| /** |
| * 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 com.twitter.distributedlog.client.stats; |
| |
| import com.twitter.finagle.stats.Counter; |
| import com.twitter.finagle.stats.StatsReceiver; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| /** |
| * Stats Logger for ownerships. |
| */ |
| public class OwnershipStatsLogger { |
| |
| /** |
| * Ownership related stats. |
| */ |
| public static class OwnershipStat { |
| private final Counter hits; |
| private final Counter misses; |
| private final Counter removes; |
| private final Counter redirects; |
| private final Counter adds; |
| |
| OwnershipStat(StatsReceiver ownershipStats) { |
| hits = ownershipStats.counter0("hits"); |
| misses = ownershipStats.counter0("misses"); |
| adds = ownershipStats.counter0("adds"); |
| removes = ownershipStats.counter0("removes"); |
| redirects = ownershipStats.counter0("redirects"); |
| } |
| |
| public void onHit() { |
| hits.incr(); |
| } |
| |
| public void onMiss() { |
| misses.incr(); |
| } |
| |
| public void onAdd() { |
| adds.incr(); |
| } |
| |
| public void onRemove() { |
| removes.incr(); |
| } |
| |
| public void onRedirect() { |
| redirects.incr(); |
| } |
| |
| } |
| |
| private final OwnershipStat ownershipStat; |
| private final StatsReceiver ownershipStatsReceiver; |
| private final ConcurrentMap<String, OwnershipStat> ownershipStats = |
| new ConcurrentHashMap<String, OwnershipStat>(); |
| |
| public OwnershipStatsLogger(StatsReceiver statsReceiver, |
| StatsReceiver streamStatsReceiver) { |
| this.ownershipStat = new OwnershipStat(statsReceiver.scope("ownership")); |
| this.ownershipStatsReceiver = streamStatsReceiver.scope("perstream_ownership"); |
| } |
| |
| private OwnershipStat getOwnershipStat(String stream) { |
| OwnershipStat stat = ownershipStats.get(stream); |
| if (null == stat) { |
| OwnershipStat newStat = new OwnershipStat(ownershipStatsReceiver.scope(stream)); |
| OwnershipStat oldStat = ownershipStats.putIfAbsent(stream, newStat); |
| stat = null != oldStat ? oldStat : newStat; |
| } |
| return stat; |
| } |
| |
| public void onMiss(String stream) { |
| ownershipStat.onMiss(); |
| getOwnershipStat(stream).onMiss(); |
| } |
| |
| public void onHit(String stream) { |
| ownershipStat.onHit(); |
| getOwnershipStat(stream).onHit(); |
| } |
| |
| public void onRedirect(String stream) { |
| ownershipStat.onRedirect(); |
| getOwnershipStat(stream).onRedirect(); |
| } |
| |
| public void onRemove(String stream) { |
| ownershipStat.onRemove(); |
| getOwnershipStat(stream).onRemove(); |
| } |
| |
| public void onAdd(String stream) { |
| ownershipStat.onAdd(); |
| getOwnershipStat(stream).onAdd(); |
| } |
| } |