Enum Kind 

#[non_exhaustive]
pub enum Kind {
    Client,
    Server,
    Producer,
    Consumer,
}

The “kind” of a span.

This has an impact on the relationship between the span’s timestamp, duration, and local endpoint.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Client

The client side of an RPC.

• Timestamp - The moment a request was sent (formerly “cs”)
• Duration - When present, indicates when a response was received (formerly “cr”)
• Remote Endpoint - Represents the server.

Server

The server side of an RPC.

• Timestamp - The moment a request was received (formerly “sr”)
• Duration - When present, indicates when a response was received (formerly “ss”)
• Remote Endpoint - Represents the client.

Producer

A message sent to a message broker.

• Timestamp - The moment a message was sent to a destination (formerly “ms”)
• Duration - When present, represents the delay sending the message, such as batching.
• Remote Endpoint - Represents the broker.

Consumer

A message received from a message broker.

• Timestamp - The moment a message was received from an origin (formerly “mr”)
• Duration - When present, represents the delay consuming the message, such as from a backlog.
• Remote Endpoint - Represents the broker.

Trait Implementations

impl Clone for Kind

fn clone(&self) -> Kind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Kind

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

Formats the value using the given formatter.

impl Copy for Kind