| /* |
| * Copyright 2017 HugeGraph Authors |
| * |
| * 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 com.baidu.hugegraph.computer.core.sort.flusher; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.lang.NotImplementedException; |
| |
| import com.baidu.hugegraph.computer.core.combiner.Combiner; |
| import com.baidu.hugegraph.computer.core.store.EntryIterator; |
| import com.baidu.hugegraph.computer.core.store.entry.Pointer; |
| import com.baidu.hugegraph.computer.core.store.KvEntryFileWriter; |
| |
| public interface OuterSortFlusher { |
| |
| /** |
| * Number of path to generate entries iterator in flush method. |
| * This method must be called before flush if sort with subKv. |
| */ |
| default void sources(int sources) { |
| throw new NotImplementedException(); |
| } |
| |
| /** |
| * Combiner entries with the same key. |
| */ |
| default Combiner<Pointer> combiner() { |
| throw new NotImplementedException(); |
| } |
| |
| /** |
| * Combine the list of inputValues, and write the inputKey and combined |
| * result length and results to HgkvDirWriter. |
| * The caller maybe needs to call the sources method before call this |
| * method. |
| */ |
| void flush(EntryIterator entries, KvEntryFileWriter writer) |
| throws IOException; |
| } |