/* * 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.server.handler; import java.io.UnsupportedEncodingException; import java.util.HashMap; import java.util.Map; import org.opencloudb.config.ErrorCode; import org.opencloudb.mysql.ByteUtil; import org.opencloudb.mysql.PreparedStatement; import org.opencloudb.net.handler.FrontendPrepareHandler; import org.opencloudb.net.mysql.ExecutePacket; import org.opencloudb.server.ServerConnection; import org.opencloudb.server.response.PreparedStmtResponse; /** * @author mycat */ public class ServerPrepareHandler implements FrontendPrepareHandler { private ServerConnection source; private volatile long pstmtId; private Map<String, PreparedStatement> pstmtForSql; private Map<Long, PreparedStatement> pstmtForId; public ServerPrepareHandler(ServerConnection source) { this.source = source; this.pstmtId = 0L; this.pstmtForSql = new HashMap<String, PreparedStatement>(); this.pstmtForId = new HashMap<Long, PreparedStatement>(); } @Override public void prepare(String sql) { PreparedStatement pstmt = null; if ((pstmt = pstmtForSql.get(sql)) == null) { pstmt = new PreparedStatement(++pstmtId, sql, 0, 0); pstmtForSql.put(pstmt.getStatement(), pstmt); pstmtForId.put(pstmt.getId(), pstmt); } PreparedStmtResponse.response(pstmt, source); } @Override public void execute(byte[] data) { long pstmtId = ByteUtil.readUB4(data, 5); PreparedStatement pstmt = null; if ((pstmt = pstmtForSql.get(pstmtId)) == null) { source.writeErrMessage(ErrorCode.ER_ERROR_WHEN_EXECUTING_COMMAND, "Unknown pstmtId when executing."); } else { ExecutePacket packet = new ExecutePacket(pstmt); try { packet.read(data, source.getCharset()); } catch (UnsupportedEncodingException e) { source.writeErrMessage(ErrorCode.ER_ERROR_WHEN_EXECUTING_COMMAND, e.getMessage()); return; } // TODO ... } } @Override public void close() { // TODO Auto-generated method stub } }