Put all locks to one place.

backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/JintScriptEngine.cs

@@ -63,7 +63,7 @@ public sealed class JintScriptEngine : IScriptEngine, IScriptDescriptor
                 context.Complete(JsonMapper.Map(value));
             }));
 
-            var result = Execute(context.Engine, script);
+            var result = Execute(context, script);
 
             return await context.CompleteAsync() ?? JsonMapper.Map(result);
         }
@@ -109,7 +109,7 @@ public sealed class JintScriptEngine : IScriptEngine, IScriptDescriptor
                 }
             }));
 
-            Execute(context.Engine, script);
+            Execute(context, script);
 
             return await context.CompleteAsync() ?? vars.Data!;
         }
@@ -131,7 +131,7 @@ public sealed class JintScriptEngine : IScriptEngine, IScriptDescriptor
                     .Extend(vars, options)
                     .Extend(extensions);
 
-            var result = Execute(context.Engine, script);
+            var result = Execute(context, script);
 
             return JsonMapper.Map(result);
         }
@@ -179,14 +179,11 @@ public sealed class JintScriptEngine : IScriptEngine, IScriptDescriptor
         return new ScriptExecutionContext<T>(engine, ct);
     }
 
-    private JsValue Execute(Engine engine, string script)
+    private JsValue Execute(ScriptExecutionContext context, string script)
     {
-        var program = parser.Parse(script);
+        var parsed = parser.Parse(script);
 
-        lock (engine)
-        {
-            return engine.Evaluate(program);
-        }
+        return context.Evaluate(parsed);
     }
 
     private static Exception MapException(Exception inner)

backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/ScriptExecutionContext.cs

@@ -5,7 +5,9 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
+using Esprima.Ast;
 using Jint;
+using Jint.Native;
 using Squidex.Infrastructure.Tasks;
 
 namespace Squidex.Domain.Apps.Core.Scripting;
@@ -19,6 +21,8 @@ public abstract class ScriptExecutionContext : ScriptContext
         Engine = engine;
     }
 
+    public abstract JsValue Evaluate(Script program);
+
     public abstract void Schedule(Func<IScheduler, CancellationToken, Task> action);
 }
 
@@ -51,6 +55,14 @@ public sealed class ScriptExecutionContext<T> : ScriptExecutionContext, ISchedul
         tcs.TrySetResult(value);
     }
 
+    public override JsValue Evaluate(Script script)
+    {
+        lock (Engine)
+        {
+            return Engine.Evaluate(script);
+        }
+    }
+
     public override void Schedule(Func<IScheduler, CancellationToken, Task> action)
     {
         if (IsCompleted)