| /* |
| * 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 |
| * |
| * https://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.avro.ipc.stats; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.TreeSet; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.avro.Protocol.Message; |
| import org.apache.avro.ipc.RPCContext; |
| import org.apache.avro.ipc.RPCPlugin; |
| import org.apache.avro.ipc.stats.Histogram.Segmenter; |
| import org.apache.avro.ipc.stats.Stopwatch.Ticks; |
| |
| /** |
| * Collects count and latency statistics about RPC calls. Keeps data for every |
| * method. Can be added to a Requestor (client) or Responder (server). |
| * |
| * This uses milliseconds as the standard unit of measure throughout the class, |
| * stored in floats. |
| */ |
| public class StatsPlugin extends RPCPlugin { |
| /** Static declaration of histogram buckets. */ |
| public static final Segmenter<String, Float> LATENCY_SEGMENTER = new Histogram.TreeMapSegmenter<>( |
| new TreeSet<>(Arrays.asList(0f, 25f, 50f, 75f, 100f, 200f, 300f, 500f, 750f, 1000f, // 1 second |
| 2000f, 5000f, 10000f, 60000f, // 1 minute |
| 600000f))); |
| |
| public static final Segmenter<String, Integer> PAYLOAD_SEGMENTER = new Histogram.TreeMapSegmenter<>( |
| new TreeSet<>(Arrays.asList(0, 25, 50, 75, 100, 200, 300, 500, 750, 1000, // 1 k |
| 2000, 5000, 10000, 50000, 100000))); |
| |
| /** |
| * Per-method histograms. Must be accessed while holding a lock. |
| */ |
| Map<Message, FloatHistogram<?>> methodTimings = new HashMap<>(); |
| |
| Map<Message, IntegerHistogram<?>> sendPayloads = new HashMap<>(); |
| |
| Map<Message, IntegerHistogram<?>> receivePayloads = new HashMap<>(); |
| |
| /** RPCs in flight. */ |
| ConcurrentMap<RPCContext, Stopwatch> activeRpcs = new ConcurrentHashMap<>(); |
| private Ticks ticks; |
| |
| /** How long I've been alive */ |
| public Date startupTime = new Date(); |
| |
| private Segmenter<?, Float> floatSegmenter; |
| private Segmenter<?, Integer> integerSegmenter; |
| |
| /** Construct a plugin with custom Ticks and Segmenter implementations. */ |
| public StatsPlugin(Ticks ticks, Segmenter<?, Float> floatSegmenter, Segmenter<?, Integer> integerSegmenter) { |
| this.floatSegmenter = floatSegmenter; |
| this.integerSegmenter = integerSegmenter; |
| this.ticks = ticks; |
| } |
| |
| /** |
| * Construct a plugin with default (system) ticks, and default histogram |
| * segmentation. |
| */ |
| public StatsPlugin() { |
| this(Stopwatch.SYSTEM_TICKS, LATENCY_SEGMENTER, PAYLOAD_SEGMENTER); |
| } |
| |
| /** |
| * Helper to get the size of an RPC payload. |
| */ |
| private int getPayloadSize(List<ByteBuffer> payload) { |
| if (payload == null) { |
| return 0; |
| } |
| |
| int size = 0; |
| for (ByteBuffer bb : payload) { |
| size = size + bb.limit(); |
| } |
| |
| return size; |
| } |
| |
| @Override |
| public void serverReceiveRequest(RPCContext context) { |
| Stopwatch t = new Stopwatch(ticks); |
| t.start(); |
| this.activeRpcs.put(context, t); |
| |
| synchronized (receivePayloads) { |
| IntegerHistogram<?> h = receivePayloads.get(context.getMessage()); |
| if (h == null) { |
| h = createNewIntegerHistogram(); |
| receivePayloads.put(context.getMessage(), h); |
| } |
| h.add(getPayloadSize(context.getRequestPayload())); |
| } |
| } |
| |
| @Override |
| public void serverSendResponse(RPCContext context) { |
| Stopwatch t = this.activeRpcs.remove(context); |
| t.stop(); |
| publish(context, t); |
| |
| synchronized (sendPayloads) { |
| IntegerHistogram<?> h = sendPayloads.get(context.getMessage()); |
| if (h == null) { |
| h = createNewIntegerHistogram(); |
| sendPayloads.put(context.getMessage(), h); |
| } |
| h.add(getPayloadSize(context.getResponsePayload())); |
| } |
| } |
| |
| @Override |
| public void clientSendRequest(RPCContext context) { |
| Stopwatch t = new Stopwatch(ticks); |
| t.start(); |
| this.activeRpcs.put(context, t); |
| |
| synchronized (sendPayloads) { |
| IntegerHistogram<?> h = sendPayloads.get(context.getMessage()); |
| if (h == null) { |
| h = createNewIntegerHistogram(); |
| sendPayloads.put(context.getMessage(), h); |
| } |
| h.add(getPayloadSize(context.getRequestPayload())); |
| } |
| } |
| |
| @Override |
| public void clientReceiveResponse(RPCContext context) { |
| Stopwatch t = this.activeRpcs.remove(context); |
| t.stop(); |
| publish(context, t); |
| |
| synchronized (receivePayloads) { |
| IntegerHistogram<?> h = receivePayloads.get(context.getMessage()); |
| if (h == null) { |
| h = createNewIntegerHistogram(); |
| receivePayloads.put(context.getMessage(), h); |
| } |
| h.add(getPayloadSize(context.getRequestPayload())); |
| } |
| } |
| |
| /** Adds timing to the histograms. */ |
| private void publish(RPCContext context, Stopwatch t) { |
| Message message = context.getMessage(); |
| if (message == null) |
| throw new IllegalArgumentException(); |
| synchronized (methodTimings) { |
| FloatHistogram<?> h = methodTimings.get(context.getMessage()); |
| if (h == null) { |
| h = createNewFloatHistogram(); |
| methodTimings.put(context.getMessage(), h); |
| } |
| h.add(nanosToMillis(t.elapsedNanos())); |
| } |
| } |
| |
| private FloatHistogram<?> createNewFloatHistogram() { |
| return new FloatHistogram<>(floatSegmenter); |
| } |
| |
| private IntegerHistogram<?> createNewIntegerHistogram() { |
| return new IntegerHistogram<>(integerSegmenter); |
| } |
| |
| /** Converts nanoseconds to milliseconds. */ |
| static float nanosToMillis(long elapsedNanos) { |
| return elapsedNanos / 1000000.0f; |
| } |
| } |