WIP : begin working on gridfs implementation #29

nicolasdejonghe · 2019-05-28T10:01:01Z

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Have you updated the documentation?
Have you added tests for any changed functionality?

Fixes

Fixes #xxxx

Purpose

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Background Context

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cchantep · 2019-05-28T11:57:41Z

.gitignore

+vfs/src/test/resources/gcs-test.json
+vfs/src/test/resources/local.conf
+s3/src/test/resources/local.conf
+.metals


Ce genre de fichier dépendant de l'env de dev/préférences développeur ne doit pas se retrouver ici, mais dans le .git/info/exclude, le .gitignore doit rester commun/agnostique de ce genre de chose

build.sbt

cchantep · 2019-06-03T09:10:53Z

build.sbt

+    },
+    libraryDependencies ++= Seq(
+      "org.reactivemongo" %% "reactivemongo" % "0.1x",
+      "com.typesafe.play" %% "play-json" % playVer.value,


Est-ce qu'on a besoin de cette dépendance ?

cchantep · 2019-06-03T09:10:59Z

build.sbt

+      "org.reactivemongo" %% "reactivemongo" % "0.1x",
+      "com.typesafe.play" %% "play-json" % playVer.value,
+      Dependencies.slf4jApi,
+      "commons-io" % "commons-io" % "2.4" % Test)


cchantep · 2019-06-03T11:25:25Z

build.sbt

-      "com.typesafe.play" %% "play-json" % playVer.value,
-      Dependencies.slf4jApi,
-      "commons-io" % "commons-io" % "2.4" % Test)
+      "org.reactivemongo" %% "reactivemongo" % "0.17"


Ne correspond pas à une version existante : https://search.maven.org/ ou http://reactivemongo.org/

cchantep · 2019-06-06T17:45:38Z

build.sbt

@@ -124,6 +124,7 @@ lazy val gridfs = project.in(file("gridfs")).
  settings(Common.settings: _*).settings(
    name := "benji-gridfs",
    libraryDependencies ++= Seq(
+      Dependencies.slf4jApi,


je ne pense pas que c'est nécessaire

cchantep · 2019-06-06T17:47:06Z

gridfs/src/main/scala/GridFSTransport.scala

+
+final class GridFSTransport() {
+
+  def apply(uri: String, connectionOptions: MongoConnectionOptions) {


Type de retour ? Pour savoir comment créer il faut savoir ce qu'on veut créer et sur quoi ça dépend

cchantep · 2019-06-06T17:51:04Z

gridfs/src/main/scala/GridFSTransport.scala

+    //c'est l'idée, pour l'instant je tatonne encore sur comment récupérer la db de la connexion pour la passer à GridFS(...)
+    MongoConnection.parseURI(uri).map { parsedUri =>
+      val connection = driver.connection(parsedUri, options = connectionOptions)
+      GridFS[BSONSerializationPack.type](conn, "fs")


prefix en paramètre

le transport et même derrière storage et BucketRef et ObjectRef doivent resource la DB au moment des appels/opérations (à partir du nom de DB dans l'URI)

cchantep · 2019-06-12T10:54:34Z

gridfs/src/main/scala/GridFSTransport.scala

 package com.zengularity.benji.gridfs

 import reactivemongo.api.MongoConnection

 import reactivemongo.api.gridfs.GridFS
-import reactivemongo.api.{ BSONSerializationPack, MongoConnectionOptions }
+import reactivemongo.api.BSONSerializationPack
+import scala.concurrent.ExecutionContext.Implicits.global


On n'utilise pas le contexte global, sauf pour des tests (et encore)

cchantep · 2019-06-12T10:56:59Z

gridfs/src/main/scala/GridFSTransport.scala

+    val gridfsdb = for {
+      mongoUri <- Future.fromTry(MongoConnection.parseURI(uri))
+      con = driver.connection(mongoUri)
+      dn <- Future(mongoUri.db.get)


Option.get est un code smell/bas practice

de la même façon qu'il ne faut pas essayer de sortir d'une Future on ne peut pas ignore le contexte optionnelle d'une valeur, il faut travailler avec/dedans (le .get n'aurait jamais dû être exposé dans l'API).

cchantep · 2019-06-12T10:58:52Z

gridfs/src/main/scala/GridFSFactory.scala

+ */
+final class GridFSFactory extends StorageFactory {
+  @SuppressWarnings(Array("org.wartremover.warts.TryPartial"))
+  def apply(injector: Injector, uri: URI): ObjectStorage = {


Copy paste ?

yep, je ne me suis pas encore penché là dessus

cchantep · 2019-06-12T15:31:30Z

gridfs/src/main/scala/GridFSTransport.scala

@@ -7,7 +7,7 @@ import reactivemongo.api.MongoConnection

 import reactivemongo.api.gridfs.GridFS
 import reactivemongo.api.BSONSerializationPack
-import scala.concurrent.ExecutionContext.Implicits.global
+import scala.concurrent._


On évite les import en wildcard, qui peuvent cacher des imports dans la scope implicit, par ailleurs il y a une ligne en dessous pour ce package

cchantep · 2019-06-12T15:33:27Z

gridfs/src/main/scala/GridFSTransport.scala

+        case Some(name) =>
+          con.database(name).map(db =>
+            GridFS[BSONSerializationPack.type](db, prefix))
+        case None => Future.failed(new RuntimeException(s"Couldn't get the db from $mongoUri"))


Si possible utiliser les types d'Exception Benji qui sont dans core

cchantep · 2019-06-13T17:47:55Z

gridfs/src/main/scala/GridFSTransport.scala

+  def apply(uri: String, prefix: String)(implicit ec: ExecutionContext): GridFSTransport = {
+    val driver = new reactivemongo.api.MongoDriver
+
+    val gridfsdb = for {


Il ne faut pas assigner une Future issue de .database(..) (résolution de la DB depuis poil):

It’s generally a good practice not to assign the database and collection references to val (even to lazy val), as it’s better to get a fresh reference each time, to automatically recover from any previous issues (e.g. network failure).
http://reactivemongo.org/releases/0.1x/documentation/tutorial/connect-database.html

cchantep · 2019-06-18T08:21:28Z

gridfs/src/main/scala/GridFSTransport.scala


 import com.zengularity.benji.exception.BenjiUnknownError
+import scala.util.Success


Double import

cchantep · 2019-06-18T08:26:06Z

gridfs/src/main/scala/GridFSTransport.scala

+
+import reactivemongo.api.gridfs.GridFS
+import reactivemongo.api.BSONSerializationPack
+import scala.concurrent.{ ExecutionContext, Future }


Sur la forme, J'essaie de me tenir à un ordre pour les imports, en groupant d'abord les importe JVM/Java classique, après les imports scalalib (import scala...), les imports libs externes (ici reactivemongo), les imports internes/cross pkg (com.zengularity.benji...).

Adaptation des règles javastyle, c'est configurable dans Intellij (Order import)

cchantep · 2019-06-18T08:33:42Z

gridfs/src/main/scala/GridFSTransport.scala

+  def gridfs(prefix: String)(implicit ec: ExecutionContext): Future[GridFS[BSONSerializationPack.type]] = {
+    mongoUri.db match {
+      case Some(name) =>
+        for {


for est utile avec plus d'un <- (map), sinon un .map (plus explicite et concis dans ce cas)

cchantep · 2019-06-18T08:34:12Z

gridfs/src/main/scala/GridFSTransport.scala

+      case Some(name) =>
+        for {
+          db <- connection.database(name)
+          gridfs = GridFS[BSONSerializationPack.type](db, prefix)


Quelle différence entre avoir cette ligne et avoir yield GridFS[BSONSerializationPack.type](db, prefix) ?

cchantep · 2019-06-18T08:35:17Z

gridfs/src/main/scala/GridFSTransport.scala

+        } yield gridfs
+
+      case None =>
+        Future.failed(new BenjiUnknownError(s"Couldn't get the db from $mongoUri"))


La formulation actuelle des erreurs est plutôt "Fails to ..."

cchantep · 2019-06-18T08:37:18Z

gridfs/src/main/scala/GridFSTransport.scala

+      mongoUri <- MongoConnection.parseURI(uri)
+      con = driver.connection(mongoUri)
+    } yield (mongoUri, con)
+    val (mongoUri, connection) = (res.map(_._1), res.map(_._2))


Pourquoi sortir du for à partir de là ?

cchantep · 2019-06-18T08:38:55Z

gridfs/src/main/scala/GridFSTransport.scala

+    val (mongoUri, connection) = (res.map(_._1), res.map(_._2))
+    connection match {
+      case Success(connection) => new Success(GridFSTransport(driver, connection, mongoUri))
+      case Failure(_) => Failure[GridFSTransport](new BenjiUnknownError(s"Couldn't create the connection to $uri"))


Le détails de l'erreur/root cause est perdu (cf https://github.com/zengularity/benji/blob/master/core/src/main/scala/exception/BenjiException.scala#L17 )

cchantep · 2019-06-18T08:39:17Z

gridfs/src/main/scala/GridsFSStorage.scala

+package com.zengularity.benji.gridfs
+
+import com.zengularity.benji.{ Bucket, ObjectStorage }
+import scala.concurrent.ExecutionContext.Implicits.global


cchantep · 2019-06-18T08:41:16Z

gridfs/src/main/scala/GridFSTransport.scala

+    } yield (mongoUri, con)
+    val (mongoUri, connection) = (res.map(_._1), res.map(_._2))
+    connection match {
+      case Success(connection) => new Success(GridFSTransport(driver, connection, mongoUri))


Success est une case class, pas de new (par ailleurs même pour les class on tend à fournir une factory/apply dans companion pour découpler l'init)

cchantep · 2019-06-18T08:41:51Z

gridfs/src/main/scala/GridFSTransport.scala

@@ -0,0 +1,49 @@
+// /*


cchantep · 2019-06-18T08:52:19Z

gridfs/src/main/scala/GridFSTransport.scala

+    val (mongoUri, connection) = (res.map(_._1), res.map(_._2))
+    connection match {
+      case Success(connection) => new Success(GridFSTransport(driver, connection, mongoUri))
+      case Failure(_) => Failure[GridFSTransport](new BenjiUnknownError(s"Couldn't create the connection to $uri"))


Formulation message "Fails to ..."

cchantep · 2019-06-18T10:11:47Z

gridfs/src/main/scala/GridFSTransport.scala


+import reactivemongo.api.MongoConnection


Il y a un import reactivemongo.api.X plus bas => import reactivemongo.api.{ MongoConnection, X}

cchantep · 2019-06-18T10:13:54Z

gridfs/src/main/scala/GridFSTransport.scala

+    } yield (con, mongoUri)
+
+    res match {
+      case Success((connection, mongoUri)) => Success(new GridFSTransport(driver, connection, mongoUri))


Pourquoi sortir le case Success du yield précédent (ce qui au passage instancie/alloue un Tuple2 intermédiaire, même si ça n'est pas grave, est-ce utile ?)

cchantep · 2019-06-18T12:59:19Z

gridfs/src/main/scala/GridFSTransport.scala

-    res match {
-      case Success((connection, mongoUri)) => Success(new GridFSTransport(driver, connection, mongoUri))
-      case Failure(error) => Failure[GridFSTransport](new BenjiUnknownError(s"Fails to create the connection to $uri", Some(error)))
+    res.recoverWith {


recoverWith vs recover

cchantep · 2019-06-20T18:21:45Z

gridfs/src/main/scala/GridFSBucketRef.scala

+
+    filesAndChunksStats.transform {
+      case Success(_) => Success(true)
+      case Failure(_) => Success(false)


Une storage.transport.gridfs(name) ne devrait pas se retrouver ici

begin working on gridfs implementation

6aed298

cchantep reviewed May 28, 2019

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nicolasdejonghe added 2 commits May 29, 2019 11:26

create folder architecture

daff698

added factory for gridfs

2711ffb

cchantep reviewed Jun 3, 2019

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remove useless dependencies from gridfs in buil.sbt

c6b1e2b

cchantep reviewed Jun 3, 2019

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nicolasdejonghe added 2 commits June 3, 2019 13:37

mongoreactive 0.17 => mongoreactive 0.17.0

617ecd3

WIP on gridfstransport

667e18e

cchantep reviewed Jun 6, 2019

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nicolasdejonghe added 2 commits June 11, 2019 14:29

added connection to gridfs db

954ad72

wip on gridfstransport

661d443

cchantep reviewed Jun 12, 2019

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work with option in gridfstransport

da6ee9a

cchantep reviewed Jun 12, 2019

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nicolasdejonghe added 2 commits June 13, 2019 10:11

fix import

7c29a2e

change exception type

c656a44

cchantep reviewed Jun 13, 2019

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WIP refacto

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cchantep reviewed Jun 18, 2019

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nicolasdejonghe added 2 commits June 18, 2019 11:53

remove global execution context

fa86969

refacto

4a6e9d7

cchantep reviewed Jun 18, 2019

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refacto

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cchantep reviewed Jun 18, 2019

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nicolasdejonghe added 2 commits June 20, 2019 16:36

WIP GridfsBucketRef: created exists function

6b4aee1

WIP GridFSBucketRef: created create function

bf33963

cchantep reviewed Jun 20, 2019

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cchantep force-pushed the master branch from 369c153 to cfc1391 Compare April 13, 2020 19:03

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WIP : begin working on gridfs implementation #29

WIP : begin working on gridfs implementation #29

nicolasdejonghe commented May 28, 2019

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		final class GridFSTransport() {

		def apply(uri: String, connectionOptions: MongoConnectionOptions) {


		import com.zengularity.benji.exception.BenjiUnknownError
		import scala.util.Success

WIP : begin working on gridfs implementation #29

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WIP : begin working on gridfs implementation #29

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nicolasdejonghe commented May 28, 2019

Pull Request Checklist

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