| /** |
| * 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.pulsar.broker.resourcegroup; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import org.apache.pulsar.broker.resourcegroup.ResourceGroup.BytesAndMessagesCount; |
| import org.apache.pulsar.broker.service.PublishRateLimiter; |
| import org.apache.pulsar.common.policies.data.Policies; |
| import org.apache.pulsar.common.policies.data.PublishRate; |
| import org.apache.pulsar.common.policies.data.ResourceGroup; |
| import org.apache.pulsar.common.util.RateLimitFunction; |
| import org.apache.pulsar.common.util.RateLimiter; |
| |
| public class ResourceGroupPublishLimiter implements PublishRateLimiter, RateLimitFunction, AutoCloseable { |
| protected volatile long publishMaxMessageRate = 0; |
| protected volatile long publishMaxByteRate = 0; |
| protected volatile boolean publishThrottlingEnabled = false; |
| private volatile RateLimiter publishRateLimiterOnMessage; |
| private volatile RateLimiter publishRateLimiterOnByte; |
| private final ScheduledExecutorService scheduledExecutorService; |
| |
| ConcurrentHashMap<String, RateLimitFunction> rateLimitFunctionMap = new ConcurrentHashMap<>(); |
| |
| public ResourceGroupPublishLimiter(ResourceGroup resourceGroup, ScheduledExecutorService scheduledExecutorService) { |
| this.scheduledExecutorService = scheduledExecutorService; |
| update(resourceGroup); |
| } |
| |
| @Override |
| public void checkPublishRate() { |
| // No-op |
| } |
| |
| @Override |
| public void incrementPublishCount(int numOfMessages, long msgSizeInBytes) { |
| // No-op |
| } |
| |
| @Override |
| public boolean resetPublishCount() { |
| return true; |
| } |
| |
| @Override |
| public boolean isPublishRateExceeded() { |
| return false; |
| } |
| |
| @Override |
| public void update(Policies policies, String clusterName) { |
| // No-op |
| } |
| |
| @Override |
| public void update(PublishRate maxPublishRate) { |
| // No-op |
| } |
| |
| public void update(BytesAndMessagesCount maxPublishRate) { |
| update(maxPublishRate.messages, maxPublishRate.bytes); |
| } |
| |
| public BytesAndMessagesCount getResourceGroupPublishValues() { |
| BytesAndMessagesCount bmc = new BytesAndMessagesCount(); |
| bmc.bytes = this.publishMaxByteRate; |
| bmc.messages = this.publishMaxMessageRate; |
| return bmc; |
| } |
| |
| public void update(ResourceGroup resourceGroup) { |
| long publishRateInMsgs = 0, publishRateInBytes = 0; |
| if (resourceGroup != null) { |
| publishRateInBytes = resourceGroup.getPublishRateInBytes() == null |
| ? -1 : resourceGroup.getPublishRateInBytes(); |
| publishRateInMsgs = resourceGroup.getPublishRateInMsgs() == null |
| ? -1 : resourceGroup.getPublishRateInMsgs(); |
| } |
| |
| update(publishRateInMsgs, publishRateInBytes); |
| } |
| |
| public void update(long publishRateInMsgs, long publishRateInBytes) { |
| replaceLimiters(() -> { |
| if (publishRateInMsgs > 0 || publishRateInBytes > 0) { |
| this.publishThrottlingEnabled = true; |
| this.publishMaxMessageRate = Math.max(publishRateInMsgs, 0); |
| this.publishMaxByteRate = Math.max(publishRateInBytes, 0); |
| if (this.publishMaxMessageRate > 0) { |
| publishRateLimiterOnMessage = RateLimiter.builder() |
| .scheduledExecutorService(scheduledExecutorService) |
| .permits(publishMaxMessageRate) |
| .rateTime(1L) |
| .timeUnit(TimeUnit.SECONDS) |
| .rateLimitFunction(this::apply) |
| .build(); |
| } |
| if (this.publishMaxByteRate > 0) { |
| publishRateLimiterOnByte = |
| RateLimiter.builder() |
| .scheduledExecutorService(scheduledExecutorService) |
| .permits(publishMaxByteRate) |
| .rateTime(1L) |
| .timeUnit(TimeUnit.SECONDS) |
| .rateLimitFunction(this::apply) |
| .build(); |
| } |
| } else { |
| this.publishMaxMessageRate = 0; |
| this.publishMaxByteRate = 0; |
| this.publishThrottlingEnabled = false; |
| publishRateLimiterOnMessage = null; |
| publishRateLimiterOnByte = null; |
| } |
| }); |
| } |
| |
| public boolean tryAcquire(int numbers, long bytes) { |
| return (publishRateLimiterOnMessage == null || publishRateLimiterOnMessage.tryAcquire(numbers)) |
| && (publishRateLimiterOnByte == null || publishRateLimiterOnByte.tryAcquire(bytes)); |
| } |
| |
| public void registerRateLimitFunction(String name, RateLimitFunction func) { |
| rateLimitFunctionMap.put(name, func); |
| } |
| |
| public void unregisterRateLimitFunction(String name) { |
| rateLimitFunctionMap.remove(name); |
| } |
| |
| private void replaceLimiters(Runnable updater) { |
| RateLimiter previousPublishRateLimiterOnMessage = publishRateLimiterOnMessage; |
| publishRateLimiterOnMessage = null; |
| RateLimiter previousPublishRateLimiterOnByte = publishRateLimiterOnByte; |
| publishRateLimiterOnByte = null; |
| try { |
| if (updater != null) { |
| updater.run(); |
| } |
| } finally { |
| // Close previous limiters to prevent resource leakages. |
| // Delay closing of previous limiters after new ones are in place so that updating the limiter |
| // doesn't cause unavailability. |
| if (previousPublishRateLimiterOnMessage != null) { |
| previousPublishRateLimiterOnMessage.close(); |
| } |
| if (previousPublishRateLimiterOnByte != null) { |
| previousPublishRateLimiterOnByte.close(); |
| } |
| } |
| } |
| |
| @Override |
| public void close() { |
| // Unblock any producers, consumers waiting first. |
| // This needs to be done before replacing the filters to null |
| this.apply(); |
| replaceLimiters(null); |
| } |
| |
| @Override |
| public void apply() { |
| // Make sure that both the rate limiters are applied before opening the flood gates. |
| RateLimiter currentTopicPublishRateLimiterOnMessage = publishRateLimiterOnMessage; |
| RateLimiter currentTopicPublishRateLimiterOnByte = publishRateLimiterOnByte; |
| if ((currentTopicPublishRateLimiterOnMessage != null |
| && currentTopicPublishRateLimiterOnMessage.getAvailablePermits() <= 0) |
| || (currentTopicPublishRateLimiterOnByte != null |
| && currentTopicPublishRateLimiterOnByte.getAvailablePermits() <= 0)) { |
| return; |
| } |
| |
| for (Map.Entry<String, RateLimitFunction> entry: rateLimitFunctionMap.entrySet()) { |
| entry.getValue().apply(); |
| } |
| } |
| } |