Struct PromptManager 

pub struct PromptManager { /* private fields */ }

Manages prompt fetching, caching, and compilation.

Implementations

impl PromptManager

pub fn new(config: &LangfuseConfig) -> Self

Create a new PromptManager from the given configuration.

pub async fn get_text_prompt( &self, name: &str, version: Option<i32>, label: Option<&str>, ) -> Result<TextPromptClient, LangfuseError>

Fetch a text prompt from the API (with caching).

1. Check the cache.
2. On miss, GET /api/public/v2/prompts/{name} with optional version / label query params.
3. Parse the response into a TextPromptClient.
4. Store in cache and return.

pub async fn get_chat_prompt( &self, name: &str, version: Option<i32>, label: Option<&str>, ) -> Result<ChatPromptClient, LangfuseError>

Fetch a chat prompt from the API (with caching).

pub fn clear_cache(&self)

Clear the prompt cache.

pub async fn create_text_prompt( &self, name: &str, template: &str, labels: Option<&[&str]>, tags: Option<&[&str]>, config: Option<&Value>, ) -> Result<TextPromptClient, LangfuseError>

Create a new text prompt via the Langfuse API.

POSTs to /v2/prompts and invalidates any cached entries for this prompt name.

pub async fn create_chat_prompt( &self, name: &str, messages: &[ChatMessage], labels: Option<&[&str]>, tags: Option<&[&str]>, config: Option<&Value>, ) -> Result<ChatPromptClient, LangfuseError>

Create a new chat prompt via the Langfuse API.

POSTs to /v2/prompts and invalidates any cached entries for this prompt name.

pub async fn update_prompt( &self, name: &str, version: i32, new_labels: &[&str], ) -> Result<(), LangfuseError>

Update a prompt’s labels via the Langfuse API.

PATCHes /v2/prompts/{name} and invalidates cached entries for this prompt name.

pub async fn get_prompt( &self, name: &str, version: Option<i32>, label: Option<&str>, ) -> Result<Prompt, LangfuseError>

Fetch a prompt (text or chat) and return it wrapped in the Prompt enum.

Checks the cache first, then fetches from the API. The response type field determines whether a Prompt::Text or Prompt::Chat is returned.

pub async fn fetch_prompts(&self, names: &[&str]) -> HashMap<String, Prompt>

Fetch multiple prompts concurrently, returning those that succeed.

Failed fetches are silently excluded from the result.

Trait Implementations

impl Debug for PromptManager

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

Formats the value using the given formatter.