Astyanax中的Cassandra CQL3支持

Question

Astyanax是否通过带有CQL3的预准备语句支持"insert into“？我使用最新的Astyanax库1.56.24和Cassandra 1.2.1。当我尝试使用CQL3执行预准备语句时：

keyspace.prepareQuery(conn.CF_CONTACTS)
  .withCql("INSERT INTO contacts (a, b) VALUES (?, ?);")
  .asPreparedStatement()
  .withStringValue("123")
  .withStringValue("456")
  .execute();;

我得到了以下异常：

Caused by: InvalidRequestException(why:Cannot execute/prepare CQL2 statement since the CQL has been set to CQL3(This might mean your client hasn't been upgraded correctly to use the new CQL3 methods introduced in Cassandra 1.2+).)
at org.apache.cassandra.thrift.Cassandra$prepare_cql_query_result.read(Cassandra.java:38738)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at org.apache.cassandra.thrift.Cassandra$Client.recv_prepare_cql_query(Cassandra.java:1598)
at org.apache.cassandra.thrift.Cassandra$Client.prepare_cql_query(Cassandra.java:1584)
at com.netflix.astyanax.thrift.ThriftColumnFamilyQueryImpl$6$3$1.internalExecute(ThriftColumnFamilyQueryImpl.java:747)
at com.netflix.astyanax.thrift.ThriftColumnFamilyQueryImpl$6$3$1.internalExecute(ThriftColumnFamilyQueryImpl.java:742)
at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:56)

Answer 1

这是因为cassandra客户端中的更改将通知不正确使用CQL3实现的高级客户端应用程序。请参阅https://issues.apache.org/jira/browse/CASSANDRA-5172

看起来Astyanax要么没有升级到这个版本的cassandra客户端，要么他们没有记录我目前正在寻找解决方案。

Answer 2

我使用Astyanax 1.56.31实现了这一点。您需要在AstyanaxConfigurationImpl实例中设置以下内容：

.setTargetCassandraVersion("1.2")
.setCqlVersion("3.0.0")