Struct PluginManager 

pub struct PluginManager { /* private fields */ }

Manages a collection of plugins and coordinates callback execution.

The PluginManager runs callbacks from all registered plugins in order. For callbacks that can modify data (like on_user_message), the first plugin to return a modification wins.

Example

use adk_plugin::{Plugin, PluginManager, PluginConfig};

let plugins = vec![
    Plugin::new(PluginConfig {
        name: "logging".to_string(),
        on_event: Some(log_events()),
        ..Default::default()
    }),
    Plugin::new(PluginConfig {
        name: "metrics".to_string(),
        before_run: Some(start_timer()),
        after_run: Some(stop_timer()),
        ..Default::default()
    }),
];

let manager = PluginManager::new(plugins);

Implementations

impl PluginManager

pub fn new(plugins: Vec<Plugin>) -> Self

Create a new plugin manager with the given plugins.

pub fn with_config(plugins: Vec<Plugin>, config: PluginManagerConfig) -> Self

Create a new plugin manager with custom configuration.

pub fn plugin_count(&self) -> usize

Get the number of registered plugins.

pub fn plugin_names(&self) -> Vec<&str>

Get plugin names.

pub async fn run_on_user_message( &self, ctx: Arc<dyn InvocationContext>, content: Content, ) -> Result<Option<Content>>

Run on_user_message callbacks from all plugins.

Returns the modified content if any plugin modified it.

pub async fn run_on_event( &self, ctx: Arc<dyn InvocationContext>, event: Event, ) -> Result<Option<Event>>

Run on_event callbacks from all plugins.

Returns the modified event if any plugin modified it.

pub async fn run_before_run( &self, ctx: Arc<dyn InvocationContext>, ) -> Result<Option<Content>>

Run before_run callbacks from all plugins.

If any plugin returns content, the run should be skipped.

pub async fn run_after_run(&self, ctx: Arc<dyn InvocationContext>)

Run after_run callbacks from all plugins.

This does NOT emit events - it’s for cleanup/metrics only.

pub async fn run_before_agent( &self, ctx: Arc<dyn CallbackContext>, ) -> Result<Option<Content>>

Run before_agent callbacks from all plugins.

If any plugin returns content, the agent run should be skipped.

pub async fn run_after_agent( &self, ctx: Arc<dyn CallbackContext>, ) -> Result<Option<Content>>

Run after_agent callbacks from all plugins.

pub async fn run_before_model( &self, ctx: Arc<dyn CallbackContext>, request: LlmRequest, ) -> Result<BeforeModelResult>

Run before_model callbacks from all plugins.

Callbacks can modify the request or skip the model call.

pub async fn run_after_model( &self, ctx: Arc<dyn CallbackContext>, response: LlmResponse, ) -> Result<Option<LlmResponse>>

Run after_model callbacks from all plugins.

pub async fn run_on_model_error( &self, ctx: Arc<dyn CallbackContext>, request: LlmRequest, error: String, ) -> Result<Option<LlmResponse>>

Run on_model_error callbacks from all plugins.

pub async fn run_before_tool( &self, ctx: Arc<dyn CallbackContext>, ) -> Result<Option<Content>>

Run before_tool callbacks from all plugins.

pub async fn run_after_tool( &self, ctx: Arc<dyn CallbackContext>, ) -> Result<Option<Content>>

Run after_tool callbacks from all plugins.

pub async fn run_on_tool_error( &self, ctx: Arc<dyn CallbackContext>, tool: Arc<dyn Tool>, args: Value, error: String, ) -> Result<Option<Value>>

Run on_tool_error callbacks from all plugins.

pub async fn close(&self)

Close all plugins with timeout.

Trait Implementations

impl Debug for PluginManager

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

Formats the value using the given formatter.