Observer Pattern: Event Notification System
Observer Pattern: Event Notification System
EasyLLD0% accepted
Implement Observer pattern for an event notification system. Stock price monitor notifies multiple subscribers (Logger, EmailAlert, SMSAlert) when price changes. Also discuss push vs pull observer variants.
Approach
Implement Observer pattern with multiple subscribers for event notification.
Input
StockMonitor has 3 observers; price changes from 100 to 120
Output
notifyObservers() calls update(120) on Logger, EmailAlert, SMSAlert; all three receive new price
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