/**
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* Copyright 2018-2118 the original author or authors.
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* <p>
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.apache.org/licenses/LICENSE-2.0
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.vci.dbsync.dbimpl;
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import com.vci.dbsync.entity.JobItem;
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import com.vci.dbsync.filesync.FileSync;
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import com.vci.dbsync.log.SyncLog;
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import com.vci.dbsync.DBSync;
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import com.vci.dbsync.utils.Tool;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.List;
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/**
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* @author liuyazhuang
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* @date 2018/9/11 10:21
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* @description MySQL数据库同步实现
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* @version 1.0.0
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*/
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public class MySQLSync extends AbstractDBSync implements DBSync {
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//private Logger logger = Logger.getLogger(MySQLSync.class);
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@Override
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public long assembleSQL(JobItem jobItem, Connection srcConn, Connection destConn, FileSync fileSync) throws SQLException {
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String srcSql = jobItem.getSrcSql();
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String uniqueName = Tool.generateString(6) + "_" + jobItem.getName();
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String[] fields = jobItem.getDestTableFields().split(",");
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fields = this.trimArrayItem(fields);
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String[] updateFields = jobItem.getDestTableUpdate().split(",");
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updateFields = this.trimArrayItem(updateFields);
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String destTable = jobItem.getDestTable();
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String destTableKey = jobItem.getDestTableKey();
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PreparedStatement pst = srcConn.prepareStatement(srcSql);
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ResultSet rs = pst.executeQuery();
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StringBuffer sql = new StringBuffer();
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sql.append("insert into ").append(jobItem.getDestTable()).append(" (").append(jobItem.getDestTableFields()).append(") values ");
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long count = 0;
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while (rs.next()) {
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sql.append("(");
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for (int index = 0; index < fields.length; index++) {
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sql.append("'").append(rs.getString(fields[index])).append(index == (fields.length - 1) ? "'" : "',");
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}
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sql.append("),");
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count++;
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}
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if (rs != null) {
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rs.close();
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}
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if (pst != null) {
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pst.close();
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}
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if (count > 0) {
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sql = sql.deleteCharAt(sql.length() - 1);
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if ((!jobItem.getDestTableUpdate().equals("")) && (!jobItem.getDestTableKey().equals(""))) {
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sql.append(" on duplicate key update ");
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for (int index = 0; index < updateFields.length; index++) {
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sql.append(updateFields[index]).append("= values(").append(updateFields[index]).append(index == (updateFields.length - 1) ? ")" : "),");
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}
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StringBuffer sb = new StringBuffer();
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sb.append("alter table ").append(destTable).append(" add constraint ").append(uniqueName).append(" unique (").append(destTableKey).append(");").append(sql.toString())
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.append(";alter table ").append(destTable).append(" drop index ").append(uniqueName);
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//lstSQL.add(sb.toString());
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//return true;//new String[] {sb.toString()};
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}
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SyncLog.logger.debug(sql.toString());
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//lstSQL.add(sql.toString());
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//return true;//new String[] {sql.toString()};
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}
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return count;
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//return false;//null;
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}
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@Override
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public void executeSQL(List<String> sqls, Connection conn) throws SQLException {
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PreparedStatement pst = conn.prepareStatement("");
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//String[] sqlList = sql.split(";");
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for (int index = 0; index < sqls.size(); index++) {
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pst.addBatch(sqls.get(index));
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}
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pst.executeBatch();
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conn.commit();
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pst.close();
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}
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}
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