private void Exec(int jobId, double pcPercent, double conflictGuarantee, IConflictResolver resolver)
{
bool claimIt = false;
if (s_rng.NextDouble() < pcPercent)
claimIt = true;
var cs = BuildChangeSet(jobId);
var dc = new Rel.Data.Ef6.TpContext();
var res = resolver;
var csp = new ChangeSetProcessor(dc, res);
ChangeSet result;
if (s_rng.NextDouble() < conflictGuarantee)
{
Touch(jobId, cs);
}
using (new Timed(false, "ChangeSet {0}", res.GetType().Name))
result = csp.Process(jobId, claimIt, cs);
}
private ChangeSet BuildChangeSet(int jobId)
{
var dc = new Rel.Data.Ef6.TpContext();
IList<Asset> assets;
int count;
using (var scope = new TransactionScope())
{
int take = s_rng.Next(s_minCsSize, s_maxCsSize);
assets = dc.Database.SqlQuery<Asset>(
@"SELECT
Id
,JobId
,Name
,RowVersion
,ServiceArea
,PercentTolerance
,StaticTolerance
,MonotonicTolerance
,MaximumAndMinimumDecay
,MaxMinDecayWithStepAndTol
,MinimumDecay
FROM ( SELECT * FROM dbo.Asset WITH(NOLOCK) WHERE JobId=@p0 ) a
ORDER BY PercentTolerance ASC OFFSET 0 ROWS
FETCH NEXT @p1 ROWS ONLY", jobId, take).ToList();
count = dc.Database.SqlQuery<int>(@"SELECT COUNT(Id) FROM dbo.Asset WITH(NOLOCK) WHERE JobId=@p0", jobId).Single();
scope.Complete();
}
var cs = new ChangeSet()
{
Assets = assets
.Select(ModifyAsset)
.Union(NewAssets(jobId, s_rng.Next(1, (int)Math.Ceiling(assets.Count * 0.3)))).ToList()
};
s_assetCount[jobId - 1].IncrementBy(count);
s_assetCountBase[jobId - 1].Increment();
return cs;
}
private void EnsureJobIsNotLocked(int jobId, Exception ex, string username)
{
var dc = new Rel.Data.Ef6.TpContext();
while (true)
{
try
{
using (var scope = new System.Transactions.TransactionScope(TransactionScopeOption.RequiresNew))
{
using (new Timed(false, "EnsuringNoLock job {0}-{1}", jobId, username))
{
var updated = dc.Database.ExecuteSqlCommand(
"SET DEADLOCK_PRIORITY 10;UPDATE dbo.Job SET LockedBy=NULL,LockedOn=NULL WHERE Id=@p0 AND LockedBy=@p1",
jobId, username);
}
scope.Complete();
break;
}
}
catch (Exception)
{
continue;
}
}
if (ex != null)
{
var e = ex;
while (e != null)
{
if (e is Rel.Data.ConcurrencyException)
return;
if (e is PessimisticConcurrencyException)
{
System.Threading.Thread.Sleep(100);
return;
}
if (e is ValidationException)
return;
if (ex.InnerException != null)
ex = ex.InnerException;
}
throw ex;
}
}
private static void PreseedDB()
{
using (var ctx = new Rel.Data.Ef6.TpContext())
{
var cmd = @"
DECLARE @cnt int = 0;
UPDATE Job SET LockedBy=null, LockedOn=null WHERE LockedBy IS NOT NULL AND id=@p0
DELETE FROM Asset WHERE JobId=@p0;
WHILE @cnt < @p1
BEGIN
INSERT INTO Asset (JobId, Name, ServiceArea,PercentTolerance,StaticTolerance,MonotonicTolerance,MaximumAndMinimumDecay,MaxMinDecayWithStepAndTol,MinimumDecay)
SELECT @p0, CAST(NEWID() as char(36)), CAST(NEWID() as char(36)), rand(),rand(),rand(),rand(),rand(),rand()
SET @cnt = @cnt+ 1;
END
";
ctx.Database.ExecuteSqlCommand(cmd, 1, s_initialPoolSize);
ctx.Database.ExecuteSqlCommand(cmd, 2, s_initialPoolSize);
}
}
