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/*
 * This software is released under a licence similar to the Apache Software Licence.
 * See org.logicalcobwebs.proxool.package.html for details.
 * The latest version is available at http://proxool.sourceforge.net
 */
package org.logicalcobwebs.proxool.admin;

import org.logicalcobwebs.proxool.ConnectionInfoIF;

import java.util.Date;

/**
 * Provides a snapshot of a pool
 *
 * @version $Revision: 1.3 $, $Date: 2005/10/02 12:32:01 $
 * @author bill
 * @author $Author: billhorsman $ (current maintainer)
 * @since Proxool 0.7
 */
public interface SnapshotIF {

    /**
     * When the pool was started
     * @return dateStarted
     */
    Date getDateStarted();

    /**
     * How many connections have been served since the pool started
     * @return servedCount
     */
    long getServedCount();

    /**
     * How many connections have been refused since the pool started
     * @return refusedCount
     */
    long getRefusedCount();

    /**
     * The number of active (busy) connections
     * @return activeConnectionCount
     */
    int getActiveConnectionCount();

    /**
     * The number of available (free) connections
     * @return availableConnectionCount
     */
    int getAvailableConnectionCount();

    /**
     * The number of offline connections. A connection is offline
     * if it is being tested by the house keeper.
     * @return offlineConnectionCount
     */
    int getOfflineConnectionCount();

    /**
     * Get the maximum possible connections (as defined in the
     * {@link org.logicalcobwebs.proxool.ConnectionPoolDefinitionIF definition}.
     * @return maximumConnectionCount
     */
    int getMaximumConnectionCount();

    /**
     * The date that this snapshot applies
     * @return snapshotDate
     */
    Date getSnapshotDate();

    /**
     * The details of each connection.  Will be null if this is not a
     * detailed snapshot.
     * @return connectionInfos
     * @see #isDetail
     */
    ConnectionInfoIF[] getConnectionInfos();

    /**
     * The details of one connection.  Will be null if this is not a
     * detailed snapshot or if this ID is not found.
     * @param id the connection {@link ConnectionInfoIF#getId ID}
     * @return connectionInfo
     * @see #isDetail
     */
    ConnectionInfoIF getConnectionInfo(long id);

    /**
     * Whether we have requested detailed information about each
     * connection
     * @return detail
     * @see #getConnectionInfos
     */
    boolean isDetail();

    long getConnectionCount();
}


/*
 Revision history:
 $Log: SnapshotIF.java,v $
 Revision 1.3  2005/10/02 12:32:01  billhorsman
 Make connectionCount available to statistics

 Revision 1.2  2003/03/03 11:11:59  billhorsman
 fixed licence

 Revision 1.1  2003/02/19 23:36:51  billhorsman
 renamed monitor package to admin

 Revision 1.2  2003/02/12 12:28:28  billhorsman
 added url, proxyHashcode and delegateHashcode to
 ConnectionInfoIF

 Revision 1.1  2003/01/31 11:35:57  billhorsman
 improvements to servlet (including connection details)

 Revision 1.1  2003/01/30 17:20:15  billhorsman
 fixes, improvements and doc

 */