| /* |
| * 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.transform; |
| |
| import org.apache.cassandra.db.DeletionTime; |
| import org.apache.cassandra.db.partitions.UnfilteredPartitionIterator; |
| import org.apache.cassandra.db.rows.RangeTombstoneMarker; |
| import org.apache.cassandra.db.rows.UnfilteredRowIterator; |
| import org.apache.cassandra.schema.TableMetadata; |
| |
| /** |
| * A validating transformation that sanity-checks the sequence of RT bounds and boundaries in every partition. |
| * |
| * What we validate, specifically: |
| * - that open markers are only followed by close markers |
| * - that open markers and close markers have equal deletion times |
| * - optionally, that the iterator closes its last RT marker |
| */ |
| public final class RTBoundValidator extends Transformation<UnfilteredRowIterator> |
| { |
| public enum Stage { MEMTABLE, SSTABLE, MERGED, PURGED, PROCESSED } |
| |
| private final Stage stage; |
| private final boolean enforceIsClosed; |
| |
| private RTBoundValidator(Stage stage, boolean enforceIsClosed) |
| { |
| this.stage = stage; |
| this.enforceIsClosed = enforceIsClosed; |
| } |
| |
| public static UnfilteredPartitionIterator validate(UnfilteredPartitionIterator partitions, Stage stage, boolean enforceIsClosed) |
| { |
| return Transformation.apply(partitions, new RTBoundValidator(stage, enforceIsClosed)); |
| } |
| |
| public static UnfilteredRowIterator validate(UnfilteredRowIterator partition, Stage stage, boolean enforceIsClosed) |
| { |
| return Transformation.apply(partition, new RowsTransformation(stage, partition.metadata(), partition.isReverseOrder(), enforceIsClosed)); |
| } |
| |
| @Override |
| public UnfilteredRowIterator applyToPartition(UnfilteredRowIterator partition) |
| { |
| return Transformation.apply(partition, new RowsTransformation(stage, partition.metadata(), partition.isReverseOrder(), enforceIsClosed)); |
| } |
| |
| private final static class RowsTransformation extends Transformation |
| { |
| private final Stage stage; |
| private final TableMetadata metadata; |
| private final boolean isReverseOrder; |
| private final boolean enforceIsClosed; |
| |
| private DeletionTime openMarkerDeletionTime; |
| |
| private RowsTransformation(Stage stage, TableMetadata metadata, boolean isReverseOrder, boolean enforceIsClosed) |
| { |
| this.stage = stage; |
| this.metadata = metadata; |
| this.isReverseOrder = isReverseOrder; |
| this.enforceIsClosed = enforceIsClosed; |
| } |
| |
| @Override |
| public RangeTombstoneMarker applyToMarker(RangeTombstoneMarker marker) |
| { |
| if (null == openMarkerDeletionTime) |
| { |
| // there is no open RT in the stream - we are expecting a *_START_BOUND |
| if (marker.isClose(isReverseOrder)) |
| throw ise("unexpected end bound or boundary " + marker.toString(metadata)); |
| } |
| else |
| { |
| // there is an open RT in the stream - we are expecting a *_BOUNDARY or an *_END_BOUND |
| if (!marker.isClose(isReverseOrder)) |
| throw ise("start bound followed by another start bound " + marker.toString(metadata)); |
| |
| // deletion times of open/close markers must match |
| DeletionTime deletionTime = marker.closeDeletionTime(isReverseOrder); |
| if (!deletionTime.equals(openMarkerDeletionTime)) |
| throw ise("open marker and close marker have different deletion times"); |
| |
| openMarkerDeletionTime = null; |
| } |
| |
| if (marker.isOpen(isReverseOrder)) |
| openMarkerDeletionTime = marker.openDeletionTime(isReverseOrder); |
| |
| return marker; |
| } |
| |
| @Override |
| public void onPartitionClose() |
| { |
| if (enforceIsClosed && null != openMarkerDeletionTime) |
| throw ise("expected all RTs to be closed, but the last one is open"); |
| } |
| |
| private IllegalStateException ise(String why) |
| { |
| String message = |
| String.format("%s UnfilteredRowIterator for %s has an illegal RT bounds sequence: %s", stage, metadata, why); |
| throw new IllegalStateException(message); |
| } |
| } |
| } |