public BufferedImage getTileImage(int x, int y) throws IOException {
SRCachedTile cachedTile = cache.get(new CacheKey(x, y));
BufferedImage image = null;
if (cachedTile != null) {
CachedTile tile = cachedTile.get();
if (tile != null) {
if (tile.loaded) log.trace(String.format("Cache hit: x=%d y=%d", x, y));
image = tile.getImage();
if (!tile.nextLoadJobCreated) {
// log.debug(String.format("Preload job added : x=%d y=%d l=%d",
// x + 1, y, layer));
preloadTile(new CachedTile(new CacheKey(x + 1, y)));
tile.nextLoadJobCreated = true;
}
}
}
if (image == null) {
log.trace(String.format("Cache miss: x=%d y=%d", x, y));
// log.debug(String.format("Preload job added : x=%d y=%d l=%d", x +
// 1, y, layer));
preloadTile(new CachedTile(new CacheKey(x + 1, y)));
image = internalGetTileImage(x, y);
}
return image;
}
@Override
public void run() {
CachedTile tile;
try {
while (true) {
tile = queue.take();
if (tile != null && !tile.loaded) {
// log.trace("Loading image async: " + tile);
tile.loadImage();
}
}
} catch (InterruptedException e) {
log.debug("Image pre-loader thread terminated");
}
}
