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A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* 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;
import org.apache.cassandra.io.sstable.format.SSTableReader;
public class SSTableAddedNotification implements INotification
{
/** The added SSTables */
public final Iterable 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 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()
{
return Optional.ofNullable(memtable);
}
}
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