/// <summary>
/// 发布消息到内置死信队列
/// </summary>
/// <param name="queue">队列名称</param>
/// <param name="exchange">交换机名称</param>
/// <param name="routingKey">路由键</param>
/// <param name="body">消息内容</param>
/// <param name="retryCount">重试次数</param>
/// <param name="exception">异常</param>
/// <returns></returns>
private bool PublishToDead(
string queue,
string exchange,
string routingKey,
string body,
int retryCount,
Exception exception)
{
//内置死信队列、交换机、路由键
var deadLetterQueue = $"{queue.ToLower()}.{(exception != null ? "error" : "fail")}";
var deadLetterExchange = DefaultDeadLetterExchange;
var deadLetterRoutingKey = $"{queue.ToLower()}.deadletter";
//内置死信队列内容
var deadLetterBody = new DeadLetterQueue
{
Body = body,
CreateDateTime = DateTime.Now,
Exception = exception,
ExceptionMsg = exception?.Message,
Queue = queue,
RoutingKey = routingKey,
Exchange = exchange,
RetryCount = retryCount
};
//发送内置死信消息，注意此处与原生的死信消息无关
return(Publish(deadLetterExchange, deadLetterQueue, deadLetterRoutingKey, deadLetterBody.ToJson()));
}
/// <summary>
/// 发布消息到死信队列
/// </summary>
/// <param name="queue">队列名称</param>
/// <param name="exchange">交换机名称</param>
/// <param name="routingKey">路由键</param>
/// <param name="body">消息内容</param>
/// <param name="retryCount">重试次数</param>
/// <param name="exception">异常</param>
/// <returns></returns>
private bool PublishToDead <T>(
string queue,
string exchange,
string routingKey,
string body,
int retryCount,
Exception exception)
{
//死信队列、交换机、路由键
var deadLetterQueue = $"{queue.ToLower()}.{(exception != null ? "error" : "fail")}";
var deadLetterExchange = DefaultDeadLetterExchange;
var deadLetterRoutingKey = $"{queue.ToLower()}.deadletter";
var attribute = typeof(T).GetAttribute <RabbitMqAttribute>();
if (attribute != null)
{
if (!attribute.DeadLetterExchange.IsNullOrEmpty())
{
deadLetterExchange = attribute.DeadLetterExchange;
}
if (!attribute.DeadLetterRoutingKey.IsNullOrEmpty())
{
deadLetterRoutingKey = attribute.DeadLetterRoutingKey;
}
}
//死信队列内容
var deadLetterBody = new DeadLetterQueue
{
Body = body,
CreateDateTime = DateTime.Now,
Exception = exception,
ExceptionMsg = exception?.Message,
Queue = queue,
RoutingKey = routingKey,
Exchange = exchange,
RetryCount = retryCount
};
return(Publish(deadLetterExchange, deadLetterQueue, deadLetterRoutingKey, deadLetterBody.ToJson()));
}