/// <summary>
/// Push item in the queue.
/// </summary>
/// <param name="crawlerQueueEntry">Queue entry.</param>
protected override void PushImpl(CrawlerQueueEntry crawlerQueueEntry)
{
using (var model = new NCrawlerModel())
{
var entry = new CrawlQueue
{
GroupId = this.groupId,
SerializedData = crawlerQueueEntry.ToJson(),
};
model.CrawlQueues.Add(entry);
model.SaveChanges();
}
}
/// <summary>
/// Push item in the queue.
/// </summary>
/// <param name="crawlerQueueEntry">Queue entry.</param>
protected override void PushImpl(CrawlerQueueEntry crawlerQueueEntry)
{
using (var model = new NCrawlerModel())
{
var entry = new CrawlQueue
{
GroupId = this.groupId,
SerializedData = crawlerQueueEntry.ToJson(),
};
model.CrawlQueues.Add(entry);
model.SaveChanges();
}
}
/// <summary>
/// Pop item from the queue.
/// </summary>
/// <returns>Last item in the queue if present; null otherwise.</returns>
protected override CrawlerQueueEntry PopImpl()
{
using (var model = new NCrawlerModel())
{
CrawlQueue result = model.CrawlQueues.FirstOrDefault(q => q.GroupId == this.groupId);
if (result.IsNull())
{
return(null);
}
model.CrawlQueues.Remove(result);
model.SaveChanges();
return(result.SerializedData.FromJson <CrawlerQueueEntry>());
}
}