ShowHandler.java

/*
 * Copyright 2012-2015 org.opencloudb.
 *  
 * 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 org.opencloudb.handler;

import org.opencloudb.config.ErrorCode;
import org.opencloudb.manager.ManagerConnection;
import org.opencloudb.parser.ManagerParseShow;
import org.opencloudb.parser.util.ParseUtil;
import org.opencloudb.response.ShowBackend;
import org.opencloudb.response.ShowCollation;
import org.opencloudb.response.ShowCommand;
import org.opencloudb.response.ShowConnection;
import org.opencloudb.response.ShowConnectionSQL;
import org.opencloudb.response.ShowDataNode;
import org.opencloudb.response.ShowDataSource;
import org.opencloudb.response.ShowDatabase;
import org.opencloudb.response.ShowHeartbeat;
import org.opencloudb.response.ShowHelp;
import org.opencloudb.response.ShowParser;
import org.opencloudb.response.ShowProcessor;
import org.opencloudb.response.ShowRouter;
import org.opencloudb.response.ShowSQL;
import org.opencloudb.response.ShowSQLDetail;
import org.opencloudb.response.ShowSQLExecute;
import org.opencloudb.response.ShowSQLSlow;
import org.opencloudb.response.ShowServer;
import org.opencloudb.response.ShowThreadPool;
import org.opencloudb.response.ShowTime;
import org.opencloudb.response.ShowVariables;
import org.opencloudb.response.ShowVersion;
import org.opencloudb.util.StringUtil;

/**
 * @author mycat
 */
public final class ShowHandler {

	public static void handle(String stmt, ManagerConnection c, int offset) {
		int rs = ManagerParseShow.parse(stmt, offset);
		switch (rs & 0xff) {
		case ManagerParseShow.COMMAND:
			ShowCommand.execute(c);
			break;
		case ManagerParseShow.COLLATION:
			ShowCollation.execute(c);
			break;
		case ManagerParseShow.CONNECTION:
			ShowConnection.execute(c);
			break;
		case ManagerParseShow.BACKEND:
			ShowBackend.execute(c);
			break;
		case ManagerParseShow.CONNECTION_SQL:
			ShowConnectionSQL.execute(c);
			break;
		case ManagerParseShow.DATABASE:
			ShowDatabase.execute(c);
			break;
		case ManagerParseShow.DATANODE:
			ShowDataNode.execute(c, null);
			break;
		case ManagerParseShow.DATANODE_WHERE: {
			String name = stmt.substring(rs >>> 8).trim();
			if (StringUtil.isEmpty(name)) {
				c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
			} else {
				ShowDataNode.execute(c, name);
			}
			break;
		}
		case ManagerParseShow.DATASOURCE:
			ShowDataSource.execute(c, null);
			break;
		case ManagerParseShow.DATASOURCE_WHERE: {
			String name = stmt.substring(rs >>> 8).trim();
			if (StringUtil.isEmpty(name)) {
				c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
			} else {
				ShowDataSource.execute(c, name);
			}
			break;
		}
		case ManagerParseShow.HELP:
			ShowHelp.execute(c);
			break;
		case ManagerParseShow.HEARTBEAT:
			ShowHeartbeat.response(c);
			break;
		case ManagerParseShow.PARSER:
			ShowParser.execute(c);
			break;
		case ManagerParseShow.PROCESSOR:
			ShowProcessor.execute(c);
			break;
		case ManagerParseShow.ROUTER:
			ShowRouter.execute(c);
			break;
		case ManagerParseShow.SERVER:
			ShowServer.execute(c);
			break;
		case ManagerParseShow.SQL:
			ShowSQL.execute(c, ParseUtil.getSQLId(stmt));
			break;
		case ManagerParseShow.SQL_DETAIL:
			ShowSQLDetail.execute(c, ParseUtil.getSQLId(stmt));
			break;
		case ManagerParseShow.SQL_EXECUTE:
			ShowSQLExecute.execute(c);
			break;
		case ManagerParseShow.SQL_SLOW:
			ShowSQLSlow.execute(c);
			break;
		case ManagerParseShow.SLOW_DATANODE: {
			String name = stmt.substring(rs >>> 8).trim();
			if (StringUtil.isEmpty(name)) {
				c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
			} else {
				// ShowSlow.dataNode(c, name);
				c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
			}
			break;
		}
		case ManagerParseShow.SLOW_SCHEMA: {
			String name = stmt.substring(rs >>> 8).trim();
			if (StringUtil.isEmpty(name)) {
				c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
			} else {
				c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
				// ShowSlow.schema(c, name);
			}
			break;
		}
		case ManagerParseShow.THREADPOOL:
			ShowThreadPool.execute(c);
			break;
		case ManagerParseShow.TIME_CURRENT:
			ShowTime.execute(c, ManagerParseShow.TIME_CURRENT);
			break;
		case ManagerParseShow.TIME_STARTUP:
			ShowTime.execute(c, ManagerParseShow.TIME_STARTUP);
			break;
		case ManagerParseShow.VARIABLES:
			ShowVariables.execute(c);
			break;
		case ManagerParseShow.VERSION:
			ShowVersion.execute(c);
			break;
		default:
			c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
		}
	}
}