How to insert value into Column Family using java/astyanax?

Question

[SOLVED] -

I am not sure why, but removing the

m.withRow(CF_test, "acct1234")
   .incrementCounterColumn("loginCount", 1); 

part of my code made it work. Alternatively, if someone could explain why it does so, that would be appreciated. Thank you!

---

I've been having trouble with Astyanax for Cassandra-cli. I couldn't really figure out much from the Netflix Github site, so I was looking to ask people with more firsthand experience.

How would I go about inserting rows into a Column Family that I have already created in Cassandra? Currently, my code looks like this:

// Inserting data
MutationBatch m = keyspace.prepareMutationBatch();


//Initialize Column family
ColumnFamily<String, String> CF_test =
new ColumnFamily<String, String>(
"users",              // Column Family Name
StringSerializer.get(),   // Key Serializer
StringSerializer.get());  // Column Serializer


m.withRow(CF_test, "default")
  .putColumn("full_name", "john", null)
  .putColumn("email", "smith", null)
  .putColumn("state", "555 Elm St", null)
  .putColumn("gender", "Male", null)
  .putColumn("birth_year", 30, null);

m.withRow(CF_test, "acct1234")
  .incrementCounterColumn("loginCount", 1);


  OperationResult<Void> result = m.execute();

However, it gives me the following error:

Exception in thread "main" com.netflix.astyanax.connectionpool.exceptions.BadRequestException: BadRequestException: [host=127.0.0.1(127.0.0.1):9160, latency=55(55), attempts=1]InvalidRequestException(why:invalid operation for non commutative columnfamily users)
at com.netflix.astyanax.thrift.ThriftConverter.ToConnectionPoolException(ThriftConverter.java:159)
at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:65)
at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:28)
at com.netflix.astyanax.thrift.ThriftSyncConnectionFactoryImpl$ThriftConnection.execute(ThriftSyncConnectionFactoryImpl.java:151)
at com.netflix.astyanax.connectionpool.impl.AbstractExecuteWithFailoverImpl.tryOperation(AbstractExecuteWithFailoverImpl.java:69)
at com.netflix.astyanax.connectionpool.impl.AbstractHostPartitionConnectionPool.executeWithFailover(AbstractHostPartitionConnectionPool.java:256)
at com.netflix.astyanax.thrift.ThriftKeyspaceImpl.executeOperation(ThriftKeyspaceImpl.java:485)
at com.netflix.astyanax.thrift.ThriftKeyspaceImpl.access$000(ThriftKeyspaceImpl.java:79)
at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$1.execute(ThriftKeyspaceImpl.java:123)
at Test1.main(Test1.java:76)

Caused by: InvalidRequestException(why:invalid operation for non commutative columnfamily users)
at org.apache.cassandra.thrift.Cassandra$batch_mutate_result.read(Cassandra.java:20833)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(Cassandra.java:964)
at org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(Cassandra.java:950)
at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$1$1.internalExecute(ThriftKeyspaceImpl.java:129)
at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$1$1.internalExecute(ThriftKeyspaceImpl.java:126)
at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:60)
... 8 more

Creating keyspaces worked, now I'm just unable to get column families changed.

Answer 1

To use

m.withRow(CF_test, "acct1234").incrementCounterColumn("loginCount", 1);

(counters),

you have to define a column family (or super column family) whose columns will act as counters.

Default validation class must be set to CounterColumnType .

CounterColumnType may only be set in the default_validation_class. A column family either contains only counters, or no counters at all.

Take a look at this page that refers to this page .

Answer 2

I am not sure why, but removing the

m.withRow(CF_test, "acct1234")
   .incrementCounterColumn("loginCount", 1); 

part of my code made it work. Alternatively, if someone could explain why it does so, that would be appreciated. Thank you!