*/
public abstract class UpdateMessageBroker
{
- private static final int MAXIMUM_NUMBER_SUBSCRIBERS = 6;
+ private static final int MAXIMUM_NUMBER_SUBSCRIBERS = 8;
+ /** Array of all subscribers */
private static DataSubscriber[] _subscribers = new DataSubscriber[MAXIMUM_NUMBER_SUBSCRIBERS];
- private static int _subscriberNum = 0;
+ /** Index from which to start looking for an empty slot*/
+ private static int _searchStartIndex = 0;
+ /** Enable/disabled flag */
+ private static boolean _enabled = true;
/**
*/
public static void addSubscriber(DataSubscriber inSub)
{
- _subscribers[_subscriberNum] = inSub;
- _subscriberNum++;
+ // Loop looking for first null entry
+ for (int i=_searchStartIndex; i<MAXIMUM_NUMBER_SUBSCRIBERS; i++)
+ {
+ if (_subscribers[i] == null)
+ {
+ _subscribers[i] = inSub;
+ _searchStartIndex = i+1;
+ break;
+ }
+ }
}
+ /**
+ * Remove the given subscriber from the list
+ * @param inSub subscriber to remove
+ */
+ public static void removeSubscriber(DataSubscriber inSub)
+ {
+ for (int i=0; i<MAXIMUM_NUMBER_SUBSCRIBERS; i++)
+ {
+ if (_subscribers[i] == inSub)
+ {
+ _subscribers[i] = null;
+ // Could break out of the loop here but we want to make sure we remove all of them
+ }
+ }
+ _searchStartIndex = 0; // for the next add, start from beginning to ensure all gaps are filled
+ }
+
+ /**
+ * Enable or disable the messaging (to allow temporary disabling for multiple operations)
+ * @param inEnabled false to disable, true to enable again
+ */
+ public static void enableMessaging(boolean inEnabled)
+ {
+ _enabled = inEnabled;
+ }
/**
* Send a message to all subscribers that
public static void informSubscribers(byte inChange)
{
// TODO: Launch separate thread so that whatever caused the inform can finish
+ if (!_enabled) return;
for (int i=0; i<_subscribers.length; i++)
{
if (_subscribers[i] != null)
*/
public static void informSubscribers(String inMessage)
{
+ if (!_enabled) return;
for (int i=0; i<_subscribers.length; i++)
{
if (_subscribers[i] != null)