public void broadcast(final int gateIndex, final MemoryView buffer) {
// sanity check.
if (buffer == null) throw new IllegalArgumentException("buffer == null");
final UUID srcTaskID = runtime.getNodeDescriptor().taskID;
buffer.setRefCount(outputBinding.get(gateIndex).size());
for (int i = 0; i < outputBinding.get(gateIndex).size(); ++i) {
final UUID dstTaskID =
runtime.getBindingDescriptor().outputGateBindings.get(gateIndex).get(i).taskID;
final IOEvents.TransferBufferEvent event =
new IOEvents.TransferBufferEvent(srcTaskID, dstTaskID, buffer);
outputGates.get(gateIndex).writeDataToChannel(i, event);
}
}