| /* |
| * 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. |
| */ |
| |
| package org.apache.shardingsphere.metadata.persist.service.config; |
| |
| import lombok.RequiredArgsConstructor; |
| import org.apache.shardingsphere.infra.util.yaml.datanode.RepositoryTuple; |
| import org.apache.shardingsphere.mode.spi.PersistRepository; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashSet; |
| import java.util.regex.Pattern; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Repository tuple persist service. |
| */ |
| @RequiredArgsConstructor |
| public final class RepositoryTuplePersistService { |
| |
| private static final String ACTIVE_VERSION_PATTERN = "/active_version$"; |
| |
| private static final String ACTIVE_VERSION_PATH = "active_version"; |
| |
| private static final String VERSIONS_PATH = "versions"; |
| |
| private final PersistRepository repository; |
| |
| /** |
| * Load repository tuples. |
| * |
| * @param rootNode root node |
| * @return loaded repository tuples |
| */ |
| public Collection<RepositoryTuple> loadRepositoryTuples(final String rootNode) { |
| Pattern pattern = Pattern.compile(ACTIVE_VERSION_PATTERN, Pattern.CASE_INSENSITIVE); |
| return loadNodes(rootNode).stream().filter(each -> pattern.matcher(each).find()).map(this::getRepositoryTuple).collect(Collectors.toList()); |
| } |
| |
| private Collection<String> loadNodes(final String rootNode) { |
| Collection<String> result = new LinkedHashSet<>(); |
| loadNodes(rootNode, result); |
| if (1 == result.size()) { |
| return Collections.emptyList(); |
| } |
| return result; |
| } |
| |
| private void loadNodes(final String toBeLoadedNode, final Collection<String> loadedNodes) { |
| loadedNodes.add(toBeLoadedNode); |
| for (String each : repository.getChildrenKeys(toBeLoadedNode)) { |
| loadNodes(String.join("/", toBeLoadedNode, each), loadedNodes); |
| } |
| } |
| |
| private RepositoryTuple getRepositoryTuple(final String node) { |
| String activeRuleKey = node.replace(ACTIVE_VERSION_PATH, VERSIONS_PATH) + "/" + repository.getDirectly(node); |
| return new RepositoryTuple(activeRuleKey, repository.getDirectly(activeRuleKey)); |
| } |
| } |