Struct MigrationOpTracker

pub struct MigrationOpTracker { /* private fields */ }

A MigrationOpTracker is responsible for managing the collection of measurements that a user might wish to record throughout a migration-assisted operation.

Example measurements include latency, errors, and consistency.

Implementations

impl MigrationOpTracker

pub fn operation(&mut self, operation: Operation)

Sets the migration related operation associated with these tracking measurements.

pub fn invoked(&mut self, origin: Origin)

Allows recording which origins were called during a migration.

pub fn consistent(&mut self, is_consistent: impl Fn() -> bool)

This method accepts a callable which should take no parameters and return a single boolean to represent the consistency check results for a read operation.

A callable is provided in case sampling rules do not require consistency checking to run. In this case, we can avoid the overhead of a function by not using the callable.

pub fn error(&mut self, origin: Origin)

Allows recording which origins were called during a migration.

pub fn latency(&mut self, origin: Origin, latency: Duration)

Allows tracking the recorded latency for an individual operation.

pub fn build(&self) -> Result<MigrationOpEvent, String>

Creates an instance of crate::MigrationOpEvent. This event data can be provided to the crate::Client::track_migration_op method to rely this metric information upstream to LaunchDarkly services.