private void DoWork(object state)
{
if (_isRunning)
{
return;
}
Task.Run(async() =>
{
try
{
using (var scope = _scopeFactory.CreateScope())
{
var dbContext = scope.ServiceProvider.GetRequiredService <WalletDbContext>();
if (!(dbContext.PageData.FirstOrDefault()?.IsTransactionsSaved ?? false))
{
return;
}
_isRunning = true;
_lastBlockNumber = (int)(await _explorer.GetLastAvailableBlockNumber()).Value;
if (_lastCheckedBlockNumber == 0)
{
_lastCheckedBlockNumber = (int)(dbContext.BlockChainTransactions
.Max(w => w.BlockNumber));
}
if (_lastCheckedBlockNumber < _lastBlockNumber)
{
var transactions = _explorer.GetLatestTransactions(_lastCheckedBlockNumber,
_lastCheckedBlockNumber);
dbContext.BlockChainTransactions.AddRange(transactions);
dbContext.SaveChanges();
_lastCheckedBlockNumber++;
}
_isRunning = false;
}
}
catch (Exception e)
{
_isRunning = false;
}
});
}
public async Task <IActionResult> SaveLatestTransactions()
{
var status = _dbContext.PageData.FirstOrDefault();
if (status != null && status.IsTransactionsSaved)
{
return(Ok());
}
var lastKnownBlockNumber = (int)(await _explorer.GetLastAvailableBlockNumber()).Value;
var tasks = new List <Task <List <BlockChainTransaction> > >();
for (int i = lastKnownBlockNumber - 5000; i < lastKnownBlockNumber; i += 100)
{
var i1 = i;
var task = Task.Run(() => _explorer.GetLatestTransactions(i1, i1 + 99));
tasks.Add(task);
}
await Task.WhenAll(tasks);
var result = new List <BlockChainTransaction>();
foreach (var task in tasks)
{
task.Result.ForEach(t => result.Add(t));
}
_dbContext.ChangeTracker.AutoDetectChangesEnabled = false;
var tempList = new List <BlockChainTransaction>();
foreach (var transact in result)
{
tempList.Add(transact);
if (tempList.Count == 100)
{
try
{
_dbContext.BlockChainTransactions.AddRange(tempList);
_dbContext.SaveChanges();
tempList.Clear();
}
catch (Exception e)
{
tempList.Clear();
}
}
}
_dbContext.ChangeTracker.AutoDetectChangesEnabled = true;
var lastSavedNumber = (int)(_dbContext.BlockChainTransactions
.Max(w => w.BlockNumber));
lastKnownBlockNumber = (int)(await _explorer.GetLastAvailableBlockNumber()).Value;
var newTransacts = _explorer.GetLatestTransactions(lastSavedNumber, lastKnownBlockNumber);
_dbContext.BlockChainTransactions.AddRange(newTransacts);
_dbContext.SaveChanges();
var data = _dbContext.PageData.FirstOrDefault();
if (data != null)
{
data.IsTransactionsSaved = true;
_dbContext.PageData.Update(data);
}
_dbContext.SaveChanges();
return(Ok());
}