| /* |
| * 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.cassandra.db.compaction; |
| |
| import java.util.AbstractCollection; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.stream.Collectors; |
| |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| public class CompactionTasks extends AbstractCollection<AbstractCompactionTask> implements AutoCloseable |
| { |
| @SuppressWarnings("resource") |
| private static final CompactionTasks EMPTY = new CompactionTasks(Collections.emptyList()); |
| |
| private final Collection<AbstractCompactionTask> tasks; |
| |
| private CompactionTasks(Collection<AbstractCompactionTask> tasks) |
| { |
| this.tasks = tasks; |
| } |
| |
| public static CompactionTasks create(Collection<AbstractCompactionTask> tasks) |
| { |
| if (tasks == null || tasks.isEmpty()) |
| return EMPTY; |
| return new CompactionTasks(tasks); |
| } |
| |
| public static CompactionTasks empty() |
| { |
| return EMPTY; |
| } |
| |
| public Iterator<AbstractCompactionTask> iterator() |
| { |
| return tasks.iterator(); |
| } |
| |
| public int size() |
| { |
| return tasks.size(); |
| } |
| |
| public void close() |
| { |
| try |
| { |
| FBUtilities.closeAll(tasks.stream().map(task -> task.transaction).collect(Collectors.toList())); |
| } |
| catch (Exception e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| } |