Struct WorkflowCheckpoint

pub struct WorkflowCheckpoint {
    pub code_version: i32,
    pub tasks: HashMap<String, Task>,
    pub settings: HashMap<String, String>,
}

Fields

code_version: i32

code_version is used to detect incompabilities between the version of the running workflow and the one which wrote the checkpoint. If they don’t match, the workflow must not continue. The author of workflow must update this variable in their implementation when incompabilities are introduced.

tasks stores all tasks of the workflow in a map. The key is a unique name to identify the task, e.g. clone/-80.

tasks: HashMap<String, Task>

Task is the data structure that stores the execution status and the attributes of a task.

settings: HashMap<String, String>

settings includes workflow specific data, e.g. the resharding workflow would store the source shards and destination shards.

Trait Implementations

impl Clone for WorkflowCheckpoint

fn clone(&self) -> WorkflowCheckpoint

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WorkflowCheckpoint

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

Formats the value using the given formatter.

impl Default for WorkflowCheckpoint

fn default() -> Self

Returns the “default value” for a type.

impl Message for WorkflowCheckpoint

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 WorkflowCheckpoint

fn eq(&self, other: &WorkflowCheckpoint) -> 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 WorkflowCheckpoint