/
S3CollectionReader.scala
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/
S3CollectionReader.scala
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/*
* Copyright 2016 Azavea
*
* Licensed 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 geotrellis.store.s3
import geotrellis.layer._
import geotrellis.store.avro.codecs.KeyValueRecordCodec
import geotrellis.store.index.MergeQueue
import geotrellis.store.avro.{AvroEncoder, AvroRecordCodec}
import geotrellis.store.util.{IOUtils => GTIOUtils}
import geotrellis.util.conf.BlockingThreadPoolConfig
import software.amazon.awssdk.services.s3.model._
import software.amazon.awssdk.services.s3.S3Client
import org.apache.avro.Schema
import org.apache.commons.io.IOUtils
class S3CollectionReader(
val getClient: () => S3Client = S3ClientProducer.get
) {
def read[
K: AvroRecordCodec: Boundable,
V: AvroRecordCodec
](
bucket: String,
keyPath: BigInt => String,
queryKeyBounds: Seq[KeyBounds[K]],
decomposeBounds: KeyBounds[K] => Seq[(BigInt, BigInt)],
filterIndexOnly: Boolean,
writerSchema: Option[Schema] = None,
threads: Int = BlockingThreadPoolConfig.threads
): Seq[(K, V)] = {
if (queryKeyBounds.isEmpty) return Seq.empty[(K, V)]
val ranges = if (queryKeyBounds.length > 1)
MergeQueue(queryKeyBounds.flatMap(decomposeBounds))
else
queryKeyBounds.flatMap(decomposeBounds)
val recordCodec = KeyValueRecordCodec[K, V]
val s3client = getClient()
GTIOUtils.parJoin[K, V](ranges.toIterator, threads){ index: BigInt =>
try {
val getRequest = GetObjectRequest.builder()
.bucket(bucket)
.key(keyPath(index))
.build()
val s3obj = s3client.getObject(getRequest)
val bytes = IOUtils.toByteArray(s3obj)
s3obj.close()
val recs = AvroEncoder.fromBinary(writerSchema.getOrElse(recordCodec.schema), bytes)(recordCodec)
if (filterIndexOnly) recs
else recs.filter { row => queryKeyBounds.includeKey(row._1) }
} catch {
case e: S3Exception if e.statusCode == 404 => Vector.empty
}
}: Seq[(K, V)]
}
}