org.apache.flink.runtime.state.gemini.engine.snapshot.RegionSnapshot 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.gemini.engine.snapshot;

import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.runtime.state.gemini.engine.fs.FileManager;
import org.apache.flink.util.Preconditions;

import java.util.HashMap;
import java.util.Map;

/**
 * Snapshot for a region.
 */
public class RegionSnapshot {
	private final FileManager fileManager;

	private final SnapshotMetaFile.Writer writer;

	private int region;

	// {fileId, }
	private final Map> regionFileMeta;

	private final boolean isLocalSnapshot;

	public RegionSnapshot(
		FileManager fileManager,
		SnapshotMetaFile.Writer writer,
		boolean isLocalSnapshot) {
		this.fileManager = Preconditions.checkNotNull(fileManager);
		this.writer = Preconditions.checkNotNull(writer);
		this.regionFileMeta = new HashMap<>();
		this.isLocalSnapshot = isLocalSnapshot;
	}

	public boolean isLocalSnapshot() {
		return isLocalSnapshot;
	}

	public int getRegion() {
		return region;
	}

	public SnapshotMetaFile.Writer getWriter() {
		return writer;
	}

	public Map> getRegionFileMeta() {
		return regionFileMeta;
	}

	public void updateFileMeta(long address, int reference, long size) {
		int fileId = fileManager.getSimpleFileID(address);
		Tuple2 meta = regionFileMeta.computeIfAbsent(fileId, (no) -> Tuple2.of(0, 0L));
		meta.f0 += reference;
		meta.f1 += size;
	}

	public void reset(int newRegion) {
		region = newRegion;
		if (regionFileMeta != null) {
			regionFileMeta.clear();
		}
	}
}