/** Non blocking if the socket is not blocking. */
private boolean _drain() {
while (true) {
synchronized (outQueue) {
if (out == null) {
out = prioriyQueue.poll();
if (out == null) {
out = outQueue.poll();
}
if (out == null) {
return false;
}
if (goAway < out.streamId) {
// TODO
}
try {
if (!out.c) {
// late: IDs are assigned as we send ( priorities may affect
// the transmission order )
if (out.stream != null) {
out.streamId = out.stream.getRequest().streamId;
}
} else if (out.type == TYPE_SYN_STREAM) {
out.fixNV(18);
if (compressSupport != null) {
compressSupport.compress(out, 18);
}
} else if (out.type == TYPE_SYN_REPLY || out.type == TYPE_HEADERS) {
out.fixNV(14);
if (compressSupport != null) {
compressSupport.compress(out, 14);
}
}
} catch (IOException ex) {
abort("Compress error");
return false;
}
if (out.type == TYPE_SYN_STREAM) {
out.streamId = outStreamId;
outStreamId += 2;
synchronized (channels) {
channels.put(Integer.valueOf(out.streamId), out.stream);
}
}
out.serializeHead();
}
if (out.endData == out.off) {
out = null;
continue;
}
}
if (SpdyContext.debug) {
trace("> " + out);
}
try {
int toWrite = out.endData - out.off;
int wr;
while (toWrite > 0) {
wr = write(out.data, out.off, toWrite);
if (wr < 0) {
return false;
}
if (wr == 0) {
return true; // non blocking or to
}
if (wr <= toWrite) {
out.off += wr;
toWrite -= wr;
}
}
synchronized (channels) {
if (out.stream != null) {
if (out.isHalfClose()) {
out.stream.finSent = true;
}
if (out.stream.finRcvd && out.stream.finSent) {
channels.remove(Integer.valueOf(out.streamId));
}
}
}
out = null;
} catch (IOException e) {
// connection closed - abort all streams
e.printStackTrace();
onClose();
return false;
}
}
}
