/* * Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software;Designed and Developed mainly by many Chinese * opensource volunteers. you can redistribute it and/or modify it under the * terms of the GNU General Public License version 2 only, as published by the * Free Software Foundation. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Any questions about this component can be directed to it's project Web address * https://code.google.com/p/opencloudb/. * */ package org.opencloudb.route; import java.io.Serializable; import org.opencloudb.server.parser.ServerParse; /** * @author mycat */ public final class RouteResultsetNode implements Serializable { private final String name; // 数据节点名称 private String statement; // 执行的语句 private final String srcStatement; private final int sqlType; private final boolean canRunInReadDB; private final boolean hasBlanceFlag; public RouteResultsetNode(String name, int sqlType, String srcStatement) { this.name = name; this.sqlType = sqlType; this.srcStatement = srcStatement; this.statement = srcStatement; canRunInReadDB = (sqlType == ServerParse.SELECT || sqlType == ServerParse.SHOW); hasBlanceFlag = (statement!=null)&&statement.startsWith("/*balance*/"); } public void setStatement(String statement) { this.statement = statement; } public void resetStatement() { this.statement = srcStatement; } public boolean canRunnINReadDB(boolean autocommit) { return canRunInReadDB && (autocommit || hasBlanceFlag); } public String getName() { return name; } public int getSqlType() { return sqlType; } public String getStatement() { return statement; } @Override public int hashCode() { return name.hashCode(); } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj instanceof RouteResultsetNode) { RouteResultsetNode rrn = (RouteResultsetNode) obj; if (equals(name, rrn.getName())) { return true; } } return false; } @Override public String toString() { StringBuilder s = new StringBuilder(); s.append(name); s.append('{').append(statement).append('}'); return s.toString(); } private static boolean equals(String str1, String str2) { if (str1 == null) { return str2 == null; } return str1.equals(str2); } public boolean isModifySQL() { return !canRunInReadDB; } }