Struct CloudWatchCoutMessageFormatter 

pub struct CloudWatchCoutMessageFormatter {}

A MessageFormatter that serializes log messages into a single-line JSON format.

This formatter is specifically designed for AWS CloudWatch Logs when running in environments like AWS Lambda, ECS, or Fargate, where stdout is automatically captured and ingested as structured logs.

Output Format

{"level":"INFO","msg":"Your log message here"}

Implementations

impl CloudWatchCoutMessageFormatter

pub fn new() -> Self

Creates a new instance of CloudWatchCoutMessageFormatter.

Trait Implementations

impl Default for CloudWatchCoutMessageFormatter

fn default() -> CloudWatchCoutMessageFormatter

Returns the “default value” for a type.

impl MessageFormatter for CloudWatchCoutMessageFormatter

fn format_io( &mut self, message: &Message, write: &mut (dyn Write + Send + Sync), ) -> Result<(), ServiceError>

Formats the Message as a JSON string and writes it to an IO stream.

Errors

Returns ServiceError::Io if writing to the stream fails.

fn format_fmt( &mut self, message: &Message, write: &mut (dyn Write + Send + Sync), ) -> Result<(), ServiceError>

Formats the Message as a JSON string and writes it to a core fmt formatter.