| /* |
| * 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.service.reads.repair; |
| |
| import java.util.List; |
| |
| import org.apache.cassandra.db.Columns; |
| import org.apache.cassandra.db.ConsistencyLevel; |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.db.ReadCommand; |
| import org.apache.cassandra.db.RegularAndStaticColumns; |
| import org.apache.cassandra.db.partitions.UnfilteredPartitionIterators; |
| import org.apache.cassandra.db.rows.UnfilteredRowIterator; |
| import org.apache.cassandra.db.rows.UnfilteredRowIterators; |
| import org.apache.cassandra.locator.Endpoints; |
| import org.apache.cassandra.locator.ReplicaPlan; |
| |
| public class PartitionIteratorMergeListener<E extends Endpoints<E>> |
| implements UnfilteredPartitionIterators.MergeListener |
| { |
| private final ReplicaPlan.ForRead<E> replicaPlan; |
| private final ReadCommand command; |
| private final ReadRepair readRepair; |
| |
| public PartitionIteratorMergeListener(ReplicaPlan.ForRead<E> replicaPlan, ReadCommand command, ReadRepair readRepair) |
| { |
| this.replicaPlan = replicaPlan; |
| this.command = command; |
| this.readRepair = readRepair; |
| } |
| |
| public UnfilteredRowIterators.MergeListener getRowMergeListener(DecoratedKey partitionKey, List<UnfilteredRowIterator> versions) |
| { |
| return new RowIteratorMergeListener<>(partitionKey, columns(versions), isReversed(versions), replicaPlan, command, readRepair); |
| } |
| |
| protected RegularAndStaticColumns columns(List<UnfilteredRowIterator> versions) |
| { |
| Columns statics = Columns.NONE; |
| Columns regulars = Columns.NONE; |
| for (UnfilteredRowIterator iter : versions) |
| { |
| if (iter == null) |
| continue; |
| |
| RegularAndStaticColumns cols = iter.columns(); |
| statics = statics.mergeTo(cols.statics); |
| regulars = regulars.mergeTo(cols.regulars); |
| } |
| return new RegularAndStaticColumns(statics, regulars); |
| } |
| |
| protected boolean isReversed(List<UnfilteredRowIterator> versions) |
| { |
| for (UnfilteredRowIterator iter : versions) |
| { |
| if (iter == null) |
| continue; |
| |
| // Everything will be in the same order |
| return iter.isReverseOrder(); |
| } |
| |
| assert false : "Expected at least one iterator"; |
| return false; |
| } |
| |
| public void close() |
| { |
| } |
| } |
| |