001 package market.event; 002 003 import market.SProcessWorker; 004 005 /** 006 * Listener interface that enables Objects to listen to offer specific events and react on them. 007 */ 008 public interface OfferEventListener { 009 010 /** 011 * Invoked when the global count of an article is needed. 012 * 013 * @param articleKey the key of the article which count is needed. 014 * @param spw the SProcessWorker from which the request came from. 015 */ 016 void countArticles(String articleKey, SProcessWorker spw); 017 018 /** 019 * Invoked when a shortage of an article occured. 020 * 021 * @param articleKey the key of the article which is currently unavaible. 022 */ 023 void offerEmpty(String articleKey); 024 025 /** 026 * Invoked when a delivery enters the market. 027 */ 028 void wakeUpOrders(); 029 }