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Use DataTypeRegistry to cache date type load and reuse in different s…
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...pache/shardingsphere/infra/database/core/metadata/database/datatype/DataTypeRegistry.java
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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.shardingsphere.infra.database.core.metadata.database.datatype; | ||
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| import com.cedarsoftware.util.CaseInsensitiveMap; | ||
| import lombok.AccessLevel; | ||
| import lombok.NoArgsConstructor; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.apache.shardingsphere.infra.database.core.type.DatabaseType; | ||
| import org.apache.shardingsphere.infra.exception.core.external.sql.type.wrapper.SQLWrapperException; | ||
| import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader; | ||
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| import javax.sql.DataSource; | ||
| import java.sql.Connection; | ||
| import java.sql.DatabaseMetaData; | ||
| import java.sql.SQLException; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
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|
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| /** | ||
| * Data type registry. | ||
| */ | ||
| @NoArgsConstructor(access = AccessLevel.PRIVATE) | ||
| @Slf4j | ||
| public final class DataTypeRegistry { | ||
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| private static final Map<String, Map<String, Integer>> DATA_TYPES = new ConcurrentHashMap<>(); | ||
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| /** | ||
| * Load data types. | ||
| * | ||
| * @param dataSource data source to be loaded | ||
| * @param databaseType database type | ||
| * @throws SQLWrapperException SQL wrapper exception | ||
| */ | ||
| public static void load(final DataSource dataSource, final String databaseType) { | ||
| try (Connection connection = dataSource.getConnection()) { | ||
| DatabaseMetaData databaseMetaData = connection.getMetaData(); | ||
| if (!DATA_TYPES.containsKey(databaseType)) { | ||
| DATA_TYPES.put(databaseType, new CaseInsensitiveMap<>(new DataTypeLoader().load(databaseMetaData, TypedSPILoader.getService(DatabaseType.class, databaseType)))); | ||
| } | ||
| } catch (final SQLException ex) { | ||
| throw new SQLWrapperException(ex); | ||
| } | ||
| } | ||
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| /** | ||
| * Get data type. | ||
| * | ||
| * @param databaseType database type | ||
| * @param dataTypeName data type name | ||
| * @return data type | ||
| */ | ||
| public static Optional<Integer> getDataType(final String databaseType, final String dataTypeName) { | ||
| if (!DATA_TYPES.containsKey(databaseType)) { | ||
| return Optional.empty(); | ||
| } | ||
| if (!DATA_TYPES.get(databaseType).containsKey(dataTypeName)) { | ||
| log.warn("Cannot find data type: {}.", dataTypeName); | ||
| return Optional.empty(); | ||
| } | ||
| return Optional.of(DATA_TYPES.get(databaseType).get(dataTypeName)); | ||
| } | ||
| } |
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