com.hazelcast.cache.impl.operation.CacheMergeOperation Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, 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.cache.impl.operation;
import com.hazelcast.cache.impl.CacheDataSerializerHook;
import com.hazelcast.cache.impl.record.CacheRecord;
import com.hazelcast.core.Member;
import com.hazelcast.internal.cluster.Versions;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.BackupAwareOperation;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.impl.operationservice.TargetAware;
import com.hazelcast.spi.merge.SplitBrainMergePolicy;
import com.hazelcast.spi.merge.SplitBrainMergeTypes.CacheMergeTypes;
import com.hazelcast.version.Version;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import static com.hazelcast.wan.impl.CallerProvenance.NOT_WAN;
import static com.hazelcast.util.MapUtil.createHashMap;
/**
* Contains multiple merging entries for split-brain healing with a {@link SplitBrainMergePolicy}.
*
* @since 3.10
*/
public class CacheMergeOperation extends CacheOperation implements BackupAwareOperation, TargetAware {
private List mergingEntries;
private SplitBrainMergePolicy mergePolicy;
private transient boolean hasBackups;
private transient Map backupRecords;
private transient Address target;
public CacheMergeOperation() {
}
public CacheMergeOperation(String name, List mergingEntries,
SplitBrainMergePolicy mergePolicy) {
super(name);
this.mergingEntries = mergingEntries;
this.mergePolicy = mergePolicy;
}
@Override
protected void beforeRunInternal() {
hasBackups = getSyncBackupCount() + getAsyncBackupCount() > 0;
if (hasBackups) {
backupRecords = createHashMap(mergingEntries.size());
}
}
@Override
public void run() {
for (CacheMergeTypes mergingEntry : mergingEntries) {
merge(mergingEntry);
}
}
private void merge(CacheMergeTypes mergingEntry) {
Data dataKey = mergingEntry.getKey();
CacheRecord backupRecord = recordStore.merge(mergingEntry, mergePolicy, NOT_WAN);
if (backupRecord != null) {
backupRecords.put(dataKey, backupRecord);
}
if (recordStore.isWanReplicationEnabled()) {
if (backupRecord != null) {
publishWanUpdate(dataKey, backupRecord);
} else {
publishWanRemove(dataKey);
}
}
}
@Override
public Object getResponse() {
return !backupRecords.isEmpty();
}
@Override
public boolean shouldBackup() {
return hasBackups && !backupRecords.isEmpty();
}
@Override
public Operation getBackupOperation() {
return new CachePutAllBackupOperation(name, backupRecords);
}
@Override
public void setTarget(Address address) {
this.target = address;
}
@Override
protected boolean requiresExplicitServiceName() {
// RU_COMPAT_3_10
Member member = getNodeEngine().getClusterService().getMember(target);
if (member == null) {
return false;
}
Version memberVersion = member.getVersion().asVersion();
return memberVersion.isLessThan(Versions.V3_11);
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
out.writeInt(mergingEntries.size());
for (CacheMergeTypes mergingEntry : mergingEntries) {
out.writeObject(mergingEntry);
}
out.writeObject(mergePolicy);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
int size = in.readInt();
mergingEntries = new ArrayList(size);
for (int i = 0; i < size; i++) {
CacheMergeTypes mergingEntry = in.readObject();
mergingEntries.add(mergingEntry);
}
mergePolicy = in.readObject();
}
@Override
public int getId() {
return CacheDataSerializerHook.MERGE;
}
}