fix: fix RepositoryUpdater that is not timing out during repository upgrade (DEV-1534)

webapi/src/main/scala/org/knora/webapi/messages/store/triplestoremessages/TriplestoreMessages.scala

@@ -288,6 +288,16 @@ case class DropAllTRepositoryContent() extends TriplestoreRequest
  */
 case class DropAllRepositoryContentACK()
 
+/**
+ * Message for removing all content from the repository.
+ */
+case class DropDataGraphByGraph() extends TriplestoreRequest
+
+/**
+ * Sent as a response to [[DropDataGraphByGraph]] if the request was processed successfully.
+ */
+case class DropDataGraphByGraphACK()
+
 /**
  * Inserts data into the repository.
  *

webapi/src/main/scala/org/knora/webapi/store/triplestore/api/TriplestoreService.scala

@@ -6,21 +6,7 @@ import zio.macros.accessible
 import java.nio.file.Path
 
 import org.knora.webapi._
-import org.knora.webapi.messages.store.triplestoremessages.CheckTriplestoreResponse
-import org.knora.webapi.messages.store.triplestoremessages.DropAllRepositoryContentACK
-import org.knora.webapi.messages.store.triplestoremessages.FileWrittenResponse
-import org.knora.webapi.messages.store.triplestoremessages.InsertGraphDataContentResponse
-import org.knora.webapi.messages.store.triplestoremessages.InsertTriplestoreContentACK
-import org.knora.webapi.messages.store.triplestoremessages.NamedGraphDataResponse
-import org.knora.webapi.messages.store.triplestoremessages.RdfDataObject
-import org.knora.webapi.messages.store.triplestoremessages.RepositoryUploadedResponse
-import org.knora.webapi.messages.store.triplestoremessages.ResetRepositoryContentACK
-import org.knora.webapi.messages.store.triplestoremessages.SparqlAskResponse
-import org.knora.webapi.messages.store.triplestoremessages.SparqlConstructRequest
-import org.knora.webapi.messages.store.triplestoremessages.SparqlConstructResponse
-import org.knora.webapi.messages.store.triplestoremessages.SparqlExtendedConstructRequest
-import org.knora.webapi.messages.store.triplestoremessages.SparqlExtendedConstructResponse
-import org.knora.webapi.messages.store.triplestoremessages.SparqlUpdateResponse
+import org.knora.webapi.messages.store.triplestoremessages._
 import org.knora.webapi.messages.util.rdf.QuadFormat
 import org.knora.webapi.messages.util.rdf.SparqlSelectResult
 
@@ -132,10 +118,15 @@ trait TriplestoreService {
   ): UIO[ResetRepositoryContentACK]
 
   /**
-   * Drops (deletes) all data from the triplestore.
+   * Drops (deletes) all data from the triplestore using "DROP ALL" SPARQL query.
    */
   def dropAllTriplestoreContent(): UIO[DropAllRepositoryContentACK]
 
+  /**
+   * Wipes all triplestore data out using HTTP requests.
+   */
+  def dropDataGraphByGraph(): UIO[DropDataGraphByGraphACK]
+
   /**
    * Inserts the data referenced inside the `rdfDataObjects` by appending it to a default set of `rdfDataObjects`
    * based on the list defined in `application.conf` under the `app.triplestore.default-rdf-data` key.

webapi/src/main/scala/org/knora/webapi/store/triplestore/impl/TriplestoreServiceHttpConnectorImpl.scala

@@ -346,22 +346,57 @@ case class TriplestoreServiceHttpConnectorImpl(
     } yield ResetRepositoryContentACK()
 
   /**
-   * Drops (deletes) all data from the triplestore.
+   * Drops (deletes) all data from the triplestore using "DROP ALL" SPARQL query.
    */
   def dropAllTriplestoreContent(): UIO[DropAllRepositoryContentACK] = {
-
-    val DropAllSparqlString =
-      """
-      DROP ALL
-      """
+    val sparqlQuery = "DROP ALL"
 
     for {
       _      <- ZIO.logDebug("==>> Drop All Data Start")
-      result <- getSparqlHttpResponse(DropAllSparqlString, isUpdate = true)
+      result <- getSparqlHttpResponse(sparqlQuery, isUpdate = true)
       _      <- ZIO.logDebug(s"==>> Drop All Data End, Result: $result")
     } yield DropAllRepositoryContentACK()
   }
 
+  /**
+   * Gets all graphs stored in the triplestore.
+   *
+   * @return All graphs stored in the triplestore as a [[Seq[String]]
+   */
+  def getAllGraphs(): UIO[Seq[String]] = {
+    val sparqlQuery =
+      """|
+         | SELECT DISTINCT ?graph 
+         | WHERE {
+         |  GRAPH ?graph { ?s ?p ?o }
+         | }""".stripMargin
+
+    for {
+      res      <- sparqlHttpSelect(sparqlQuery)
+      bindings <- ZIO.succeed(res.results.bindings)
+      graphs    = bindings.map(_.rowMap("graph"))
+    } yield graphs
+  }
+
+  /**
+   * Drops all triplestore data graph by graph using "DROP GRAPH" SPARQL query.
+   * This method is useful in cases with large amount of data (over 10 million statements),
+   * where the method [[dropAllTriplestoreContent()]] could create timeout issues.
+   */
+  def dropDataGraphByGraph(): UIO[DropDataGraphByGraphACK] = {
+    val sparqlQuery = (graph: String) => s"DROP GRAPH <$graph>"
+
+    for {
+      _      <- ZIO.logInfo("==>> Drop All Data Start")
+      graphs <- getAllGraphs()
+      _ <- ZIO.foreach(graphs)(graph =>
+             getSparqlHttpResponse(sparqlQuery(graph), isUpdate = true)
+               .tap(result => ZIO.logDebug(s"==>> Dropped graph: $graph"))
+           )
+      _ <- ZIO.logInfo("==>> Drop All Data End")
+    } yield DropDataGraphByGraphACK()
+  }
+
   /**
    * Inserts the data referenced inside the `rdfDataObjects` by appending it to a default set of `rdfDataObjects`
    * based on the list defined in `application.conf` under the `app.triplestore.default-rdf-data` key.

webapi/src/main/scala/org/knora/webapi/store/triplestore/upgrade/RepositoryUpdater.scala

@@ -82,9 +82,16 @@ object RepositoryUpdater {
             for {
               // No. Construct the list of updates that it needs.
               _ <-
-                ZIO.logInfo(
-                  s"Repository not up to date. Found: ${foundRepositoryVersion.getOrElse("None")}, Required: $requiredRepositoryVersion"
-                )
+                foundRepositoryVersion match {
+                  case Some(foundRepositoryVersion) =>
+                    ZIO.logInfo(
+                      s"Repository not up to date. Found: $foundRepositoryVersion, Required: $requiredRepositoryVersion"
+                    )
+                  case None =>
+                    ZIO.logWarning(
+                      s"Repository not up to date. Found: None, Required: $requiredRepositoryVersion"
+                    )
+                }
               _               <- deleteTmpDirectories()
               selectedPlugins <- selectPluginsForNeededUpdates(foundRepositoryVersion)
               _ <-
@@ -202,8 +209,7 @@ object RepositoryUpdater {
              )
 
         // Empty the repository.
-        _ <- ZIO.logInfo("Emptying the repository...")
-        _ <- triplestoreService.dropAllTriplestoreContent()
+        _ <- triplestoreService.dropDataGraphByGraph()
 
         // Upload the transformed repository.
         _ <- ZIO.logInfo("Uploading transformed repository data...")