| /* |
| * 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.dht; |
| |
| import java.util.Set; |
| |
| import org.apache.cassandra.db.SystemKeyspace; |
| import org.apache.cassandra.streaming.StreamEvent; |
| import org.apache.cassandra.streaming.StreamEventHandler; |
| import org.apache.cassandra.streaming.StreamRequest; |
| import org.apache.cassandra.streaming.StreamState; |
| |
| /** |
| * Store and update available ranges (data already received) to system keyspace. |
| */ |
| public class StreamStateStore implements StreamEventHandler |
| { |
| public Set<Range<Token>> getAvailableRanges(String keyspace, IPartitioner partitioner) |
| { |
| return SystemKeyspace.getAvailableRanges(keyspace, partitioner); |
| } |
| |
| /** |
| * Check if given token's data is available in this node. |
| * |
| * @param keyspace keyspace name |
| * @param token token to check |
| * @return true if given token in the keyspace is already streamed and ready to be served. |
| */ |
| public boolean isDataAvailable(String keyspace, Token token) |
| { |
| Set<Range<Token>> availableRanges = getAvailableRanges(keyspace, token.getPartitioner()); |
| for (Range<Token> range : availableRanges) |
| { |
| if (range.contains(token)) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * When StreamSession completes, make all keyspaces/ranges in session available to be served. |
| * |
| * @param event Stream event. |
| */ |
| @Override |
| public void handleStreamEvent(StreamEvent event) |
| { |
| if (event.eventType == StreamEvent.Type.STREAM_COMPLETE) |
| { |
| StreamEvent.SessionCompleteEvent se = (StreamEvent.SessionCompleteEvent) event; |
| if (se.success) |
| { |
| for (StreamRequest request : se.requests) |
| { |
| SystemKeyspace.updateAvailableRanges(request.keyspace, request.ranges); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void onSuccess(StreamState streamState) {} |
| |
| @Override |
| public void onFailure(Throwable throwable) {} |
| } |