/// <inheritdoc />
public async Task <bool> isSessionClaimed(int userId)
{
//TODO: There is a potential race here
if (!await HasSession(userId))
{
return(false);
}
GameSessionModel session = await GetSessionById(userId);
if (session == null)
{
return(false);
}
return(session.isSessionClaimed);
}
/// <inheritdoc />
public async Task <bool> TryClaimSession(Guid sessionGuid)
{
//Check if there is a session in the database first.
if (!await HasSession(sessionGuid))
{
return(false);
}
GameSessionModel session = await GetSessionByGuid(sessionGuid);
if (session == null)
{
return(false);
}
//if it is already claimed we should indicate that the session claiming failed.
if (session.isSessionClaimed)
{
return(false);
}
//This will claim it once the database saves
session.isSessionClaimed = true;
//At this point we should try to claim it
int rowAmountChanged = 0;
try
{
rowAmountChanged = await GameSessionContext.SaveChangesAsync();
}
catch (Exception e) //likely a session was made, due to a race condition, and as a result of our concurrency approach it will throw
{
//TODO: Log the message, but it's very likely to be MySqlException with duplicate insert error code
}
return(rowAmountChanged != 0);
}