private void Add(NetworkTask task)
{
lock (_lock)
{
if (_state == STATE.STARTED)
{
_networkTasks.Enqueue(task);
}
}
}
// Producer Task
// 主要任務是到資料庫查看有哪些公告訊息未發佈的，如果有未發佈的公告訊息，
// 從資料庫找出那些公告訊息應發佈到哪些裝置，並排程網路任務 (NetworkTask)。
private void PublishAnnouncementsTask(CancellationToken cancelToken)
{
try
{
int lastestPublishedAnnouncementID = 0;
while (true)
{
_token.ThrowIfCancellationRequested();
using (var db = new ICMDBContext())
{
try
{
var latestGeneratedAnnouncementID = db.Announcements.Select(a => a.id).DefaultIfEmpty(0).Max();
if (latestGeneratedAnnouncementID != lastestPublishedAnnouncementID)
{
var devices = (from device in db.Devices
from ar in db.AnnouncementRooms
where device.roomid.StartsWith(ar.RoomID) &&
ar.AnnouncementID > lastestPublishedAnnouncementID
select device).Distinct();
foreach (var device in devices)
{
if (device.type == (int)DeviceType.Indoor_Phone ||
device.type == (int)DeviceType.Indoor_Phone_SD)
{
NetworkTask task = new NetworkTask
{
IP = device.ip,
TaskFunc = async() =>
{
int newAnnouncementCount = await Task.Run(() =>
{
int count = 0;
try
{
using (var _db = new ICMDBContext())
{
count = (from ar in _db.AnnouncementRooms
where ar.RoomID == device.roomid.Substring(0, 14) &&
ar.HasRead == false
select ar).Count();
}
}
catch (Exception) { }
return(count);
}).ConfigureAwait(false);
await HttpClient.SendNewTextMsgCountAsync(device.ip, newAnnouncementCount).ConfigureAwait(false);
}
};
this.Add(task);
//DebugLog.TraceMessage(string.Format("IP: {0}", device.ip));
}
}
lastestPublishedAnnouncementID = latestGeneratedAnnouncementID;
}
}
catch (Exception) { }
}
Thread.Sleep(100);
}
}
catch (OperationCanceledException) { }
}