question: public boolean isConnected ( String hostAndPort ) throws ConnectionManagerException { connectionLock . lock ( ) ; boolean isConnected = false ; try { if ( ( hostAndPort == null ) || ( hostAndPort . length ( ) == 0 ) ) { throw new ConnectionManagerException ( "Passed host/port is null or blank." ) ; } CimConnection connection = _connections . get ( hostAndPort ) ; if ( connection != null ) { isConnected = true ; } } finally { connectionLock . unlock ( ) ; } return isConnected ; }
target:  Determines whether or not a connection has already been established for the passed host.