module tarantool.mesh_connection

This module provides API for interaction with Tarantool servers cluster.

class tarantool.mesh_connection.MeshConnection(host=None, port=None, user=None, password=None, socket_timeout=None, reconnect_max_attempts=10, reconnect_delay=0.1, connect_now=True, encoding='utf-8', call_16=False, connection_timeout=None, transport='', ssl_key_file=None, ssl_cert_file=None, ssl_ca_file=None, ssl_ciphers=None, ssl_password=None, ssl_password_file=None, auth_type=None, addrs=None, strategy_class=<class 'tarantool.mesh_connection.RoundRobinStrategy'>, cluster_discovery_function=None, cluster_discovery_delay=60)

Represents a connection to a cluster of Tarantool servers.

Parameters
  • host – Refer to host. Value would be used to add one more server in addrs list.

  • port – Refer to host. Value would be used to add one more server in addrs list.

  • user – Refer to user. Value would be used to add one more server in addrs list.

  • password – Refer to password. Value would be used to add one more server in addrs list.

  • socket_timeout – Refer to socket_timeout. Value would be used for the current active connection.

  • reconnect_max_attempts – Refer to reconnect_max_attempts. Value would be used for the current active connection.

  • reconnect_delay – Refer to reconnect_delay. Value would be used for the current active connection.

  • connect_now (bool, optional) – If True, connect to server on initialization. Otherwise, you have to call connect() manually after initialization.

  • encoding – Refer to encoding. Value would be used for the current active connection.

  • call_16 – Refer to call_16. Value would be used for the current active connection.

  • connection_timeout – Refer to connection_timeout. Value would be used for the current active connection.

  • transport – Refer to transport. Value would be used to add one more server in addrs list.

  • ssl_key_file – Refer to ssl_key_file. Value would be used to add one more server in addrs list.

  • ssl_cert_file – Refer to ssl_cert_file. Value would be used to add one more server in addrs list.

  • ssl_ca_file – Refer to ssl_ca_file. Value would be used to add one more server in addrs list.

  • ssl_ciphers – Refer to ssl_ciphers. Value would be used to add one more server in addrs list.

  • auth_type – Refer to auth_type. Value would be used to add one more server in addrs list.

  • addrs – Cluster servers addresses list. Refer to addrs.

  • strategy_class (object, optional) – Strategy for choosing a server after the current server fails. Defaults to the round-robin strategy.

  • cluster_discovery_function (str or None, optional) –

    sets the name of the stored Lua function used to refresh the list of available nodes. The function takes no parameters and returns a list of strings in the format 'host:port'. A generic function for getting the list of nodes looks like this:

    function get_cluster_nodes()
        return {
            '192.168.0.1:3301',
            '192.168.0.2:3302?transport=ssl&ssl_ca_file=/path/to/ca.cert',
            -- ...
        }
    end
    

    You can put in this list whatever you need, depending on your cluster topology. Chances are you’ll want to derive the list of nodes from the nodes’ replication configuration. Here is an example:

    local uri_lib = require('uri')
    
    function get_cluster_nodes()
        local nodes = {}
    
        local replicas = box.cfg.replication
    
        for i = 1, #replicas do
            local uri = uri_lib.parse(replicas[i])
    
            if uri.host and uri.service then
                table.insert(nodes, uri.host .. ':' .. uri.service)
            end
        end
    
        -- if your replication config doesn't contain the current node,
        -- you have to add it manually like this:
        table.insert(nodes, '192.168.0.1:3301')
    
        return nodes
    end
    

  • cluster_discovery_delay (float, optional) – Minimal time between address list refresh.

Raises

ConfigurationError, Connection exceptions, connect exceptions

Error = <class 'tarantool.error.Error'>

DBAPI compatibility.

Value

Error

DatabaseError = <class 'tarantool.error.DatabaseError'>

DBAPI compatibility.

Value

DatabaseError

InterfaceError = <class 'tarantool.error.InterfaceError'>

DBAPI compatibility.

Value

InterfaceError

ConfigurationError = <class 'tarantool.error.ConfigurationError'>

DBAPI compatibility.

Value

ConfigurationError

SchemaError = <class 'tarantool.error.SchemaError'>

DBAPI compatibility.

Value

SchemaError

NetworkError = <class 'tarantool.error.NetworkError'>

DBAPI compatibility.

Value

NetworkError

Warning = <class 'tarantool.error.Warning'>

DBAPI compatibility.

Value

Warning

DataError = <class 'tarantool.error.DataError'>

DBAPI compatibility.

Value

DataError

OperationalError = <class 'tarantool.error.OperationalError'>

DBAPI compatibility.

Value

OperationalError

IntegrityError = <class 'tarantool.error.IntegrityError'>

DBAPI compatibility.

Value

IntegrityError

InternalError = <class 'tarantool.error.InternalError'>

DBAPI compatibility.

Value

InternalError

ProgrammingError = <class 'tarantool.error.ProgrammingError'>

DBAPI compatibility.

Value

ProgrammingError

NotSupportedError = <class 'tarantool.error.NotSupportedError'>

DBAPI compatibility.

Value

NotSupportedError

exception CrudModuleError(_, error)

Exception raised for errors that are related to the operation result of crud module.

Sets fields with result and errors.

Parameters

args (tuple) – The tuple from the crud module with result and errors.

with_traceback()

Exception.with_traceback(tb) – set self.__traceback__ to tb and return self.

authenticate(user, password)

Execute an AUTHENTICATE request: authenticate a connection. There is no need to call this method explicitly until you want to reauthenticate with different parameters.

Parameters
  • user (str) – User to authenticate.

  • password (str) – Password for the user.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

call(func_name, *args, on_push=None, on_push_ctx=None)

Execute a CALL request: call a stored Lua function.

Parameters
  • func_name (str) – Stored Lua function name.

  • args (tuple) – Stored Lua function arguments.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, SchemaError, NetworkError, SslError

close()

Close a connection to the server. The method is idempotent.

connect()

Create a connection to some server in the cluster. Refresh addresses info after success. There is no need to call this method explicitly until you have set connect_now=False on initialization.

Raise

AssertionError, SchemaError, NetworkError, connect exceptions

crud_count(space_name: str, conditions: list = [], opts: dict = {}) int

Gets rows count through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • conditions (list, optional) – The conditions for the crud module.

  • opts (dict, optional) – The opts for the crud module.

Return type

int

Raise

CrudModuleError, DatabaseError

crud_delete(space_name: str, key: int, opts: dict = {}) CrudResult

Deletes row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • key (int) – The primary key value.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_get(space_name: str, key: int, opts: dict = {}) CrudResult

Gets row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • key (int) – The primary key value.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_insert(space_name: str, values: Union[tuple, list], opts: dict = {}) CrudResult

Inserts row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_insert_many(space_name: str, values: Union[tuple, list], opts: dict = {}) CrudResult

Inserts batch rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_insert_object(space_name: str, values: dict, opts: dict = {}) CrudResult

Inserts object row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (dict) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_insert_object_many(space_name: str, values: Union[tuple, list], opts: dict = {}) CrudResult

Inserts batch object rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_len(space_name: str, opts: dict = {}) int

Gets the number of tuples in the space through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • opts (dict, optional) – The opts for the crud module.

Return type

int

Raise

CrudModuleError, DatabaseError

crud_max(space_name: str, index_name: str, opts: dict = {}) CrudResult

Gets rows with maximum value in the specified index through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • index_name (str) – The name of the index.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_min(space_name: str, index_name: str, opts: dict = {}) CrudResult

Gets rows with minimum value in the specified index through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • index_name (str) – The name of the index.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_replace(space_name: str, values: Union[tuple, list], opts: dict = {}) CrudResult

Replaces row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_replace_many(space_name: str, values: Union[tuple, list], opts: dict = {}) CrudResult

Replaces batch rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_replace_object(space_name: str, values: dict, opts: dict = {}) CrudResult

Replaces object row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (dict) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_replace_object_many(space_name: str, values: Union[tuple, list], opts: dict = {}) CrudResult

Replaces batch object rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_select(space_name: str, conditions: list = [], opts: dict = {}) CrudResult

Selects rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • conditions (list, optional) – The select conditions for the crud module.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, :exc:`~tarantool.error.DatabaseError`select

crud_stats(space_name: Optional[str] = None) CrudResult

Gets statistics from the crud.

Parameters

space_name (str, optional) – The name of the target space.

Return type

CrudResult

Raise

DatabaseError

crud_storage_info(opts: dict = {}) dict

Gets storages status through the crud.

Parameters

opts (dict, optional) – The opts for the crud module.

Return type

dict

Raise

CrudModuleError, DatabaseError

crud_truncate(space_name: str, opts: dict = {}) bool

Truncate rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • opts (dict, optional) – The opts for the crud module.

Return type

bool

Raise

CrudModuleError, DatabaseError

crud_unflatten_rows(rows: list, metadata: list) list

Makes rows unflatten through the crud.

Parameters
  • rows (list) – The rows to unflatten.

  • metadata (list) – The metadata to unflatten.

Return type

list

crud_update(space_name: str, key: int, operations: list = [], opts: dict = {}) CrudResult

Updates row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • key (int) – The primary key value.

  • operations (list, optional) – The update operations for the crud module.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_upsert(space_name: str, values: Union[tuple, list], operations: list = [], opts: dict = {}) CrudResult

Upserts row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (tuple or list) – Tuple to be inserted.

  • operations (list, optional) – The update operations for the crud module.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_upsert_many(space_name: str, values_operation: Union[tuple, list], opts: dict = {}) CrudResult

Upserts batch rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values_operation (tuple or list) – The data with update operations.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_upsert_object(space_name: str, values: dict, operations: list = [], opts: dict = {}) CrudResult

Upserts object row through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values (dict) – Tuple to be inserted.

  • operations (list, optional) – The update operations for the crud module.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

crud_upsert_object_many(space_name: str, values_operation: Union[tuple, list], opts: dict = {}) CrudResult

Upserts batch object rows through the crud.

Parameters
  • space_name (str) – The name of the target space.

  • values_operation (tuple or list) – The data with update operations.

  • opts (dict, optional) – The opts for the crud module.

Return type

CrudResult

Raise

CrudModuleError, DatabaseError

delete(space_name, key, *, index=0, on_push=None, on_push_ctx=None)

Execute a DELETE request: delete a tuple in the space.

Parameters
  • space_name (str or int) – Space name or space id.

  • key – Key of a tuple to be deleted.

  • index (str or int, optional) – Index name or index id. If you’re using a secondary index, it must be unique. Defaults to primary index.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

eval(expr, *args, on_push=None, on_push_ctx=None)

Execute an EVAL request: evaluate a Lua expression.

Parameters
  • expr (str) – Lua expression.

  • args (tuple) – Lua expression arguments.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

execute(query, params=None)

Execute an SQL request: see documentation for syntax reference.

The Tarantool binary protocol for SQL requests supports “qmark” and “named” param styles. A sequence of values can be used for “qmark” style. A mapping is used for “named” param style without the leading colon in the keys.

Example for “qmark” arguments:

args = ['email@example.com']
c.execute('select * from "users" where "email"=?', args)

Example for “named” arguments:

args = {'email': 'email@example.com'}
c.execute('select * from "users" where "email"=:email', args)
Parameters
  • query (str) – SQL query.

  • params (dict or list or None, optional) – SQL query bind values.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

flush_schema()

Reload space and index schema.

Raise

SchemaError, DatabaseError

insert(space_name, values, on_push=None, on_push_ctx=None)

Execute an INSERT request: insert a tuple to the space. Throws an error if there is already a tuple with the same primary key.

Parameters
  • space_name (str or int) – Space name or space id.

  • values (tuple or list) – Record to be inserted.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

is_closed()

Returns True if connection is closed. False otherwise.

Return type

bool

join(server_uuid)

Execute a JOIN request: join a replicaset.

Parameters

server_uuid (str) – UUID of connector “server”.

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

ping(notime=False)

Execute a PING request: send an empty request and receive an empty response from the server.

Parameters

notime (bool, optional) – If False, returns response time. Otherwise, it returns 'Success'.

Returns

Response time or 'Success'.

Return type

float or str

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

replace(space_name, values, on_push=None, on_push_ctx=None)

Execute a REPLACE request: replace a tuple in the space. Doesn’t throw an error if there is no tuple with the specified primary key.

Parameters
  • space_name (str or int) – Space name or space id.

  • values (tuple or list) – Tuple to be replaced.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

select(space_name, key=None, *, offset=0, limit=4294967295, index=0, iterator=None, on_push=None, on_push_ctx=None)

Execute a SELECT request: select a tuple from the space.

Parameters
  • space_name (str or int) – Space name or space id.

  • key (optional) – Key of a tuple to be selected.

  • offset (int, optional) – Number of tuples to skip.

  • limit (str or int, optional) – Maximum number of tuples to select.

  • index – Index name or index id to select. Defaults to primary index.

  • iterator

    Index iterator type.

    Iterator types for TREE indexes:

    Iterator type

    Arguments

    Description

    'EQ'

    search value

    The comparison operator is ‘==’ (equal to). If an index key is equal to a search value, it matches. Tuples are returned in ascending order by index key. This is the default.

    'REQ'

    search value

    Matching is the same as for 'EQ'. Tuples are returned in descending order by index key.

    'GT'

    search value

    The comparison operator is ‘>’ (greater than). If an index key is greater than a search value, it matches. Tuples are returned in ascending order by index key.

    'GE'

    search value

    The comparison operator is ‘>=’ (greater than or equal to). If an index key is greater than or equal to a search value, it matches. Tuples are returned in ascending order by index key.

    'ALL'

    search value

    Same as 'GE'

    'LT'

    search value

    The comparison operator is ‘<’ (less than). If an index key is less than a search value, it matches. Tuples are returned in descending order by index key.

    'LE'

    search value

    The comparison operator is ‘<=’ (less than or equal to). If an index key is less than or equal to a search value, it matches. Tuples are returned in descending order by index key.

    Iterator types for HASH indexes:

    Type

    Arguments

    Description

    'ALL'

    none

    All index keys match. Tuples are returned in ascending order by hash of index key, which will appear to be random.

    'EQ'

    search value

    The comparison operator is ‘==’ (equal to). If an index key is equal to a search value, it matches. The number of returned tuples will be 0 or 1. This is the default.

    'GT'

    search value

    The comparison operator is ‘>’ (greater than). If a hash of an index key is greater than a hash of a search value, it matches. Tuples are returned in ascending order by hash of index key, which will appear to be random. Provided that the space is not being updated, one can retrieve all the tuples in a space, N tuples at a time, by using iterator='GT',limit=N in each search, and using the last returned value from the previous result as the start search value for the next search.

    Iterator types for BITSET indexes:

    Type

    Arguments

    Description

    'ALL'

    none

    All index keys match. Tuples are returned in their order within the space.

    'EQ'

    bitset value

    If an index key is equal to a bitset value, it matches. Tuples are returned in their order within the space. This is the default.

    'BITS_ALL_SET'

    bitset value

    If all of the bits which are 1 in the bitset value are 1 in the index key, it matches. Tuples are returned in their order within the space.

    'BITS_ANY_SET'

    bitset value

    If any of the bits which are 1 in the bitset value are 1 in the index key, it matches. Tuples are returned in their order within the space.

    'BITS_ALL_NOT_SET'

    bitset value

    If all of the bits which are 1 in the bitset value are 0 in the index key, it matches. Tuples are returned in their order within the space.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

space(space_name)

Create a Space instance for a particular space.

Parameters

space_name (str or int) – Space name or space id.

Return type

Space

Raise

SchemaError

subscribe(cluster_uuid, server_uuid, vclock=None)

Execute a SUBSCRIBE request: subscribe to a replicaset updates. Connection is closed after subscribing.

Parameters
  • cluster_uuid (str) – UUID of replicaset cluster.

  • server_uuid (str) – UUID of connector “server”.

  • vclock (dict or None, optional) – Connector “server” vclock.

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

update(space_name, key, op_list, *, index=0, on_push=None, on_push_ctx=None)

Execute an UPDATE request: update a tuple in the space.

Parameters
  • space_name (str or int) – Space name or space id.

  • key – Key of a tuple to be updated.

  • op_list (tuple or list) –

    The list of operations to update individual fields. Each operation is a tuple of three (or more) values: (operator, field_identifier, value).

    Possible operators are:

    • '+' for addition. values must be numeric

    • '-' for subtraction. values must be numeric

    • '&' for bitwise AND. values must be unsigned numeric

    • '|' for bitwise OR. values must be unsigned numeric

    • '^' for bitwise XOR. values must be unsigned numeric

    • ':' for string splice. you must provide offset, count, and value for this operation

    • '!' for insertion. provide any element to insert)

    • '=' for assignment. (provide any element to assign)

    • '#' for deletion. provide count of fields to delete)

    Possible field_identifiers are:

    • Positive field number. The first field is 1, the second field is 2, and so on.

    • Negative field number. The last field is -1, the second-last field is -2, and so on. In other words: (#tuple + negative field number + 1).

    • Name. If the space was formatted with space_object:format(), then this can be a string for the field name (Since Tarantool 2.3.1).

    Operation examples:

    # 'ADD' 55 to the second field
    # Assign 'x' to the third field
    [('+', 2, 55), ('=', 3, 'x')]
    # 'OR' the third field with '1'
    # Cut three symbols, starting from the second,
    # and replace them with '!!'
    # Insert 'hello, world' field before the fifth element of the tuple
    [('|', 3, 1), (':', 2, 2, 3, '!!'), ('!', 5, 'hello, world')]
    # Delete two fields, starting with the second field
    [('#', 2, 2)]
    

  • index (str or int, optional) – Index name or index id. If you’re using a secondary index, it must be unique. Defaults to primary index.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

upsert(space_name, tuple_value, op_list, *, index=0, on_push=None, on_push_ctx=None)

Execute an UPSERT request: upsert a tuple to the space.

If an existing tuple matches the key fields of tuple_value, then the request has the same effect as UPDATE and the [(field_1, symbol_1, arg_1), ...] parameter is used.

If there is no tuple matching the key fields of tuple_value, then the request has the same effect as INSERT and the tuple_value parameter is used. However, unlike insert or update, upsert will neither read the tuple nor perform error checks before returning – this is a design feature which enhances throughput but requires more caution on the part of the user.

Parameters
  • space_name (str or int) – Space name or space id.

  • tuple_value (tuple or list) – Tuple to be upserted.

  • op_list (tuple or list) – Refer to update() op_list.

  • index (str or int, optional) – Index name or index id. If you’re using a secondary index, it must be unique. Defaults to primary index.

  • on_push (function, optional) – Сallback for processing out-of-band messages.

  • on_push_ctx (optional) – Сontext for working with on_push callback.

Return type

Response

Raise

AssertionError, DatabaseError, SchemaError, NetworkError, SslError

class tarantool.mesh_connection.RoundRobinStrategy(addrs)

Defines strategy to choose next pool server after fail.

Parameters

addrs (list of dict) – Server addresses list, refer to addrs.

getnext()

Get next cluster server.

Returns

Server address.

Return type

dict

update(new_addrs)

Refresh the strategy state with new addresses.

Parameters

new_addrs – Updated server addresses list.

tarantool.mesh_connection.parse_uri(uri)

Parse URI received from cluster discovery function.

Parameters

uri (str) – URI received from cluster discovery function

Returns

First value: {“host”: host, “port”: port} or None in case of fail, second value: None or error message in case of fail.

Return type

first value: dict or None, second value: None or str

tarantool.mesh_connection.prepare_address(address)

Validate address dictionary, fill with default values. For format refer to addrs.

Parameters

address (dict) – Address dictionary.

Returns

Address dictionary or None in case of failure, second value: None or error message in case of failure.

Return type

first value: dict or None, second value: None or str

tarantool.mesh_connection.update_connection(conn, address)

Update connection info after rotation.

Parameters