if(!message.containsKey(COLLECTION)) {
throw new Exception(MISSING_COLLECTION_PARAM);
}
Collection col = getCollection( (String) message.get(COLLECTION) );
String[] list = col.listDocuments();
Vector docs = new Vector();
for ( int i = 0; ( list != null ) && ( i < list.length ); i++ ) {
docs.addElement( list[i] );
}