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stateful API in C#

eliud onyango answered on December 11, 2022 Popularity 1/10 Helpfulness 1/10

answer stateful API in C#

stateful API in C#

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public class UserController : ControllerBase
{
    // Inject the database context and the distributed cache
    // into the constructor
    private readonly UserContext _context;
    private readonly IDistributedCache _cache;
    public UserController(UserContext context, IDistributedCache cache)
    {
        _context = context;
        _cache = cache;
    }

    // Endpoint to retrieve a user by ID
    [HttpGet("{id}")]
    public async Task<ActionResult<User>> GetUserById(int id)
    {
        // Check if the user is already in the cache
        var cachedUser = await _cache.GetAsync($"user:{id}");
        if (cachedUser != null)
        {
            // If the user is in the cache, return it
            return JsonConvert.DeserializeObject<User>(cachedUser);
        }
        else
        {
            // If the user is not in the cache, retrieve it from the database
            var user = await _context.Users.FindAsync(id);

            // If the user exists, add it to the cache
            if (user != null)
            {
                await _cache.SetAsync($"user:{id}", JsonConvert.SerializeObject(user));
            }

            // Return the user
            return user;
        }
    }

    // Endpoint to update a user's information
    [HttpPut("{id}")]
    public async Task<IActionResult> UpdateUser(int id, [FromBody] User user)
    {
        // Update the user in the database
        _context.Entry(user).State = EntityState.Modified;
        await _context.SaveChangesAsync();

        // Update the user in the cache
        await _cache.SetAsync($"user:{id}", JsonConvert.SerializeObject(user));

        return NoContent();
    }
}

Popularity 1/10 Helpfulness 1/10 Language csharp

Source: Grepper

Tags: api c# stateful

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Contributed on Dec 11 2022

eliud onyango

0 Answers Avg Quality 2/10

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