public MessageConsumerBase(ConnectionFactory factory, SettingConfig config)
{
this._config = config ?? throw new ArgumentException(nameof(config));
this._connection = factory.CreateConnection();
this._connection.ConnectionShutdown += (sender, args) => { };
this._connection.ConnectionBlocked += (sender, args) => { };
this._connection.ConnectionUnblocked += (sender, args) => { };
this._channel = this._connection.CreateModel();
this._channel.BasicSetting(this._config);
this._consumer = new EventingBasicConsumer(this._channel);
this._consumer.Received += async(sender, args) =>
{
try
{
//重试策略
var retryPolicy = Policy.Handle <Exception>().WaitAndRetryAsync(
retryCount: (int)this._config.ConsumeRetryCount,
sleepDurationProvider: i => TimeSpan.FromMilliseconds(this._config.ConsumeRetryWaitMilliseconds));
await retryPolicy.ExecuteAsync(async() =>
{
var result = await this.OnMessageReceived(sender, args);
if (result == null || !result.Value)
{
throw new Exception("未能消费对象");
}
//do nothing
await FakeAsync();
});
}
catch (Exception e)
{
//log errors
e.AddErrorLog();
}
finally
{
if (this._config.Ack)
{
//从队列中移除消息
this._channel.X_BasicAck(args);
}
}
};
var consumerTag = $"{Environment.MachineName}|{this._config.QueueName}|{this._config.ConsumerName}";
this._channel.BasicConsume(
queue: this._config.QueueName,
noAck: !this._config.Ack,
consumerTag: consumerTag,
consumer: this._consumer);
}
/// <summary>
/// 基本设置
/// </summary>
public static void BasicSetting(this IModel channel, SettingConfig config)
{
channel.X_ExchangeDeclare(config.ExchangeName, config.ExchangeType, config.Delay);
if (!ValidateHelper.IsPlumpString(config.QueueName))
{
throw new ArgumentException(nameof(config.QueueName));
}
channel.X_QueueBind(config.QueueName, config.ExchangeName, config.RouteKey, config.Args);
//每个消费一次收到多少消息，其余的放在队列里
channel.BasicQos(0, 1, false);
}