thrift - Cassandra createSliceQuery clarification -

i'm trying retrieve columns of row in cassandra using thrift 1.0 lib. found examples googling , in particular:

slicequery<string, string, string> slicequery = hectortemplate.createslicequery(     stringserializer.get(), stringserializer.get(), stringserializer.get()); slicequery.setcolumnfamily("myname"); slicequery.setkey("myid"); slicequery.setrange(null, null, false, 20); queryresult<columnslice<string,string>> queryresult = slicequery.execute(); columnslice<string,string> slice = queryresult.get(); list<hcolumn<string, string>> retrievedcolumns = slice.getcolumns(); (hcolumn<string, string> column : retrievedcolumns) {     system.out.println(column.getname() +"::"+ column.getvalue()); } 

however, not find information on parameters , types in hector objects are??

for example, here:

slicequery<string, string, string>  

• all types here string - types of? column name type? column value types?

then, specify parameters createslicequery():

hectortemplate.createslicequery(     stringserializer.get(), stringserializer.get(), stringserializer.get()); 

again - serializers for? why there 3 serializers - if first , last column, , else? if many columns, how specify serializers them?

then, retrieve

list<hcolumn<string, string>>  

-- again, these string types for? if have column of type bytestype - specify that?

if there decent api docs (not method signatures no explanation of parameters are) - point me them?

thanks! marina

in case slicequery<k, c, v>, here type parameters:

k -- type of key

c -- type of column name

v -- type of column value

again in case of hcolumn<n,v>, type parameters are

n -- type of column name

v -- type of column value

similar case of createslicequery