Struct BeginTransactionRequest 

#[non_exhaustive]
pub struct BeginTransactionRequest {
    pub session: String,
    pub options: Option<TransactionOptions>,
    pub request_options: Option<RequestOptions>,
    pub mutation_key: Option<Mutation>,
    pub routing_hint: Option<RoutingHint>,
    /* private fields */
}

The request for BeginTransaction.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

session: String

Required. The session in which the transaction runs.

options: Option<TransactionOptions>

Required. Options for the new transaction.

request_options: Option<RequestOptions>

Common options for this request. Priority is ignored for this request. Setting the priority in this request_options struct doesn’t do anything. To set the priority for a transaction, set it on the reads and writes that are part of this transaction instead.

mutation_key: Option<Mutation>

Optional. Required for read-write transactions on a multiplexed session that commit mutations but don’t perform any reads or queries. You must randomly select one of the mutations from the mutation set and send it as a part of this request.

routing_hint: Option<RoutingHint>

Optional. Makes the Spanner requests location-aware if present.

It gives the server hints that can be used to route the request to an appropriate server, potentially significantly decreasing latency and improving throughput. To achieve improved performance, most fields must be filled in with accurate values.

Implementations

impl BeginTransactionRequest

pub fn new() -> Self

Creates a new default instance.

pub fn set_session<T: Into<String>>(self, v: T) -> Self

Sets the value of session.

pub fn set_options<T>(self, v: T) -> Self

where T: Into<TransactionOptions>,

Sets the value of options.

pub fn set_or_clear_options<T>(self, v: Option<T>) -> Self

where T: Into<TransactionOptions>,

Sets or clears the value of options.

pub fn set_request_options<T>(self, v: T) -> Self

where T: Into<RequestOptions>,

Sets the value of request_options.

pub fn set_or_clear_request_options<T>(self, v: Option<T>) -> Self

where T: Into<RequestOptions>,

Sets or clears the value of request_options.

pub fn set_mutation_key<T>(self, v: T) -> Self

where T: Into<Mutation>,

Sets the value of mutation_key.

pub fn set_or_clear_mutation_key<T>(self, v: Option<T>) -> Self

where T: Into<Mutation>,

Sets or clears the value of mutation_key.

pub fn set_routing_hint<T>(self, v: T) -> Self

where T: Into<RoutingHint>,

Sets the value of routing_hint.

pub fn set_or_clear_routing_hint<T>(self, v: Option<T>) -> Self

where T: Into<RoutingHint>,

Sets or clears the value of routing_hint.

Trait Implementations

impl Clone for BeginTransactionRequest

fn clone(&self) -> BeginTransactionRequest

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BeginTransactionRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BeginTransactionRequest

fn default() -> BeginTransactionRequest

Returns the “default value” for a type.

impl Message for BeginTransactionRequest

fn typename() -> &'static str

The typename of this message.

impl PartialEq for BeginTransactionRequest

fn eq(&self, other: &BeginTransactionRequest) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for BeginTransactionRequest