singleton Questions
11
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I have some questions regarding the the singleton pattern as documented here:
http://msdn.microsoft.com/en-us/library/ff650316.aspx
The following code is an extract from the article:
using System...
Presentable asked 7/9, 2012 at 10:35
1
A java class was developed to obtain JWT Token using the Singleton pattern.
Following is the overall class template:
import java.text.MessageFormat;
import java.time.Duration;
import java.time.Inst...
Polluted asked 18/4, 2023 at 3:17
14
The Effective Java has the following statement on unit testing singletons
Making a class a singleton can make it difficult to test its clients, as it’s impossible to substitute a mock implementa...
Armoury asked 24/11, 2011 at 12:23
3
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I'm using the get_it package and you get two options for registering Singletons, lazy and I guess "regular" (GetIt.instance.registerLazySingleton and GetIt.instance.registerSingleton respectively) ...
3
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for some reason， I use the toml config instead of the .py config.
then, the singleton nightmare comes, continuously come up with not init, or RecursionError
is there an elegant way to use a python ...
Locular asked 30/6, 2023 at 2:30
7
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I found this explanatory link which states
Ensure a class has one instance, and provide a global point of access
to it.
I recently appeared at an interview and to my surprise it was asked fr...
Canonical asked 27/11, 2014 at 5:41
4
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Effective Java Item 3 (Enforce the singleton property with a private constructor or an enum type) notes that:
Making a class a singleton can make it difficult to test its clients, as it's imposs...
6
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I am working on a large project where I have multiple managers to handle different tasks, I need an only a single object of these managers to be created when I start the app,
I came across this m...
Siddon asked 7/1, 2020 at 10:6
42
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What real (i.e. practical) difference exists between a static class and a singleton pattern?
Both can be invoked without instantiation, both provide only one "Instance" and neither of them is thre...
Edra asked 6/2, 2009 at 8:13
2
Understanding the fact that singleton creates a shared global state, there will be situations where I might want singleton such as redux store/state object.
If I am using ES modules, I can use the...
Lintel asked 30/3, 2018 at 5:46
4
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I want to know when should I exactly use the prototype scope in Spring? I have understood that singleton returns the same object instance if the bean is requested for.
Then why should we consider p...
Bradleybradly asked 23/2, 2014 at 13:48
2
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I'd like to use the Logger library in my app. I only want to instantiate it once so that I have consistent formatting across my app. Also I would like to avoid instantiating PrettyPrinter() several...
5
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I add a singleton like this.
In Startup.cs, I add the following:
services.AddSingleton<MySingleton>();
I want to build my singleton like this (which is not possible of course):
public class ...
Jimjimdandy asked 11/3, 2017 at 0:36
1
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I want my fastapi routes to include a dependency injection formed from the parameters of a CLI.
In the skeleton code below, a, b and c are the CLI parameters, Consort is the DI and the fastapi clas...
Nichani asked 14/2, 2023 at 15:4
5
After spending a ludicrous amount of time trying to figure out why my dagger injections weren't working; I realised that the "object" type in Kotlin was the problem.
The following did not work, th...
2
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I have a .Net Core project that registers a number of Singletons as follows:
public void ConfigureServices(IServiceCollection services)
{
services.AddMemoryCache();
services.AddLogging();
serv...
Amelina asked 30/7, 2018 at 9:39
1
I was reading this article by Jon Skeet.
In one the samples, he talks about using Lazy<T> to implement singleton pattern.
This is how the code looks:
public sealed class Singleton
{
private ...
Spheroid asked 18/1, 2023 at 4:51
17
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How do I implement the singleton pattern in C#? I want to put my constants and some basic functions in it as I use those everywhere in my project. I want to have them 'Global' and not need to manua...
13
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This is the code I implemented so far to create a single instance WPF application:
#region Using Directives
using System;
using System.Globalization;
using System.Reflection;
using System.Th...
2
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I continue working on my TCP sockets, as mentioned this morning.
I have discovered that the amount of sockets keeps growing, every time I send a message over such a socket. This simply means that I...
8
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From Head First design patterns book, the singleton pattern with double checked locking has been implemented as below:
public class Singleton {
private volatile static Singleton instance;
priva...
Diffractometer asked 21/10, 2011 at 21:53
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This is admittedly a rather loose question. My current understanding of singletons is that they are a class that you set up in such a way that only one instance is ever created.
This sounds a lot ...
Truthvalue asked 31/3, 2010 at 7:23
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What is the simplest/cleanest way to implement the singleton pattern in JavaScript?
Bunkmate asked 25/9, 2009 at 20:5
2
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I am currently digging into DI in Angular 2. I'm implementing a REST-Client using a generic subtypes for concrete Datatypes like this:
class RESTClient<T>{
constructor() {
var inj = Reflec...
Apennines asked 23/8, 2016 at 12:56
2
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I have a Singleton in my Project looking like this:
//Create a Singleton
static MySingleton Instance;
private static readonly object Padlock = new object();
/// <summary>
/// Singelton Metho...
Eliaseliason asked 30/4, 2020 at 10:55
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