| /** |
| * 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.distributedlog.service; |
| |
| import com.google.common.base.Stopwatch; |
| import com.twitter.finagle.Service; |
| import com.twitter.finagle.SimpleFilter; |
| import com.twitter.util.Future; |
| import java.util.concurrent.TimeUnit; |
| import org.apache.bookkeeper.stats.Counter; |
| import org.apache.bookkeeper.stats.OpStatsLogger; |
| import org.apache.bookkeeper.stats.StatsLogger; |
| |
| /** |
| * Track distributedlog server finagle-service stats. |
| */ |
| class StatsFilter<Req, Rep> extends SimpleFilter<Req, Rep> { |
| |
| private final StatsLogger stats; |
| private final Counter outstandingAsync; |
| private final OpStatsLogger serviceExec; |
| |
| @Override |
| public Future<Rep> apply(Req req, Service<Req, Rep> service) { |
| Future<Rep> result = null; |
| outstandingAsync.inc(); |
| final Stopwatch stopwatch = Stopwatch.createStarted(); |
| try { |
| result = service.apply(req); |
| serviceExec.registerSuccessfulEvent( |
| stopwatch.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS); |
| } finally { |
| outstandingAsync.dec(); |
| if (null == result) { |
| serviceExec.registerFailedEvent( |
| stopwatch.stop().elapsed(TimeUnit.MICROSECONDS), TimeUnit.MICROSECONDS); |
| } |
| } |
| return result; |
| } |
| |
| public StatsFilter(StatsLogger stats) { |
| this.stats = stats; |
| this.outstandingAsync = stats.getCounter("outstandingAsync"); |
| this.serviceExec = stats.getOpStatsLogger("serviceExec"); |
| } |
| } |