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/**
* 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.service;
import java.util.concurrent.TimeUnit;
import org.apache.pulsar.common.policies.data.Policies;
import org.apache.pulsar.common.policies.data.PublishRate;
import org.apache.pulsar.common.util.RateLimitFunction;
import org.apache.pulsar.common.util.RateLimiter;
public class PrecisPublishLimiter implements PublishRateLimiter {
protected volatile int publishMaxMessageRate = 0;
protected volatile long publishMaxByteRate = 0;
protected volatile boolean publishThrottlingEnabled = false;
// precise mode for publish rate limiter
private RateLimiter topicPublishRateLimiterOnMessage;
private RateLimiter topicPublishRateLimiterOnByte;
private final RateLimitFunction rateLimitFunction;
public PrecisPublishLimiter(Policies policies, String clusterName, RateLimitFunction rateLimitFunction) {
this.rateLimitFunction = rateLimitFunction;
update(policies, clusterName);
}
public PrecisPublishLimiter(PublishRate publishRate, RateLimitFunction rateLimitFunction) {
this.rateLimitFunction = rateLimitFunction;
update(publishRate);
}
@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) {
final PublishRate maxPublishRate = policies.publishMaxMessageRate != null
? policies.publishMaxMessageRate.get(clusterName)
: null;
this.update(maxPublishRate);
}
public void update(PublishRate maxPublishRate) {
if (maxPublishRate != null
&& (maxPublishRate.publishThrottlingRateInMsg > 0 || maxPublishRate.publishThrottlingRateInByte > 0)) {
this.publishThrottlingEnabled = true;
this.publishMaxMessageRate = Math.max(maxPublishRate.publishThrottlingRateInMsg, 0);
this.publishMaxByteRate = Math.max(maxPublishRate.publishThrottlingRateInByte, 0);
if (this.publishMaxMessageRate > 0) {
topicPublishRateLimiterOnMessage =
new RateLimiter(publishMaxMessageRate, 1, TimeUnit.SECONDS, rateLimitFunction);
}
if (this.publishMaxByteRate > 0) {
topicPublishRateLimiterOnByte = new RateLimiter(publishMaxByteRate, 1, TimeUnit.SECONDS);
}
} else {
this.publishMaxMessageRate = 0;
this.publishMaxByteRate = 0;
this.publishThrottlingEnabled = false;
topicPublishRateLimiterOnMessage = null;
topicPublishRateLimiterOnByte = null;
}
}
@Override
public boolean tryAcquire(int numbers, long bytes) {
return (topicPublishRateLimiterOnMessage == null || topicPublishRateLimiterOnMessage.tryAcquire(numbers))
&& (topicPublishRateLimiterOnByte == null || topicPublishRateLimiterOnByte.tryAcquire(bytes));
}
}