public Task <MessageExchange> Process(IMessageExchangeFilter filter, MessageExchange exchange, MessageExchangeFilterInvoker invoker)
{
if (!exchange.IsIncompleteRequest)
{
return(filter.Process(exchange, invoker));
}
var messageLabel = exchange.Out.Label.Name;
CacheConfiguration config;
if (!this.cacheConfiguration.TryGetValue(messageLabel, out config))
{
this.CollectMetrics(messageLabel, false);
return(filter.Process(exchange, invoker));
}
if (!(config.Enabled ?? false))
{
this.CollectMetrics(messageLabel, false);
return(filter.Process(exchange, invoker));
}
var cachedValue = config.Cache[exchange.Out];
var cached = cachedValue != null;
this.CollectMetrics(messageLabel, cached);
if (cached)
{
exchange.In = new Message(MessageLabel.Empty, cachedValue);
return(Filter.Result(exchange));
}
return(filter.Process(exchange, invoker)
.ContinueWith(t => TryCacheResponse(t.Result, config)));
}
/// <summary>
/// The register filter.
/// </summary>
/// <param name="filter">
/// The filter.
/// </param>
public void RegisterFilter(IMessageExchangeFilter filter)
{
this.filters.Add(filter);
}