private void InnerUnsubscribeTopic(string topic)
{
if (this.topics.ContainsKey(topic))
{
lock (topicsLocker) {
if (this.topics.TryRemove(topic, out bool value))
{
RabbitMQUtils.UnbindQueueFromExchange(this.queueName, topic, this.Channel.Value);
}
}
}
}
private void InnerSubscribeTopic(string topic)
{
if (!this.topics.ContainsKey(topic))
{
lock (topicsLocker) {
if (!this.topics.ContainsKey(topic))
{
RabbitMQUtils.DeclareExchange(topic, this.Channel.Value);
RabbitMQUtils.BindQueueToExchange(this.queueName, topic, this.Channel.Value);
this.topics[topic] = true;
}
}
}
}
private void DeclareQueueAndRegisterConsumer()
{
this.queueName = RabbitMQUtils.DeclareQueue(this.Channel.Value);
var consumer = new EventingBasicConsumer(Channel.Value);
consumer.Received += (object model, BasicDeliverEventArgs eventArgs) => {
try {
var message = Encoding.UTF8.GetString(eventArgs.Body);
RaiseOnMessage(new PubSubMessage(eventArgs.Exchange, message));
} catch (Exception ex) {
EventLogger.WriteError($"Error handling Rabbit consumer event for queue: {this.queueName}. Cache invalidation skipped.");
EventLogger.WriteError(ex);
}
};
RabbitMQUtils.BasicConsume(this.queueName, consumer, this.Channel.Value);
this.consumerTag = consumer.ConsumerTag;
}
public void Dispose()
{
if (this.Channel.IsValueInitialized)
{
Action job = () => {
if (this.consumerTag != null)
{
RabbitMQUtils.BasicCancel(this.consumerTag, this.Channel.Value);
}
if (this.queueName != null)
{
RabbitMQUtils.DeleteQueue(this.queueName, this.Channel.Value);
}
};
executor.AddJob(job);
}
}
public void Publish(string topic, string message)
{
RabbitMQUtils.DeclareExchange(topic, channel.Value);
RabbitMQUtils.Publish(topic, message, this.channel.Value);
}