/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.flink.runtime.checkpoint.savepoint;
import org.apache.flink.migration.runtime.checkpoint.savepoint.SavepointV0;
import org.apache.flink.migration.runtime.checkpoint.savepoint.SavepointV0Serializer;
import org.apache.flink.util.Preconditions;
import java.util.HashMap;
import java.util.Map;
/**
* Helper to access {@link SavepointSerializer} for a specific savepoint version.
*/
public class SavepointSerializers {
private static final Map<Integer, SavepointSerializer<?>> SERIALIZERS = new HashMap<>(2);
static {
SERIALIZERS.put(SavepointV0.VERSION, SavepointV0Serializer.INSTANCE);
SERIALIZERS.put(SavepointV1.VERSION, SavepointV1Serializer.INSTANCE);
SERIALIZERS.put(SavepointV2.VERSION, SavepointV2Serializer.INSTANCE);
}
// ------------------------------------------------------------------------
/**
* Returns the {@link SavepointSerializer} for the given savepoint.
*
* @param savepoint Savepoint to get serializer for
* @param <T> Type of savepoint
* @return Savepoint serializer for the savepoint
* @throws IllegalArgumentException If unknown savepoint version
*/
@SuppressWarnings("unchecked")
public static <T extends Savepoint> SavepointSerializer<T> getSerializer(T savepoint) {
Preconditions.checkNotNull(savepoint, "Savepoint");
SavepointSerializer<T> serializer = (SavepointSerializer<T>) SERIALIZERS.get(savepoint.getVersion());
if (serializer != null) {
return serializer;
} else {
throw new IllegalArgumentException("Unknown savepoint version " + savepoint.getVersion() + ".");
}
}
/**
* Returns the {@link SavepointSerializer} for the given savepoint version.
*
* @param version Savepoint version to get serializer for
* @return Savepoint for the given version
* @throws IllegalArgumentException If unknown savepoint version
*/
@SuppressWarnings("unchecked")
public static SavepointSerializer<?> getSerializer(int version) {
SavepointSerializer<?> serializer = SERIALIZERS.get(version);
if (serializer != null) {
return serializer;
} else {
throw new IllegalArgumentException("Cannot restore savepoint version " + version + ".");
}
}
}