop();

    /**
     * Returns the number of queued packets that are still in memory and need to be saved to a
     * permanent store.
     *
     * @return the number of queued packets that are still in memory.
     */
    int getQueuedPacketsNumber();
}