| /* |
| * 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; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.db.composites.CellName; |
| import org.apache.cassandra.db.composites.CellNameType; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| import org.apache.cassandra.utils.concurrent.OpOrder; |
| import org.apache.cassandra.utils.memory.AbstractAllocator; |
| import org.apache.cassandra.utils.memory.MemtableAllocator; |
| |
| public class BufferCounterUpdateCell extends BufferCell implements CounterUpdateCell |
| { |
| public BufferCounterUpdateCell(CellName name, long value, long timestamp) |
| { |
| this(name, ByteBufferUtil.bytes(value), timestamp); |
| } |
| |
| public BufferCounterUpdateCell(CellName name, ByteBuffer value, long timestamp) |
| { |
| super(name, value, timestamp); |
| } |
| |
| @Override |
| public Cell withUpdatedName(CellName newName) |
| { |
| return new BufferCounterUpdateCell(newName, value, timestamp); |
| } |
| |
| public long delta() |
| { |
| return value().getLong(value.position()); |
| } |
| |
| @Override |
| public Cell diff(Cell cell) |
| { |
| // Diff is used during reads, but we should never read those columns |
| throw new UnsupportedOperationException("This operation is unsupported on CounterUpdateCell."); |
| } |
| |
| @Override |
| public Cell reconcile(Cell cell) |
| { |
| // No matter what the counter cell's timestamp is, a tombstone always takes precedence. See CASSANDRA-7346. |
| if (cell instanceof DeletedCell) |
| return cell; |
| |
| assert cell instanceof CounterUpdateCell : "Wrong class type."; |
| |
| // The only time this could happen is if a batch ships two increments for the same cell. Hence we simply sum the deltas. |
| return new BufferCounterUpdateCell(name, delta() + ((CounterUpdateCell) cell).delta(), Math.max(timestamp, cell.timestamp())); |
| } |
| |
| @Override |
| public int serializationFlags() |
| { |
| return ColumnSerializer.COUNTER_UPDATE_MASK; |
| } |
| |
| @Override |
| public Cell localCopy(CFMetaData metadata, AbstractAllocator allocator) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Cell localCopy(CFMetaData metadata, MemtableAllocator allocator, OpOrder.Group opGroup) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String getString(CellNameType comparator) |
| { |
| return String.format("%s:%s@%d", comparator.getString(name()), ByteBufferUtil.toLong(value), timestamp()); |
| } |
| } |