rust_mcp_sdk::mcp_client

Trait ClientHandlerCore

Source 
pub trait ClientHandlerCore:
    Send
    + Sync
    + 'static {
    // Required methods
    fn handle_request<'life0, 'life1, 'async_trait>(
        &'life0 self,
        request: RequestFromServer,
        runtime: &'life1 dyn McpClient,
    ) -> Pin<Box<dyn Future<Output = Result<ResultFromClient, RpcError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn handle_notification<'life0, 'life1, 'async_trait>(
        &'life0 self,
        notification: NotificationFromServer,
        runtime: &'life1 dyn McpClient,
    ) -> Pin<Box<dyn Future<Output = Result<(), RpcError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn handle_error<'life0, 'life1, 'async_trait>(
        &'life0 self,
        error: RpcError,
        runtime: &'life1 dyn McpClient,
    ) -> Pin<Box<dyn Future<Output = Result<(), RpcError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;

    // Provided method
    fn handle_process_error<'life0, 'life1, 'async_trait>(
        &'life0 self,
        error_message: String,
        runtime: &'life1 dyn McpClient,
    ) -> Pin<Box<dyn Future<Output = Result<(), RpcError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
}
Expand description

Defines the ClientHandlerCore trait for handling Model Context Protocol (MCP) client operations. Unlike ClientHandler, this trait offers no default implementations, providing full control over MCP message handling while ensures type-safe processing of the messages through three distinct handlers for requests, notifications, and errors.

Required Methods§

Source

fn handle_request<'life0, 'life1, 'async_trait>( &'life0 self, request: RequestFromServer, runtime: &'life1 dyn McpClient, ) -> Pin<Box<dyn Future<Output = Result<ResultFromClient, RpcError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Asynchronously handles an incoming request from the server.

§Parameters
  • request – The request data received from the MCP server.
§Returns

A ResultFromClient, which represents the client’s response to the server’s request.

Source

fn handle_notification<'life0, 'life1, 'async_trait>( &'life0 self, notification: NotificationFromServer, runtime: &'life1 dyn McpClient, ) -> Pin<Box<dyn Future<Output = Result<(), RpcError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Asynchronously handles an incoming notification from the server.

§Parameters
  • notification – The notification data received from the MCP server.
Source

fn handle_error<'life0, 'life1, 'async_trait>( &'life0 self, error: RpcError, runtime: &'life1 dyn McpClient, ) -> Pin<Box<dyn Future<Output = Result<(), RpcError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Asynchronously handles an error received from the server.

§Parameters
  • error – The error data received from the MCP server.

Provided Methods§

Source

fn handle_process_error<'life0, 'life1, 'async_trait>( &'life0 self, error_message: String, runtime: &'life1 dyn McpClient, ) -> Pin<Box<dyn Future<Output = Result<(), RpcError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Implementors§