/
S3COGCollectionLayerReader.scala
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/
S3COGCollectionLayerReader.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.spark.io.s3.cog
import geotrellis.raster.CellGrid
import geotrellis.raster.io.geotiff.reader.GeoTiffReader
import geotrellis.spark._
import geotrellis.spark.io._
import geotrellis.spark.io.cog._
import geotrellis.spark.io.index._
import geotrellis.spark.io.s3._
import geotrellis.util._
import com.typesafe.config.ConfigFactory
import spray.json.JsonFormat
import java.net.URI
import scala.reflect.ClassTag
/**
* Handles reading raster RDDs and their metadata from S3.
*
* @param attributeStore AttributeStore that contains metadata for corresponding LayerId
*/
class S3COGCollectionLayerReader(
val attributeStore: AttributeStore,
val bucket: String,
val prefix: String,
val getS3Client: () => S3Client = () => S3Client.DEFAULT,
val defaultThreads: Int = S3COGCollectionLayerReader.defaultThreadCount
) extends COGCollectionLayerReader[LayerId] with LazyLogging {
implicit def getByteReader(uri: URI): ByteReader = byteReader(uri, getS3Client())
def read[
K: SpatialComponent: Boundable: JsonFormat: ClassTag,
V <: CellGrid: GeoTiffReader: ClassTag
](id: LayerId, rasterQuery: LayerQuery[K, TileLayerMetadata[K]]) = {
def getKeyPath(zoomRange: ZoomRange, maxWidth: Int): BigInt => String =
(index: BigInt) =>
s"$bucket/$prefix/${id.name}/" +
s"${zoomRange.minZoom}_${zoomRange.maxZoom}/" +
s"${Index.encode(index, maxWidth)}.${Extension}"
baseRead[K, V](
id = id,
tileQuery = rasterQuery,
getKeyPath = getKeyPath,
pathExists = { s3PathExists(_, getS3Client()) },
fullPath = { path => new URI(s"s3://$path") },
defaultThreads = defaultThreads
)
}
}
object S3COGCollectionLayerReader {
lazy val defaultThreadCount: Int = ConfigFactory.load().getThreads("geotrellis.s3.threads.collection.read")
def apply(attributeStore: S3AttributeStore): S3COGCollectionLayerReader =
new S3COGCollectionLayerReader(
attributeStore,
attributeStore.bucket,
attributeStore.prefix,
() => attributeStore.s3Client
)
}