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[AMORO-1422][Flink] Support MoR with Flink in SQL/Table API for Mix-f…
…ormat table (apache#1952) * [AMORO-1422][Flink] Support MoR with Flink in SQL/Table API for Mix-format table * [AMORO-1422][Flink] Support MoR with Flink in SQL/Table API for Mix-format table * [AMORO-1422][Flink] fixed jingsong's comments.
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Xianxun Ye
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Sep 15, 2023
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...link/src/main/java/com/netease/arctic/flink/read/hybrid/assigner/StaticSplitAssigner.java
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|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /* | ||
| * 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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| package com.netease.arctic.flink.read.hybrid.assigner; | ||
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| import com.netease.arctic.flink.read.hybrid.enumerator.ArcticSourceEnumState; | ||
| import com.netease.arctic.flink.read.hybrid.split.ArcticSplit; | ||
| import com.netease.arctic.flink.read.hybrid.split.ArcticSplitState; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import javax.annotation.Nullable; | ||
| import java.io.IOException; | ||
| import java.util.Collection; | ||
| import java.util.Collections; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.PriorityBlockingQueue; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| /** | ||
| * This is a static split assigner which is used for batch mode. | ||
| */ | ||
| public class StaticSplitAssigner implements SplitAssigner { | ||
| private static final Logger LOG = LoggerFactory.getLogger(StaticSplitAssigner.class); | ||
|
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| private static final long POLL_TIMEOUT = 200; | ||
| private int totalSplitNum; | ||
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| private final PriorityBlockingQueue<ArcticSplit> splitQueue; | ||
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| private CompletableFuture<Void> availableFuture; | ||
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| public StaticSplitAssigner(@Nullable ArcticSourceEnumState enumState) { | ||
| this.splitQueue = new PriorityBlockingQueue<>(); | ||
| if (enumState != null) { | ||
| Collection<ArcticSplitState> splitStates = enumState.pendingSplits(); | ||
| splitStates.forEach(state -> onDiscoveredSplits(Collections.singleton(state.toSourceSplit()))); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public Split getNext() { | ||
| return getNextSplit().map(Split::of).orElseGet(Split::unavailable); | ||
| } | ||
|
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| @Override | ||
| public Split getNext(int subtaskId) { | ||
| return getNext(); | ||
| } | ||
|
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| private Optional<ArcticSplit> getNextSplit() { | ||
| ArcticSplit arcticSplit = null; | ||
| try { | ||
| arcticSplit = splitQueue.poll(POLL_TIMEOUT, TimeUnit.MILLISECONDS); | ||
| } catch (InterruptedException e) { | ||
| LOG.warn("Interrupted when polling splits from the split queue", e); | ||
| } | ||
| if (arcticSplit == null) { | ||
| LOG.debug("Couldn't retrieve arctic source split from the queue, as the queue is empty."); | ||
| return Optional.empty(); | ||
| } else { | ||
| LOG.info("Assigning the arctic split, task index is {}, total number of splits is {}, arctic split is {}.", | ||
| arcticSplit.taskIndex(), totalSplitNum, arcticSplit); | ||
| return Optional.of(arcticSplit); | ||
| } | ||
| } | ||
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| @Override | ||
| public void onDiscoveredSplits(Collection<ArcticSplit> splits) { | ||
| splits.forEach(this::putArcticIntoQueue); | ||
| totalSplitNum += splits.size(); | ||
| // only complete pending future if new splits are discovered | ||
| completeAvailableFuturesIfNeeded(); | ||
| } | ||
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| @Override | ||
| public void onUnassignedSplits(Collection<ArcticSplit> splits) { | ||
| onDiscoveredSplits(splits); | ||
| } | ||
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| void putArcticIntoQueue(final ArcticSplit split) { | ||
| splitQueue.put(split); | ||
| } | ||
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| @Override | ||
| public Collection<ArcticSplitState> state() { | ||
| return splitQueue.stream().map(ArcticSplitState::new).collect(Collectors.toList()); | ||
| } | ||
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| @Override | ||
| public synchronized CompletableFuture<Void> isAvailable() { | ||
| if (availableFuture == null) { | ||
| availableFuture = new CompletableFuture<>(); | ||
| } | ||
| return availableFuture; | ||
| } | ||
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| public boolean isEmpty() { | ||
| return splitQueue.isEmpty(); | ||
| } | ||
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| @Override | ||
| public void close() throws IOException { | ||
| splitQueue.clear(); | ||
| } | ||
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| private synchronized void completeAvailableFuturesIfNeeded() { | ||
| if (availableFuture != null && !isEmpty()) { | ||
| availableFuture.complete(null); | ||
| } | ||
| availableFuture = null; | ||
| } | ||
| } |
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