scriptis left database menu bar supports hiveserver2 to get library table fields #4909
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| */ | ||
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| package org.apache.linkis.metadata.util; | ||
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| import org.apache.commons.lang.StringUtils; | ||
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| import java.sql.*; | ||
| import java.text.SimpleDateFormat; | ||
| import java.util.*; | ||
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| import java.util.concurrent.CopyOnWriteArrayList; | ||
| import java.util.stream.Collectors; | ||
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| import com.fasterxml.jackson.databind.JsonNode; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.fasterxml.jackson.databind.node.ArrayNode; | ||
| import com.fasterxml.jackson.databind.node.ObjectNode; | ||
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| /** @author Qin* */ | ||
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There was a problem hiding this comment. need to remove author info |
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| public class HiveService2Utils { | ||
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| private static final String driverName = "org.apache.hive.jdbc.HiveDriver"; | ||
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| private static final String defaultDb = "default"; | ||
| private static Connection conn = null; | ||
| private static Statement stat = null; | ||
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There was a problem hiding this comment. It should not be defined as a property, otherwise there will be concurrency problems |
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| private static ResultSet rs = null; | ||
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| static ObjectMapper jsonMapper = new ObjectMapper(); | ||
| static SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US); | ||
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| /** 判断是否启动hiveServer2查询左侧菜单栏 */ | ||
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| public static Boolean checkHiveServer2Enable() { | ||
| return DWSConfig.HIVE_SERVER2_ENABLE.getValue(); | ||
| } | ||
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| static String hiveServer2Address = DWSConfig.HIVE_SERVER2_URL.getValue(); | ||
| static String hiveServer2Username = DWSConfig.HIVE_SERVER2_USERNAME.getValue(); | ||
| static String hiveServer2Password = DWSConfig.HIVE_SERVER2_PASSWORD.getValue(); | ||
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| /** | ||
| * 获取链接 | ||
| * | ||
| * @param username 用户名 | ||
| */ | ||
| private static void getConn(String username, String db) throws Exception { | ||
| Class.forName(driverName); | ||
| String url = | ||
| hiveServer2Address.endsWith("/") ? hiveServer2Address + db : hiveServer2Address + "/" + db; | ||
| if (StringUtils.isNotBlank(hiveServer2Username)) { | ||
| username = hiveServer2Username; | ||
| } | ||
| conn = DriverManager.getConnection(url, username, hiveServer2Password); | ||
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There was a problem hiding this comment. Need to use connection pool? |
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| stat = conn.createStatement(); | ||
| } | ||
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| /** 获取数据库 */ | ||
| public static JsonNode getDbs(String username) throws Exception { | ||
| ArrayNode dbsNode = jsonMapper.createArrayNode(); | ||
| List<String> dbs = new CopyOnWriteArrayList<>(); | ||
| try { | ||
| getConn(username, defaultDb); | ||
| rs = stat.executeQuery("show databases"); | ||
| while (rs.next()) { | ||
| dbs.add(rs.getString(1)); | ||
| } | ||
| } finally { | ||
| destroy(); | ||
| } | ||
| for (String db : dbs) { | ||
| ObjectNode dbNode = jsonMapper.createObjectNode(); | ||
| dbNode.put("dbName", db); | ||
| dbsNode.add(dbNode); | ||
| } | ||
| return dbsNode; | ||
| } | ||
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| /** | ||
| * 获取指定数据库的所有表 | ||
| * | ||
| * @param dbName 数据库 | ||
| */ | ||
| public static JsonNode getTables(String username, String dbName) throws Exception { | ||
| ArrayNode tablesNode = jsonMapper.createArrayNode(); | ||
| try { | ||
| List<String> tableNames = new ArrayList<>(); | ||
| getConn(username, dbName); | ||
| rs = stat.executeQuery("show tables"); | ||
| while (rs.next()) { | ||
| String tableName = rs.getString(1); | ||
| tableNames.add(tableName); | ||
| } | ||
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| // 获取每个表的详细信息 | ||
| for (String tableName : tableNames) { | ||
| ObjectNode tableNode = jsonMapper.createObjectNode(); | ||
| // 获取表详细信息 | ||
| ResultSet describeRs = stat.executeQuery("DESCRIBE FORMATTED " + tableName); | ||
| while (describeRs.next()) { | ||
| String columnName = describeRs.getString(1); | ||
| String dataType = describeRs.getString(2); | ||
| if (null != columnName) { | ||
| columnName = columnName.trim(); | ||
| } | ||
| if (null != dataType) { | ||
| dataType = dataType.trim(); | ||
| } | ||
| if (columnName.contains("Owner:")) { | ||
| tableNode.put("createdBy", dataType); | ||
| } | ||
| if (columnName.contains("CreateTime:")) { | ||
| long createdAt = sdf.parse(dataType).getTime() / 1000; | ||
| tableNode.put("createdAt", createdAt); | ||
| break; | ||
| } | ||
| } | ||
| describeRs.close(); | ||
| tableNode.put("databaseName", dbName); | ||
| tableNode.put("tableName", tableName); | ||
| tableNode.put("lastAccessAt", 0); | ||
| tableNode.put("isView", false); | ||
| tablesNode.add(tableNode); | ||
| } | ||
| } finally { | ||
| destroy(); | ||
| } | ||
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| return tablesNode; | ||
| } | ||
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| /** | ||
| * 获取指定表所有字段信息 | ||
| * | ||
| * @param dbName 数据库 | ||
| * @param tbName 数据表 | ||
| */ | ||
| public static JsonNode getColumns(String username, String dbName, String tbName) | ||
| throws Exception { | ||
| ArrayNode columnsNode = jsonMapper.createArrayNode(); | ||
| List<Map<String, Object>> columnMapList = new ArrayList<>(); | ||
| List<String> partitionColumnList = new ArrayList<>(); | ||
| try { | ||
| getConn(username, dbName); | ||
| rs = stat.executeQuery("desc " + tbName); | ||
| while (rs.next()) { | ||
| Map<String, Object> colum = new HashMap<>(); | ||
| String colName = rs.getString("col_name"); | ||
| String dataType = rs.getString("data_type"); | ||
| if (StringUtils.isNotBlank(colName) | ||
| && StringUtils.isNotBlank(dataType) | ||
| && !colName.contains("# Partition Information") | ||
| && !colName.contains("# col_name")) { | ||
| colum.put("columnName", rs.getString("col_name")); | ||
| colum.put("columnType", rs.getString("data_type")); | ||
| colum.put("columnComment", rs.getString("comment")); | ||
| columnMapList.add(colum); | ||
| } | ||
| } | ||
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| boolean partition = false; | ||
| boolean parColName = false; | ||
| ResultSet describeRs = stat.executeQuery("DESCRIBE FORMATTED " + tbName); | ||
| while (describeRs.next()) { | ||
| String columnName = describeRs.getString(1); | ||
| String dataType = describeRs.getString(2); | ||
| if (null != columnName) { | ||
| columnName = columnName.trim(); | ||
| } | ||
| if (null != dataType) { | ||
| dataType = dataType.trim(); | ||
| } | ||
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| // 判断获取分区字段 | ||
| if (columnName.contains("# Partition Information")) { | ||
| partition = true; | ||
| parColName = false; | ||
| continue; | ||
| } | ||
| if (columnName.contains("# col_name")) { | ||
| parColName = true; | ||
| continue; | ||
| } | ||
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| if (partition && parColName) { | ||
| if ("".equals(columnName) && null == dataType) { | ||
| partition = false; | ||
| parColName = false; | ||
| } else { | ||
| partitionColumnList.add(columnName); | ||
| } | ||
| } | ||
| } | ||
| describeRs.close(); | ||
| } finally { | ||
| destroy(); | ||
| } | ||
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| for (Map<String, Object> map : columnMapList.stream().distinct().collect(Collectors.toList())) { | ||
| ObjectNode fieldNode = jsonMapper.createObjectNode(); | ||
| String columnName = map.get("columnName").toString(); | ||
| fieldNode.put("columnName", columnName); | ||
| fieldNode.put("columnType", map.get("columnType").toString()); | ||
| fieldNode.put("columnComment", map.get("columnComment").toString()); | ||
| fieldNode.put("partitioned", partitionColumnList.contains(columnName)); | ||
| columnsNode.add(fieldNode); | ||
| } | ||
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| return columnsNode; | ||
| } | ||
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| // 释放资源 | ||
| private static void destroy() throws SQLException { | ||
| if (rs != null) { | ||
| rs.close(); | ||
| } | ||
| if (stat != null) { | ||
| stat.close(); | ||
| } | ||
| if (conn != null) { | ||
| conn.close(); | ||
| } | ||
| } | ||
| } | ||
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It's better not to import * ,just import the necessary ones.