com.hazelcast.cp.internal.datastructures.spi.atomic.RaftAtomicValueSnapshot 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.cp.internal.datastructures.spi.atomic;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* Snapshot of a {@link RaftAtomicValueService} state for a Raft group
*/
public abstract class RaftAtomicValueSnapshot implements IdentifiedDataSerializable {
protected Map values = Collections.emptyMap();
protected Set destroyed = Collections.emptySet();
public RaftAtomicValueSnapshot() {
}
public RaftAtomicValueSnapshot(Map values, Set destroyed) {
this.values = values;
this.destroyed = destroyed;
}
public Iterable> getValues() {
return values.entrySet();
}
public Set getDestroyed() {
return destroyed;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeInt(values.size());
for (Map.Entry entry : values.entrySet()) {
out.writeUTF(entry.getKey());
writeValue(out, entry.getValue());
}
out.writeInt(destroyed.size());
for (String name : destroyed) {
out.writeUTF(name);
}
}
protected abstract void writeValue(ObjectDataOutput out, T value) throws IOException;
@Override
public void readData(ObjectDataInput in) throws IOException {
int len = in.readInt();
values = new HashMap<>(len);
for (int i = 0; i < len; i++) {
String name = in.readUTF();
T value = readValue(in);
values.put(name, value);
}
len = in.readInt();
destroyed = new HashSet<>(len);
for (int i = 0; i < len; i++) {
String name = in.readUTF();
destroyed.add(name);
}
}
protected abstract T readValue(ObjectDataInput in) throws IOException;
}