Replaced Thread.sleep by TimeUnit.SECONDS.sleep and colleagues. Doesn…

…'t change the way the code works and still uses Thread.sleep internally, but now the code is much easier to read.

src/main/java/de/fabianonline/telegram_backup/DownloadManager.java

@@ -45,6 +45,7 @@
 import java.util.Random;
 import java.net.URL;
 import java.util.concurrent.TimeoutException;
+import java.util.concurrent.TimeUnit;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
 
@@ -84,7 +85,7 @@ public void downloadMessages(Integer limit) throws RpcErrorException, IOExceptio
 				System.out.println("");
 				System.out.println("Telegram took too long to respond to our request.");
 				System.out.println("I'm going to wait a minute and then try again.");
-				try { Thread.sleep(60*1000); } catch(InterruptedException e2) {}
+				try { TimeUnit.MINUTES.sleep(1); } catch(InterruptedException e2) {}
 				System.out.println("");
 			}
 		} while (!completed);
@@ -185,7 +186,7 @@ private void downloadMessages(List<Integer> ids) throws RpcErrorException, IOExc
 			db.saveUsers(response.getUsers());
 			logger.trace("Sleeping");
 			try {
-				Thread.sleep(Config.DELAY_AFTER_GET_MESSAGES);
+				TimeUnit.MILLISECONDS.sleep(Config.DELAY_AFTER_GET_MESSAGES);
 			} catch (InterruptedException e) {}
 		}
 		logger.debug("Finished.");
@@ -212,7 +213,7 @@ public void downloadMedia() throws RpcErrorException, IOException {
 				System.out.println("");
 				System.out.println("Telegram took too long to respond to our request.");
 				System.out.println("I'm going to wait a minute and then try again.");
-				try { Thread.sleep(60*1000); } catch(InterruptedException e2) {}
+				try { TimeUnit.MINUTES.sleep(1); } catch(InterruptedException e2) {}
 				System.out.println("");
 			}
 		} while (!completed);
@@ -302,7 +303,7 @@ private static boolean downloadFileFromDc(TelegramClient client, String target,
 
 				fos.write(response.getBytes().getData());
 				fos.flush();
-				try { Thread.sleep(Config.DELAY_AFTER_GET_FILE); } catch(InterruptedException e) {}
+				try { TimeUnit.MILLISECONDS.sleep(Config.DELAY_AFTER_GET_FILE); } catch(InterruptedException e) {}
 			} while(offset < size && response.getBytes().getData().length>0);
 			fos.close();
 			if (offset < size) {
@@ -322,7 +323,7 @@ private static boolean downloadFileFromDc(TelegramClient client, String target,
 				} catch (IOException e) {
 					logger.debug("Exception during move. rename_tries: {}. Exception: {}", rename_tries, e);
 					last_exception = e;
-					try { Thread.sleep(Config.RENAMING_DELAY); } catch (InterruptedException e2) {}
+					try { TimeUnit.MILLISECONDS.sleep(Config.RENAMING_DELAY); } catch (InterruptedException e2) {}
 				}
 			}
 			if (last_exception != null) {

src/main/java/de/fabianonline/telegram_backup/Utils.java

@@ -19,6 +19,7 @@
 import java.io.File;
 import java.util.List;
 import java.util.Vector;
+import java.util.concurrent.TimeUnit;
 import com.google.gson.*;
 import java.net.URL;
 import org.apache.commons.io.IOUtils;
@@ -59,7 +60,7 @@ static void obeyFloodWaitException(RpcErrorException e) throws RpcErrorException
 			"Ctrl+C. You can restart me at any time and I will just continue to download your\n" +
 			"messages and media. But be advised that just restarting me is not going to change\n" +
 			"the fact that Telegram won't talk to me until then.");
-		try { Thread.sleep((delay + 1) * 1000); } catch(InterruptedException e2) {}
+		try { TimeUnit.SECONDS.sleep(delay + 1); } catch(InterruptedException e2) {}
 		System.out.println("");
 	}