Struct BaseCallbackManager 

pub struct BaseCallbackManager {
    pub handlers: Vec<Arc<dyn BaseCallbackHandler>>,
    pub inheritable_handlers: Vec<Arc<dyn BaseCallbackHandler>>,
    pub parent_run_id: Option<Uuid>,
    pub tags: Vec<String>,
    pub inheritable_tags: Vec<String>,
    pub metadata: HashMap<String, Value>,
    pub inheritable_metadata: HashMap<String, Value>,
}

Base callback manager for LangChain.

Manages a collection of callback handlers and provides methods to add, remove, and configure handlers.

Fields

handlers: Vec<Arc<dyn BaseCallbackHandler>>

The handlers.

inheritable_handlers: Vec<Arc<dyn BaseCallbackHandler>>

The inheritable handlers.

parent_run_id: Option<Uuid>

The parent run ID.

tags: Vec<String>

The tags.

inheritable_tags: Vec<String>

The inheritable tags.

metadata: HashMap<String, Value>

The metadata.

inheritable_metadata: HashMap<String, Value>

The inheritable metadata.

Implementations

impl BaseCallbackManager

pub fn new() -> Self

Create a new callback manager.

pub fn with_handlers( handlers: Vec<Arc<dyn BaseCallbackHandler>>, inheritable_handlers: Option<Vec<Arc<dyn BaseCallbackHandler>>>, parent_run_id: Option<Uuid>, tags: Option<Vec<String>>, inheritable_tags: Option<Vec<String>>, metadata: Option<HashMap<String, Value>>, inheritable_metadata: Option<HashMap<String, Value>>, ) -> Self

Create a new callback manager with handlers.

This matches the Python __init__ signature.

pub fn copy(&self) -> Self

Return a copy of the callback manager.

pub fn merge(&self, other: &BaseCallbackManager) -> Self

Merge with another callback manager.

Note: This matches Python’s behavior which does NOT merge inheritable_metadata (this appears to be a bug in the Python implementation, but we match it for compatibility).

pub fn is_async(&self) -> bool

Whether the callback manager is async.

pub fn add_handler( &mut self, handler: Arc<dyn BaseCallbackHandler>, inherit: bool, )

Add a handler to the callback manager.

pub fn remove_handler(&mut self, handler: &Arc<dyn BaseCallbackHandler>)

Remove a handler from the callback manager.

pub fn set_handlers( &mut self, handlers: Vec<Arc<dyn BaseCallbackHandler>>, inherit: bool, )

Set handlers as the only handlers on the callback manager.

pub fn set_handler( &mut self, handler: Arc<dyn BaseCallbackHandler>, inherit: bool, )

Set a single handler as the only handler on the callback manager.

pub fn add_tags(&mut self, tags: Vec<String>, inherit: bool)

Add tags to the callback manager.

pub fn remove_tags(&mut self, tags: Vec<String>)

Remove tags from the callback manager.

pub fn add_metadata(&mut self, metadata: HashMap<String, Value>, inherit: bool)

Add metadata to the callback manager.

pub fn remove_metadata(&mut self, keys: Vec<String>)

Remove metadata from the callback manager.

Trait Implementations

impl Clone for BaseCallbackManager

fn clone(&self) -> BaseCallbackManager

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BaseCallbackManager

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

Formats the value using the given formatter.

impl Default for BaseCallbackManager

fn default() -> Self

Returns the “default value” for a type.

impl From<BaseCallbackManager> for Callbacks

fn from(manager: BaseCallbackManager) -> Self

Converts to this type from the input type.