| /* |
| * 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.pulsar.common.naming; |
| |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.stream.Collectors; |
| import org.apache.pulsar.broker.namespace.NamespaceService; |
| |
| /** |
| * This algorithm divides the bundle into several parts by the specified positions. |
| */ |
| public class SpecifiedPositionsBundleSplitAlgorithm implements NamespaceBundleSplitAlgorithm{ |
| |
| private boolean force; |
| |
| public SpecifiedPositionsBundleSplitAlgorithm() { |
| force = false; |
| } |
| |
| public SpecifiedPositionsBundleSplitAlgorithm(boolean force) { |
| this.force = force; |
| } |
| @Override |
| public CompletableFuture<List<Long>> getSplitBoundary(BundleSplitOption bundleSplitOption) { |
| NamespaceService service = bundleSplitOption.getService(); |
| NamespaceBundle bundle = bundleSplitOption.getBundle(); |
| List<Long> positions = bundleSplitOption.getPositions(); |
| if (positions == null || positions.size() == 0) { |
| throw new IllegalArgumentException("SplitBoundaries can't be empty"); |
| } |
| // sort all positions |
| Collections.sort(positions); |
| if (force) { |
| return getBoundaries(bundle, positions); |
| } else { |
| return service.getOwnedTopicListForNamespaceBundle(bundle) |
| .thenCompose(topics -> { |
| if (topics == null || topics.size() <= 1) { |
| return CompletableFuture.completedFuture(null); |
| } |
| return getBoundaries(bundle, positions); |
| }); |
| } |
| } |
| |
| private CompletableFuture<List<Long>> getBoundaries(NamespaceBundle bundle, List<Long> positions) { |
| List<Long> splitBoundaries = positions |
| .stream() |
| .filter(position -> position > bundle.getLowerEndpoint() && position < bundle.getUpperEndpoint()) |
| .collect(Collectors.toList()); |
| |
| if (splitBoundaries.size() == 0) { |
| return CompletableFuture.completedFuture(null); |
| } |
| return CompletableFuture.completedFuture(splitBoundaries); |
| } |
| } |