| /* |
| * 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.streaming; |
| |
| import java.util.UUID; |
| |
| /** |
| * StreamTask is an abstraction of the streaming task performed over specific ColumnFamily. |
| */ |
| public abstract class StreamTask |
| { |
| /** StreamSession that this task belongs */ |
| protected final StreamSession session; |
| |
| protected final UUID cfId; |
| |
| protected StreamTask(StreamSession session, UUID cfId) |
| { |
| this.session = session; |
| this.cfId = cfId; |
| } |
| |
| /** |
| * @return total number of files this task receives/streams. |
| */ |
| public abstract int getTotalNumberOfFiles(); |
| |
| /** |
| * @return total bytes expected to receive |
| */ |
| public abstract long getTotalSize(); |
| |
| /** |
| * Abort the task. |
| * Subclass should implement cleaning up resources. |
| */ |
| public abstract void abort(); |
| |
| /** |
| * @return StreamSummary that describes this task |
| */ |
| public StreamSummary getSummary() |
| { |
| return new StreamSummary(cfId, getTotalNumberOfFiles(), getTotalSize()); |
| } |
| } |