Handle when a file is not found after initial scan (#49)

* [aws-lib] Uploader refactoring

* [aws-lib] Uploader remove redundant braces

* [aws-lib] Uploader start upload inside IO

The upload method starts the upload to S3, so should be within the IO.

* [core] log count of errors

* [aws-lib] Uploader handle errors and count them

aws-lib/src/main/scala/net/kemitix/s3thorp/aws/lib/Uploader.scala

@@ -3,13 +3,16 @@ package net.kemitix.s3thorp.aws.lib
 import cats.effect.IO
 import com.amazonaws.event.{ProgressEvent, ProgressEventType, ProgressListener}
 import com.amazonaws.services.s3.model.PutObjectRequest
+import com.amazonaws.services.s3.transfer.model.UploadResult
 import com.amazonaws.services.s3.transfer.{TransferManager => AmazonTransferManager}
-import net.kemitix.s3thorp.aws.api.S3Action.UploadS3Action
+import net.kemitix.s3thorp.aws.api.S3Action.{ErroredS3Action, UploadS3Action}
 import net.kemitix.s3thorp.aws.api.UploadEvent.{ByteTransferEvent, RequestEvent, TransferEvent}
 import net.kemitix.s3thorp.aws.api.{S3Action, UploadProgressListener}
 import net.kemitix.s3thorp.aws.lib.UploaderLogging.{logMultiPartUploadFinished, logMultiPartUploadStart}
 import net.kemitix.s3thorp.domain.{Bucket, LocalFile, MD5Hash, RemoteKey}
 
+import scala.util.Try
+
 class Uploader(transferManager: => AmazonTransferManager) {
 
   def accepts(localFile: LocalFile)
@@ -23,21 +26,32 @@ class Uploader(transferManager: => AmazonTransferManager) {
              tryCount: Int,
              maxRetries: Int)
             (implicit info: Int => String => IO[Unit],
-             warn: String => IO[Unit]): IO[S3Action] = {
+             warn: String => IO[Unit]): IO[S3Action] =
     for {
       _ <- logMultiPartUploadStart(localFile, tryCount)
-      listener = progressListener(uploadProgressListener)
-      putObjectRequest = request(localFile, bucket, listener)
-      upload = transferManager.upload(putObjectRequest)
-      result <- IO{upload.waitForUploadResult}
+      upload <- upload(localFile, bucket, uploadProgressListener)
       _ <- logMultiPartUploadFinished(localFile)
-    } yield UploadS3Action(RemoteKey(result.getKey), MD5Hash(result.getETag))
+    } yield upload match {
+      case Right(r) => UploadS3Action(RemoteKey(r.getKey), MD5Hash(r.getETag))
+      case Left(e) => ErroredS3Action(localFile.remoteKey, e)
     }
 
-  private def request(localFile: LocalFile, bucket: Bucket, listener: ProgressListener): PutObjectRequest = {
+  private def upload(localFile: LocalFile,
+                     bucket: Bucket,
+                     uploadProgressListener: UploadProgressListener,
+                    ): IO[Either[Throwable, UploadResult]] = {
+    val listener = progressListener(uploadProgressListener)
+    val putObjectRequest = request(localFile, bucket, listener)
+    IO {
+      Try(transferManager.upload(putObjectRequest))
+        .map(_.waitForUploadResult)
+        .toEither
+    }
+  }
+
+  private def request(localFile: LocalFile, bucket: Bucket, listener: ProgressListener): PutObjectRequest =
     new PutObjectRequest(bucket.name, localFile.remoteKey.key, localFile.file)
       .withGeneralProgressListener(listener)
-  }
 
   private def progressListener(uploadProgressListener: UploadProgressListener) =
     new ProgressListener {

core/src/main/scala/net.kemitix.s3thorp.core/Counters.scala

@@ -2,4 +2,5 @@ package net.kemitix.s3thorp.core
 
 final case class Counters(uploaded: Int = 0,
                           deleted: Int = 0,
-                          copied: Int = 0)
+                          copied: Int = 0,
+                          errors: Int = 0)

core/src/main/scala/net.kemitix.s3thorp.core/SyncLogging.scala

@@ -2,13 +2,13 @@ package net.kemitix.s3thorp.core
 
 import cats.effect.IO
 import net.kemitix.s3thorp.aws.api.S3Action
-import net.kemitix.s3thorp.aws.api.S3Action.{CopyS3Action, DeleteS3Action, UploadS3Action}
+import net.kemitix.s3thorp.aws.api.S3Action.{CopyS3Action, DeleteS3Action, ErroredS3Action, UploadS3Action}
 import net.kemitix.s3thorp.domain.Config
 
 // Logging for the Sync class
 object SyncLogging {
 
-  def logRunStart[F[_]](info: Int => String => IO[Unit])
+  def logRunStart(info: Int => String => IO[Unit])
                        (implicit c: Config): IO[Unit] =
     info(1)(s"Bucket: ${c.bucket.name}, Prefix: ${c.prefix.key}, Source: ${c.source}, ")
 
@@ -25,6 +25,7 @@ object SyncLogging {
       _ <- info(1)(s"Uploaded ${counters.uploaded} files")
       _ <- info(1)(s"Copied   ${counters.copied} files")
       _ <- info(1)(s"Deleted  ${counters.deleted} files")
+      _ <- info(1)(s"Errors   ${counters.errors}")
     } yield ()
 
   private def countActivities(implicit c: Config): (Counters, S3Action) => Counters =
@@ -36,6 +37,8 @@ object SyncLogging {
           counters.copy(copied = counters.copied + 1)
         case _: DeleteS3Action =>
           counters.copy(deleted = counters.deleted + 1)
+        case ErroredS3Action(k, e) =>
+          counters.copy(errors = counters.errors + 1)
         case _ => counters
       }
     }