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Add ShadowTableHintDataSourceMappingsRetriever
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...hardingsphere/shadow/route/retriever/hint/ShadowTableHintDataSourceMappingsRetriever.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.shadow.route.retriever.hint; | ||
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| import lombok.RequiredArgsConstructor; | ||
| import org.apache.shardingsphere.infra.annotation.HighFrequencyInvocation; | ||
| import org.apache.shardingsphere.shadow.condition.ShadowCondition; | ||
| import org.apache.shardingsphere.shadow.route.determiner.HintShadowAlgorithmDeterminer; | ||
| import org.apache.shardingsphere.shadow.route.retriever.ShadowDataSourceMappingsRetriever; | ||
| import org.apache.shardingsphere.shadow.rule.ShadowRule; | ||
| import org.apache.shardingsphere.shadow.spi.ShadowAlgorithm; | ||
| import org.apache.shardingsphere.shadow.spi.ShadowOperationType; | ||
| import org.apache.shardingsphere.shadow.spi.hint.HintShadowAlgorithm; | ||
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| import java.util.Collection; | ||
| import java.util.Collections; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
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| /** | ||
| * Shadow table hint data source mappings retriever. | ||
| */ | ||
| @HighFrequencyInvocation | ||
| @RequiredArgsConstructor | ||
| public final class ShadowTableHintDataSourceMappingsRetriever implements ShadowDataSourceMappingsRetriever { | ||
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| private final ShadowOperationType operationType; | ||
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| private final boolean isShadow; | ||
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| private final Map<String, String> tableAliasAndNameMappings; | ||
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| @Override | ||
| public Map<String, String> retrieve(final ShadowRule rule) { | ||
| Collection<String> shadowTables = rule.filterShadowTables(tableAliasAndNameMappings.values()); | ||
| return shadowTables.isEmpty() && isMatchDefaultAlgorithm(rule) ? rule.getAllShadowDataSourceMappings() : findShadowDataSourceMappingsBySQLHints(rule, shadowTables); | ||
| } | ||
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| @SuppressWarnings("unchecked") | ||
| private boolean isMatchDefaultAlgorithm(final ShadowRule rule) { | ||
| Optional<ShadowAlgorithm> defaultAlgorithm = rule.getDefaultShadowAlgorithm(); | ||
| if (defaultAlgorithm.isPresent() && defaultAlgorithm.get() instanceof HintShadowAlgorithm<?>) { | ||
| return HintShadowAlgorithmDeterminer.isShadow((HintShadowAlgorithm<Comparable<?>>) defaultAlgorithm.get(), new ShadowCondition(), rule, isShadow); | ||
| } | ||
| return false; | ||
| } | ||
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| private Map<String, String> findShadowDataSourceMappingsBySQLHints(final ShadowRule rule, final Collection<String> shadowTables) { | ||
| for (String each : shadowTables) { | ||
| if (containsShadowInSQLHints(rule, each, new ShadowCondition(each, operationType))) { | ||
| return rule.getShadowDataSourceMappings(each); | ||
| } | ||
| } | ||
| return Collections.emptyMap(); | ||
| } | ||
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| private boolean containsShadowInSQLHints(final ShadowRule rule, final String tableName, final ShadowCondition shadowCondition) { | ||
| for (HintShadowAlgorithm<Comparable<?>> each : rule.getHintShadowAlgorithms(tableName)) { | ||
| if (HintShadowAlgorithmDeterminer.isShadow(each, shadowCondition, rule, isShadow)) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
| } |