-
Notifications
You must be signed in to change notification settings - Fork 300
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
8 changed files
with
418 additions
and
55 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
154 changes: 154 additions & 0 deletions
154
athena-hbase/src/main/java/com/amazonaws/athena/connectors/hbase/HbaseTableNameUtils.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| /*- | ||
| * #%L | ||
| * athena-hbase | ||
| * %% | ||
| * Copyright (C) 2019 Amazon Web Services | ||
| * %% | ||
| * 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. | ||
| * #L% | ||
| */ | ||
| package com.amazonaws.athena.connectors.hbase; | ||
|
|
||
| import com.amazonaws.athena.connector.lambda.domain.TableName; | ||
| import com.amazonaws.athena.connectors.hbase.connection.HBaseConnection; | ||
| import com.google.common.collect.ArrayListMultimap; | ||
| import com.google.common.collect.Multimap; | ||
| import org.apache.arrow.util.VisibleForTesting; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.Collection; | ||
| import java.util.Locale; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * This class helps with resolving the differences in casing between HBase and Presto. Presto expects all | ||
| * databases, tables, and columns to be lower case. This class allows us to resolve HBase tables | ||
| * which may have captial letters in them without issue. It does so by fetching all table names and doing | ||
| * a case insensitive search over them. It will first try to do a targeted get to reduce the penalty for | ||
| * tables which don't have capitalization. | ||
| * | ||
| * Modeled off of DynamoDBTableResolver.java | ||
| * | ||
| * TODO add caching | ||
| */ | ||
| public final class HbaseTableNameUtils | ||
| { | ||
| //The HBase namespce qualifier character which commonly separates namespaces and column families from tables and columns. | ||
| protected static final String NAMESPACE_QUALIFIER = ":"; | ||
| protected static final String ENABLE_CASE_INSENSITIVE_MATCH = "enable_case_insensitive_match"; | ||
| private static final Logger logger = LoggerFactory.getLogger(HbaseTableNameUtils.class); | ||
|
|
||
| private HbaseTableNameUtils() {} | ||
|
|
||
| /** | ||
| * Helper which goes from a schema and table name to an HBase table name string | ||
| * @param schema a schema name | ||
| * @param table the name of the table | ||
| * @return | ||
| */ | ||
| public static String getQualifiedTableName(String schema, String table) | ||
| { | ||
| return schema + NAMESPACE_QUALIFIER + table; | ||
| } | ||
|
|
||
| /** | ||
| * Helper which goes from an Athena Federation SDK TableName to an HBase table name string. | ||
| * | ||
| * @param tableName An Athena Federation SDK TableName. | ||
| * @return The corresponding HBase table name string. | ||
| */ | ||
| public static String getQualifiedTableName(TableName tableName) | ||
| { | ||
| return getQualifiedTableName(tableName.getSchemaName(), tableName.getTableName()); | ||
| } | ||
|
|
||
| /** | ||
| * Helper which goes from a schema and table name to an HBase TableName | ||
| * @param schema the schema name | ||
| * @param table the name of the table | ||
| * @return The corresponding HBase TableName | ||
| */ | ||
| public static org.apache.hadoop.hbase.TableName getQualifiedTable(String schema, String table) | ||
| { | ||
| return org.apache.hadoop.hbase.TableName.valueOf(getQualifiedTableName(schema, table)); | ||
| } | ||
|
|
||
| /** | ||
| * Helper which goes from an Athena Federation SDK TableName to an HBase TableName. | ||
| * | ||
| * @param tableName An Athena Federation SDK TableName. | ||
| * @return The corresponding HBase TableName. | ||
| */ | ||
| public static org.apache.hadoop.hbase.TableName getQualifiedTable(TableName tableName) | ||
| { | ||
| return org.apache.hadoop.hbase.TableName.valueOf(getQualifiedTableName(tableName)); | ||
| } | ||
|
|
||
| /** | ||
| * Gets the hbase table name from Athena table name. This is to allow athena to query uppercase table names | ||
| * (since athena does not support them). If an hbase table name is found with the athena table name, it is returned. | ||
| * Otherwise, tryCaseInsensitiveSearch is used to find the corresponding hbase table. | ||
| * | ||
| * @param tableName the case insensitive table name | ||
| * @return the hbase table name | ||
| */ | ||
| public static org.apache.hadoop.hbase.TableName getHbaseTableName(Map<String, String> configOptions, HBaseConnection conn, TableName athTableName) | ||
| throws IOException | ||
| { | ||
| if (!isCaseInsensitiveMatchEnable(configOptions) || !athTableName.getTableName().equals(athTableName.getTableName().toLowerCase())) { | ||
| return getQualifiedTable(athTableName); | ||
| } | ||
| return tryCaseInsensitiveSearch(conn, athTableName); | ||
| } | ||
|
|
||
| /** | ||
| * Performs a case insensitive table search by listing all table names in the schema (namespace), mapping them | ||
| * to their lowercase transformation, and then mapping the given tableName back to a unique table. To prevent ambiguity, | ||
| * an IllegalStateException is thrown if multiple tables map to the given tableName. | ||
| * @param conn the HBaseConnection used to retrieve the tables | ||
| * @param tableName The Athena TableName to find the mapping to | ||
| * @return The HBase TableName containing the found HBase table and the Athena Schema (namespace) | ||
| * @throws IOException | ||
| */ | ||
| @VisibleForTesting | ||
| protected static org.apache.hadoop.hbase.TableName tryCaseInsensitiveSearch(HBaseConnection conn, TableName tableName) | ||
| throws IOException | ||
| { | ||
| logger.info("Case Insensitive Match enabled. Searching for Table {}.", tableName.getTableName()); | ||
| Multimap<String, String> lowerCaseNameMapping = ArrayListMultimap.create(); | ||
| org.apache.hadoop.hbase.TableName[] tableNames = conn.listTableNamesByNamespace(tableName.getSchemaName()); | ||
| for (org.apache.hadoop.hbase.TableName nextTableName : tableNames) { | ||
| lowerCaseNameMapping.put(nextTableName.getQualifierAsString().toLowerCase(Locale.ENGLISH), nextTableName.getNameAsString()); | ||
| } | ||
| Collection<String> mappedNames = lowerCaseNameMapping.get(tableName.getTableName()); | ||
| if (mappedNames.size() != 1) { | ||
| throw new IllegalStateException(String.format("Either no tables or multiple tables resolved from case insensitive name %s: %s", tableName.getTableName(), mappedNames)); | ||
| } | ||
| org.apache.hadoop.hbase.TableName result = org.apache.hadoop.hbase.TableName.valueOf(mappedNames.iterator().next()); | ||
| logger.info("CaseInsensitiveMatch, TableName resolved to: {}", result.getNameAsString()); | ||
| return result; | ||
| } | ||
|
|
||
| private static boolean isCaseInsensitiveMatchEnable(Map<String, String> configOptions) | ||
| { | ||
| String enableCaseInsensitiveMatchEnvValue = configOptions.getOrDefault(ENABLE_CASE_INSENSITIVE_MATCH, "false").toLowerCase(); | ||
| boolean enableCaseInsensitiveMatch = enableCaseInsensitiveMatchEnvValue.equals("true"); | ||
| logger.info("{} environment variable set to: {}. Resolved to: {}", | ||
| ENABLE_CASE_INSENSITIVE_MATCH, enableCaseInsensitiveMatchEnvValue, enableCaseInsensitiveMatch); | ||
|
|
||
| return enableCaseInsensitiveMatch; | ||
| } | ||
|
|
||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.