protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
await _statisticsStore.EnsureDatabaseAndTableCreatedAsync();
_logger.LogInformation("统计中心准备数据库完成");
_eventBus.Subscribe(_options.TopicStatisticsService,
async message => await HandleStatisticsMessageAsync(message));
_logger.LogInformation("统计中心启动");
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
await _statisticsStore.EnsureDatabaseAndTableCreatedAsync();
_logger.LogInformation("Initialize statistics center database success");
_mq.Subscribe <string>(_options.TopicStatisticsService,
async message => await HandleStatisticsMessageAsync(message));
_logger.LogInformation("Statistics center started");
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Statistics service starting");
await _statisticsStore.EnsureDatabaseAndTableCreatedAsync();
_consumer = new MessageQueue.AsyncMessageConsumer <byte[]>(TopicNames.Statistics);
_consumer.Received += async bytes =>
{
var message = await bytes.DeserializeAsync(stoppingToken);
if (message == null)
{
_logger.LogWarning("Received empty message");
return;
}
if (message is Success success)
{
await _statisticsStore.IncreaseSuccessAsync(success.SpiderId);
}
else if (message is Start start)
{
await _statisticsStore.StartAsync(start.SpiderId, start.SpiderName);
}
else if (message is Failure failure)
{
await _statisticsStore.IncreaseFailureAsync(failure.SpiderId);
}
else if (message is Total total)
{
await _statisticsStore.IncreaseTotalAsync(total.SpiderId, total.Count);
}
else if (message is Exit exit)
{
await _statisticsStore.ExitAsync(exit.SpiderId);
}
else if (message is AgentSuccess agentSuccess)
{
await _statisticsStore.IncreaseAgentSuccessAsync(agentSuccess.AgentId, agentSuccess.ElapsedMilliseconds);
}
else if (message is AgentFailure agentFailure)
{
await _statisticsStore.IncreaseAgentFailureAsync(agentFailure.AgentId, agentFailure.ElapsedMilliseconds);
}
else if (message is Print print)
{
var statistics = await _statisticsStore.GetSpiderStatisticsAsync(print.SpiderId);
if (statistics != null)
{
var left = statistics.Total >= statistics.Success
? (statistics.Total - statistics.Success - statistics.Failure).ToString()
: "unknown";
_logger.LogInformation(
$"{print.SpiderId} total {statistics.Total}, success {statistics.Success}, failure {statistics.Failure}, left {left}");
}
}
else
{
var log = Encoding.UTF8.GetString(JsonSerializer.SerializeToUtf8Bytes(message));
_logger.LogWarning($"Not supported message: {log}");
}
};
await _messageQueue.ConsumeAsync(_consumer, stoppingToken);
_logger.LogInformation("Statistics service started");
}
/// <summary>
/// 启动统计服务中心
/// </summary>
/// <param name="cancellationToken"></param>
/// <returns></returns>
/// <exception cref="SpiderException"></exception>
public async Task StartAsync(CancellationToken cancellationToken)
{
if (_isRunning)
{
throw new SpiderException("统计中心正在运行中");
}
await _statisticsStore.EnsureDatabaseAndTableCreatedAsync();
_logger.LogInformation("统计中心准备数据库完成");
_mq.Subscribe(Framework.StatisticsServiceTopic, async message =>
{
var commandMessage = message.ToCommandMessage();
if (commandMessage == null)
{
_logger.LogWarning($"接收到非法消息: {message}");
return;
}
switch (commandMessage.Command)
{
case "Success":
{
var ownerId = commandMessage.Message;
await _statisticsStore.IncrementSuccessAsync(ownerId);
break;
}
case "Failed":
{
var data = commandMessage.Message.Split(',');
await _statisticsStore.IncrementFailedAsync(data[0], int.Parse(data[1]));
break;
}
case "Start":
{
var ownerId = commandMessage.Message;
await _statisticsStore.StartAsync(ownerId);
break;
}
case "Exit":
{
var ownerId = commandMessage.Message;
await _statisticsStore.ExitAsync(ownerId);
break;
}
case "Total":
{
var data = commandMessage.Message.Split(',');
await _statisticsStore.IncrementTotalAsync(data[0], int.Parse(data[1]));
break;
}
case "DownloadSuccess":
{
var data = commandMessage.Message.Split(',');
await _statisticsStore.IncrementDownloadSuccessAsync(data[0], int.Parse(data[1]),
long.Parse(data[2]));
break;
}
case "DownloadFailed":
{
var data = commandMessage.Message.Split(',');
await _statisticsStore.IncrementDownloadFailedAsync(data[0], int.Parse(data[1]),
long.Parse(data[2]));
break;
}
case "Print":
{
var ownerId = commandMessage.Message;
var statistics = await _statisticsStore.GetSpiderStatisticsAsync(ownerId);
_logger.LogInformation(
$"任务 {ownerId} 总计 {statistics.Total}, 成功 {statistics.Success}, 失败 {statistics.Failed}, 剩余 {statistics.Total - statistics.Success - statistics.Failed}");
break;
}
}
});
_logger.LogInformation("统计中心启动");
}