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5f5c0937d1
* Rename web to wherehows-api and update README. * Rename backend-service to wherehows-backend * Rename metadata-etl to wherehows-etl * Rename hadoop-dataset-extractor-standalone to wherehows-hadoop
106 lines
3.5 KiB
Java
106 lines
3.5 KiB
Java
/**
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* Copyright 2015 LinkedIn Corp. All rights reserved.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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package utils;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.Set;
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import play.Logger;
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/**
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* Urn class used for urn conversion
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* Created by zsun on 1/15/15.
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*/
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public class Urn {
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public String urnString;
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public String datasetType;
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public String schemaName;
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public String abstractObjectName;
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static final String[] stoList = new String[] {"teradata", "hdfs", "hive", "dalids", "oracle", "mysql", "pinot"};
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static final Set<String> datasetTypes = new HashSet<String>(Arrays.asList(stoList));
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/**
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* Urn can contain 3 parts
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* (1) (2) (3)
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* dataset_type://cluster:port/parent/name
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* the 2nd part is only used to identify deployed dataset instance
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* for dataset definition, we only use part (1) + (3)
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*/
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public Urn(String urnString) {
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this.urnString = urnString;
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String[] splitResult = urnString.split(":///");
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datasetType = splitResult[0].toLowerCase();
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Logger.debug(urnString);
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switch (datasetType) {
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/* example: hdfs:///data/tracking/PageViewEvent -> 'hdfs', '', 'data/tracking/PageViewEvent' */
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case "hdfs": abstractObjectName = "/" + splitResult[1];
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schemaName = "";
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break;
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/* example: teradata:///dwh_dim/dim_table_name -> 'teradata', 'dwh_dim', 'dim_table_name'
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* hive:///db_name/table_name -> 'hive', 'db_name', 'table_name'
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* */
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case "teradata":
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case "oracle":
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case "mysql":
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case "espresso":
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case "pinot":
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case "hive":
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case "dalids":
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String[] split2 = splitResult[1].split("/");
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abstractObjectName = split2[split2.length-1];
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StringBuffer sb = new StringBuffer();
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if (split2.length > 1) {
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for (int i = 0; i < split2.length - 1; i++) {
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sb.append(split2[i]);
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sb.append("/");
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}
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sb.deleteCharAt(sb.length() - 1);
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}
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schemaName = sb.toString();
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break;
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default: abstractObjectName = splitResult[1];
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}
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}
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public Urn(String datasetType, String schemaName, String abstractObjectName) {
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this.datasetType = datasetType.toLowerCase();
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if (schemaName != null)
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this.schemaName = schemaName.toLowerCase();
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this.abstractObjectName = abstractObjectName;
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switch (this.datasetType) {
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case "teradata":
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case "oracle":
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case "mysql":
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case "espresso":
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case "pinot":
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case "hive":
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case "dalids":
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urnString = this.datasetType + ":///" + schemaName + "/" + abstractObjectName;
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break;
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default: String trimName = abstractObjectName.startsWith("/") ? abstractObjectName.substring(1) : abstractObjectName;
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urnString = this.datasetType + ":///" + trimName;
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}
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}
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public static boolean validateUrn(String urnString) {
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String[] splitResult = urnString.split(":///");
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if ((datasetTypes.contains(splitResult[0]) || splitResult[0].matches("\\w+")) &&
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splitResult.length > 1)
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return true;
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return false;
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}
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}
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