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ToBackupSender.java
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ToBackupSender.java
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/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.internal.eviction;
import com.hazelcast.internal.nearcache.impl.invalidation.InvalidationQueue;
import com.hazelcast.internal.util.CollectionUtil;
import com.hazelcast.spi.impl.NodeEngine;
import com.hazelcast.spi.impl.operationservice.Operation;
import com.hazelcast.spi.impl.operationservice.OperationService;
import java.util.Collection;
import java.util.LinkedList;
import java.util.Queue;
import java.util.function.BiFunction;
/**
* Helper class to create and send backup expiration operations.
*
* @param <RS> type of record store
*/
public final class ToBackupSender<RS> {
private static final int TARGET_BATCH_SIZE = 100;
private final String serviceName;
private final OperationService operationService;
private final BiFunction<Integer, Integer, Boolean> backupOpFilter;
private final BiFunction<RS, Collection<ExpiredKey>, Operation> backupOpSupplier;
private ToBackupSender(String serviceName,
BiFunction<RS, Collection<ExpiredKey>, Operation> backupOpSupplier,
BiFunction<Integer, Integer, Boolean> backupOpFilter,
NodeEngine nodeEngine) {
this.serviceName = serviceName;
this.backupOpFilter = backupOpFilter;
this.backupOpSupplier = backupOpSupplier;
this.operationService = nodeEngine.getOperationService();
}
static <S> ToBackupSender<S> newToBackupSender(String serviceName,
BiFunction<S, Collection<ExpiredKey>, Operation> operationSupplier,
BiFunction<Integer, Integer, Boolean> backupOpFilter,
NodeEngine nodeEngine) {
return new ToBackupSender<S>(serviceName, operationSupplier, backupOpFilter, nodeEngine);
}
private static Collection<ExpiredKey> pollExpiredKeys(Queue<ExpiredKey> expiredKeys) {
Collection<ExpiredKey> polledKeys = new LinkedList<>();
do {
ExpiredKey expiredKey = expiredKeys.poll();
if (expiredKey == null) {
break;
}
polledKeys.add(expiredKey);
} while (true);
return polledKeys;
}
public void trySendExpiryOp(RS recordStore, InvalidationQueue expiredKeyQueue,
int backupReplicaCount, int partitionId, boolean sendIfAtBatchSize) {
if (sendIfAtBatchSize && expiredKeyQueue.size() < TARGET_BATCH_SIZE) {
return;
}
Collection<ExpiredKey> expiredKeys = pollExpiredKeys(expiredKeyQueue);
if (CollectionUtil.isEmpty(expiredKeys)) {
return;
}
// send expired keys to all backups
invokeBackupExpiryOperation(expiredKeys, backupReplicaCount, partitionId, recordStore);
}
public void invokeBackupExpiryOperation(Collection<ExpiredKey> expiredKeys, int backupReplicaCount,
int partitionId, RS recordStore) {
for (int replicaIndex = 1; replicaIndex < backupReplicaCount + 1; replicaIndex++) {
if (backupOpFilter.apply(partitionId, replicaIndex)) {
Operation operation = backupOpSupplier.apply(recordStore, expiredKeys);
operationService.createInvocationBuilder(serviceName, operation, partitionId)
.setReplicaIndex(replicaIndex).invoke();
}
}
}
}