| /* |
| * 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.spark.sparksql; |
| |
| import java.util.List; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.spark.data.DataLayer; |
| import org.apache.cassandra.spark.sparksql.filters.PartitionKeyFilter; |
| import org.apache.spark.TaskContext; |
| import org.apache.spark.sql.catalyst.InternalRow; |
| import org.apache.spark.sql.connector.read.InputPartition; |
| import org.apache.spark.sql.connector.read.PartitionReader; |
| import org.apache.spark.sql.connector.read.PartitionReaderFactory; |
| import org.apache.spark.sql.types.StructType; |
| |
| class CassandraPartitionReaderFactory implements PartitionReaderFactory |
| { |
| private static final Logger LOGGER = LoggerFactory.getLogger(CassandraPartitionReaderFactory.class); |
| final DataLayer dataLayer; |
| final StructType requiredSchema; |
| final List<PartitionKeyFilter> partitionKeyFilters; |
| |
| CassandraPartitionReaderFactory(DataLayer dataLayer, |
| StructType requiredSchema, |
| List<PartitionKeyFilter> partitionKeyFilters) |
| { |
| this.dataLayer = dataLayer; |
| this.requiredSchema = requiredSchema; |
| this.partitionKeyFilters = partitionKeyFilters; |
| } |
| |
| @Override |
| public PartitionReader<InternalRow> createReader(InputPartition partition) |
| { |
| int partitionId; |
| if (partition instanceof CassandraInputPartition) |
| { |
| partitionId = ((CassandraInputPartition) partition).getPartitionId(); |
| } |
| else |
| { |
| partitionId = TaskContext.getPartitionId(); |
| LOGGER.warn("InputPartition is not of CassandraInputPartition type. " |
| + "Using TaskContext to determine the partitionId type={}, partitionId={}", |
| partition.getClass().getName(), partitionId); |
| } |
| return new SparkRowIterator(partitionId, dataLayer, requiredSchema, partitionKeyFilters); |
| } |
| } |