/// <summary> 订阅属性 </summary>
/// <param name="queue">队列名称</param>
/// <param name="routeKey">路由键,默认为事件属性的RouteKey</param>
/// <param name="fetchCount">每次处理数量,小于等于0不限制，默认1</param>
/// <param name="retry">是否开启重试</param>
/// <param name="times">秒</param>
public SubscriptionAttribute(string queue, string routeKey = null, int fetchCount = 1, bool retry = true,
int[] times = null)
{
Option = new RabbitMqSubscribeOption(queue, routeKey)
{
PrefetchCount = fetchCount,
EnableRetry = retry
};
if (times != null && times.Any())
{
Option.Times = times.Select(t => TimeSpan.FromSeconds(t)).ToArray();
}
Queue = queue;
RouteKey = routeKey;
}
/// <summary> 申明队列并设置死信队列 </summary>
/// <param name="channel"></param>
/// <param name="queue"></param>
/// <param name="exchange"></param>
/// <param name="routeKey"></param>
/// <param name="option"></param>
public static void DeclareWithDlx(this IModel channel, string queue, string exchange, string routeKey, RabbitMqSubscribeOption option)
{
var xRouteKey = string.IsNullOrWhiteSpace(option.XDeadRouteKey) ? $"~dlx_{queue}" : option.XDeadRouteKey;
var xExchange = string.IsNullOrWhiteSpace(option.XDeadExchange) ? exchange : option.XDeadExchange;
var args = new Dictionary <string, object>
{
{ "x-dead-letter-exchange", xExchange },
{ "x-dead-letter-routing-key", xRouteKey }
};
//死信队列
//1.消息被拒绝，并且设置ReQueue参数false；
//2.消息过期；
//3.队列打到最大长度；
channel.QueueDeclare(xRouteKey, true, false);
channel.QueueBind(xRouteKey, xExchange, xRouteKey, null);
//声明队列
channel.QueueDeclare(queue, true, false, false, args);
channel.QueueBind(queue, xExchange, routeKey);
}
