public CacheReference fetchURICache(URI sourceURI) {
synchronized (uriCache) {
WeakReference<CacheReference> ref = uriCache.get(sourceURI);
if (null == ref) {
return null;
}
CacheReference cacheData = ref.get();
if (null != cacheData) {
if (Logger.canLog(Logger.DEBUG)) {
Logger.logMsg(
Logger.DEBUG,
"Fetched cache entry: URI "
+ sourceURI
+ ", buffer "
+ cacheData.getBuffer()
+ ", MIME type "
+ cacheData.getMIMEType());
}
return cacheData;
}
}
return null;
}
/*
* MIME type is cached so that Locator doesn't need to talk to the server,
* it can just get the type and buffer and be done
*/
public CacheReference registerURICache(URI sourceURI, ByteBuffer data, String mimeType) {
if (Logger.canLog(Logger.DEBUG)) {
Logger.logMsg(
Logger.DEBUG,
"New cache entry: URI " + sourceURI + ", buffer " + data + ", MIME type " + mimeType);
}
// ensure the given ByteBuffer is a direct buffer, required for native access
if (!data.isDirect()) {
data.rewind();
ByteBuffer newData = ByteBuffer.allocateDirect(data.capacity());
newData.put(data);
data = newData;
}
CacheReference ref = new CacheReference(data, mimeType);
synchronized (uriCache) {
uriCache.put(sourceURI, new WeakReference(ref));
}
// Now register sourceURI with the disposer so we can remove it
// from uriCache when our cache entry gets collected
MediaDisposer.addResourceDisposer(ref, sourceURI, cacheDisposer);
return ref;
}