com.hazelcast.cp.internal.raftop.snapshot.RestoreSnapshotOp 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.raftop.snapshot;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.cp.CPGroupId;
import com.hazelcast.cp.internal.raft.SnapshotAwareService;
import com.hazelcast.cp.internal.RaftServiceDataSerializerHook;
import com.hazelcast.cp.internal.RaftOp;
import java.io.IOException;
/**
* {@code RaftOp} to restore snapshot using related
* {@link SnapshotAwareService#takeSnapshot(CPGroupId, long)}.
*
* This operation is appended to Raft log in
* {@link com.hazelcast.cp.internal.raft.impl.log.SnapshotEntry} and sent to
* followers via
* {@link com.hazelcast.cp.internal.raft.impl.dto.InstallSnapshot} RPC.
*/
public class RestoreSnapshotOp extends RaftOp implements IdentifiedDataSerializable {
private String serviceName;
private Object snapshot;
public RestoreSnapshotOp() {
}
public RestoreSnapshotOp(String serviceName, Object snapshot) {
this.serviceName = serviceName;
this.snapshot = snapshot;
}
public Object getSnapshot() {
return snapshot;
}
@Override
public Object run(CPGroupId groupId, long commitIndex) {
SnapshotAwareService service = getService();
service.restoreSnapshot(groupId, commitIndex, snapshot);
return null;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeUTF(serviceName);
out.writeObject(snapshot);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
serviceName = in.readUTF();
snapshot = in.readObject();
}
@Override
public int getFactoryId() {
return RaftServiceDataSerializerHook.F_ID;
}
@Override
public int getClassId() {
return RaftServiceDataSerializerHook.RESTORE_SNAPSHOT_OP;
}
@Override
public String getServiceName() {
return serviceName;
}
@Override
protected void toString(StringBuilder sb) {
sb.append(", snapshot=").append(snapshot);
}
}