server: Update BlockEventsProcessor to return detailed results

server/app/com/xsn/explorer/processors/BlockEventsProcessor.scala

@@ -26,6 +26,8 @@ class BlockEventsProcessor @Inject() (
     databaseSeeder: DatabaseFutureSeeder,
     blockDataHandler: BlockFutureDataHandler) {
 
+  import BlockEventsProcessor._
+
   private val logger = LoggerFactory.getLogger(this.getClass)
 
   /**
@@ -44,12 +46,12 @@ class BlockEventsProcessor @Inject() (
    *
    * @param blockhash the new latest block
    */
-  def newLatestBlock(blockhash: Blockhash): FutureApplicationResult[Block] = {
+  def newLatestBlock(blockhash: Blockhash): FutureApplicationResult[Result] = {
     val result = for {
       block <- xsnService.getBlock(blockhash).toFutureOr
       transactions <- block.transactions.map(getTransaction).toFutureOr
       r <- newLatestBlock(block, transactions).toFutureOr
-    } yield block
+    } yield r
 
     result.toFuture
   }
@@ -74,8 +76,8 @@ class BlockEventsProcessor @Inject() (
     result.toFuture
   }
 
-  private def newLatestBlock(newBlock: Block, newTransactions: List[Transaction]): FutureApplicationResult[Unit] = {
-    def onRechain(orphanBlock: Block): FutureApplicationResult[Unit] = {
+  private def newLatestBlock(newBlock: Block, newTransactions: List[Transaction]): FutureApplicationResult[Result] = {
+    def onRechain(orphanBlock: Block): FutureApplicationResult[Result] = {
       val result = for {
         orphanTransactions <- orphanBlock.transactions.map(getTransaction).toFutureOr
 
@@ -85,36 +87,47 @@ class BlockEventsProcessor @Inject() (
           newBlock = newBlock,
           newTransactions = newTransactions)
         _ <- databaseSeeder.replaceLatestBlock(command).toFutureOr
-      } yield ()
+      } yield RechainDone(orphanBlock, newBlock)
 
       result.toFuture
     }
 
-    def onFirstBlock: FutureApplicationResult[Unit] = {
+    def onFirstBlock: FutureApplicationResult[Result] = {
       logger.info(s"first block = ${newBlock.hash.string}")
 
       val command = DatabaseSeeder.CreateBlockCommand(newBlock, newTransactions)
       databaseSeeder.firstBlock(command)
+          .toFutureOr
+          .map(_ => FirstBlockCreated(newBlock))
+          .toFuture
     }
 
-    def onNewBlock(latestBlock: Block): FutureApplicationResult[Unit] = {
+    def onNewBlock(latestBlock: Block): FutureApplicationResult[Result] = {
       logger.info(s"existing latest block = ${latestBlock.hash.string} -> new latest block = ${newBlock.hash.string}")
 
       val command = DatabaseSeeder.CreateBlockCommand(newBlock, newTransactions)
-      databaseSeeder.newLatestBlock(command)
+      databaseSeeder
+          .newLatestBlock(command)
+          .toFutureOr
+          .map(_ => NewBlockAppended(newBlock))
+          .toFuture
     }
 
-    def onMissingBlock(): FutureApplicationResult[Unit] = {
+    def onMissingBlock(): FutureApplicationResult[Result] = {
       blockDataHandler
           .getBy(newBlock.hash)
           .flatMap {
             case Good(_) =>
               logger.info(s"The block ${newBlock.hash.string} is not missing but duplicated, ignoring")
-              Future.successful { Good(()) }
+              Future.successful { Good(ExistingBlockIgnored(newBlock)) }
 
             case Bad(One(BlockNotFoundError)) =>
               val command = DatabaseSeeder.CreateBlockCommand(newBlock, newTransactions)
-              databaseSeeder.insertPendingBlock(command)
+              databaseSeeder
+                  .insertPendingBlock(command)
+                  .toFutureOr
+                  .map(_ => MissingBlockProcessed(newBlock))
+                  .toFuture
 
             case Bad(errors) =>
               Future.successful(Bad(errors))
@@ -131,12 +144,12 @@ class BlockEventsProcessor @Inject() (
           }
           .toFutureOr
 
-      _ <- latestBlockMaybe
+      r <- latestBlockMaybe
             .map { latestBlock =>
               if (newBlock.hash == latestBlock.hash) {
                 // duplicated msg
                 logger.info(s"ignoring duplicated latest block = ${newBlock.hash.string}")
-                Future.successful(Good(()))
+                Future.successful(Good(ExistingBlockIgnored(newBlock)))
               } else if (newBlock.previousBlockhash.contains(latestBlock.hash)) {
                 // latest block -> new block
                 onNewBlock(latestBlock)
@@ -151,8 +164,18 @@ class BlockEventsProcessor @Inject() (
             }
             .getOrElse(onFirstBlock)
             .toFutureOr
-    } yield ()
+    } yield r
 
     result.toFuture
   }
 }
+
+object BlockEventsProcessor {
+
+  sealed trait Result
+  case class FirstBlockCreated(block: Block) extends Result
+  case class MissingBlockProcessed(block: Block) extends Result
+  case class ExistingBlockIgnored(block: Block) extends Result
+  case class NewBlockAppended(block: Block) extends Result
+  case class RechainDone(orphanBlock: Block, newBlock: Block) extends Result
+}

server/app/com/xsn/explorer/tasks/SQSSeederTask.scala

@@ -66,7 +66,11 @@ class SQSSeederTask @Inject() (
         case Good(_) =>
           logger.info(s"Block processed successfully = ${blockhash.string}")
           sqs.deleteMessageAsync(config.queueUrl, message.getReceiptHandle)
-          blockSynchronizerTask.sync()
+      }
+
+      result.foreach {
+        case Good(eventResult) => onBlockResult(eventResult)
+        case _ => ()
       }
     }
 
@@ -80,4 +84,18 @@ class SQSSeederTask @Inject() (
         }
         .foreach(onBlockhash)
   }
+
+  private def onBlockResult(eventResult: BlockEventsProcessor.Result) = eventResult match {
+    case BlockEventsProcessor.FirstBlockCreated(block) =>
+      blockSynchronizerTask.sync()
+
+    case BlockEventsProcessor.NewBlockAppended(block) =>
+      blockSynchronizerTask.sync()
+
+    case BlockEventsProcessor.RechainDone(orphanBlock, newBlock) =>
+      blockSynchronizerTask.sync()
+
+    case BlockEventsProcessor.MissingBlockProcessed(block) => ()
+    case BlockEventsProcessor.ExistingBlockIgnored(block) => ()
+  }
 }