CODEWITHSUNDEEP
javadownload
Tijan
Tijan

Reputation: 15

Calculate remaining time for a multiple connection parrallel download

I have a Java program that downloads a file from a server, using 8 parallel connections. The file is downloaded in 8 parts and assembled at the end. How can I calculate the remaining time of downloading?

Upvotes: 0

Views: 60

Answers (2)

Tijan
Tijan

Reputation: 15

This method worked for me :

private String calculateRemainingTime(long bytesDownloaded, long totalBytes, long elapsedTime){

        if (bytesDownloaded == 0) {
            return "Calculating...";
        }
        long bytesRemaining = totalBytes - bytesDownloaded;
        long estimatedTimeRemaining = (bytesRemaining * elapsedTime) / bytesDownloaded;
        long seconds = (estimatedTimeRemaining / 1000) % 60;
        long minutes = (estimatedTimeRemaining / (1000 * 60)) % 60;
        long hours = (estimatedTimeRemaining / (1000 * 60 * 60)) % 24;
        return String.format("%02d:%02d:%02d", hours, minutes, seconds);
    }

Upvotes: 0

Manuver Khan
Manuver Khan

Reputation: 36

first try to calculate download speed over 5-10 second period like

speed = downloaded_bytes_from_all_8_connections_in_last_10seconds/10

it'll give you average speed over last 10 seconds

now just use simple math to get the remaining time,

remaning_number_of_seconds = total_remaining_bytes/speed

Upvotes: 2

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