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/*
This file is part of GNUnet.
Copyright (C) 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
package org.gnunet.peerstore;
import java.nio.ByteBuffer;
import org.gnunet.mq.Envelope;
import org.gnunet.peerstore.messages.WatchMessage;
import org.gnunet.requests.Request;
import org.gnunet.util.HashCode;
import org.gnunet.util.PeerIdentity;
class WatchRequest extends Request {
public final String sub_system;
public final PeerIdentity peer;
public final String key;
public final PeerstoreWatcher watcher;
public final HashCode hash;
public static HashCode getHash(String sub_system, PeerIdentity peer,
String key) {
int block_size = 0;
block_size += sub_system.length() + 1;
block_size += peer.data.length;
block_size += key.length() + 1;
byte[] block = new byte[block_size];
ByteBuffer target = ByteBuffer.wrap(block);
target.put(sub_system.getBytes());
target.put((byte)'\0');
target.put(peer.data);
target.put(key.getBytes());
target.put((byte)'\0');
return HashCode.hash(block);
}
public WatchRequest(String sub_system, PeerIdentity peer, String key,
PeerstoreWatcher watcher) {
this.sub_system = sub_system;
this.peer = peer;
this.key = key;
this.watcher = watcher;
this.hash = WatchRequest.getHash(sub_system, peer, key);
}
@Override
public Envelope assembleRequest() {
WatchMessage wm = new WatchMessage();
wm.keyhash = this.hash;
return new Envelope(wm);
}
@Override
public void cancel() {
// TODO: send a watch cancel request
}
}
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