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[FLINK-32080][FLIP-306][checkpoint] Restoration of FileMergingSnapsho…
…tManager This closes apache#24640.
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116 changes: 116 additions & 0 deletions
116
...pache/flink/runtime/checkpoint/filemerging/SubtaskFileMergingManagerRestoreOperation.java
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| @@ -0,0 +1,116 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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|
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| package org.apache.flink.runtime.checkpoint.filemerging; | ||
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| import org.apache.flink.api.common.JobID; | ||
| import org.apache.flink.api.common.TaskInfo; | ||
| import org.apache.flink.runtime.checkpoint.OperatorSubtaskState; | ||
| import org.apache.flink.runtime.jobgraph.OperatorID; | ||
| import org.apache.flink.runtime.state.IncrementalRemoteKeyedStateHandle; | ||
| import org.apache.flink.runtime.state.KeyGroupsStateHandle; | ||
| import org.apache.flink.runtime.state.KeyedStateHandle; | ||
| import org.apache.flink.runtime.state.OperatorStateHandle; | ||
| import org.apache.flink.runtime.state.StateObject; | ||
| import org.apache.flink.runtime.state.StreamStateHandle; | ||
| import org.apache.flink.runtime.state.filemerging.SegmentFileStateHandle; | ||
| import org.apache.flink.util.Preconditions; | ||
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| import java.util.function.Function; | ||
| import java.util.stream.Stream; | ||
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| /** | ||
| * Restore operation that restores file-merging information belonging to one subtask for {@link | ||
| * FileMergingSnapshotManager}. | ||
| */ | ||
| public class SubtaskFileMergingManagerRestoreOperation { | ||
|
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| /** The restored checkpoint id. */ | ||
| private final long checkpointId; | ||
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| /** The restored job id. */ | ||
| private final JobID jobID; | ||
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| /** The restored Task info. */ | ||
| private final TaskInfo taskInfo; | ||
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| /** The id of the operator to which the subtask belongs. */ | ||
| private final OperatorID operatorID; | ||
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| private final FileMergingSnapshotManager fileMergingSnapshotManager; | ||
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| /** The state which belongs to the restored subtask. */ | ||
| private final OperatorSubtaskState subtaskState; | ||
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| public SubtaskFileMergingManagerRestoreOperation( | ||
| long checkpointId, | ||
| FileMergingSnapshotManager fileMergingSnapshotManager, | ||
| JobID jobID, | ||
| TaskInfo taskInfo, | ||
| OperatorID operatorID, | ||
| OperatorSubtaskState subtaskState) { | ||
| this.checkpointId = checkpointId; | ||
| this.fileMergingSnapshotManager = fileMergingSnapshotManager; | ||
| this.jobID = jobID; | ||
| this.taskInfo = Preconditions.checkNotNull(taskInfo); | ||
| this.operatorID = Preconditions.checkNotNull(operatorID); | ||
| this.subtaskState = Preconditions.checkNotNull(subtaskState); | ||
| } | ||
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| public void restore() { | ||
| FileMergingSnapshotManager.SubtaskKey subtaskKey = | ||
| new FileMergingSnapshotManager.SubtaskKey(jobID, operatorID, taskInfo); | ||
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| Stream<? extends StateObject> keyedStateHandles = | ||
| Stream.concat( | ||
| subtaskState.getManagedKeyedState().stream(), | ||
| subtaskState.getRawKeyedState().stream()) | ||
| .flatMap(this::getChildrenStreamHandles); | ||
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| Stream<? extends StateObject> operatorStateHandles = | ||
| Stream.concat( | ||
| subtaskState.getManagedOperatorState().stream(), | ||
| subtaskState.getRawOperatorState().stream()) | ||
| .flatMap(this::getChildrenStreamHandles); | ||
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| // TODO support channel state restore for unaligned checkpoint. | ||
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| Stream<SegmentFileStateHandle> segmentStateHandles = | ||
| Stream.of(keyedStateHandles, operatorStateHandles) | ||
| .flatMap(Function.identity()) | ||
| .filter(handle -> handle instanceof SegmentFileStateHandle) | ||
| .map(handle -> (SegmentFileStateHandle) handle); | ||
| fileMergingSnapshotManager.restoreStateHandles( | ||
| checkpointId, subtaskKey, segmentStateHandles); | ||
| } | ||
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| private Stream<? extends StateObject> getChildrenStreamHandles(KeyedStateHandle parentHandle) { | ||
| if (parentHandle instanceof IncrementalRemoteKeyedStateHandle) { | ||
| return ((IncrementalRemoteKeyedStateHandle) parentHandle).streamSubHandles(); | ||
| } | ||
| if (parentHandle instanceof KeyGroupsStateHandle) { | ||
| return Stream.of(((KeyGroupsStateHandle) parentHandle).getDelegateStateHandle()); | ||
| } | ||
| // TODO support changelog keyed state handle | ||
| return Stream.of(parentHandle); | ||
| } | ||
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| private Stream<StreamStateHandle> getChildrenStreamHandles(OperatorStateHandle parentHandle) { | ||
| return Stream.of(parentHandle.getDelegateStateHandle()); | ||
| } | ||
| } |
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