83 lines
2.6 KiB
C#
83 lines
2.6 KiB
C#
using ConsoleApp2.Const;
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using ConsoleApp2.HostedServices.Abstractions;
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using ConsoleApp2.Options;
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using ConsoleApp2.Services;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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namespace ConsoleApp2.HostedServices;
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/// <summary>
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/// 数据导出服务，将数据导出至MySql服务
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/// </summary>
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public class OutputService : IOutputService
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{
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private readonly ILogger _logger;
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private readonly DataRecordQueue _consumerQueue;
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private readonly IOptions<DatabaseOutputOptions> _options;
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private readonly ProcessContext _context;
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private readonly TaskManager _taskManager;
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public OutputService(ILogger<OutputService> logger,
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[FromKeyedServices(ProcessStep.Consumer)] DataRecordQueue consumerQueue,
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IOptions<DatabaseOutputOptions> options,
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ProcessContext context,
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TaskManager taskManager)
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{
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_logger = logger;
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_consumerQueue = consumerQueue;
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_options = options;
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_context = context;
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_taskManager = taskManager;
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}
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public async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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_logger.LogInformation("***** Mysql output service started *****");
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var records = new List<DataRecord>();
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while (!_context.IsTransformCompleted || _consumerQueue.Count > 0)
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{
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if (!_consumerQueue.TryDequeue(out var record)) continue;
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records.Add(record);
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if (records.Count >= _options.Value.FlushCount)
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{
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var recordsCopy = records;
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_taskManager.CreateTask(async () => await FlushAsync(recordsCopy), stoppingToken);
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records = [];
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}
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if (_taskManager.TaskCount >= _options.Value.MaxTask)
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{
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await _taskManager.WaitAll();
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_taskManager.ClearTask();
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}
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}
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await _taskManager.WaitAll();
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await FlushAsync(records);
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_context.CompleteOutput();
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_logger.LogInformation("***** Mysql output service completed *****");
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}
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private async Task FlushAsync(IEnumerable<DataRecord> records)
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{
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var count = 0;
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await using var output = new MySqlDestination(
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_options.Value.ConnectionString ?? throw new InvalidOperationException("Connection string is required"),
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_logger, true);
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foreach (var record in records)
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{
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await output.WriteRecordAsync(record);
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count++;
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}
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await output.FlushAsync();
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_context.AddOutput(count);
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}
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} |