Serverless Reference Architecture – DZone Cloud

This article is a part of a series that looks at serverless from diverse points of view and provides pragmatic guides that help in adopting serverless architecture, tackling practical challenges in serverless architecture, and discussing how serverless enables reactive event-driven architectures. The articles stay clear of a Cloud provider serverless services, only referring to those … Read more

rust – Why can’t I store a value and a reference to that value in the same struct?

Let’s look at a simple implementation of this: struct Parent { count: u32, } struct Child<‘a> { parent: &’a Parent, } struct Combined<‘a> { parent: Parent, child: Child<‘a>, } impl<‘a> Combined<‘a> { fn new() -> Self { let parent = Parent { count: 42 }; let child = Child { parent: &parent }; Combined { … Read more

c# – I’m gettin Null Reference in Unity and don’t know why

Here is the error NullReferenceException: Object reference not set to an instance of an object Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckReadAndThrow (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) (at :0)Unity.Collections.NativeList`1[T].get_Length() (at Library/PackageCache/com.unity.collections@1.2.4/Unity.Collections/NativeList.cs:227)Unity.Networking.Transport.NetworkDriver+Concurrent.BeginSend (Unity.Networking.Transport.NetworkPipeline pipe, Unity.Networking.Transport.NetworkConnection id, Unity.Networking.Transport.DataStreamWriter& writer, System.Int32 requiredPayloadSize) (at Library/Pache) com.unity.transport@1.1.0/Runtime/NetworkDriver.cs:177)Unity.Networking.Transport.NetworkDriver.BeginSend (Unity.Networking.Transport.NetworkConnection id, Unity.Networking.Transport.DataStreamWriter& writer, System.Int32 requiredPayloadSize) (at Library/PackageCache/com.unity.transport@1.1.0/Runtime /NetworkDriver.cs:1210)Server.SendToClient (Unity.Networking.Transport.NetworkConnection connection, NetMessage msg) (at Assets/Scripts/Net/Server.cs:196) Chessboard.OnWelcomeServer (NetMessage msg, Unity.Networking.Transport.NetworkConnection cnn) (at Assets). … Read more

c# – Locating calling code when it is not listed in the call stack (to solve null reference exception)

I have the following error System.NullReferenceException HResult=0x80004003 Message=Object reference not set to an instance of an object. Source=DevExpress.Persistent.BaseImpl.EFCore.v22.1 StackTrace: at DevExpress.Persistent.BaseImpl.EFCore.AuditTrail.AuditDataItem.UpdateDefaultString(IEFCoreWeakReference objectForUpdate, EntityEntry entityEntry, Object key) in DevExpress.PersistentDevExpress.Persistent.BaseImpl.EFCoreAuditTrailAuditDataItem.cs:line 99 The complete call stack is DevExpress.Persistent.BaseImpl.EFCore.v22.1.dll!DevExpress.Persistent.BaseImpl.EFCore.AuditTrail.AuditDataItem.UpdateDefaultString(DevExpress.Persistent.BaseImpl.EFCore.IEFCreUpdateFrame object.EntryEntry.UpdateDefaultString) ) Line 99 C# DevExpress.Persistent.BaseImpl.EFCore.v22.1.dll!DevExpress.Persistent.BaseImpl.EFCore.AuditTrail.AuditDataItem.UpdatePersistentData(System.Collections.Generic.Express.Persistre.PakIRemistore.Devent.>) weakReferences) Line 63 C# DevExpress.Persistent.BaseImpl.EFCore.v22.1.dll!DevExpress.Persistent.BaseImpl.EFCore.AuditTrail.AuditDataContainer.AttachAuditData(Microsoft.EntityFrameworkCore.Express.BtextIbConist.73) .v22.1.dll!DevExpress.Persistent.BaseImpl.EFCore.AuditTrail.AuditDataContainer.SaveAuditData(Microsoft.EntityFrameworkCore.DbContext dbContext) Line 59 C# DevExpress.Persistent.CordImpl.Express2. istent.BaseImpl.EFCore.AuditTrail.AuditTrailService.AuditedDbContext_SavedChanges(object sender, Microsoft.EntityFrameworkCore.SavedChangesEventArgs … Read more

node.js – Mocha after all hook throwing error but functioning correctly – Uncaught Reference error

I am new to testing, and I am using Mocha, Chai and Supertest to write unit tests for my ExpressJS application. My tests are all working – even the hooks that throw errors are functioning as expected, which is why I am so confused. I am getting the error Uncaught ReferenceError: deleted is not defined … Read more

java – Caling a clickListener inside a clickListener return error null object reference error

I’m getting the error [Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference] on running the below code and from Logcat I checked the error is at line when calling the setOnClickListener() on the button id “problmBtn” at line 47 package com.royslab.recview; import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.app.Dialog; import android.os.Bundle; … Read more

android – ViewBind Imports in Build.gradle Not Working [Kotlin] Compile_Incremental_With_Artifact_Transform , Unresolved reference: synthetic

I had a perfectly running android app before I updated the sdk or gradle. I was using id ‘kotlin-android’ id ‘kotlin-android-extensions’ In my plugins section in build.gradle(:app) and it was working fine up until yesterday. I got an error message that told me it was deprecated, so I updated to the appropriate imports to no … Read more

Kotlin – How to reference this.context in a fragment?

I am implementing fragments to an app in android studio. In my Home fragment, I have a function which requires this.context or main activity context. class Home : Fragment() { private lateinit var fusedLocationProviderClient: FusedLocationProviderClient private lateinit var fragmentHomeBinding: FragmentHomeBinding @SuppressLint(“WrongViewCast”) override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { fragmentHomeBinding = DataBindingUtil.inflate(inflater, … Read more

android – SearchView adapter – ‘java.lang.Object[] java.util.Collection.toArray()’ on a null object reference

I have trouble searching my data from the remote server to my RecyclerView. It is showing the above-mentioned error, and the app crashes as soon as I Search from the list. I have highlighted the functions where the error occurs in log cat. I also mentioned where is the function in my classes. Adapter Classes:- … Read more