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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.heap;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.core.fs.CloseableRegistry;
import org.apache.flink.runtime.query.TaskKvStateRegistry;
import org.apache.flink.runtime.state.AbstractKeyedStateBackendBuilder;
import org.apache.flink.runtime.state.BackendBuildingException;
import org.apache.flink.runtime.state.KeyGroupRange;
import org.apache.flink.runtime.state.KeyedStateHandle;
import org.apache.flink.runtime.state.LocalRecoveryConfig;
import org.apache.flink.runtime.state.StreamCompressionDecorator;
import org.apache.flink.runtime.state.ttl.TtlTimeProvider;
import javax.annotation.Nonnull;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
/**
* Builder class for {@link HeapKeyedStateBackend} which handles all necessary initializations and clean ups.
*
* @param The data type that the key serializer serializes.
*/
public class HeapKeyedStateBackendBuilder extends AbstractKeyedStateBackendBuilder {
/**
* The configuration of local recovery.
*/
private final LocalRecoveryConfig localRecoveryConfig;
/**
* Factory for state that is organized as priority queue.
*/
private final HeapPriorityQueueSetFactory priorityQueueSetFactory;
/**
* Whether asynchronous snapshot is enabled.
*/
private final boolean asynchronousSnapshots;
public HeapKeyedStateBackendBuilder(
TaskKvStateRegistry kvStateRegistry,
TypeSerializer keySerializer,
ClassLoader userCodeClassLoader,
int numberOfKeyGroups,
KeyGroupRange keyGroupRange,
ExecutionConfig executionConfig,
TtlTimeProvider ttlTimeProvider,
@Nonnull Collection stateHandles,
StreamCompressionDecorator keyGroupCompressionDecorator,
LocalRecoveryConfig localRecoveryConfig,
HeapPriorityQueueSetFactory priorityQueueSetFactory,
boolean asynchronousSnapshots,
CloseableRegistry cancelStreamRegistry) {
super(
kvStateRegistry,
keySerializer,
userCodeClassLoader,
numberOfKeyGroups,
keyGroupRange,
executionConfig,
ttlTimeProvider,
stateHandles,
keyGroupCompressionDecorator,
cancelStreamRegistry);
this.localRecoveryConfig = localRecoveryConfig;
this.priorityQueueSetFactory = priorityQueueSetFactory;
this.asynchronousSnapshots = asynchronousSnapshots;
}
@Override
public HeapKeyedStateBackend build() throws BackendBuildingException {
// Map of registered Key/Value states
Map> registeredKVStates = new HashMap<>();
// Map of registered priority queue set states
Map registeredPQStates = new HashMap<>();
CloseableRegistry cancelStreamRegistryForBackend = new CloseableRegistry();
HeapSnapshotStrategy snapshotStrategy = initSnapshotStrategy(
asynchronousSnapshots, registeredKVStates, registeredPQStates, cancelStreamRegistryForBackend);
InternalKeyContext keyContext = new InternalKeyContextImpl<>(
keyGroupRange,
numberOfKeyGroups
);
HeapRestoreOperation restoreOperation = new HeapRestoreOperation<>(
restoreStateHandles,
keySerializerProvider,
userCodeClassLoader,
registeredKVStates,
registeredPQStates,
cancelStreamRegistry,
priorityQueueSetFactory,
keyGroupRange,
numberOfKeyGroups,
snapshotStrategy,
keyContext);
try {
restoreOperation.restore();
} catch (Exception e) {
throw new BackendBuildingException("Failed when trying to restore heap backend", e);
}
return new HeapKeyedStateBackend<>(
kvStateRegistry,
keySerializerProvider.currentSchemaSerializer(),
userCodeClassLoader,
executionConfig,
ttlTimeProvider,
cancelStreamRegistryForBackend,
keyGroupCompressionDecorator,
registeredKVStates,
registeredPQStates,
localRecoveryConfig,
priorityQueueSetFactory,
snapshotStrategy,
keyContext);
}
private HeapSnapshotStrategy initSnapshotStrategy(
boolean asynchronousSnapshots,
Map> registeredKVStates,
Map registeredPQStates,
CloseableRegistry cancelStreamRegistry) {
SnapshotStrategySynchronicityBehavior synchronicityTrait = asynchronousSnapshots ?
new AsyncSnapshotStrategySynchronicityBehavior<>() :
new SyncSnapshotStrategySynchronicityBehavior<>();
return new HeapSnapshotStrategy<>(
synchronicityTrait,
registeredKVStates,
registeredPQStates,
keyGroupCompressionDecorator,
localRecoveryConfig,
keyGroupRange,
cancelStreamRegistry,
keySerializerProvider);
}
}
