mariadb/storage/cassandra/cassandra_se.h

/*
  This file is a "bridge" interface between cassandra+Thrift and MariaDB.

  It is #included by both sides, so it must itself include neither (including
  both together causes compile errors due to conflicts).
*/


/*
  Interface to one cassandra column family, i.e. one 'table'
*/
class Cassandra_se_interface
{
public:
  Cassandra_se_interface() { err_buffer[0]=0; }
  
  virtual ~Cassandra_se_interface(){};
  /* Init */
  virtual bool connect(const char *host, const char *port)=0;
  virtual void set_column_family(const char *cfname) = 0;
   
  /* Check underlying DDL */
  virtual bool setup_ddl_checks()=0;
  virtual void first_ddl_column()=0;
  virtual bool next_ddl_column(char **name, int *name_len, char **value, 
                               int *value_len)=0;
  virtual void get_rowkey_type(char **name, char **type)=0;

  /* Writes */
  virtual void start_prepare_insert(const char *key, int key_len)=0;
  virtual void add_insert_column(const char *name, const char *value, 
                                 int value_len)=0;
  virtual bool do_insert()=0;

  /* Reads */
  virtual bool get_slice(char *key, size_t key_len, bool *found)=0 ;
  virtual bool get_next_read_column(char **name, char **value, int *value_len)=0;
  virtual void get_read_rowkey(char **value, int *value_len)=0;

  /* Reads, multi-row scans */
  virtual bool get_range_slices()=0;
  virtual void finish_reading_range_slices()=0;
  virtual bool get_next_range_slice_row()=0;
  
  /* read_set setup */
  virtual void clear_read_columns()=0;
  virtual void add_read_column(const char *name)=0;
  
  virtual bool truncate()=0;
  /* Passing error messages up to ha_cassandra */
  char err_buffer[512];
  const char *error_str() { return err_buffer; }
  void print_error(const char *format, ...);
};

Cassandra_se_interface *get_cassandra_se();