Method update

routing/ActiveRouter.java:580–632

Checks out all sending connections to finalize the ready ones and abort those whose connection went down. Also drops messages whose TTL <= 0 (checking every one simulated minute). @see #addToSendingConnections(Connection)

()

	 * @see #addToSendingConnections(Connection)
	 */
	@Override
	public void update() {		
		super.update();
		
		/* in theory we can have multiple sending connections even though
		  currently all routers allow only one concurrent sending connection */
		for (int i=0; i<this.sendingConnections.size(); ) {
			boolean removeCurrent = false;
			Connection con = sendingConnections.get(i);
			
			/* finalize ready transfers */
			if (con.isMessageTransferred()) {
				if (con.getMessage() != null) {
					transferDone(con);
					con.finalizeTransfer();
				} /* else: some other entity aborted transfer */
				removeCurrent = true;
			}
			/* remove connections that have gone down */
			else if (!con.isUp()) {
				if (con.getMessage() != null) {
					transferAborted(con);
					con.abortTransfer();
				}
				removeCurrent = true;
			} 
			
			if (removeCurrent) {
				// if the message being sent was holding excess buffer, free it
				if (this.getFreeBufferSize() < 0) {
					this.makeRoomForMessage(0);
				}
				sendingConnections.remove(i);
			}
			else {
				/* index increase needed only if nothing was removed */
				i++;
			}
		}
		
		/* time to do a TTL check and drop old messages? Only if not sending */
		if (SimClock.getTime() - lastTtlCheck >= TTL_CHECK_INTERVAL && 
				sendingConnections.size() == 0) {
			dropExpiredMessages();
			lastTtlCheck = SimClock.getTime();
		}
		
		if (energy != null) {
			/* TODO: add support for other interfaces */
			NetworkInterface iface = getHost().getInterface(1);
			energy.update(iface, getHost().getComBus());
		}
	}
	
	/**
	 * Method is called just before a transfer is aborted at {@link #update()}