/// <summary>
/// 线程池抓取任务
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static void ExeTask(object obj)
{
CrawlTask sCrawlTask = obj as CrawlTask;
CrawlResult sCrawlResult = new CrawlResult(sCrawlTask.ID, sCrawlTask.PlotKey, sCrawlTask.LineID);
sCrawlTask.List.ForEach(t =>
{
try
{
item.URL = t.Url;
item.Method = "get";
result = httpHelper.GetHtml(item);
sCrawlResult.List.Add(new CrawlResultDetail
{
Result = true,
ID = t.ID,
Ext = "html",
Content = result.Html,
Info = null
});
if (DelayMin >= DelayMax)
{
DelayMax = DelayMin + 5000;
}
Thread.Sleep(new Random().Next(DelayMin, DelayMax));
}
catch (Exception ee)
{
sCrawlResult.List.Add(new CrawlResultDetail
{
Result = false,
ID = t.ID,
Ext = "Error",
Content = null,
Info = ee.Message
});
}
});
lock (mLocker)
{
mTaskPool.Remove(sCrawlTask.ID);
//界面设计
HostStatus sHostStatus;
if (mHostDic.TryGetValue(sCrawlTask.Host, out sHostStatus))
{
//sHostStatus.Total += sCrawlResult.List.Count;
sHostStatus.TaskCount--;
}
}
//发送任务回数据中心
WCFServer.SendingCrawlResult(sCrawlResult, sCrawlTask.Authority);
}
/// <summary>
/// 爬虫去干活去喽
/// </summary>
/// <returns></returns>
public static LwbResult DbAdapter()
{
if (!mCanAttemper)
{
return(new LwbResult(LwbResultType.Success, "爬虫正在获取任务中，请勿累死爬虫"));
}
try
{
//锁定爬虫，让其暂时不接受任务
mCanAttemper = false;
int sMax;
lock (mLocker)
{
sMax = (MaxThreads - mTaskPool.Count) > 5 ? 5 : (MaxThreads - mTaskPool.Count);
}
//爬虫已经在干任务达到30个
if (sMax == 0)
{
return(new LwbResult(LwbResultType.Success, "爬虫已经正在干将近" + MaxThreads + "个任务，让他歇会吧"));
}
List <string> sList = new List <string>();
lock (mLocker)
{
foreach (KeyValuePair <string, HostStatus> sKp in mHostDic)
{
if (sKp.Value.Busy)
{
sList.Add(sKp.Key);
}
}
}
//去远程服务器取任务
LwbResult sLwbResult = WCFServer.GetCrawlTask(new Input获取生产线任务列表 {
RuningTaskHost = sList, TaskMax = sMax
});
List <CrawlTask> sCrawlTaskList = sLwbResult.Data as List <CrawlTask>;
if (sCrawlTaskList == null)
{
return(sLwbResult);
}
sCrawlTaskList.ForEach(t =>
{
lock (mLocker)
{
//任务包缓冲池
mTaskPool[t.ID] = t;
HostStatus sHostStatus;
if (mHostDic.TryGetValue(t.Host, out sHostStatus) == false)
{
sHostStatus = new HostStatus(t.Host);
mHostDic[t.Host] = sHostStatus;
}
sHostStatus.TaskCount++;
}
ThreadPool.QueueUserWorkItem(new WaitCallback(ExeTask), t);
});
mLastAddTaskDt = DateTime.Now;
return(new LwbResult(LwbResultType.Success, "爬虫获取任务完毕，很开心"));
}
catch (Exception ee)
{
return(new LwbResult(LwbResultType.Error, "爬虫在获取任务中生病了" + ee.Message));
}
finally
{
mCanAttemper = true;
}
}
