cloutier--bird.makeup/src/BirdsiteLive.Pipeline/Processors/RetrieveTwitterUsersProcessor.cs

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using System;
using System.Threading;
using System.Threading.Tasks;
using System.Threading.Tasks.Dataflow;
using BirdsiteLive.DAL.Contracts;
using BirdsiteLive.DAL.Models;
using BirdsiteLive.Pipeline.Contracts;
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using Microsoft.Extensions.Logging;
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namespace BirdsiteLive.Pipeline.Processors
{
public class RetrieveTwitterUsersProcessor : IRetrieveTwitterUsersProcessor
{
private readonly ITwitterUserDal _twitterUserDal;
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private readonly ILogger<RetrieveTwitterUsersProcessor> _logger;
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private const int SyncPeriod = 15; //in minutes
#region Ctor
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public RetrieveTwitterUsersProcessor(ITwitterUserDal twitterUserDal, ILogger<RetrieveTwitterUsersProcessor> logger)
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{
_twitterUserDal = twitterUserDal;
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_logger = logger;
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}
#endregion
public async Task GetTwitterUsersAsync(BufferBlock<SyncTwitterUser[]> twitterUsersBufferBlock, CancellationToken ct)
{
for (;;)
{
ct.ThrowIfCancellationRequested();
try
{
var users = await _twitterUserDal.GetAllTwitterUsersAsync();
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if(users.Length > 0)
await twitterUsersBufferBlock.SendAsync(users, ct);
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}
catch (Exception e)
{
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_logger.LogError(e, "Failing retrieving Twitter Users.");
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}
await Task.Delay(SyncPeriod * 1000 * 60, ct);
}
}
}
}