public void Run(ProcessConfiguration cfg)
{
if (cfg == null)
{
cfg = ProcessConfiguration.FromAppConfig();
}
_metrics = new ProcessMetrics();
_metrics.NotifyProcessStarted();
_log.Info("Process started.");
var articleOrders = new List<ArticleInfo>();
var commentsOrders = new List<ArticleInfo>();
var scrape = new CommonScraper();
using (var session = NHibernateHelper.OpenSession())
{
foreach (var section in cfg.Sections)
{
_log.DebugFormat("Scraping section {0} in portal {1}...", section.Description, section.Portal);
var scrapedInfos = scrape.ArticleInfos(section, TimeSpan.FromHours(cfg.PeriodInHours)).Distinct().ToList();
_log.DebugFormat("{0} articles found.", scrapedInfos.Count);
foreach (var scrapedInfo in scrapedInfos)
{
var currentInfo = session.Get<ArticleInfo>(scrapedInfo.Id);
if (currentInfo != null)
{
if (!currentInfo.HasArticleInDb)
{
articleOrders.Add(scrapedInfo);
}
scrapedInfo.CommentCountInDb = currentInfo.CommentCountInDb;
if (scrapedInfo.CommentCount - currentInfo.CommentCountInDb >=
cfg.CommentsUpdateThreshold)
{
commentsOrders.Add(scrapedInfo);
}
session.Merge(scrapedInfo);
}
else
{
articleOrders.Add(scrapedInfo);
if (scrapedInfo.CommentCount >= cfg.ArticleFetchThreshold)
{
commentsOrders.Add(scrapedInfo);
}
session.Save(scrapedInfo);
}
}
session.Flush();
}
articleOrders = articleOrders.Distinct().ToList();
commentsOrders = commentsOrders.Distinct().ToList();
_metrics.ArticleOrders = articleOrders.Count;
_metrics.CommentsOrders = commentsOrders.Count;
_log.InfoFormat("{0} article orders issued.", articleOrders.Count);
_log.InfoFormat("{0} comments orders issued.", commentsOrders.Count);
foreach (var articleOrder in articleOrders)
{
_log.DebugFormat("Scraping article '{0}' in portal {1}...", articleOrder.Title, articleOrder.Id.Portal);
var article = scrape.Article(articleOrder);
if (article == null) continue;
session.SaveOrUpdate(article);
_metrics.ArticlesScraped++;
}
session.Flush();
var commentsCounter = 0;
foreach (var commentsOrder in commentsOrders)
{
_log.DebugFormat("Scraping comments for article '{0}' in portal {1}...", commentsOrder.Title, commentsOrder.Id.Portal);
var comments = scrape.Comments(commentsOrder, commentsOrder.CommentCountInDb, commentsOrder.CommentCount).Distinct().ToList();
comments.ForEach(session.SaveOrUpdate);
session.Flush();
commentsCounter += comments.Count;
_log.DebugFormat("Total comments scraped: {0}", commentsCounter);
_metrics.CommentsScraped += comments.Count;
}
_log.Info("Process finished.");
_metrics.NotifyProcessFinished();
session.Save(_metrics);
session.Flush();
}
}