jahiadbpoolservice.java

java 写的一个新闻发布系统

//
//  JahiaDBPoolService
//  EV      31.10.2000
//
//  initConnectionPool
//  getConnection
//  freeConnection
//

package org.jahia.services.database;

import org.jahia.utils.*;           // JahiaConsole
import org.jahia.settings.*;        // JahiaPrivateSettings
import org.jahia.services.*;        // JahiaService
import java.sql.*;                      // Statement, ResultSet


public abstract class JahiaDBPoolService extends JahiaService {


   /***
    * getConnection
    * EV    31.10.2000
    * EV    13.12.2000  New Khue Version !!
    *
    */
    public abstract Connection getConnection(int debugID) throws SQLException;

   /***
    * getConnection
    * the debugID is 0 not used in this case
    *
    * EV    31.10.2000
    * EV    13.12.2000  New Khue Version !!
    *
    */
    public abstract Connection getConnection()
    throws SQLException;


   /***
    * freeConnection
    * EV    31.10.2000
    * EV    13.12.2000  New Khue Version !!
    *
    */
    public abstract void freeConnection( Connection connexion ) throws SQLException;


    /**
     * getNbFreeConnections
     * NK Return the number of available connection
     * NK 13.12.2000
     */
    public abstract int getNbFreeConnections();

    /**
     * Returns the configured minimum size of the connection pool
     * @return an integer representing the minimum size of the pool as
     * configured via the constructor
     */
    public abstract int getMinConnections();

    /**
     * Returns the configured maximum size of the connection pool
     * @return an integer representing the maximum size of the pool as configured
     * via the constructor
     */
    public abstract int getMaxConnections();

    /**
     * Returns the number of connections managed by this pool that are not
     * available (ie are busy handling SQL queries)
     * @return an integer representing the number of busy queries
     */
    public abstract int getBusyConnections();

    /**
     * Returns the number of connections both in the busy state and in
     * the available pool. Basically this returns the number of connections
     * to the database that are handled by this connection pool at the
     * current time
     * @return an integer representing the sum of the available pool and
     * the currently used connections.
     */
    public abstract int getTotalConnections();


    public abstract int executeUpdate( Statement stmt, String s )throws SQLException;
    public abstract ResultSet executeQuery( Statement stmt, String s )throws SQLException;


} // end JahiaDBPoolService