com.hazelcast.crdt.AbstractCRDTReplicationOperation Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2018, 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.crdt;
import com.hazelcast.internal.partition.MigrationCycleOperation;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.spi.Operation;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import static com.hazelcast.util.MapUtil.createHashMap;
/**
* Base class for CRDT replication operations. It supports replicating a
* map of {@link IdentifiedDataSerializable} values. In the case of CRDT
* replication, this will be a map from map name to CRDT state.
* Each concrete implementation of this class should be responsible for a
* single CRDT type and the replication map should only contain CRDT
* states for this CRDT type.
*
* @param the CRDT type
*/
public abstract class AbstractCRDTReplicationOperation
extends Operation implements IdentifiedDataSerializable, MigrationCycleOperation {
/** The map from CRDT name to CRDT state */
private Map replicationData;
protected AbstractCRDTReplicationOperation() {
}
/**
* Constructs the replication operation.
*
* @param replicationData the map of CRDT states to replicate
*/
public AbstractCRDTReplicationOperation(Map replicationData) {
this.replicationData = replicationData;
}
@Override
public void run() throws Exception {
final CRDTReplicationAwareService service = getService();
for (Map.Entry entry : replicationData.entrySet()) {
service.merge(entry.getKey(), entry.getValue());
}
}
@Override
public void afterRun() throws Exception {
super.afterRun();
final CRDTReplicationMigrationService replicationMigrationService =
getNodeEngine().getService(CRDTReplicationMigrationService.SERVICE_NAME);
replicationMigrationService.scheduleMigrationTask(0);
}
@Override
public int getFactoryId() {
return CRDTDataSerializerHook.F_ID;
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
out.writeInt(replicationData.size());
for (Entry entry : replicationData.entrySet()) {
out.writeUTF(entry.getKey());
out.writeObject(entry.getValue());
}
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
final int mapSize = in.readInt();
replicationData = createHashMap(mapSize);
for (int i = 0; i < mapSize; i++) {
final String name = in.readUTF();
final T crdt = in.readObject();
replicationData.put(name, crdt);
}
}
}