| /* |
| * 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.cql3.statements; |
| |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.google.common.collect.HashMultiset; |
| import com.google.common.collect.Maps; |
| |
| import org.apache.cassandra.db.ConsistencyLevel; |
| import org.apache.cassandra.db.CounterMutation; |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.db.IMutation; |
| import org.apache.cassandra.db.Mutation; |
| import org.apache.cassandra.db.RegularAndStaticColumns; |
| import org.apache.cassandra.db.commitlog.CommitLogSegment; |
| import org.apache.cassandra.db.partitions.PartitionUpdate; |
| import org.apache.cassandra.db.virtual.VirtualMutation; |
| import org.apache.cassandra.net.MessagingService; |
| import org.apache.cassandra.schema.TableMetadata; |
| |
| /** |
| * Utility class to collect updates. |
| */ |
| final class SingleTableUpdatesCollector implements UpdatesCollector |
| { |
| /** |
| * the table to be updated |
| */ |
| private final TableMetadata metadata; |
| |
| /** |
| * the columns to update |
| */ |
| private final RegularAndStaticColumns updatedColumns; |
| |
| /** |
| * The number of updated rows per key. |
| */ |
| private final HashMultiset<ByteBuffer> perPartitionKeyCounts; |
| |
| /** |
| * the partition update builders per key |
| */ |
| private final Map<ByteBuffer, PartitionUpdate.Builder> puBuilders; |
| |
| /** |
| * if it is a counter table, we will set this |
| */ |
| private ConsistencyLevel counterConsistencyLevel = null; |
| |
| SingleTableUpdatesCollector(TableMetadata metadata, RegularAndStaticColumns updatedColumns, HashMultiset<ByteBuffer> perPartitionKeyCounts) |
| { |
| this.metadata = metadata; |
| this.updatedColumns = updatedColumns; |
| this.perPartitionKeyCounts = perPartitionKeyCounts; |
| this.puBuilders = Maps.newHashMapWithExpectedSize(perPartitionKeyCounts.size()); |
| } |
| |
| public PartitionUpdate.Builder getPartitionUpdateBuilder(TableMetadata metadata, DecoratedKey dk, ConsistencyLevel consistency) |
| { |
| if (metadata.isCounter()) |
| counterConsistencyLevel = consistency; |
| PartitionUpdate.Builder builder = puBuilders.get(dk.getKey()); |
| if (builder == null) |
| { |
| builder = new PartitionUpdate.Builder(metadata, dk, updatedColumns, perPartitionKeyCounts.count(dk.getKey())); |
| puBuilders.put(dk.getKey(), builder); |
| } |
| return builder; |
| } |
| |
| /** |
| * Returns a collection containing all the mutations. |
| * @return a collection containing all the mutations. |
| */ |
| public List<IMutation> toMutations() |
| { |
| List<IMutation> ms = new ArrayList<>(puBuilders.size()); |
| for (PartitionUpdate.Builder builder : puBuilders.values()) |
| { |
| IMutation mutation; |
| |
| if (metadata.isVirtual()) |
| mutation = new VirtualMutation(builder.build()); |
| else if (metadata.isCounter()) |
| mutation = new CounterMutation(new Mutation(builder.build()), counterConsistencyLevel); |
| else |
| mutation = new Mutation(builder.build()); |
| |
| mutation.validateIndexedColumns(); |
| mutation.validateSize(MessagingService.current_version, CommitLogSegment.ENTRY_OVERHEAD_SIZE); |
| ms.add(mutation); |
| } |
| |
| return ms; |
| } |
| } |