package com.tesora.dve.db;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import com.tesora.dve.db.mysql.libmy.*;
import com.tesora.dve.exceptions.PEException;
import com.tesora.dve.resultset.ColumnInfo;
import io.netty.channel.ChannelHandlerContext;

public interface MysqlQueryResultConsumer {

    void active(ChannelHandlerContext ctx);

	boolean emptyResultSet(MyOKResponse ok)
			throws PEException;

    void error(MyErrorResponse err)
            throws PEException;

    void fieldCount(MyColumnCount colCount)
            throws PEException;

    void field(int fieldIndex, MyFieldPktResponse columnDef, ColumnInfo columnProjection)
            throws PEException;

	void fieldEOF(MyMessage unknown)
			throws PEException;

    //TODO: rowText() and rowBinary() should probably share an abstract resultrow type, but previous code expected text or bin, and we don't have a great way to convert on a mismatch.
    void rowText(MyTextResultRow textRow)
            throws PEException;

    void rowBinary(MyBinaryResultRow textRow)
            throws PEException;

    /**
     * Called when the upstream processor has no more complete rows buffered, and cannot proceed without more packets from the sender.
     * @throws PEException
     */
    void rowFlush()
            throws PEException;

    void rowEOF(MyEOFPktResponse wholePacket)
            throws PEException;

}