| /* |
| * 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.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.IdentityHashMap; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| |
| public class ActiveCompactions implements ActiveCompactionsTracker |
| { |
| // a synchronized identity set of running tasks to their compaction info |
| private final Set<CompactionInfo.Holder> compactions = Collections.synchronizedSet(Collections.newSetFromMap(new IdentityHashMap<>())); |
| |
| public List<CompactionInfo.Holder> getCompactions() |
| { |
| return new ArrayList<>(compactions); |
| } |
| |
| public void beginCompaction(CompactionInfo.Holder ci) |
| { |
| compactions.add(ci); |
| } |
| |
| public void finishCompaction(CompactionInfo.Holder ci) |
| { |
| compactions.remove(ci); |
| CompactionManager.instance.getMetrics().bytesCompacted.inc(ci.getCompactionInfo().getTotal()); |
| CompactionManager.instance.getMetrics().totalCompactionsCompleted.mark(); |
| } |
| |
| /** |
| * Iterates over the active compactions and tries to find CompactionInfos with the given compactionType for the given sstable |
| * |
| * Number of entries in compactions should be small (< 10) but avoid calling in any time-sensitive context |
| */ |
| public Collection<CompactionInfo> getCompactionsForSSTable(SSTableReader sstable, OperationType compactionType) |
| { |
| List<CompactionInfo> toReturn = null; |
| synchronized (compactions) |
| { |
| for (CompactionInfo.Holder holder : compactions) |
| { |
| CompactionInfo compactionInfo = holder.getCompactionInfo(); |
| if (compactionInfo.getSSTables().contains(sstable) && compactionInfo.getTaskType() == compactionType) |
| { |
| if (toReturn == null) |
| toReturn = new ArrayList<>(); |
| toReturn.add(compactionInfo); |
| } |
| } |
| } |
| return toReturn; |
| } |
| } |