| /* |
| * 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.notifications; |
| |
| import java.util.Optional; |
| |
| import javax.annotation.Nullable; |
| |
| import org.apache.cassandra.db.memtable.Memtable; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| |
| /** |
| * Notification sent after SSTables are added to their {@link org.apache.cassandra.db.ColumnFamilyStore}. |
| */ |
| public class SSTableAddedNotification implements INotification |
| { |
| /** The added SSTables */ |
| public final Iterable<SSTableReader> added; |
| |
| /** The memtable from which the tables come when they have been added due to a flush, {@code null} otherwise. */ |
| @Nullable |
| private final Memtable memtable; |
| |
| /** |
| * Creates a new {@code SSTableAddedNotification} for the specified SSTables and optional memtable. |
| * |
| * @param added the added SSTables |
| * @param memtable the memtable from which the tables come when they have been added due to a memtable flush, |
| * or {@code null} if they don't come from a flush |
| */ |
| public SSTableAddedNotification(Iterable<SSTableReader> added, @Nullable Memtable memtable) |
| { |
| this.added = added; |
| this.memtable = memtable; |
| } |
| |
| /** |
| * Returns the memtable from which the tables come when they have been added due to a memtable flush. If not, an |
| * empty Optional should be returned. |
| * |
| * @return the origin memtable in case of a flush, {@link Optional#empty()} otherwise |
| */ |
| public Optional<Memtable> memtable() |
| { |
| return Optional.ofNullable(memtable); |
| } |
| } |