hazelcast-master/hazelcast/src/main/java/com/hazelcast/replicatedmap/impl/ReplicatedMapMergeRunnable.java
/*
 * Copyright (c) 2008-2023, 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.replicatedmap.impl;

import com.hazelcast.config.MergePolicyConfig;
import com.hazelcast.config.ReplicatedMapConfig;
import com.hazelcast.replicatedmap.impl.operation.MergeOperationFactory;
import com.hazelcast.replicatedmap.impl.record.ReplicatedRecord;
import com.hazelcast.replicatedmap.impl.record.ReplicatedRecordStore;
import com.hazelcast.spi.impl.NodeEngine;
import com.hazelcast.spi.impl.merge.AbstractMergeRunnable;
import com.hazelcast.spi.impl.operationservice.OperationFactory;
import com.hazelcast.spi.merge.SplitBrainMergePolicy;
import com.hazelcast.spi.merge.SplitBrainMergeTypes.ReplicatedMapMergeTypes;

import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.function.BiConsumer;

import static com.hazelcast.replicatedmap.impl.ReplicatedMapService.SERVICE_NAME;
import static com.hazelcast.spi.impl.merge.MergingValueFactory.createMergingEntry;

class ReplicatedMapMergeRunnable
        extends AbstractMergeRunnable<Object, Object, ReplicatedRecordStore, ReplicatedMapMergeTypes<Object, Object>> {

    private final ReplicatedMapService service;

    ReplicatedMapMergeRunnable(Collection<ReplicatedRecordStore> mergingStores,
                               ReplicatedMapSplitBrainHandlerService splitBrainHandlerService,
                               NodeEngine nodeEngine) {
        super(SERVICE_NAME, mergingStores, splitBrainHandlerService, nodeEngine);

        this.service = nodeEngine.getService(SERVICE_NAME);
    }

    @Override
    protected void mergeStore(ReplicatedRecordStore store,
                              BiConsumer<Integer, ReplicatedMapMergeTypes<Object, Object>> consumer) {
        int partitionId = store.getPartitionId();

        Iterator<ReplicatedRecord> iterator = store.recordIterator();
        while (iterator.hasNext()) {
            ReplicatedRecord record = iterator.next();

            ReplicatedMapMergeTypes<Object, Object> mergingEntry = createMergingEntry(getSerializationService(), record);
            consumer.accept(partitionId, mergingEntry);
        }
    }

    @Override
    protected int getBatchSize(String dataStructureName) {
        ReplicatedMapConfig replicatedMapConfig = getReplicatedMapConfig(dataStructureName);
        MergePolicyConfig mergePolicyConfig = replicatedMapConfig.getMergePolicyConfig();
        return mergePolicyConfig.getBatchSize();
    }

    @Override
    protected SplitBrainMergePolicy getMergePolicy(String dataStructureName) {
        ReplicatedMapConfig replicatedMapConfig = getReplicatedMapConfig(dataStructureName);
        return mergePolicyProvider.getMergePolicy(replicatedMapConfig.getMergePolicyConfig().getPolicy());
    }

    @Override
    protected String getDataStructureName(ReplicatedRecordStore replicatedRecordStore) {
        return replicatedRecordStore.getName();
    }

    @Override
    protected int getPartitionId(ReplicatedRecordStore replicatedRecordStore) {
        return replicatedRecordStore.getPartitionId();
    }

    @Override
    protected OperationFactory createMergeOperationFactory(String dataStructureName,
                                                           SplitBrainMergePolicy<Object, ReplicatedMapMergeTypes<Object, Object>,
                                                                   Object> mergePolicy,
                                                           int[] partitions,
                                                           List<ReplicatedMapMergeTypes<Object, Object>>[] entries) {
        return new MergeOperationFactory(dataStructureName, partitions, entries, mergePolicy);
    }

    private ReplicatedMapConfig getReplicatedMapConfig(String name) {
        return service.getReplicatedMapConfig(name);
    }
}
