| /* |
| * 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.drill.exec.store; |
| |
| import org.apache.drill.exec.record.VectorAccessible; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| public interface StatisticsRecordWriter extends StatisticsRecordCollector { |
| |
| /** |
| * Initialize the writer. |
| * |
| * @param writerOptions Contains key, value pair of settings. |
| * @throws IOException |
| */ |
| void init(Map<String, String> writerOptions); |
| |
| /** |
| * Update the schema in RecordWriter. Called at least once before starting writing the records. |
| * @param batch |
| * @throws IOException |
| */ |
| void updateSchema(VectorAccessible batch); |
| |
| /** |
| * Check if the writer should start a new partition, and if so, start a new partition |
| */ |
| public void checkForNewPartition(int index); |
| |
| /** |
| * Returns if the writer is a blocking writer i.e. consumes all input before writing it out |
| * @return TRUE, if writer is blocking. FALSE, otherwise |
| */ |
| boolean isBlockingWriter(); |
| |
| /** |
| * For a blocking writer, called after processing all the records to flush out the writes |
| * @throws IOException |
| */ |
| void flushBlockingWriter() throws IOException; |
| void abort(); |
| void cleanup(); |
| } |