| /* |
| * 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.cassandra.db.partitions; |
| |
| import java.util.function.LongPredicate; |
| |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.rows.*; |
| import org.apache.cassandra.db.transform.Transformation; |
| |
| public abstract class PurgeFunction extends Transformation<UnfilteredRowIterator> |
| { |
| private final DeletionPurger purger; |
| private final int nowInSec; |
| |
| private final boolean enforceStrictLiveness; |
| private boolean isReverseOrder; |
| |
| private boolean ignoreGcGraceSeconds; |
| |
| public PurgeFunction(int nowInSec, int gcBefore, int oldestUnrepairedTombstone, boolean onlyPurgeRepairedTombstones, |
| boolean enforceStrictLiveness) |
| { |
| this.nowInSec = nowInSec; |
| this.purger = (timestamp, localDeletionTime) -> |
| !(onlyPurgeRepairedTombstones && localDeletionTime >= oldestUnrepairedTombstone) |
| && (localDeletionTime < gcBefore || ignoreGcGraceSeconds) |
| && getPurgeEvaluator().test(timestamp); |
| this.enforceStrictLiveness = enforceStrictLiveness; |
| } |
| |
| protected abstract LongPredicate getPurgeEvaluator(); |
| |
| // Called at the beginning of each new partition |
| protected void onNewPartition(DecoratedKey partitionKey) |
| { |
| } |
| |
| // Called for each partition that had only purged infos and are empty post-purge. |
| protected void onEmptyPartitionPostPurge(DecoratedKey partitionKey) |
| { |
| } |
| |
| // Called for every unfiltered. Meant for CompactionIterator to update progress |
| protected void updateProgress() |
| { |
| } |
| |
| // Called at the beginning of each new partition |
| // Return true if the current partitionKey ignores the gc_grace_seconds during compaction. |
| protected boolean shouldIgnoreGcGrace() |
| { |
| return false; |
| } |
| |
| protected void setReverseOrder(boolean isReverseOrder) |
| { |
| this.isReverseOrder = isReverseOrder; |
| } |
| |
| @Override |
| @SuppressWarnings("resource") |
| protected UnfilteredRowIterator applyToPartition(UnfilteredRowIterator partition) |
| { |
| onNewPartition(partition.partitionKey()); |
| |
| ignoreGcGraceSeconds = shouldIgnoreGcGrace(); |
| |
| setReverseOrder(partition.isReverseOrder()); |
| UnfilteredRowIterator purged = Transformation.apply(partition, this); |
| if (purged.isEmpty()) |
| { |
| onEmptyPartitionPostPurge(purged.partitionKey()); |
| purged.close(); |
| return null; |
| } |
| |
| return purged; |
| } |
| |
| @Override |
| protected DeletionTime applyToDeletion(DeletionTime deletionTime) |
| { |
| return purger.shouldPurge(deletionTime) ? DeletionTime.LIVE : deletionTime; |
| } |
| |
| @Override |
| protected Row applyToStatic(Row row) |
| { |
| updateProgress(); |
| return row.purge(purger, nowInSec, enforceStrictLiveness); |
| } |
| |
| @Override |
| protected Row applyToRow(Row row) |
| { |
| updateProgress(); |
| return row.purge(purger, nowInSec, enforceStrictLiveness); |
| } |
| |
| @Override |
| protected RangeTombstoneMarker applyToMarker(RangeTombstoneMarker marker) |
| { |
| updateProgress(); |
| boolean reversed = isReverseOrder; |
| if (marker.isBoundary()) |
| { |
| // We can only skip the whole marker if both deletion time are purgeable. |
| // If only one of them is, filterTombstoneMarker will deal with it. |
| RangeTombstoneBoundaryMarker boundary = (RangeTombstoneBoundaryMarker)marker; |
| boolean shouldPurgeClose = purger.shouldPurge(boundary.closeDeletionTime(reversed)); |
| boolean shouldPurgeOpen = purger.shouldPurge(boundary.openDeletionTime(reversed)); |
| |
| if (shouldPurgeClose) |
| { |
| if (shouldPurgeOpen) |
| return null; |
| |
| return boundary.createCorrespondingOpenMarker(reversed); |
| } |
| |
| return shouldPurgeOpen |
| ? boundary.createCorrespondingCloseMarker(reversed) |
| : marker; |
| } |
| else |
| { |
| return purger.shouldPurge(((RangeTombstoneBoundMarker)marker).deletionTime()) ? null : marker; |
| } |
| } |
| } |