Struct google_api_proto::google::bigtable::v2::read_change_stream_response::DataChange

pub struct DataChange {
    pub type: i32,
    pub source_cluster_id: String,
    pub row_key: Bytes,
    pub commit_timestamp: Option<Timestamp>,
    pub tiebreaker: i32,
    pub chunks: Vec<MutationChunk>,
    pub done: bool,
    pub token: String,
    pub estimated_low_watermark: Option<Timestamp>,
}

A message corresponding to one or more mutations to the partition being streamed. A single logical DataChange message may also be split across a sequence of multiple individual messages. Messages other than the first in a sequence will only have the type and chunks fields populated, with the final message in the sequence also containing done set to true.

Fields

type: i32

The type of the mutation.

source_cluster_id: String

The cluster where the mutation was applied. Not set when type is GARBAGE_COLLECTION.

row_key: Bytes

The row key for all mutations that are part of this DataChange. If the DataChange is chunked across multiple messages, then this field will only be set for the first message.

commit_timestamp: Option<Timestamp>

The timestamp at which the mutation was applied on the Bigtable server.

tiebreaker: i32

A value that lets stream consumers reconstruct Bigtable’s conflict resolution semantics. https://cloud.google.com/bigtable/docs/writes#conflict-resolution In the event that the same row key, column family, column qualifier, timestamp are modified on different clusters at the same commit_timestamp, the mutation with the larger tiebreaker will be the one chosen for the eventually consistent state of the system.

chunks: Vec<MutationChunk>

The mutations associated with this change to the partition. May contain complete mutations or chunks of a multi-message chunked DataChange record.

done: bool

When true, indicates that the entire DataChange has been read and the client can safely process the message.

token: String

An encoded position for this stream’s partition to restart reading from. This token is for the StreamPartition from the request.

estimated_low_watermark: Option<Timestamp>

An estimate of the commit timestamp that is usually lower than or equal to any timestamp for a record that will be delivered in the future on the stream. It is possible that, under particular circumstances that a future record has a timestamp is is lower than a previously seen timestamp. For an example usage see https://beam.apache.org/documentation/basics/#watermarks

Implementations

impl DataChange

pub fn type(&self) -> Type

Returns the enum value of type, or the default if the field is set to an invalid enum value.

pub fn set_type(&mut self, value: Type)

Sets type to the provided enum value.

Trait Implementations

impl Clone for DataChange

fn clone(&self) -> DataChange

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DataChange

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

Formats the value using the given formatter.

impl Default for DataChange

fn default() -> Self

Returns the “default value” for a type.

impl Message for DataChange

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for DataChange

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for DataChange