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);
}
}
}
/**
* Remove an outstanding piece data request.
*
* @param piece_number
* @param piece_offset
* @param length
*/
public void removePieceRequest(int piece_number, int piece_offset, int length) {
if (destroyed) return;
DiskManagerReadRequest dmr =
peer.getManager().getDiskManager().createReadRequest(piece_number, piece_offset, length);
try {
lock_mon.enter();
if (requests.contains(dmr)) {
requests.remove(dmr);
return;
}
if (loading_messages.contains(dmr)) {
loading_messages.remove(dmr);
return;
}
for (Iterator i = queued_messages.entrySet().iterator(); i.hasNext(); ) {
Map.Entry entry = (Map.Entry) i.next();
if (entry.getValue().equals(dmr)) { // it's already been queued
BTPiece msg = (BTPiece) entry.getKey();
if (outgoing_message_queue.removeMessage(msg, true)) {
i.remove();
}
break; // do manual listener notify
}
}
} finally {
lock_mon.exit();
}
outgoing_message_queue.doListenerNotifications();
}
/**
* 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;
}
/**
* Register a new piece data request.
*
* @param piece_number
* @param piece_offset
* @param length
*/
public void addPieceRequest(int piece_number, int piece_offset, int length) {
if (destroyed) return;
DiskManagerReadRequest dmr =
peer.getManager().getDiskManager().createReadRequest(piece_number, piece_offset, length);
try {
lock_mon.enter();
requests.addLast(dmr);
} finally {
lock_mon.exit();
}
doReadAheadLoads();
}
/** Remove all outstanding piece data requests. */
public void removeAllPieceRequests() {
if (destroyed) return;
try {
lock_mon.enter();
// removed this trace as Alon can't remember why the trace is here anyway and as far as I can
// see there's nothing to stop a piece being delivered to transport and removed from
// the message queue before we're notified of this and thus it is entirely possible that
// our view of queued messages is lagging.
// String before_trace = outgoing_message_queue.getQueueTrace();
/*
int num_queued = queued_messages.size();
int num_removed = 0;
for( Iterator i = queued_messages.keySet().iterator(); i.hasNext(); ) {
BTPiece msg = (BTPiece)i.next();
if( outgoing_message_queue.removeMessage( msg, true ) ) {
i.remove();
num_removed++;
}
}
if( num_removed < num_queued -2 ) {
Debug.out( "num_removed[" +num_removed+ "] < num_queued[" +num_queued+ "]:\nBEFORE:\n" +before_trace+ "\nAFTER:\n" +outgoing_message_queue.getQueueTrace() );
}
*/
for (Iterator i = queued_messages.keySet().iterator(); i.hasNext(); ) {
BTPiece msg = (BTPiece) i.next();
outgoing_message_queue.removeMessage(msg, true);
}
queued_messages.clear(); // this replaces stuff above
requests.clear();
loading_messages.clear();
} finally {
lock_mon.exit();
}
outgoing_message_queue.doListenerNotifications();
}
public int getRequestCount() {
return (queued_messages.size() + loading_messages.size() + requests.size());
}