org.apache.flink.runtime.state.RegisteredStateMetaInfoBase Maven / Gradle / Ivy
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* 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.state;
import org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot;
import javax.annotation.Nonnull;
/** Base class for all registered state in state backends. */
public abstract class RegisteredStateMetaInfoBase {
/** The name of the state */
@Nonnull protected final String name;
public RegisteredStateMetaInfoBase(@Nonnull String name) {
this.name = name;
}
@Nonnull
public String getName() {
return name;
}
@Nonnull
public abstract StateMetaInfoSnapshot snapshot();
public static RegisteredStateMetaInfoBase fromMetaInfoSnapshot(
@Nonnull StateMetaInfoSnapshot snapshot) {
final StateMetaInfoSnapshot.BackendStateType backendStateType =
snapshot.getBackendStateType();
switch (backendStateType) {
case KEY_VALUE:
return new RegisteredKeyValueStateBackendMetaInfo<>(snapshot);
case OPERATOR:
return new RegisteredOperatorStateBackendMetaInfo<>(snapshot);
case BROADCAST:
return new RegisteredBroadcastStateBackendMetaInfo<>(snapshot);
case PRIORITY_QUEUE:
return new RegisteredPriorityQueueStateBackendMetaInfo<>(snapshot);
default:
throw new IllegalArgumentException(
"Unknown backend state type: " + backendStateType);
}
}
}