Ethanlm commented on a change in pull request #3307: URL: https://github.com/apache/storm/pull/3307#discussion_r467953300
########## File path: storm-client/src/jvm/org/apache/storm/metrics2/WindowedHistogram.java ########## @@ -1,38 +1,31 @@ -/* - * 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 +/** + * 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. + * 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.storm.metric.internal; +package org.apache.storm.metrics2; +import com.codahale.metrics.Histogram; import java.util.HashMap; import java.util.Map; import java.util.TimerTask; -import org.apache.storm.metric.api.IMetric; +import org.apache.storm.metric.internal.MetricStatTimer; +import org.apache.storm.utils.Time; import org.apache.storm.utils.Utils; /** - * Acts as a Latency Metric, but also keeps track of approximate latency for the last 10 mins, 3 hours, 1 day, and all time. + * Acts as a Histogram, but keeps track of approximate counts for the last 10 mins, 3 hours, 1 day, and all time. */ -public class LatencyStatAndMetric implements IMetric { - //The current lat and count buckets are protected by a different lock Review comment: I can see this separate currentLock can reduce lock contention. Otherwise `record` method might be blocked for too long by other methods https://github.com/apache/storm/blob/master/storm-client/src/jvm/org/apache/storm/metric/internal/LatencyStatAndMetric.java#L119-L123 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
