private async Task GetOrAddOneCooperateItem(CancellationToken cancellationToken, string oneId)
{
using (var cooperateContext = new CooperateContext(_options))
{
try
{
var findRes = await cooperateContext.CooperateEntities.FindAsync(oneId);
if (findRes != null)
{
var item = _cooperateItems[oneId];
item.ExpireKeyValuePair = new KeyValuePair <bool, DateTime>(false, findRes.ExpireDateTime);
_cooperateEntities[oneId] = findRes;
}
else
{
var now = DateTime.UtcNow;
var entity = new CooperateEntity
{
Id = oneId,
LastModifyDateTime = now,
ExpireDateTime = now + _cooperateRequest.AliveTimeSpan
};
var res = await cooperateContext.CooperateEntities.AddAsync(entity, cancellationToken);
await cooperateContext.SaveChangesAsync(cancellationToken);
_cooperateEntities[oneId] = entity;
var item = _cooperateItems[oneId];
item.ExpireKeyValuePair = new KeyValuePair <bool, DateTime>(true, entity.ExpireDateTime);
}
}
catch (DbUpdateException)
{
var findRes = await cooperateContext.CooperateEntities.FindAsync(oneId);
if (findRes != null)
{
var item = _cooperateItems[oneId];
item.ExpireKeyValuePair = new KeyValuePair <bool, DateTime>(false, findRes.ExpireDateTime);
_cooperateEntities[oneId] = findRes;
}
else
{
throw;
}
}
}
}
private async Task UpdateCooperateEntity(CancellationToken cancellationToken, string oneId, DateTime now)
{
using (var cooperateContext = new CooperateContext(_options))
{
try
{
var entity = _cooperateEntities[oneId];
var backEntity = new CooperateEntity
{
Id = entity.Id,
LastModifyDateTime = entity.LastModifyDateTime,
ExpireDateTime = entity.ExpireDateTime
};
var nowEntity = await cooperateContext.CooperateEntities.FindAsync(oneId);
if (nowEntity.LastModifyDateTime > backEntity.LastModifyDateTime)
{
_cooperateEntities[oneId] = nowEntity;
var item = _cooperateItems[oneId];
item.ExpireKeyValuePair = new KeyValuePair <bool, DateTime>(false, nowEntity.ExpireDateTime);
return;
}
else
{
nowEntity.LastModifyDateTime = now;
nowEntity.ExpireDateTime = now + _cooperateRequest.AliveTimeSpan;
cooperateContext.Update(nowEntity);
await cooperateContext.SaveChangesAsync(cancellationToken);
_cooperateEntities[oneId] = nowEntity;
var item = _cooperateItems[oneId];
item.ExpireKeyValuePair = new KeyValuePair <bool, DateTime>(true, nowEntity.ExpireDateTime);
}
}
catch (DbUpdateConcurrencyException)
{
var entity = await cooperateContext.CooperateEntities.FindAsync(oneId);
_cooperateEntities[oneId] = entity;
var item = _cooperateItems[oneId];
item.ExpireKeyValuePair = new KeyValuePair <bool, DateTime>(false, entity.ExpireDateTime);
}
}
}
private async Task InitCooperateRequestAsync(CancellationToken cancellationToken)
{
try
{
var ids = _cooperateRequest.Ids;
var random = new Random();
var orderedIds = ids.OrderBy(k => random.Next(ids.Count));
try
{
using (var cooperateContext = new CooperateContext(_options))
{
await cooperateContext.Database.EnsureCreatedAsync(cancellationToken);
}
}
catch
{
// ignored
}
foreach (var oneId in orderedIds)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
await GetOrAddOneCooperateItem(cancellationToken, oneId);
await Task.Delay(random.Next(20), cancellationToken);
}
}
catch (Exception e)
{
_exceptionsInBackground.Add(e);
}
}
