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/*
 * @(#)BrokerDAO.java	1.17 06/29/07
 */ 

package com.sun.messaging.jmq.jmsserver.persist.jdbc;

import com.sun.messaging.jmq.util.UID;
import com.sun.messaging.jmq.jmsserver.util.BrokerException;
import com.sun.messaging.jmq.jmsserver.persist.HABrokerInfo;
import com.sun.messaging.jmq.jmsserver.persist.jdbc.comm.BaseDAO;
import com.sun.messaging.jmq.jmsserver.cluster.BrokerState;

import java.sql.Connection;
import java.util.HashMap;

/**
 * This class is an interface for the Broker table which will be implemented
 * by database specific code.
 */
public interface BrokerDAO extends BaseDAO {

    /**
     * Broker table:
     * Holds all the broker info in a HA cluster.
     *
     * CREATE TABLE MQBKR<schemaVersion>[C<clusterID>|S<brokerID>] (
     * 		ID                  VARCHAR(100) NOT NULL,
     * 		URL                 VARCHAR(100) NOT NULL,
     * 		VERSION             INTEGER NOT NULL,
     * 		STATE               INTEGER NOT NULL,
     * 		TAKEOVER_BROKER     VARCHAR(100),
     * 		HEARTBEAT_TS        BIGINT,
     * 		PRIMARY KEY(ID)
     * );
     *
     * ID - Unique ID of the broker
     * URL - The URL of the broker (i.e. includes hostname and port)
     * VERSION - Current version of the borker
     * STATE - State of the broker
     * TAKEOVER_BROKER - Name of broker that has taken over the store
     * HEARTBEAT_TS - Timestamp periodically updated by a running borker
     */
    public static final String TABLE = "MQBKR";
    public static final String TABLE_NAME_PREFIX = TABLE + DBConstants.SCHEMA_VERSION;
    public static final String ID_COLUMN = "ID";
    public static final String URL_COLUMN = "URL";
    public static final String VERSION_COLUMN = "VERSION";
    public static final String STATE_COLUMN = "STATE";
    public static final String TAKEOVER_BROKER_COLUMN = "TAKEOVER_BROKER";
    public static final String HEARTBEAT_TS_COLUMN = "HEARTBEAT_TS";

    void insert( Connection conn, String id, String takeoverID, String url,
        int version, int state, long sessionID, long heartbeat )
        throws BrokerException;

    UID update( Connection conn, String id, int updateType, Object oldValue, Object newValue )
        throws BrokerException;

    Long updateHeartbeat( Connection conn, String id )
        throws BrokerException;

    Long updateHeartbeat( Connection conn, String id,
        long lastHeartbeat ) throws BrokerException;

    boolean updateState( Connection conn, String id, BrokerState newState,
        BrokerState expectedState, boolean local) throws BrokerException;

    void delete( Connection conn, String id ) throws BrokerException;

    HABrokerInfo takeover( Connection conn, String brokerID,
        String targetBrokerID, long lastHeartbeat, BrokerState expectedState,
        long newHeartbeat, BrokerState newState) throws BrokerException;

    long getHeartbeat( Connection conn, String id ) throws BrokerException;

    HashMap getAllHeartbeats( Connection conn ) throws BrokerException;

    BrokerState getState( Connection conn, String id ) throws BrokerException;

    Object[] getAllStates( Connection conn ) throws BrokerException;

    HABrokerInfo getBrokerInfo( Connection conn, String id ) throws BrokerException;

    HashMap getAllBrokerInfos( Connection conn, boolean loadSession )
        throws BrokerException;

    HashMap getAllBrokerInfosByState( Connection conn, BrokerState state )
        throws BrokerException;

    boolean isBeingTakenOver( Connection conn, String id ) throws BrokerException;
}
