1 2 3 4 5 6 7 8 9 10 11 12 13 | public class Inventory{ …… private Map<String, InventoryListner> listeners = new HashMap<String,InventoryListner>(); …… public void register(String id, InventoryListner listener){ listeners.put(id, listener); } public void deregister(String id){ listeners.remove(id); } …… } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | public class Inventory{ …… public void addBookItem(String bookName,String auther,String price, String category){ //codes for adding books categoryChanged(); } public void removeBookItem(String bookName,String auther, String price,String category){ //codes for deleting books categoryChanged(); } private synchronized void categoryChanged(){ for (InventoryListner listener : listeners.values()) { listener.categoryChanged(); } } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | public interface InventoryListner { public abstract void categoryChanged(); } public class InventoryBean implements InventoryListner{ …… private String m_clientId ; private InventoryNotifier m_notifier; public InventoryBean(){ m_notifier = InventoryNotifier.getInstance(); if(m_clientId == null) { m_clientId = "bookstore"; m_notifier.register(m_clientId, this); } } public void categoryChanged() { refresh(); //code for refresh dynamic part via ajax } …… } |
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