if((keybytes = getKeyBytes(key)) == null)
throw new IllegalArgumentException ("invalid key => ["+key+"]");
Double resvalue = null;
try {
BulkResponse bulkResponse = (BulkResponse) this.serviceRequest(Command.ZSCORE, keybytes, member);
if (bulkResponse.getBulkData() != null)
resvalue = Convert.toDouble(bulkResponse.getBulkData());
}
catch (ClassCastException e){
throw new ProviderException("Expecting a BulkResponse here => " + e.getLocalizedMessage(), e);
}
return resvalue;