public async Task ImportForeignFscOwners(WRLDCWarehouseDbContext _context, ILogger _log, string oracleConnStr, EntityWriteOption opt)
{
FscOwnerExtract fscOwnerExtract = new FscOwnerExtract();
List <FscOwnerForeign> fscOwnerForeignList = fscOwnerExtract.ExtractFscOwnersForeign(oracleConnStr);
LoadFscOwner loadFscOwner = new LoadFscOwner();
foreach (FscOwnerForeign fscOwnerForeign in fscOwnerForeignList)
{
FscOwner insertedFscOwner = await loadFscOwner.LoadSingleAsync(_context, _log, fscOwnerForeign, opt);
}
}
public async Task <FscOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, FscOwnerForeign fscOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
FscOwner existingFscOwner = await _context.FscOwners.SingleOrDefaultAsync(fO => fO.WebUatId == fscOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingFscOwner != null)
{
return(existingFscOwner);
}
// find the Fsc via the Fsc WebUatId
int fscWebUatId = fscOwnerForeign.FscWebUatId;
Fsc fsc = await _context.Fscs.SingleOrDefaultAsync(c => c.WebUatId == fscWebUatId);
// if Fsc doesnot exist, skip the import. Ideally, there should not be such case
if (fsc == null)
{
_log.LogCritical($"Unable to find Fsc with webUatId {fscWebUatId} while inserting FscOwner with webUatId {fscOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the Fsc via the Owner WebUatId
int ownerWebUatId = fscOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Unable to find Owner with webUatId {ownerWebUatId} while inserting FscOwner with webUatId {fscOwnerForeign.WebUatId}");
return(null);
}
try
{
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingFscOwner != null)
{
_context.FscOwners.Remove(existingFscOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingFscOwner == null || (opt == EntityWriteOption.Replace && existingFscOwner != null))
{
FscOwner newFscOwner = new FscOwner();
newFscOwner.OwnerId = owner.OwnerId;
newFscOwner.FscId = fsc.FscId;
newFscOwner.WebUatId = fscOwnerForeign.WebUatId;
_context.FscOwners.Add(newFscOwner);
await _context.SaveChangesAsync();
return(newFscOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingFscOwner != null)
{
existingFscOwner.OwnerId = owner.OwnerId;
existingFscOwner.FscId = fsc.FscId;
await _context.SaveChangesAsync();
return(existingFscOwner);
}
}
catch (DbUpdateException e)
{
_log.LogCritical($"Error occured while inserting FscOwner with webUatId {fscOwnerForeign.WebUatId}, owner id {owner.OwnerId} and fscId {fsc.FscId}");
_log.LogCritical($"EntityWriteOption = {opt.ToString()}");
_log.LogCritical($"{e.Message}");
return(null);
}
return(null);
}
