From a43d1f0013c7f2cb7595a1fe1a5cfd99a441d0b4 Mon Sep 17 00:00:00 2001
From: Pacien TRAN-GIRARD
Date: Wed, 11 May 2016 17:39:14 +0200
Subject: Implement delay management

---
 src/ch/epfl/xblast/server/Server.java | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

(limited to 'src/ch')

diff --git a/src/ch/epfl/xblast/server/Server.java b/src/ch/epfl/xblast/server/Server.java
index 0989d55..6d8db2c 100644
--- a/src/ch/epfl/xblast/server/Server.java
+++ b/src/ch/epfl/xblast/server/Server.java
@@ -20,6 +20,8 @@ import java.util.*;
 public class Server {
 
     public static final int DEFAULT_PORT = 2016;
+
+    private static final long REFRESH_RATE = (long) (50 * 1E6); // nanosecond
     private static final int DEFAULT_EXPECTED_CLIENTS = PlayerID.values().length;
 
     private static class Channel {
@@ -133,6 +135,14 @@ public class Server {
 
     }
 
+    private static void delay(long ns) {
+        try {
+            Thread.sleep((long) (ns / 1E6), (int) (ns % 1E6));
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
     private final Channel channel;
     private final int expectedClients;
 
@@ -160,15 +170,11 @@ public class Server {
         GameState gameState = GameState.DEFAULT_GAME_STATE;
 
         while (!gameState.isGameOver()) {
+            long computationStartTime = System.nanoTime();
+
             gameState = updateGameState(updateGameState(gameState));
-            // TODO: send updated game state to clients
 
-            try {
-                Thread.sleep(10000);
-                // TODO: adapt sleeping time
-            } catch (InterruptedException e) {
-                e.printStackTrace();
-            }
+            delay(REFRESH_RATE - (computationStartTime - System.nanoTime()));
         }
     }
 
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