cassandra - Hector 为 super cf 的子列做 incrementCounter

Question

目前，mutator 似乎只适用于标准 cf。是否有任何其他方法可以在超级 cf 的子列上执行 incrementCounter？

Answer 1

一小段代码来增加 superColumn 的计数器

使用带有字符串键、超名和名称的 SuperColumns...

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();