cassandra/interface/cassandra.thrift

#!/usr/local/bin/thrift --java --php --py
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#     http://www.apache.org/licenses/LICENSE-2.0
#
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# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

#
# Interface definition for Cassandra Service
#

namespace java org.apache.cassandra.service
namespace cpp org.apache.cassandra
namespace csharp Apache.Cassandra
namespace py cassandra
namespace php cassandra
namespace perl Cassandra

# Thrift.rb has a bug where top-level modules that include modules 
# with the same name are not properly referenced, so we can't do
# Cassandra::Cassandra::Client.
namespace rb CassandraThrift

#
# data structures
#

struct Column {
   1: required binary name,
   2: required binary value,
   3: required i64 timestamp,
}

struct SuperColumn {
   1: required binary name,
   2: required list<Column> columns,
}

struct ColumnOrSuperColumn {
    1: optional Column column,
    2: optional SuperColumn super_column,
}


#
# Exceptions
#

# a specific column was requested that does not exist
exception NotFoundException {
}

# invalid request (keyspace / CF does not exist, etc.)
exception InvalidRequestException {
    1: required string why
}

# not all the replicas required could be created / read
exception UnavailableException {
}

# (note that internal server errors will raise a TApplicationException, courtesy of Thrift)


#
# service api
#

enum ConsistencyLevel {
    ZERO = 0,
    ONE = 1,
    QUORUM = 2,
    ALL = 3,
}

struct ColumnParent {
    3: required string column_family,
    4: optional binary super_column,
}

struct ColumnPath {
    3: required string column_family,
    4: optional binary super_column,
    5: optional binary column,
}

struct SliceRange {
    1: required binary start,
    2: required binary finish,
    3: required bool reversed=0,
    4: required i32 count=100,
}

struct SlicePredicate {
    1: optional list<binary> column_names,
    2: optional SliceRange   slice_range,
}


service Cassandra {
  # retrieval methods
  ColumnOrSuperColumn get(1:required string keyspace,
                          2:required string key,
                          3:required ColumnPath column_path,
                          4:required ConsistencyLevel consistency_level=1)
                      throws (1: InvalidRequestException ire, 2: NotFoundException nfe, 3: UnavailableException ue),

  list<ColumnOrSuperColumn> get_slice(1:required string keyspace, 
                                      2:required string key, 
                                      3:required ColumnParent column_parent, 
                                      4:required SlicePredicate predicate, 
                                      5:required ConsistencyLevel consistency_level=1)
                              throws (1: InvalidRequestException ire, 2: NotFoundException nfe, 3: UnavailableException ue),

  map<string,ColumnOrSuperColumn> multiget(1:required string keyspace, 
                                           2:required list<string> keys, 
                                           3:required ColumnPath column_path, 
                                           4:required ConsistencyLevel consistency_level=1)
                                    throws (1: InvalidRequestException ire, 2: UnavailableException ue),

  map<string,list<ColumnOrSuperColumn>> multiget_slice(1:required string keyspace, 
                                                       2:required list<string> keys, 
                                                       3:required ColumnParent column_parent, 
                                                       4:required SlicePredicate predicate, 
                                                       5:required ConsistencyLevel consistency_level=1)
                                          throws (1: InvalidRequestException ire, 2: UnavailableException ue),

  i32 get_count(1:required string keyspace, 
                2:required string key, 
                3:required ColumnParent column_parent, 
                4:required ConsistencyLevel consistency_level=1)
      throws (1: InvalidRequestException ire, 2: UnavailableException ue),

  # range query: returns matching keys
  list<string> get_key_range(1:required string keyspace, 
                             2:required string column_family, 
                             3:required string start="", 
                             4:required string finish="", 
                             5:required i32 count=100, 
                             6:required ConsistencyLevel consistency_level=1)
               throws (1: InvalidRequestException ire, 2: UnavailableException ue),

  # modification methods
  void insert(1:required string keyspace, 
              2:required string key, 
              3:required ColumnPath column_path, 
              4:required binary value, 
              5:required i64 timestamp, 
              6:required ConsistencyLevel consistency_level=0)
       throws (1: InvalidRequestException ire, 2: UnavailableException ue),

  void batch_insert(1:required string keyspace, 
                    2:required string key, 
                    3:required map<string, list<ColumnOrSuperColumn>> cfmap, 
                    4:required ConsistencyLevel consistency_level=0)
       throws (1: InvalidRequestException ire, 2: UnavailableException ue),

  void remove(1:required string keyspace,
              2:required string key, 
              3:required ColumnPath column_path,
              4:required i64 timestamp,
              5:ConsistencyLevel consistency_level=0)
       throws (1: InvalidRequestException ire, 2: UnavailableException ue),


  // Meta-APIs -- APIs to get information about the node or cluster,
  // rather than user data.  The nodeprobe program provides usage examples.

  // get property whose value is of type "string"
  string get_string_property(1:required string property),

  // get property whose value is list of "strings"
  list<string> get_string_list_property(1:required string property),

  // describe specified keyspace
  map<string, map<string, string>> describe_keyspace(1:required string keyspace)
                                   throws (1: NotFoundException nfe),
}