Add idempotency code
This commit is contained in:
Alex Hyett
parent
8b2e04a8e3
commit
0b1e85ecb7
12 changed files with 775 additions and 2 deletions
477
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82
Controllers/PaymentController.cs
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82
Controllers/PaymentController.cs
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@ -0,0 +1,82 @@
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using System;
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using Microsoft.AspNetCore.Mvc;
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using IdempotentAPI.Filters;
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using Idempotency.DTOs;
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using Microsoft.Extensions.Caching.Distributed;
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using System.Text;
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using Newtonsoft.Json;
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namespace Idempotency.Controllers
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{
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[ApiController]
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[Route("[controller]")]
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[Consumes("application/json")]
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[Produces("application/json")]
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[Idempotent]
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public class PaymentController : ControllerBase
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{
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private readonly IDistributedCache _db;
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public PaymentController(IDistributedCache db)
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{
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_db = db ?? throw new ArgumentNullException(nameof(db));
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}
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[HttpGet("{id}")]
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public IActionResult Get(string id)
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{
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if (string.IsNullOrWhiteSpace(id))
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return BadRequest($"The id should not be null");
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var response = GetPayment(id);
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return Ok(response);
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}
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[HttpPost]
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public IActionResult Post([FromBody] PaymentRequest request)
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{
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if (request is null)
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return BadRequest($"The request should not be null");
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if (request.CardNumber.Length != 16)
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return BadRequest("The card number should be 16 characters");
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var id = Guid.NewGuid().ToString();
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var response = new PaymentResponse
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{
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Id = id.ToString(),
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Amount = request.Amount,
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Currency = request.Currency,
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CardNumber = request.CardNumber.Substring(12, 4).PadLeft(16, '*'),
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Created = DateTime.UtcNow
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};
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SavePayment(id, response);
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return Ok(response);
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}
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private void SavePayment(string id, PaymentResponse payment)
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{
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var options = new DistributedCacheEntryOptions();
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// I am using the cache as a makeshift database here.
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// Obviously in a real system you would be saving this to an actual database.
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var data = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(payment));
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_db.Set(id, data, options);
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}
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private PaymentResponse GetPayment(string id)
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{
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var data = _db.Get(id);
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if (data is null)
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return null;
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return JsonConvert.DeserializeObject<PaymentResponse>(Encoding.UTF8.GetString(data));
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}
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}
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}
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15
DTOs/PaymentRequest.cs
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15
DTOs/PaymentRequest.cs
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using System;
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namespace Idempotency.DTOs;
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[Serializable]
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public class PaymentRequest
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{
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public long Amount { get; set; }
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public string Currency { get; set; }
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public string CardNumber { get; set; }
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public string CVV { get; set; }
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public string ExpiryYear { get; set; }
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public string ExpiryMonth { get; set; }
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}
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13
DTOs/PaymentResponse.cs
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13
DTOs/PaymentResponse.cs
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@ -0,0 +1,13 @@
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using System;
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namespace Idempotency.DTOs;
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[Serializable]
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public class PaymentResponse
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{
|
||||
public string Id { get; set; }
|
||||
public long Amount { get; set; }
|
||||
public string Currency { get; set; }
|
||||
public string CardNumber { get; set; }
|
||||
public DateTime Created { get; set; }
|
||||
}
|
||||
13
Idempotency.csproj
Normal file
13
Idempotency.csproj
Normal file
|
|
@ -0,0 +1,13 @@
|
|||
<Project Sdk="Microsoft.NET.Sdk.Web">
|
||||
|
||||
<PropertyGroup>
|
||||
<TargetFramework>net7.0</TargetFramework>
|
||||
</PropertyGroup>
|
||||
|
||||
<ItemGroup>
|
||||
<PackageReference Include="IdempotentAPI" Version="02.1.0" />
|
||||
<PackageReference Include="IdempotentAPI.Cache.DistributedCache" Version="2.1.0" />
|
||||
<PackageReference Include="Microsoft.Extensions.Caching.Redis" Version="2.2.0" />
|
||||
</ItemGroup>
|
||||
|
||||
</Project>
|
||||
22
Idempotency.sln
Normal file
22
Idempotency.sln
Normal file
|
|
@ -0,0 +1,22 @@
|
|||
|
||||
Microsoft Visual Studio Solution File, Format Version 12.00
|
||||
# Visual Studio Version 17
|
||||
VisualStudioVersion = 17.0.31903.59
|
||||
MinimumVisualStudioVersion = 10.0.40219.1
|
||||
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Idempotency", "Idempotency.csproj", "{25C5726C-1FD2-41D0-9229-12DAD1BE03A3}"
|
||||
EndProject
|
||||
Global
|
||||
GlobalSection(SolutionConfigurationPlatforms) = preSolution
|
||||
Debug|Any CPU = Debug|Any CPU
|
||||
Release|Any CPU = Release|Any CPU
|
||||
EndGlobalSection
|
||||
GlobalSection(SolutionProperties) = preSolution
|
||||
HideSolutionNode = FALSE
|
||||
EndGlobalSection
|
||||
GlobalSection(ProjectConfigurationPlatforms) = postSolution
|
||||
{25C5726C-1FD2-41D0-9229-12DAD1BE03A3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
|
||||
{25C5726C-1FD2-41D0-9229-12DAD1BE03A3}.Debug|Any CPU.Build.0 = Debug|Any CPU
|
||||
{25C5726C-1FD2-41D0-9229-12DAD1BE03A3}.Release|Any CPU.ActiveCfg = Release|Any CPU
|
||||
{25C5726C-1FD2-41D0-9229-12DAD1BE03A3}.Release|Any CPU.Build.0 = Release|Any CPU
|
||||
EndGlobalSection
|
||||
EndGlobal
|
||||
26
Program.cs
Normal file
26
Program.cs
Normal file
|
|
@ -0,0 +1,26 @@
|
|||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Linq;
|
||||
using System.Threading.Tasks;
|
||||
using Microsoft.AspNetCore.Hosting;
|
||||
using Microsoft.Extensions.Configuration;
|
||||
using Microsoft.Extensions.Hosting;
|
||||
using Microsoft.Extensions.Logging;
|
||||
|
||||
namespace Idempotency
|
||||
{
|
||||
public class Program
|
||||
{
|
||||
public static void Main(string[] args)
|
||||
{
|
||||
CreateHostBuilder(args).Build().Run();
|
||||
}
|
||||
|
||||
public static IHostBuilder CreateHostBuilder(string[] args) =>
|
||||
Host.CreateDefaultBuilder(args)
|
||||
.ConfigureWebHostDefaults(webBuilder =>
|
||||
{
|
||||
webBuilder.UseStartup<Startup>();
|
||||
});
|
||||
}
|
||||
}
|
||||
47
README.md
47
README.md
|
|
@ -1,2 +1,45 @@
|
|||
# idempotency
|
||||
An example API showing Idempotency using Redis
|
||||
# Idempotency - What is it and How to Implement It
|
||||
An example API showing Idempotency using Redis.
|
||||
|
||||
This is the code that is shown in my video "Idempotency - What is it and How to Implement It".
|
||||
|
||||
To run this project you need to do the following:
|
||||
|
||||
1. Run `docker-compose up` to start the Redis container.
|
||||
2. Run `dotnet run` to start the API.
|
||||
|
||||
You can then send requests like the following:
|
||||
|
||||
```sh
|
||||
curl --location 'http://localhost:5000/payment/' \
|
||||
--header 'IdempotencyKey: A222EB7F-E861-420F-B010-0EDDD29C935E' \
|
||||
--header 'Content-Type: application/json' \
|
||||
--data '{
|
||||
"amount": 1200,
|
||||
"currency": "USD",
|
||||
"cardNumber": "4122916040150031",
|
||||
"cvv": "123",
|
||||
"expiryYear": "2023",
|
||||
"expiryMonth": "01"
|
||||
}'
|
||||
```
|
||||
|
||||
If you send this request through multiple times you will get the same response.
|
||||
|
||||
Such as:
|
||||
|
||||
```json
|
||||
{
|
||||
"id": "e5c68b39-b534-47c1-a672-a6f8c1fd18f6",
|
||||
"amount": 1200,
|
||||
"currency": "USD",
|
||||
"cardNumber": "************0031",
|
||||
"created": "2023-09-20T11:08:34.028706Z"
|
||||
}
|
||||
```
|
||||
|
||||
You can also retrieve payments using GET and the ID:
|
||||
```sh
|
||||
curl --location 'http://localhost:5000/payment/e5c68b39-b534-47c1-a672-a6f8c1fd18f6'
|
||||
```
|
||||
|
||||
|
|
|
|||
50
Startup.cs
Normal file
50
Startup.cs
Normal file
|
|
@ -0,0 +1,50 @@
|
|||
using IdempotentAPI.Cache.DistributedCache.Extensions.DependencyInjection;
|
||||
using IdempotentAPI.Extensions.DependencyInjection;
|
||||
using Microsoft.AspNetCore.Builder;
|
||||
using Microsoft.AspNetCore.Hosting;
|
||||
using Microsoft.Extensions.Configuration;
|
||||
using Microsoft.Extensions.DependencyInjection;
|
||||
using Microsoft.Extensions.Hosting;
|
||||
|
||||
namespace Idempotency
|
||||
{
|
||||
public class Startup
|
||||
{
|
||||
public Startup(IConfiguration configuration)
|
||||
{
|
||||
Configuration = configuration;
|
||||
}
|
||||
|
||||
public IConfiguration Configuration { get; }
|
||||
|
||||
public void ConfigureServices(IServiceCollection services)
|
||||
{
|
||||
services.AddDistributedRedisCache(options =>
|
||||
{
|
||||
options.Configuration = "localhost:6379";
|
||||
options.InstanceName = "Redis";
|
||||
});
|
||||
|
||||
services.AddIdempotentAPI();
|
||||
services.AddIdempotentAPIUsingDistributedCache();
|
||||
services.AddControllers();
|
||||
}
|
||||
|
||||
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
|
||||
{
|
||||
if (env.IsDevelopment())
|
||||
{
|
||||
app.UseDeveloperExceptionPage();
|
||||
}
|
||||
|
||||
app.UseHttpsRedirection();
|
||||
app.UseRouting();
|
||||
app.UseAuthorization();
|
||||
|
||||
app.UseEndpoints(endpoints =>
|
||||
{
|
||||
endpoints.MapControllers();
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
9
appsettings.Development.json
Normal file
9
appsettings.Development.json
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
{
|
||||
"Logging": {
|
||||
"LogLevel": {
|
||||
"Default": "Information",
|
||||
"Microsoft": "Warning",
|
||||
"Microsoft.Hosting.Lifetime": "Information"
|
||||
}
|
||||
}
|
||||
}
|
||||
10
appsettings.json
Normal file
10
appsettings.json
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
{
|
||||
"Logging": {
|
||||
"LogLevel": {
|
||||
"Default": "Information",
|
||||
"Microsoft": "Warning",
|
||||
"Microsoft.Hosting.Lifetime": "Information"
|
||||
}
|
||||
},
|
||||
"AllowedHosts": "*"
|
||||
}
|
||||
13
docker-compose.yml
Normal file
13
docker-compose.yml
Normal file
|
|
@ -0,0 +1,13 @@
|
|||
version: '3.8'
|
||||
services:
|
||||
cache:
|
||||
image: redis:latest
|
||||
restart: always
|
||||
ports:
|
||||
- '6379:6379'
|
||||
command: redis-server --save 20 1 --loglevel warning
|
||||
volumes:
|
||||
- cache:/data
|
||||
volumes:
|
||||
cache:
|
||||
driver: local
|
||||
Loading…
Reference in a new issue