2 * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
18 package org.altusmetrum.altosuilib_2;
21 import javax.imageio.ImageIO;
22 import java.awt.image.*;
27 public class AltosSiteMapCache {
28 static final long google_maps_ratelimit_ms = 1200;
29 // Google limits static map queries to 50 per minute per IP, so
30 // each query should take at least 1.2 seconds.
32 static final int success = 0;
33 static final int loading = 1;
34 static final int failed = 2;
35 static final int bad_request = 3;
36 static final int forbidden = 4;
38 public static boolean has_map(File file, String url) {
42 static long forbidden_time;
43 static boolean forbidden_set = false;
44 static final long forbidden_interval = 60l * 1000l * 1000l * 1000l;
46 static private Object fetch_lock = new Object();
48 private static int fetch_one(File file, String url) {
51 System.out.printf("Loading URL %s\n", url);
54 } catch (java.net.MalformedURLException e) {
59 URLConnection uc = null;
61 uc = u.openConnection();
62 String type = uc.getContentType();
63 int contentLength = uc.getContentLength();
64 if (uc instanceof HttpURLConnection) {
65 int response = ((HttpURLConnection) uc).getResponseCode();
67 case HttpURLConnection.HTTP_FORBIDDEN:
68 case HttpURLConnection.HTTP_PAYMENT_REQUIRED:
69 case HttpURLConnection.HTTP_UNAUTHORIZED:
70 forbidden_time = System.nanoTime();
75 InputStream in = new BufferedInputStream(uc.getInputStream());
78 data = new byte[contentLength];
79 while (offset < contentLength) {
80 bytesRead = in.read(data, offset, data.length - offset);
87 if (offset != contentLength)
90 } catch (IOException e) {
95 FileOutputStream out = new FileOutputStream(file);
99 } catch (FileNotFoundException e) {
101 } catch (IOException e) {
109 public static int fetch_map(File file, String url) {
113 if (forbidden_set && (System.nanoTime() - forbidden_time) < forbidden_interval)
116 int status = bad_request;
118 if (!AltosUIVersion.has_google_maps_api_key()) {
119 synchronized (fetch_lock) {
120 long startTime = System.nanoTime();
121 status = fetch_one(file, url);
122 if (status == success) {
123 long duration_ms = (System.nanoTime() - startTime) / 1000000;
124 if (duration_ms < google_maps_ratelimit_ms) {
126 Thread.sleep(google_maps_ratelimit_ms - duration_ms);
127 } catch (InterruptedException e) {
128 Thread.currentThread().interrupt();
134 status = fetch_one(file, url);
139 static final int min_cache_size = 9;
140 static final int max_cache_size = 24;
142 static int cache_size = min_cache_size;
144 static AltosSiteMapImage[] images = new AltosSiteMapImage[cache_size];
146 static Object cache_lock = new Object();
148 public static void set_cache_size(int new_size) {
149 if (new_size < min_cache_size)
150 new_size = min_cache_size;
151 if (new_size > max_cache_size)
152 new_size = max_cache_size;
153 if (new_size == cache_size)
156 synchronized(cache_lock) {
157 AltosSiteMapImage[] new_images = new AltosSiteMapImage[new_size];
159 for (int i = 0; i < cache_size; i++) {
161 new_images[i] = images[i];
166 cache_size = new_size;
172 private static Point tile_loc(AltosSiteMapTile tile) {
173 Rectangle r = tile.getBounds();
177 return new Point (x, y);
180 private static void dump_cache() {
181 int min_x = 1000, max_x = -1000, min_y = 1000, max_y = -1000;
183 for (int i = 0; i < cache_size; i++) {
184 AltosSiteMapImage image = images[i];
186 Point p = tile_loc(image.tile);
187 min_x = min_x < p.x ? min_x : p.x;
188 max_x = max_x > p.x ? max_x : p.x;
189 min_y = min_y < p.y ? min_y : p.y;
190 max_y = max_y > p.y ? max_y : p.y;
191 System.out.printf ("entry %d %d,%d used %d\n", i, p.x, p.y, image.used);
193 System.out.printf ("entry %d empty\n", i);
197 int[][] map = new int[max_x - min_x + 1][max_y - min_y + 1];
198 for (int i = 0; i < cache_size; i++) {
199 AltosSiteMapImage image = images[i];
201 Point p = tile_loc(image.tile);
202 map[p.x - min_x][p.y - min_y]++;
206 for (int y = min_y; y <= max_y; y++) {
207 for (int x = min_x; x <= max_x; x++)
208 System.out.printf (" %2d", map[x - min_x][y - min_y]);
209 System.out.printf("\n");
213 public static AltosSiteMapImage get_image(AltosSiteMapTile tile, File file, int width, int height) {
217 synchronized(cache_lock) {
218 AltosSiteMapImage image = null;
219 for (int i = 0; i < cache_size; i++) {
226 if (image.tile == tile && file.equals(image.file)) {
230 if (image.used < age) {
237 image = new AltosSiteMapImage(tile, file, width, height);
239 if (images[oldest] != null) {
241 AltosSiteMap.debug_component(images[oldest].tile, "replacing cache");
242 AltosSiteMap.debug_component(tile, "replaced cache");
243 images[oldest].flush();
245 images[oldest] = image;
247 } catch (IOException e) {