public synchronized void add(final CacheRequest request, final CacheManager manager) {
final RequestIdentifier identifier = request.createIdentifier();
// Is in progress? If so, add late joiner. or, cancel if requested.
if (downloadsInProgress.containsKey(identifier)) {
if (request.cancelExisting) {
downloadsInProgress.get(identifier).cancel();
} else {
downloadsInProgress.get(identifier).addLateJoiner(request);
return;
}
}
// Is the priority <= 0? If so, spin up a new thread and run immediately.
if (request.priority <= 0) {
final CacheDownload download;
if (downloadsQueued.containsKey(identifier)) {
download = downloadsQueued.remove(identifier);
download.addLateJoiner(request);
} else {
download = new CacheDownload(request, manager, this);
}
downloadsInProgress.put(identifier, download);
new CacheDownloadThread(this, download, true);
return;
}
// Is in queue? If so, add late joiner
if (downloadsQueued.containsKey(identifier)) {
downloadsQueued.get(identifier).addLateJoiner(request);
return;
}
// Otherwise, add to queue and notify all
downloadsQueued.put(identifier, new CacheDownload(request, manager, this));
notifyAll();
}
public RequestIdentifier createIdentifier() {
return initiator.createIdentifier();
}
