| /* |
| * 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.hadoop.fs.ozone; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.StorageStatistics; |
| import org.apache.hadoop.ozone.OzoneConsts; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.EnumMap; |
| import java.util.Collections; |
| import java.util.NoSuchElementException; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * Storage statistics for OzoneFileSystem. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class OzoneFSStorageStatistics extends StorageStatistics |
| implements Iterable<StorageStatistics.LongStatistic> { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(OzoneFSStorageStatistics.class); |
| |
| public static final String NAME = "OzoneFSStorageStatistics"; |
| private final Map<Statistic, AtomicLong> opsCount = |
| new EnumMap<>(Statistic.class); |
| |
| public OzoneFSStorageStatistics() { |
| super(NAME); |
| for (Statistic opType : Statistic.values()) { |
| opsCount.put(opType, new AtomicLong(0)); |
| } |
| } |
| |
| /** |
| * Increment a specific counter. |
| * @param op operation |
| * @param count increment value |
| * @return the new value |
| */ |
| public long incrementCounter(Statistic op, long count) { |
| long updated = opsCount.get(op).addAndGet(count); |
| LOG.debug("{} += {} -> {}", op, count, updated); |
| return updated; |
| } |
| |
| private class LongIterator implements Iterator<LongStatistic> { |
| private Iterator<Map.Entry<Statistic, AtomicLong>> iterator = |
| Collections.unmodifiableSet(opsCount.entrySet()).iterator(); |
| |
| @Override |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| @Override |
| public LongStatistic next() { |
| if (!iterator.hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| final Map.Entry<Statistic, AtomicLong> entry = iterator.next(); |
| return new LongStatistic(entry.getKey().getSymbol(), |
| entry.getValue().get()); |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| @Override |
| public String getScheme() { |
| return OzoneConsts.OZONE_URI_SCHEME; |
| } |
| |
| @Override |
| public Iterator<LongStatistic> getLongStatistics() { |
| return new LongIterator(); |
| } |
| |
| @Override |
| public Iterator<LongStatistic> iterator() { |
| return getLongStatistics(); |
| } |
| |
| @Override |
| public Long getLong(String key) { |
| final Statistic type = Statistic.fromSymbol(key); |
| return type == null ? null : opsCount.get(type).get(); |
| } |
| |
| @Override |
| public boolean isTracked(String key) { |
| return Statistic.fromSymbol(key) != null; |
| } |
| |
| @Override |
| public void reset() { |
| for (AtomicLong value : opsCount.values()) { |
| value.set(0); |
| } |
| } |
| |
| } |