public static Page decodePage(ByteBuffer buf) throws IOException {
Page p = new Page();
buf.position(0);
p.setPageNumber(Dlugosz.readLong(buf));
p.setByteOffset(Dlugosz.readLong(buf));
p.setTimeOffset(Dlugosz.readLong(buf));
p.setData(buf.slice());
return p;
}
/** Gets the page, including metadata, as a byte buffer ready for sending over the network */
public static ByteBuffer pageToByteBuffer(Page p) {
int bufLen = encodedPageSize(p);
ByteBuffer result = ByteBuffer.allocate(bufLen);
Dlugosz.encode(p.getPageNumber(), result);
Dlugosz.encode(p.getByteOffset(), result);
Dlugosz.encode(p.getTimeOffset(), result);
p.getData().flip();
result.put(p.getData());
return result;
}
/** @syncpriority 200 */
public void receivePage(Page p) {
synchronized (this) {
// We might have already stopped receiving, in which case the
// pagebuf will be closed
if (!isReceiving()) return;
try {
pageBuf.putPage(p);
} catch (IOException e) {
log.error("Error putting page into buffer", e);
stop();
return;
}
}
prm.notifyPageReceived(p.getPageNumber());
updateStreamStatus();
if (isReceiving() && !isRebroadcasting()) startRebroadcast();
if (pageBuf.getLastContiguousPage() == (pageBuf.getTotalPages() - 1)) receptionCompleted();
}
public static int encodedPageSize(Page p) {
return Dlugosz.bytesToEncode(p.getPageNumber())
+ Dlugosz.bytesToEncode(p.getByteOffset())
+ Dlugosz.bytesToEncode(p.getTimeOffset())
+ p.getData().limit();
}
