protected TransformBlock(bool ensureOrdered = false, int maxDegreeOfParallelism = 1)
{
_transformBlock = new System.Threading.Tasks.Dataflow.TransformBlock <TInput, TOutput>(
input => Transform(input),
new ExecutionDataflowBlockOptions
{
EnsureOrdered = ensureOrdered,
MaxDegreeOfParallelism = maxDegreeOfParallelism
}
);
}
/// <summary>
/// Retrieve all data via dataflow(TPL) with all core of processor
/// </summary>
/// <returns></returns>
private async Task retrieveDatabase()
{
var executionOption = new ExecutionDataflowBlockOptions()
{
MaxDegreeOfParallelism = Environment.ProcessorCount, EnsureOrdered = false
};
//Download body database ISP DB
var downloadHTML = new System.Threading.Tasks.Dataflow.TransformBlock <string, string>(s =>
{
using (DownloaderHtml downloader = new DownloaderHtml(Global.URL_ISPDB))
{
return(downloader.Get().Result);
// return Regex.Matches(htmlDocument, "alt=\"\\[TXT\\]\"></td><td><a href=\"(.*)\">(.*)</a>");
}
}, executionOption);
//Find links for parsing from DB
var findLinks = new TransformManyBlock <string, string>(htmlDocument =>
{
var urls = new List <string>();
foreach (Match math in Regex.Matches(htmlDocument, "alt=\"\\[TXT\\]\"></td><td><a href=\"(.*)\">(.*)</a>"))
{
urls.Add(string.Concat(Global.URL_ISPDB, math.Groups[2].Value));
}
configs = new List <clientConfig>();
return(urls);
}, executionOption);
//Parsing configs from DB link by link
var downloadClientConfig = new ActionBlock <string>(url =>
{
using (DownloaderHtml downloader = new DownloaderHtml(url))
{
string response = downloader.Get().Result;
var config = ClientConfigDeserializer.Deserialize(response);
if (config == null)
{
return;
}
configs.Add(config);
}
}, executionOption);
var linkOptions = new DataflowLinkOptions {
PropagateCompletion = true
};
//Link all blocks
downloadHTML.LinkTo(findLinks, linkOptions);
findLinks.LinkTo(downloadClientConfig, linkOptions);
//Post base URL for ISP DB
downloadHTML.Post(_link);
//Wait completion dataflow...
await downloadHTML.Completion;
}