/**
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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 java.sql.*;
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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 10:24
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* @description SQL Server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 SQLServerSync extends AbstractDBSync implements DBSync {
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//private Logger logger = Logger.getLogger(SQLServerSync.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 fieldStr = jobItem.getDestTableFields();
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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 destTableKey = jobItem.getDestTableKey();
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String destTable = jobItem.getDestTable();
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Statement stat = srcConn.createStatement();
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ResultSet rs = stat.executeQuery(srcSql);
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StringBuffer sql = new StringBuffer();
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long count = 0;
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while (rs.next()) {
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sql.setLength(0);
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sql.append("if not exists (select ").append(destTableKey).append(" from ").append(destTable).append(" where ").append(destTableKey).append("='").append(rs.getString(destTableKey))
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.append("')").append("insert into ").append(destTable).append("(").append(fieldStr).append(") values(");
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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(") else update ").append(destTable).append(" set ");
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for (int index = 0; index < updateFields.length; index++) {
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sql.append(updateFields[index]).append("='").append(rs.getString(updateFields[index])).append(index == (updateFields.length - 1) ? "'" : "',");
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}
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sql.append(" where ").append(destTableKey).append("='").append(rs.getString(destTableKey)).append("';");
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//lstSQL.add(sql.toString());
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count++;
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// this.logger.info("第" + count + "耗时: " + (new Date().getTime() - oneStart) + "ms");
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}
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SyncLog.logger.info("总共查询到 " + count + " 条记录");
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if (rs != null) {
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rs.close();
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}
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if (stat != null) {
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stat.close();
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}
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return count;
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//return true;//count > 0 ? new String[] {sql.toString()} : 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(sqls.toString());
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pst.executeUpdate();
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conn.commit();
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pst.close();
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}
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}
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