private void doReadAheadLoads() {
List to_submit = null;
try {
lock_mon.enter();
while (loading_messages.size() + queued_messages.size() < request_read_ahead
&& !requests.isEmpty()
&& !destroyed) {
DiskManagerReadRequest dmr = (DiskManagerReadRequest) requests.removeFirst();
loading_messages.add(dmr);
if (to_submit == null) to_submit = new ArrayList();
to_submit.add(dmr);
}
} finally {
lock_mon.exit();
}
/*
if ( peer.getIp().equals( "64.71.5.2")){
TimeFormatter.milliTrace( "obt read_ahead: -> " + (to_submit==null?0:to_submit.size()) +
" [lo=" + loading_messages.size() + ",qm=" + queued_messages.size() + ",re=" + requests.size() + ",rl=" + request_read_ahead + "]");
}
*/
if (to_submit != null) {
for (int i = 0; i < to_submit.size(); i++) {
peer.getManager()
.getAdapter()
.enqueueReadRequest(peer, (DiskManagerReadRequest) to_submit.get(i), read_req_listener);
}
}
}
/**
* Get a list of piece numbers being requested
*
* @return list of Long values
*/
public int[] getRequestedPieceNumbers() {
if (destroyed) return new int[0];
/** Cheap hack to reduce (but not remove all) the # of duplicate entries */
int iLastNumber = -1;
int pos = 0;
int[] pieceNumbers;
try {
lock_mon.enter();
// allocate max size needed (we'll shrink it later)
pieceNumbers = new int[queued_messages.size() + loading_messages.size() + requests.size()];
for (Iterator iter = queued_messages.keySet().iterator(); iter.hasNext(); ) {
BTPiece msg = (BTPiece) iter.next();
if (iLastNumber != msg.getPieceNumber()) {
iLastNumber = msg.getPieceNumber();
pieceNumbers[pos++] = iLastNumber;
}
}
for (Iterator iter = loading_messages.iterator(); iter.hasNext(); ) {
DiskManagerReadRequest dmr = (DiskManagerReadRequest) iter.next();
if (iLastNumber != dmr.getPieceNumber()) {
iLastNumber = dmr.getPieceNumber();
pieceNumbers[pos++] = iLastNumber;
}
}
for (Iterator iter = requests.iterator(); iter.hasNext(); ) {
DiskManagerReadRequest dmr = (DiskManagerReadRequest) iter.next();
if (iLastNumber != dmr.getPieceNumber()) {
iLastNumber = dmr.getPieceNumber();
pieceNumbers[pos++] = iLastNumber;
}
}
} finally {
lock_mon.exit();
}
int[] trimmed = new int[pos];
System.arraycopy(pieceNumbers, 0, trimmed, 0, pos);
return trimmed;
}
public boolean isStalledPendingLoad() {
return (queued_messages.size() == 0 && loading_messages.size() > 0);
}
public int getRequestCount() {
return (queued_messages.size() + loading_messages.size() + requests.size());
}
