From 8b75a79ca098b7df43b0a52618ebd71093b91926 Mon Sep 17 00:00:00 2001
From: Gemma Lamont <gemma.lamont@neotechnology.com>
Date: Mon, 25 Sep 2023 13:05:36 +0200
Subject: [PATCH] [3X06NMak] Update Scan to PartitionedScan as Scan is
 deprecated

---
 .../MultiThreadedGlobalGraphOperations.java   | 22 +++++++++++--------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/common/src/main/java/apoc/util/kernel/MultiThreadedGlobalGraphOperations.java b/common/src/main/java/apoc/util/kernel/MultiThreadedGlobalGraphOperations.java
index db6213804..1549c8fde 100644
--- a/common/src/main/java/apoc/util/kernel/MultiThreadedGlobalGraphOperations.java
+++ b/common/src/main/java/apoc/util/kernel/MultiThreadedGlobalGraphOperations.java
@@ -27,9 +27,9 @@
 
 import org.neo4j.internal.kernel.api.NodeCursor;
 import org.neo4j.internal.kernel.api.Read;
-import org.neo4j.internal.kernel.api.Scan;
-import org.neo4j.internal.kernel.api.security.AccessMode;
+import org.neo4j.internal.kernel.api.PartitionedScan;
 import org.neo4j.internal.kernel.api.security.LoginContext;
+import org.neo4j.kernel.api.ExecutionContext;
 import org.neo4j.kernel.api.KernelTransaction;
 import org.neo4j.kernel.impl.coreapi.InternalTransaction;
 import org.neo4j.kernel.internal.GraphDatabaseAPI;
@@ -41,8 +41,8 @@ public static BatchJobResult forAllNodes(GraphDatabaseAPI db, ExecutorService ex
         AtomicInteger processing = new AtomicInteger();
         try ( InternalTransaction tx = db.beginTransaction( KernelTransaction.Type.EXPLICIT, LoginContext.AUTH_DISABLED ) ) {
             KernelTransaction ktx = tx.kernelTransaction();
-            Function<Read, Scan<NodeCursor>> scanFunction = Read::allNodesScan;
-            Scan<NodeCursor> scan = scanFunction.apply( ktx.dataRead() );
+            Read dataRead = ktx.dataRead();
+            PartitionedScan<NodeCursor> scan = dataRead.allNodesScan(1, ktx.cursorContext());
             Function<KernelTransaction,NodeCursor> cursorAllocator = ktx2 -> ktx2.cursors().allocateNodeCursor( ktx2.cursorContext() );
             executorService.submit( new BatchJob( scan, batchSize, db, consumer, result, cursorAllocator, executorService, processing ) );
         }
@@ -80,7 +80,7 @@ public long getFailures() {
     }
 
     private static class BatchJob implements Callable<Void> {
-        private final Scan<NodeCursor> scan;
+        private final PartitionedScan<NodeCursor> scan;
         private final int batchSize;
         private final GraphDatabaseAPI db;
         private final Consumer<NodeCursor> consumer;
@@ -89,7 +89,7 @@ private static class BatchJob implements Callable<Void> {
         private final ExecutorService executorService;
         private final AtomicInteger processing;
 
-        public BatchJob(Scan<NodeCursor> scan, int batchSize, GraphDatabaseAPI db, Consumer<NodeCursor> consumer,
+        public BatchJob(PartitionedScan<NodeCursor> scan, int batchSize, GraphDatabaseAPI db, Consumer<NodeCursor> consumer,
                 BatchJobResult result, Function<KernelTransaction,NodeCursor> cursorAllocator, ExecutorService executorService, AtomicInteger processing ) {
             this.scan = scan;
             this.batchSize = batchSize;
@@ -106,17 +106,21 @@ public BatchJob(Scan<NodeCursor> scan, int batchSize, GraphDatabaseAPI db, Consu
         public Void call() {
             try (InternalTransaction tx = db.beginTransaction(KernelTransaction.Type.EXPLICIT, LoginContext.AUTH_DISABLED)) {
                 KernelTransaction ktx = tx.kernelTransaction();
+                ktx.acquireStatement();
+                ExecutionContext executionContext = ktx.createExecutionContext();
                 try ( NodeCursor cursor = cursorAllocator.apply( ktx )) {
-                    if (scan.reserveBatch( cursor, batchSize, ktx.cursorContext(), AccessMode.Static.FULL )) {
+                    while (scan.reservePartition(cursor, executionContext)) {
                         // Branch out so that all available threads will get saturated
-                        executorService.submit( new BatchJob( scan, batchSize, db, consumer, result, cursorAllocator, executorService, processing ) );
-                        executorService.submit( new BatchJob( scan, batchSize, db, consumer, result, cursorAllocator, executorService, processing ) );
+                        executorService.submit(new BatchJob(scan, batchSize, db, consumer, result, cursorAllocator, executorService, processing));
+                        executorService.submit(new BatchJob(scan, batchSize, db, consumer, result, cursorAllocator, executorService, processing));
                         while (processAndReport(cursor)) {
                             // just continue processing...
                         }
                     }
                 }
                 tx.commit();
+                executionContext.complete();
+                executionContext.close();
                 return null;
             } finally {
                 result.batches.incrementAndGet();