ServerQueryHandler.java

/*
 * Copyright 1999-2012 Alibaba Group.
 * 
 * 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 fm.liu.timo.server;

import org.pmw.tinylog.Logger;
import fm.liu.timo.net.handler.FrontendQueryHandler;
import fm.liu.timo.server.handler.BeginHandler;
import fm.liu.timo.server.handler.CommitHandler;
import fm.liu.timo.server.handler.ExplainHandler;
import fm.liu.timo.server.handler.KillHandler;
import fm.liu.timo.server.handler.KillQueryHandler;
import fm.liu.timo.server.handler.RollbackHandler;
import fm.liu.timo.server.handler.SavepointHandler;
import fm.liu.timo.server.handler.SelectHandler;
import fm.liu.timo.server.handler.ServerPrepareHandler;
import fm.liu.timo.server.handler.SetHandler;
import fm.liu.timo.server.handler.ShowHandler;
import fm.liu.timo.server.handler.StartHandler;
import fm.liu.timo.server.handler.UseHandler;
import fm.liu.timo.server.parser.ServerParse;

/**
 * @author xianmao.hexm
 */
public class ServerQueryHandler implements FrontendQueryHandler {

    private final ServerConnection source;

    public ServerQueryHandler(ServerConnection source) {
        this.source = source;
    }

    @Override
    public void query(String sql) {
        ServerConnection c = this.source;
        if (Logger.isDebugEnabled()) {
            Logger.debug("SQL:'{}' from {}", sql, c);
        }
        int rs = ServerParse.parse(sql);
        switch (rs & 0xff) {
            case ServerParse.EXPLAIN:
                ExplainHandler.handle(sql, c, rs >>> 8);
                break;
            case ServerParse.SET:
                SetHandler.handle(sql, c, rs >>> 8);
                break;
            case ServerParse.SHOW:
                ShowHandler.handle(sql, c, rs >>> 8);
                break;
            case ServerParse.SELECT:
                SelectHandler.handle(sql, c, rs >>> 8);
                break;
            case ServerParse.START:
                StartHandler.handle(sql, c, rs >>> 8);
                break;
            case ServerParse.BEGIN:
                BeginHandler.handle(sql, c);
                break;
            case ServerParse.SAVEPOINT:
                SavepointHandler.handle(sql, c);
                break;
            case ServerParse.KILL:
                KillHandler.handle(sql, rs >>> 8, c);
                break;
            case ServerParse.KILL_QUERY:
                KillQueryHandler.handle(sql, rs >>> 8, c);
                break;
            case ServerParse.USE:
                UseHandler.handle(sql, c, rs >>> 8);
                break;
            case ServerParse.COMMIT:
                CommitHandler.handle(c);
                break;
            case ServerParse.ROLLBACK:
                RollbackHandler.handle(c);
                break;
            case ServerParse.PREPARE:
                ServerPrepareHandler.prepare(sql, c);
                break;
            case ServerParse.EXECUTE:
                ServerPrepareHandler.execute(sql, c);
                break;
            case ServerParse.DROP_PREPARE:
                ServerPrepareHandler.close(sql, c);
                break;
            default:
                c.execute(sql, rs);
        }
    }

}