| /* |
| * 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.annotation.VisibleForTesting; |
| import org.apache.flink.api.common.ExecutionConfig; |
| import org.apache.flink.core.fs.CloseableRegistry; |
| import org.apache.flink.util.IOUtils; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import static org.apache.flink.runtime.state.SnapshotExecutionType.ASYNCHRONOUS; |
| import static org.apache.flink.runtime.state.SnapshotExecutionType.SYNCHRONOUS; |
| |
| /** |
| * Builder class for {@link DefaultOperatorStateBackend} which handles all necessary initializations |
| * and clean ups. |
| */ |
| public class DefaultOperatorStateBackendBuilder |
| implements StateBackendBuilder<DefaultOperatorStateBackend, BackendBuildingException> { |
| /** The user code classloader. */ |
| @VisibleForTesting protected final ClassLoader userClassloader; |
| /** The execution configuration. */ |
| @VisibleForTesting protected final ExecutionConfig executionConfig; |
| /** Flag to de/activate asynchronous snapshots. */ |
| @VisibleForTesting protected final boolean asynchronousSnapshots; |
| /** State handles for restore. */ |
| @VisibleForTesting protected final Collection<OperatorStateHandle> restoreStateHandles; |
| |
| @VisibleForTesting protected final CloseableRegistry cancelStreamRegistry; |
| |
| public DefaultOperatorStateBackendBuilder( |
| ClassLoader userClassloader, |
| ExecutionConfig executionConfig, |
| boolean asynchronousSnapshots, |
| Collection<OperatorStateHandle> stateHandles, |
| CloseableRegistry cancelStreamRegistry) { |
| this.userClassloader = userClassloader; |
| this.executionConfig = executionConfig; |
| this.asynchronousSnapshots = asynchronousSnapshots; |
| this.restoreStateHandles = stateHandles; |
| this.cancelStreamRegistry = cancelStreamRegistry; |
| } |
| |
| @Override |
| public DefaultOperatorStateBackend build() throws BackendBuildingException { |
| Map<String, PartitionableListState<?>> registeredOperatorStates = new HashMap<>(); |
| Map<String, BackendWritableBroadcastState<?, ?>> registeredBroadcastStates = |
| new HashMap<>(); |
| CloseableRegistry cancelStreamRegistryForBackend = new CloseableRegistry(); |
| |
| DefaultOperatorStateBackendSnapshotStrategy snapshotStrategy = |
| new DefaultOperatorStateBackendSnapshotStrategy( |
| userClassloader, registeredOperatorStates, registeredBroadcastStates); |
| OperatorStateRestoreOperation restoreOperation = |
| new OperatorStateRestoreOperation( |
| cancelStreamRegistry, |
| userClassloader, |
| registeredOperatorStates, |
| registeredBroadcastStates, |
| restoreStateHandles); |
| try { |
| restoreOperation.restore(); |
| } catch (Exception e) { |
| IOUtils.closeQuietly(cancelStreamRegistryForBackend); |
| throw new BackendBuildingException( |
| "Failed when trying to restore operator state backend", e); |
| } |
| return new DefaultOperatorStateBackend( |
| executionConfig, |
| cancelStreamRegistryForBackend, |
| registeredOperatorStates, |
| registeredBroadcastStates, |
| new HashMap<>(), |
| new HashMap<>(), |
| new SnapshotStrategyRunner<>( |
| "DefaultOperatorStateBackend snapshot", |
| snapshotStrategy, |
| cancelStreamRegistryForBackend, |
| asynchronousSnapshots ? ASYNCHRONOUS : SYNCHRONOUS)); |
| } |
| } |