Read mode from db directly instead of the settings

Author: knutwalker

compatibility/4.4/neo4j-kernel-adapter/src/main/java/org/neo4j/gds/compat/_44/SettingProxyImpl.java

@@ -25,6 +25,7 @@
 import org.neo4j.gds.annotation.SuppressForbidden;
 import org.neo4j.gds.compat.DatabaseMode;
 import org.neo4j.gds.compat.SettingProxyApi;
+import org.neo4j.graphdb.GraphDatabaseService;
 import org.neo4j.graphdb.config.Setting;
 
 public class SettingProxyImpl implements SettingProxyApi {
@@ -40,7 +41,7 @@ public <T> Setting<T> setting(org.neo4j.gds.compat.Setting<T> setting) {
     }
 
     @Override
-    public DatabaseMode databaseMode(Config config) {
+    public DatabaseMode databaseMode(Config config, GraphDatabaseService databaseService) {
         var mode = config.get(GraphDatabaseSettings.mode);
         switch (mode) {
             case SINGLE:

compatibility/api/neo4j-kernel-adapter/src/main/java/org/neo4j/gds/compat/SettingProxyApi.java

@@ -20,12 +20,13 @@
 package org.neo4j.gds.compat;
 
 import org.neo4j.configuration.Config;
+import org.neo4j.graphdb.GraphDatabaseService;
 
 public interface SettingProxyApi {
     // public, otherwise checkstyle complains that "'<' is preceded with whitespace."
     public <T> org.neo4j.graphdb.config.Setting<T> setting(Setting<T> setting);
 
-    DatabaseMode databaseMode(Config config);
+    DatabaseMode databaseMode(Config config, GraphDatabaseService databaseService);
 
     void setDatabaseMode(Config config, DatabaseMode databaseMode);
 }

compatibility/common/neo4j-kernel-adapter/src/main/java/org/neo4j/gds/compat/SettingProxy.java

@@ -22,6 +22,7 @@
 import org.jetbrains.annotations.Nullable;
 import org.neo4j.configuration.Config;
 import org.neo4j.configuration.SettingValueParser;
+import org.neo4j.graphdb.GraphDatabaseService;
 
 public final class SettingProxy {
 
@@ -35,8 +36,8 @@ public static <T> Setting.Builder<T> newBuilder(
         return ImmutableSetting.builder(name, parser, defaultValue).convert(IMPL::setting);
     }
 
-    public static DatabaseMode databaseMode(Config config) {
-        return IMPL.databaseMode(config);
+    public static DatabaseMode databaseMode(Config config, GraphDatabaseService databaseService) {
+        return IMPL.databaseMode(config, databaseService);
     }
 
     public static void setDatabaseMode(Config config, DatabaseMode databaseMode) {

proc/common/src/main/java/org/neo4j/gds/preconditions/ClusterRestrictions.java

@@ -31,7 +31,7 @@ private ClusterRestrictions() {}
 
     public static void disallowRunningOnCluster(GraphDatabaseAPI api, String detail) throws IllegalStateException {
         var config = GraphDatabaseApiProxy.resolveDependency(api, Config.class);
-        var neo4jMode = SettingProxy.databaseMode(config);
+        var neo4jMode = SettingProxy.databaseMode(config, api);
         if (neo4jMode != DatabaseMode.SINGLE) {
             throw new IllegalStateException(
                 "The requested operation (" + detail +