sPFFramework/src/main/java/it/polimi/spf/framework/search/SearchScheduler.java
void onInstanceLost(String uniqueIdentifier) {
		log(TAG, "instance lost " + uniqueIdentifier);
		List<String> queriesIds = results.get(uniqueIdentifier);
		if (queriesIds == null) {
			return;
		}
		for (String queryId : queriesIds) {
			String[] args = new String[2];
			args[0] = queryId;
			args[1] = uniqueIdentifier;
			Message msg = handler.obtainMessage(SearchMessages.RESULT_LOST,
					args);
			log(TAG, "sending message RESULT_LOST to handler for queryId: "
					+ queryId);
			handler.sendMessage(msg);
		}
	}
void onInstanceLost(String uniqueIdentifier) {
		log(TAG, "instance lost " + uniqueIdentifier);
		List<String> queriesIds = results.get(uniqueIdentifier);
		if (queriesIds == null) {
			return;
		}
		for (String queryId : queriesIds) {
			String[] args = new String[2];
			args[0] = queryId;
			args[1] = uniqueIdentifier;
			Message msg = handler.obtainMessage(SearchMessages.RESULT_LOST,
					args);
			log(TAG, "sending message RESULT_LOST to handler for queryId: "
					+ queryId);
			handler.sendMessage(msg);
		}
	}
Call this method when the middleware notify that a spf instance is lost.
It will notify the event to all the active searches that have the lost
instance in their results.

@param uniqueIdentifier
the identifier of the lost instance