| /* |
| * 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.physical.impl.partitionsender; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.drill.exec.compile.TemplateClassDefinition; |
| import org.apache.drill.exec.exception.SchemaChangeException; |
| import org.apache.drill.exec.expr.ClassGenerator; |
| import org.apache.drill.exec.ops.ExchangeFragmentContext; |
| import org.apache.drill.exec.ops.OperatorContext; |
| import org.apache.drill.exec.ops.OperatorStats; |
| import org.apache.drill.exec.physical.config.HashPartitionSender; |
| import org.apache.drill.exec.record.RecordBatch; |
| |
| public interface Partitioner { |
| // Keep the recordCount as (2^x) - 1 to better utilize the memory allocation in ValueVectors; however |
| // other criteria such as batch sizing in terms of actual MBytes rather than record count could also be applied |
| // by the operator. |
| int DEFAULT_RECORD_BATCH_SIZE = (1 << 10) - 1; |
| |
| void setup(ExchangeFragmentContext context, |
| RecordBatch incoming, |
| HashPartitionSender popConfig, |
| OperatorStats stats, |
| OperatorContext oContext, |
| ClassGenerator<?> cg, |
| int start, int count) throws SchemaChangeException; |
| |
| void partitionBatch(RecordBatch incoming) throws IOException; |
| void flushOutgoingBatches(boolean isLastBatch, boolean schemaChanged) throws IOException; |
| void initialize(); |
| void clear(); |
| List<? extends PartitionOutgoingBatch> getOutgoingBatches(); |
| |
| /** |
| * Get PartitionOutgoingBatch based on the fact that there can be > 1 Partitioner |
| * @param index |
| * @return PartitionOutgoingBatch that matches index within Partitioner. This method can |
| * return null if index does not fall within boundary of this Partitioner |
| */ |
| PartitionOutgoingBatch getOutgoingBatch(int index); |
| OperatorStats getStats(); |
| |
| TemplateClassDefinition<Partitioner> TEMPLATE_DEFINITION = new TemplateClassDefinition<>(Partitioner.class, PartitionerTemplate.class); |
| } |