X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altosui%2FAltosSiteMapCache.java;h=03dc3cf5d67ebc8a3170d863d8557c75258452c1;hp=2e62cc454f71fcfa27ef782bd926395e64a5dddf;hb=13cf4000bd53ac4af66231d56e24c9eb11178a5f;hpb=1681c57cbbfc5214dbc2a519e54ce9f29ffe3921

diff --git a/altosui/AltosSiteMapCache.java b/altosui/AltosSiteMapCache.java
index 2e62cc45..03dc3cf5 100644
--- a/altosui/AltosSiteMapCache.java
+++ b/altosui/AltosSiteMapCache.java
@@ -17,22 +17,21 @@
 
 package altosui;
 
-import java.awt.*;
-import java.awt.image.*;
-import java.awt.event.*;
 import javax.swing.*;
 import javax.imageio.ImageIO;
-import javax.swing.table.*;
+import java.awt.image.*;
 import java.io.*;
-import java.util.*;
-import java.text.*;
-import java.util.prefs.*;
 import java.net.URL;
 import java.net.URLConnection;
 
 public class AltosSiteMapCache extends JLabel {
+	static final long google_maps_ratelimit_ms = 1200;
+	// Google limits static map queries to 50 per minute per IP, so
+	// each query should take at least 1.2 seconds.
+
 	public static boolean fetchMap(File file, String url) {
 		URL u;
+		long startTime = System.nanoTime();
 
 		try {
 			u = new URL(url);
@@ -76,6 +75,16 @@ public class AltosSiteMapCache extends JLabel {
 			}
 			return false;
 		}
+
+		long duration_ms = (System.nanoTime() - startTime) / 1000000;
+		if (duration_ms < google_maps_ratelimit_ms) {
+			try {
+				Thread.sleep(google_maps_ratelimit_ms - duration_ms);
+			} catch (InterruptedException e) {
+				Thread.currentThread().interrupt();
+			}
+		}
+
 		return true;
 	}
 
@@ -94,7 +103,14 @@ public class AltosSiteMapCache extends JLabel {
 		}
 
 		try {
-			return new ImageIcon(ImageIO.read(pngfile));
+			BufferedImage	img;
+
+			img = ImageIO.read(pngfile);
+			if (img == null) {
+				System.out.printf("# Can't read pngfile %s\n", pngfile);
+				return null;
+			}
+			return new ImageIcon(img);
 		} catch (IOException e) {
 			System.out.printf("# IO error trying to load %s\n", pngfile);
 			return null;