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[core] Introduce ExpireChangelogImpl to decouple the changelog lifecycle
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136 changes: 136 additions & 0 deletions
136
paimon-core/src/main/java/org/apache/paimon/table/ExpireChangelogImpl.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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| package org.apache.paimon.table; | ||
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| import org.apache.paimon.Snapshot; | ||
| import org.apache.paimon.annotation.VisibleForTesting; | ||
| import org.apache.paimon.operation.SnapshotDeletion; | ||
| import org.apache.paimon.utils.SnapshotManager; | ||
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import java.io.IOException; | ||
| import java.io.UncheckedIOException; | ||
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| /** Cleanup the changelog in changelog directory. */ | ||
| public class ExpireChangelogImpl implements ExpireSnapshots { | ||
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| public static final Logger LOG = LoggerFactory.getLogger(ExpireChangelogImpl.class); | ||
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| private final SnapshotManager snapshotManager; | ||
| private final SnapshotDeletion snapshotDeletion; | ||
| private final boolean cleanEmptyDirectories; | ||
| /** Whether to keep the last snapshot. */ | ||
| private final boolean keepLastOne; | ||
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| private long olderThanMills = 0; | ||
| private int maxDeletes = Integer.MAX_VALUE; | ||
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| public ExpireChangelogImpl( | ||
| SnapshotManager snapshotManager, | ||
| SnapshotDeletion snapshotDeletion, | ||
| boolean cleanEmptyDirectories, | ||
| boolean keepLastOne) { | ||
| this.snapshotManager = snapshotManager; | ||
| this.snapshotDeletion = snapshotDeletion; | ||
| this.cleanEmptyDirectories = cleanEmptyDirectories; | ||
| this.keepLastOne = keepLastOne; | ||
| } | ||
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| @Override | ||
| public ExpireChangelogImpl retainMax(int retainMax) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public ExpireChangelogImpl retainMin(int retainMin) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public ExpireChangelogImpl olderThanMills(long olderThanMills) { | ||
| this.olderThanMills = olderThanMills; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public ExpireChangelogImpl maxDeletes(int maxDeletes) { | ||
| this.maxDeletes = maxDeletes; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public int expire() { | ||
| Long latest = snapshotManager.latestLongLivedChangelogId(); | ||
| if (latest == null) { | ||
| return 0; | ||
| } | ||
| Long earliest = snapshotManager.earliestLongLivedChangelogId(); | ||
| if (earliest == null) { | ||
| return 0; | ||
| } | ||
| long maxId = Math.min(maxDeletes + earliest - 1, latest); | ||
| for (long id = earliest; id <= maxId; id++) { | ||
| if (snapshotManager.longLivedChangelogExists(id) | ||
| && olderThanMills <= snapshotManager.longLivedChangelog(id).timeMillis()) { | ||
| return expireUntil(earliest, keepLastOne ? id : id + 1); | ||
| } | ||
| } | ||
| return expireUntil(earliest, keepLastOne ? maxId : maxId + 1); | ||
| } | ||
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| public int expireUntil(long earliestId, long endExclusiveId) { | ||
| if (LOG.isDebugEnabled()) { | ||
| LOG.debug("Changelog expire range is [" + earliestId + ", " + endExclusiveId + ")"); | ||
| } | ||
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| for (long id = earliestId; id < endExclusiveId; id++) { | ||
| if (LOG.isDebugEnabled()) { | ||
| LOG.debug("Ready to delete changelog files from snapshot #" + id); | ||
| } | ||
| Snapshot snapshot = snapshotManager.longLivedChangelog(id); | ||
| // delete changelog files | ||
| if (snapshot.changelogManifestList() != null) { | ||
| snapshotDeletion.deleteAddedDataFiles(snapshot.changelogManifestList()); | ||
| } | ||
| snapshotDeletion.cleanUnusedChangelogManifests(snapshot); | ||
| snapshotManager.fileIO().deleteQuietly(snapshotManager.longLivedChangelogPath(id)); | ||
| } | ||
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| if (cleanEmptyDirectories) { | ||
| snapshotDeletion.cleanDataDirectories(); | ||
| } | ||
| writeEarliestHintFile(endExclusiveId); | ||
| return (int) (endExclusiveId - earliestId); | ||
| } | ||
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| private void writeEarliestHintFile(long earliest) { | ||
| try { | ||
| snapshotManager.commitLongLivedChangelogEarliestHint(earliest); | ||
| } catch (IOException e) { | ||
| throw new UncheckedIOException(e); | ||
| } | ||
| } | ||
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| @VisibleForTesting | ||
| public long getOlderThanMills() { | ||
| return olderThanMills; | ||
| } | ||
| } |
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