Struct ConsoleCallbackHandler

pub struct ConsoleCallbackHandler {
    pub verbose: bool,
    pub color: Option<String>,
}

A console callback handler that prints run information to stdout

Fields

verbose: bool

Whether to print detailed information

color: Option<String>

The color to use for text output (matching LangChain’s color scheme)

Implementations

impl ConsoleCallbackHandler

pub fn new() -> Self

Create a new console callback handler

pub fn new_with_verbose(verbose: bool) -> Self

Create a new console callback handler with verbosity setting

pub fn new_with_color(color: impl Into<String>) -> Self

Create a new console callback handler with color

pub fn new_with_verbose_and_color( verbose: bool, color: impl Into<String>, ) -> Self

Create a new console callback handler with verbosity and color

Trait Implementations

impl CallbackHandler for ConsoleCallbackHandler

fn on_run_start<'life0, 'life1, 'async_trait>( &'life0 self, run_info: &'life1 RunInfo, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Called when a run starts

fn on_run_success<'life0, 'life1, 'async_trait>( &'life0 self, run_info: &'life1 RunInfo, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Called when a run completes successfully

fn on_run_error<'life0, 'life1, 'async_trait>( &'life0 self, run_info: &'life1 RunInfo, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Called when a run fails

fn on_run_stream<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, _run_info: &'life1 RunInfo, chunk: &'life2 Value, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Called when a run produces streaming output

fn on_run_cancel<'life0, 'life1, 'async_trait>( &'life0 self, run_info: &'life1 RunInfo, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Called when a run is cancelled

impl Default for ConsoleCallbackHandler

fn default() -> Self

Returns the “default value” for a type.