org.apache.pulsar.common.intercept.AppendIndexMetadataInterceptor Maven / Gradle / Ivy
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* 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
*
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package org.apache.pulsar.common.intercept;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.pulsar.common.api.proto.BrokerEntryMetadata;
public class AppendIndexMetadataInterceptor implements BrokerEntryMetadataInterceptor{
private final AtomicLong indexGenerator;
public AppendIndexMetadataInterceptor() {
this.indexGenerator = new AtomicLong(-1);
}
public void recoveryIndexGenerator(long index) {
if (indexGenerator.get() < index) {
indexGenerator.set(index);
}
}
@Override
public BrokerEntryMetadata intercept(BrokerEntryMetadata brokerMetadata) {
// do nothing, just return brokerMetadata
return brokerMetadata;
}
@Override
public BrokerEntryMetadata interceptWithNumberOfMessages(
BrokerEntryMetadata brokerMetadata,
int numberOfMessages) {
return brokerMetadata.setIndex(indexGenerator.addAndGet(numberOfMessages));
}
public long getIndex() {
return indexGenerator.get();
}
public void decreaseWithNumberOfMessages(int numberOfMessages) {
indexGenerator.addAndGet(-numberOfMessages);
}
}