| /* |
| * 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.metrics; |
| |
| import java.util.Map.Entry; |
| |
| import com.codahale.metrics.Counter; |
| import com.github.benmanes.caffeine.cache.Caffeine; |
| import com.github.benmanes.caffeine.cache.LoadingCache; |
| |
| import org.apache.cassandra.concurrent.ImmediateExecutor; |
| import org.apache.cassandra.db.SystemKeyspace; |
| import org.apache.cassandra.locator.InetAddressAndPort; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics; |
| import static org.apache.cassandra.utils.TimeUUID.Generator.nextTimeUUID; |
| |
| /** |
| * Metrics for {@link org.apache.cassandra.hints.HintsService}. |
| */ |
| public class HintedHandoffMetrics |
| { |
| private static final Logger logger = LoggerFactory.getLogger(HintedHandoffMetrics.class); |
| |
| private static final MetricNameFactory factory = new DefaultNameFactory("HintsService"); |
| |
| /** Total number of hints which are not stored, This is not a cache. */ |
| private final LoadingCache<InetAddressAndPort, DifferencingCounter> notStored = Caffeine.newBuilder() |
| .executor(ImmediateExecutor.INSTANCE) |
| .build(DifferencingCounter::new); |
| |
| /** Total number of hints that have been created, This is not a cache. */ |
| private final LoadingCache<InetAddressAndPort, Counter> createdHintCounts = Caffeine.newBuilder() |
| .executor(ImmediateExecutor.INSTANCE) |
| .build(address -> Metrics.counter(factory.createMetricName("Hints_created-" + address.toString().replace(':', '.')))); |
| |
| public void incrCreatedHints(InetAddressAndPort address) |
| { |
| createdHintCounts.get(address).inc(); |
| } |
| |
| public void incrPastWindow(InetAddressAndPort address) |
| { |
| notStored.get(address).mark(); |
| } |
| |
| public void log() |
| { |
| for (Entry<InetAddressAndPort, DifferencingCounter> entry : notStored.asMap().entrySet()) |
| { |
| long difference = entry.getValue().difference(); |
| if (difference == 0) |
| continue; |
| logger.warn("{} has {} dropped hints, because node is down past configured hint window.", entry.getKey(), difference); |
| SystemKeyspace.updateHintsDropped(entry.getKey(), nextTimeUUID(), (int) difference); |
| } |
| } |
| |
| public static class DifferencingCounter |
| { |
| private final Counter meter; |
| private long reported = 0; |
| |
| public DifferencingCounter(InetAddressAndPort address) |
| { |
| //This changes the name of the metric, people can update their monitoring when upgrading? |
| this.meter = Metrics.counter(factory.createMetricName("Hints_not_stored-" + address.toString().replace(':', '.'))); |
| } |
| |
| public long difference() |
| { |
| long current = meter.getCount(); |
| long difference = current - reported; |
| this.reported = current; |
| return difference; |
| } |
| |
| public long count() |
| { |
| return meter.getCount(); |
| } |
| |
| public void mark() |
| { |
| meter.inc(); |
| } |
| } |
| } |