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[core] Support async refresh for PrimaryKeyPartialLookupTable
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...on-flink-common/src/main/java/org/apache/paimon/flink/lookup/AsyncRefreshLookupTable.java
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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. | ||
| */ | ||
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|
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| package org.apache.paimon.flink.lookup; | ||
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| import org.apache.paimon.data.InternalRow; | ||
| import org.apache.paimon.options.Options; | ||
| import org.apache.paimon.table.FileStoreTable; | ||
| import org.apache.paimon.utils.ExecutorThreadFactory; | ||
| import org.apache.paimon.utils.ExecutorUtils; | ||
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import javax.annotation.Nullable; | ||
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| import java.io.IOException; | ||
| import java.util.List; | ||
| import java.util.concurrent.ExecutorService; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.Future; | ||
| import java.util.concurrent.RejectedExecutionException; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
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| import static org.apache.paimon.flink.FlinkConnectorOptions.LOOKUP_REFRESH_ASYNC; | ||
| import static org.apache.paimon.flink.FlinkConnectorOptions.LOOKUP_REFRESH_ASYNC_PENDING_SNAPSHOT_COUNT; | ||
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| /** A {@link LookupTable} supports async refresh. */ | ||
| public abstract class AsyncRefreshLookupTable implements LookupTable { | ||
| private static final Logger LOG = LoggerFactory.getLogger(AsyncRefreshLookupTable.class); | ||
| private final FileStoreTable table; | ||
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| private final int maxPendingSnapshotCount; | ||
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| @Nullable private final ExecutorService refreshExecutor; | ||
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| private final AtomicReference<Exception> cachedException; | ||
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| private Future<?> refreshFuture; | ||
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| protected final Object lock; | ||
| protected final boolean refreshAsync; | ||
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| public AsyncRefreshLookupTable(FileStoreTable table) { | ||
| Options options = Options.fromMap(table.options()); | ||
| this.table = table; | ||
| this.refreshAsync = options.get(LOOKUP_REFRESH_ASYNC); | ||
| this.refreshExecutor = | ||
| this.refreshAsync | ||
| ? Executors.newSingleThreadExecutor( | ||
| new ExecutorThreadFactory( | ||
| String.format( | ||
| "%s-lookup-refresh", | ||
| Thread.currentThread().getName()))) | ||
| : null; | ||
| this.lock = this.refreshAsync ? new Object() : null; | ||
| this.cachedException = new AtomicReference<>(); | ||
| this.maxPendingSnapshotCount = options.get(LOOKUP_REFRESH_ASYNC_PENDING_SNAPSHOT_COUNT); | ||
| } | ||
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| @Override | ||
| public List<InternalRow> get(InternalRow key) throws IOException { | ||
| List<InternalRow> values; | ||
| if (refreshAsync) { | ||
| synchronized (lock) { | ||
| values = doGet(key); | ||
| } | ||
| } else { | ||
| values = doGet(key); | ||
| } | ||
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| return values; | ||
| } | ||
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| public abstract List<InternalRow> doGet(InternalRow key) throws IOException; | ||
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| @Override | ||
| public void refresh() throws Exception { | ||
| if (refreshExecutor == null) { | ||
| doRefresh(); | ||
| return; | ||
| } | ||
|
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| Long latestSnapshotId = table.snapshotManager().latestSnapshotId(); | ||
| Long nextSnapshotId = nextSnapshotId(); | ||
| if (latestSnapshotId != null | ||
| && nextSnapshotId != null | ||
| && latestSnapshotId - nextSnapshotId > maxPendingSnapshotCount) { | ||
| LOG.warn( | ||
| "The latest snapshot id {} is much greater than the next snapshot id {} for {}}, " | ||
| + "you may need to increase the parallelism of lookup operator.", | ||
| latestSnapshotId, | ||
| nextSnapshotId, | ||
| maxPendingSnapshotCount); | ||
| sync(); | ||
| doRefresh(); | ||
| } else { | ||
| try { | ||
| refreshFuture = | ||
| refreshExecutor.submit( | ||
| () -> { | ||
| try { | ||
| doRefresh(); | ||
| } catch (Exception e) { | ||
| LOG.error( | ||
| "Refresh lookup table {} failed", table.name(), e); | ||
| cachedException.set(e); | ||
| } | ||
| }); | ||
| } catch (RejectedExecutionException e) { | ||
| LOG.warn("Add refresh task for lookup table {} failed", table.name(), e); | ||
| } | ||
| } | ||
| } | ||
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| /** Wait until the previous refresh task to be finished. */ | ||
| public void sync() throws Exception { | ||
| if (refreshFuture != null) { | ||
| this.refreshFuture.get(); | ||
| } | ||
| } | ||
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| public abstract void doRefresh() throws Exception; | ||
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| public abstract Long nextSnapshotId(); | ||
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| @Override | ||
| public void close() throws IOException { | ||
| if (refreshExecutor != null) { | ||
| ExecutorUtils.gracefulShutdown(1L, TimeUnit.MINUTES, refreshExecutor); | ||
| } | ||
| } | ||
| } |
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