C#•3y ago

✅ Multi-Threading not working

My multithreading isn't working Code:

tasks.Add(
                        Task.Run(() =>
                        {
                            DateTimeOffset findClosestToo = new DateTimeOffset(item.date.Year, item.date.Month, item.date.Day, item.date.Hour, 0, 0, TimeSpan.Zero);
                            NasaPower result;
                            Task<NasaPower> request = null;

                            if ((findClosestToo - previous).Duration() > (findClosestToo - item.date).Duration())
                            {
                                request = _client.GetFromJsonAsync<NasaPower>("?start=" + start.ToString("yyyyMMdd") + "&end=" + end.AddDays(1).ToString("yyyyMMdd") + "&latitude=" + item.latitude + "&longitude=" + item.longitude + "&community=re&parameters=ALLSKY_SFC_SW_DWN&format=json&header=true&time-standard=utc");
                            }
                       else
                            {
                                request = _client.GetFromJsonAsync<NasaPower>("?start=" + start.ToString("yyyyMMdd") + "&end=" + end.AddDays(1).ToString("yyyyMMdd") + "&latitude=" + previousItem.latitude + "&longitude=" + previousItem.longitude + "&community=re&parameters=ALLSKY_SFC_SW_DWN&format=json&header=true&time-standard=utc");
                            }

                            request.Wait();
                            result = request.Result;

                            solarPotential += result.properties.parameter.ALLSKY_SFC_SW_DWN[findClosestToo.ToString("yyyyMMddHH")];
                            Console.WriteLine(findClosestToo + "\t\t" + result.properties.parameter.ALLSKY_SFC_SW_DWN[findClosestToo.ToString("yyyyMMddHH")] + "\t\t" + solarPotential);
                            lock (outputResults)
                            {
                                outputResults.Add(new object[] { findClosestToo, result.properties.parameter.ALLSKY_SFC_SW_DWN[findClosestToo.ToString("yyyyMMddHH")], solarPotential });
}
}));

tasks.Add(
                        Task.Run(() =>
                        {
                            DateTimeOffset findClosestToo = new DateTimeOffset(item.date.Year, item.date.Month, item.date.Day, item.date.Hour, 0, 0, TimeSpan.Zero);
                            NasaPower result;
                            Task<NasaPower> request = null;

                            if ((findClosestToo - previous).Duration() > (findClosestToo - item.date).Duration())
                            {
                                request = _client.GetFromJsonAsync<NasaPower>("?start=" + start.ToString("yyyyMMdd") + "&end=" + end.AddDays(1).ToString("yyyyMMdd") + "&latitude=" + item.latitude + "&longitude=" + item.longitude + "&community=re&parameters=ALLSKY_SFC_SW_DWN&format=json&header=true&time-standard=utc");
                            }
                       else
                            {
                                request = _client.GetFromJsonAsync<NasaPower>("?start=" + start.ToString("yyyyMMdd") + "&end=" + end.AddDays(1).ToString("yyyyMMdd") + "&latitude=" + previousItem.latitude + "&longitude=" + previousItem.longitude + "&community=re&parameters=ALLSKY_SFC_SW_DWN&format=json&header=true&time-standard=utc");
                            }

                            request.Wait();
                            result = request.Result;

                            solarPotential += result.properties.parameter.ALLSKY_SFC_SW_DWN[findClosestToo.ToString("yyyyMMddHH")];
                            Console.WriteLine(findClosestToo + "\t\t" + result.properties.parameter.ALLSKY_SFC_SW_DWN[findClosestToo.ToString("yyyyMMddHH")] + "\t\t" + solarPotential);
                            lock (outputResults)
                            {
                                outputResults.Add(new object[] { findClosestToo, result.properties.parameter.ALLSKY_SFC_SW_DWN[findClosestToo.ToString("yyyyMMddHH")], solarPotential });
}
}));

13 Replies

phaseshift•3y ago

what classifies as 'isnt working'?

MastaltOP•3y ago

it basically just jumps it, my list outputResults isn't getting filled

phaseshift•3y ago

'jumps it' sounds like its throwing an exception

MastaltOP•3y ago

nope, just runs straight through

Kouhai•3y ago

When you place a breakpoint on this line lock (outputResults) does the debugger break or it's never reached?

phaseshift•3y ago

wdym 'runs through'? It can't run code and do nothing at the same time

MastaltOP•3y ago

not run but it just doesn't execute it, it continues without doing anything inside the task, not filling my list and not doing the writeline

phaseshift•3y ago

did you debug and watch what happens? Again, it sounds like its throwing

MastaltOP•3y ago

yep, just skipping over the task, not throwing any exception

phaseshift•3y ago

No, if the task throws, you will only know when you get the result or await it Since you're not showing what you do with the task... we don't know if it threw or not it will not be 'just skipping it' ^^

MastaltOP•3y ago

oh wait im stupid forgot the Task.WaitAll at the end...

mtreit•3y ago

sync over async <a:Shaking_Eyes:907681222619185233>

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity. Closed!

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✅ Multi-Threading not working