forked from apache/pulsar
/
PublishRateLimiterImpl.java
116 lines (103 loc) · 4.13 KB
/
PublishRateLimiterImpl.java
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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.atomic.LongAdder;
import org.apache.pulsar.common.policies.data.Policies;
import org.apache.pulsar.common.policies.data.PublishRate;
public class PublishRateLimiterImpl implements PublishRateLimiter {
protected volatile int publishMaxMessageRate = 0;
protected volatile long publishMaxByteRate = 0;
protected volatile boolean publishThrottlingEnabled = false;
protected volatile boolean publishRateExceeded = false;
protected volatile LongAdder currentPublishMsgCount = new LongAdder();
protected volatile LongAdder currentPublishByteCount = new LongAdder();
public PublishRateLimiterImpl(Policies policies, String clusterName) {
update(policies, clusterName);
}
public PublishRateLimiterImpl(PublishRate maxPublishRate) {
update(maxPublishRate);
}
@Override
public void checkPublishRate() {
if (this.publishThrottlingEnabled && !publishRateExceeded) {
if (this.publishMaxByteRate > 0) {
long currentPublishByteRate = this.currentPublishByteCount.sum();
if (currentPublishByteRate > this.publishMaxByteRate) {
publishRateExceeded = true;
return;
}
}
if (this.publishMaxMessageRate > 0) {
long currentPublishMsgRate = this.currentPublishMsgCount.sum();
if (currentPublishMsgRate > this.publishMaxMessageRate) {
publishRateExceeded = true;
}
}
}
}
@Override
public void incrementPublishCount(int numOfMessages, long msgSizeInBytes) {
if (this.publishThrottlingEnabled) {
this.currentPublishMsgCount.add(numOfMessages);
this.currentPublishByteCount.add(msgSizeInBytes);
}
}
@Override
public boolean resetPublishCount() {
if (this.publishThrottlingEnabled) {
this.currentPublishMsgCount.reset();
this.currentPublishByteCount.reset();
this.publishRateExceeded = false;
return true;
}
return false;
}
@Override
public boolean isPublishRateExceeded() {
return publishRateExceeded;
}
@Override
public void update(Policies policies, String clusterName) {
final PublishRate maxPublishRate = policies.publishMaxMessageRate != null
? policies.publishMaxMessageRate.get(clusterName)
: null;
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);
} else {
this.publishMaxMessageRate = 0;
this.publishMaxByteRate = 0;
this.publishThrottlingEnabled = false;
}
resetPublishCount();
}
@Override
public boolean tryAcquire(int numbers, long bytes) {
return false;
}
@Override
public void close() throws Exception {
// no-op
}
}