apoorvmittal10 commented on code in PR #14699: URL: https://github.com/apache/kafka/pull/14699#discussion_r1382109647
########## core/src/main/java/kafka/server/ClientMetricsManager.java: ########## @@ -0,0 +1,416 @@ +/* + * 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 kafka.server; + +import java.util.Collections; +import java.util.regex.Pattern; +import kafka.metrics.ClientMetricsConfigs; +import kafka.metrics.ClientMetricsInstance; +import kafka.metrics.ClientMetricsInstanceMetadata; +import kafka.metrics.ClientMetricsReceiverPlugin; + +import org.apache.kafka.common.Uuid; +import org.apache.kafka.common.cache.Cache; +import org.apache.kafka.common.cache.LRUCache; +import org.apache.kafka.common.cache.SynchronizedCache; +import org.apache.kafka.common.errors.ApiException; +import org.apache.kafka.common.errors.InvalidRequestException; +import org.apache.kafka.common.errors.TelemetryTooLargeException; +import org.apache.kafka.common.errors.ThrottlingQuotaExceededException; +import org.apache.kafka.common.errors.UnknownSubscriptionIdException; +import org.apache.kafka.common.errors.UnsupportedCompressionTypeException; +import org.apache.kafka.common.message.GetTelemetrySubscriptionsResponseData; +import org.apache.kafka.common.protocol.Errors; +import org.apache.kafka.common.record.CompressionType; +import org.apache.kafka.common.requests.GetTelemetrySubscriptionsRequest; +import org.apache.kafka.common.requests.GetTelemetrySubscriptionsResponse; +import org.apache.kafka.common.requests.PushTelemetryRequest; +import org.apache.kafka.common.requests.PushTelemetryResponse; +import org.apache.kafka.common.requests.RequestContext; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.Closeable; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.Properties; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.zip.CRC32; + +/** + * Handles client telemetry metrics requests/responses, subscriptions and instance information. + */ +public class ClientMetricsManager implements Closeable { + + private static final Logger log = LoggerFactory.getLogger(ClientMetricsManager.class); + private static final ClientMetricsManager INSTANCE = new ClientMetricsManager(); + + public static ClientMetricsManager instance() { + return INSTANCE; + } + // Max cache size (16k active client connections per broker) + private static final int CM_CACHE_MAX_SIZE = 16384; + private final Cache<Uuid, ClientMetricsInstance> clientInstanceCache; Review Comment: The KIP-714 says: `This client instance specific state is maintained in broker memory up to MAX(60*1000, PushIntervalMs * 3) milliseconds and is used to enforce the push interval rate-limiting. There is no persistence of client instance metrics state across broker restarts or between brokers.` I have started with LRUCache with oldest entry eviction but will implement something similar to `Selector.IdleExpiryManager` which cleansup old connections. -- 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. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
