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/*
*
* * 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.
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*
*/
package com.ebiznext.comet.config
import java.util.Locale
import com.ebiznext.comet.schema.handlers.StorageHandler
import com.fasterxml.jackson.core.{JsonGenerator, JsonParser}
import com.fasterxml.jackson.databind.annotation.{JsonDeserialize, JsonSerialize}
import com.fasterxml.jackson.databind.{
DeserializationContext,
JsonDeserializer,
JsonSerializer,
SerializerProvider
}
import org.apache.hadoop.fs.Path
/**
* Utilities methods to reference datasets paths
* Datasets paths are constructed as follows :
* - root path defined by the COMET_DATASETS env var or datasets applciation property
* - followed by the area name
* - followed by the the domain name
*/
object DatasetArea {
def path(domain: String, area: String)(implicit settings: Settings) =
new Path(s"${settings.comet.datasets}/$area/$domain")
def path(domainPath: Path, schema: String) = new Path(domainPath, schema)
/**
* datasets waiting to be ingested are stored here
*
* @param domain : Domain Name
* @return Absolute path to the pending folder of domain
*/
def pending(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.pending)
/**
* datasets with a file name that could not match any schema file name pattern in the specified domain
* are marked unresolved by being stored in this folder.
*
* @param domain : Domain name
* @return Absolute path to the pending unresolved folder of domain
*/
def unresolved(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.unresolved)
/**
* Once ingested datasets are archived in this folder.
*
* @param domain : Domain name
* @return Absolute path to the archive folder of domain
*/
def archive(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.archive)
/**
* Datasets of the specified domain currently being ingested are located in this folder
*
* @param domain : Domain name
* @return Absolute path to the ingesting folder of domain
*/
def ingesting(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.ingesting)
/**
* Valid records for datasets the specified domain are stored in this folder.
*
* @param domain : Domain name
* @return Absolute path to the ingesting folder of domain
*/
def accepted(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.accepted)
/**
* Invalid records and the reason why they have been rejected for the datasets of the specified domain are stored in this folder.
*
* @param domain : Domain name
* @return Absolute path to the rejected folder of domain
*/
def rejected(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.rejected)
def metrics(domain: String, schema: String)(implicit settings: Settings): Path = {
val path = settings.comet.metrics.path
new Path(
path
.replace("{domain}", domain)
.replace("{schema}", schema)
)
}
def discreteMetrics(domain: String, schema: String)(implicit settings: Settings): Path = {
new Path(metrics(domain, schema), "discrete")
}
def continuousMetrics(domain: String, schema: String)(implicit settings: Settings): Path = {
new Path(metrics(domain, schema), "continuous")
}
def frequenciesMetrics(domain: String, schema: String)(implicit settings: Settings): Path = {
new Path(metrics(domain, schema), "frequencies")
}
/**
* Default target folder for autojobs applied to datasets in this domain
*
* @param domain : Domain name
* @return Absolute path to the business folder of domain
*/
def business(domain: String)(implicit settings: Settings): Path =
path(domain, settings.comet.area.business)
def metadata(implicit settings: Settings): Path =
new Path(s"${settings.comet.metadata}")
def types(implicit settings: Settings): Path =
new Path(metadata, "types")
def mapping(implicit settings: Settings): Path =
new Path(metadata, "mapping")
def domains(implicit settings: Settings): Path =
new Path(metadata, "domains")
def jobs(implicit settings: Settings): Path =
new Path(metadata, "jobs")
/**
* @param storage
*/
def initMetadata(
storage: StorageHandler
)(implicit settings: Settings): Unit = {
List(metadata, types, domains).foreach(storage.mkdirs)
}
def initDomains(storage: StorageHandler, domains: Iterable[String])(implicit
settings: Settings
): Unit = {
domains.foreach { domain =>
List(pending _, unresolved _, archive _, accepted _, rejected _, business _)
.map(_(domain))
.foreach(storage.mkdirs)
}
}
}
/**
* After going through the data pipeline
* a dataset may be referenced through a Hive table in a Hive Database.
* For each input domain, 3 Hive databases may be created :
* - The rejected database : contains tables referencing rejected records for each schema in the domain
* - The accepted database : contains tables referencing
* - The business database : contains tables where autjob tables are created by default
* - The ciustom database : contains tables where autojob tables are created when a specific area is defined
*/
object StorageArea {
def fromString(value: String)(implicit settings: Settings): StorageArea = {
val lcValue = value.toLowerCase(Locale.ROOT)
lcValue match {
case _ if lcValue == settings.comet.area.rejectedFinal => StorageArea.rejected
case _ if lcValue == settings.comet.area.acceptedFinal => StorageArea.accepted
case _ if lcValue == settings.comet.area.businessFinal => StorageArea.business
case custom => StorageArea.Custom(custom)
}
}
case object rejected extends StorageArea {
def value: String = "rejected"
}
case object accepted extends StorageArea {
def value: String = "accepted"
}
case object business extends StorageArea {
def value: String = "business"
}
final case class Custom(value: String) extends StorageArea
def area(domain: String, area: StorageArea): String = s"${domain}_${area.value}"
}
final class StorageAreaSerializer extends JsonSerializer[StorageArea] {
override def serialize(
value: StorageArea,
gen: JsonGenerator,
serializers: SerializerProvider
): Unit = {
val settings = serializers.getAttribute(classOf[Settings]).asInstanceOf[Settings]
require(settings != null, "the SerializationContext lacks a Settings instance")
val strValue = value match {
case StorageArea.accepted => settings.comet.area.accepted
case StorageArea.rejected => settings.comet.area.rejected
case StorageArea.business => settings.comet.area.business
case StorageArea.Custom(customValue) => customValue
}
gen.writeString(strValue)
}
}
final class StorageAreaDeserializer extends JsonDeserializer[StorageArea] {
override def deserialize(jp: JsonParser, ctx: DeserializationContext): StorageArea = {
val settings = ctx
.findInjectableValue("com.ebiznext.comet.config.Settings", null, null)
.asInstanceOf[Settings]
require(settings != null, "the DeserializationContext lacks a Settings instance")
val value = jp.readValueAs[String](classOf[String])
StorageArea.fromString(value)(settings)
}
}
@JsonSerialize(using = classOf[StorageAreaSerializer])
@JsonDeserialize(using = classOf[StorageAreaDeserializer])
sealed abstract class StorageArea {
def value: String
override def toString: String = value
}
