Hector为super cf的子列做incrementCounter

时间:2011-10-24 03:40:11

标签: cassandra hector

目前,mutator似乎只适用于标准cf.还有其他方法可以在super cf的子列上执行incrementCounter吗?

1 个答案:

答案 0 :(得分:4)

增加superColumn的计数器的一小段代码

SuperColumns包含字符串键,超名和名称......

String key = "keyOfRow"; 
    String superColumnFamily = "foo"; 
    String superColumnName ="bar"; 
    StringSerializer ss = StringSerializer.get(); 
    // let's insert a couple of counter columns in a superColumn 
    String columnName1="aaa"; 
    String columnName2="bbb"; 
    List <HCounterColumn<String>> myCounters = new 
ArrayList<HCounterColumn<String>>(); 
    myCounters.add(HFactory.createCounterColumn(columnName1, 1L)); 
    myCounters.add(HFactory.createCounterColumn(columnName2, 42L)); 
    Mutator mutator = HFactory.createMutator(keyspace, 
StringSerializer.get()); 
    mutator.insertCounter(key,superColumnFamily , 
HFactory.createCounterSuperColumn(superColumnName, myCounters, ss, 
ss)); 
mutator.execute();