question: public void queue ( String entity , String event , String key ) { if ( broadcastEvents == null ) return ; try { counter . incrementAndGet ( ) ; broadcastEvents . putFirst ( new BroadcastEvent ( entity , event , key ) ) ; } catch ( Exception e ) { counter . decrementAndGet ( ) ; logger . error ( "error putting BroadcastEvent" , e ) ; } }
target:  Broadcast an event out