pulsar-broker/src/main/java/org/apache/pulsar/broker/service/PublishRateLimiter.java

/*
 * 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
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package org.apache.pulsar.broker.service;

import org.apache.pulsar.common.policies.data.Policies;
import org.apache.pulsar.common.policies.data.PublishRate;

public interface PublishRateLimiter {

    /**
     * Consumes publishing quota and handles throttling.
     * <p>
     * The rate limiter implementation calls {@link Producer#incrementThrottleCount()} to indicate
     * that the producer should be throttled. The rate limiter must schedule a call to
     * {@link Producer#decrementThrottleCount()} after a throttling period that it calculates.
     *
     * @param numOfMessages  number of messages to publish
     * @param msgSizeInBytes size of messages in bytes to publish
     */
    void handlePublishThrottling(Producer producer, int numOfMessages, long msgSizeInBytes);

    /**
     * updates rate-limiting threshold based on policies.
     * @param policies
     * @param clusterName
     */
    void update(Policies policies, String clusterName);

    /**
     * updates rate-limiting threshold based on passed in rate limiter.
     * @param maxPublishRate
     */
    void update(PublishRate maxPublishRate);
}