839 lines
29 KiB
Rust
839 lines
29 KiB
Rust
use super::traits::ChatMessage;
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use super::Provider;
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use async_trait::async_trait;
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use std::collections::HashMap;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::time::Duration;
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/// Check if an error is non-retryable (client errors that won't resolve with retries).
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fn is_non_retryable(err: &anyhow::Error) -> bool {
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if let Some(reqwest_err) = err.downcast_ref::<reqwest::Error>() {
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if let Some(status) = reqwest_err.status() {
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let code = status.as_u16();
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return status.is_client_error() && code != 429 && code != 408;
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}
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}
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let msg = err.to_string();
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for word in msg.split(|c: char| !c.is_ascii_digit()) {
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if let Ok(code) = word.parse::<u16>() {
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if (400..500).contains(&code) {
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return code != 429 && code != 408;
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}
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}
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}
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false
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}
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/// Check if an error is a rate-limit (429) error.
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fn is_rate_limited(err: &anyhow::Error) -> bool {
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if let Some(reqwest_err) = err.downcast_ref::<reqwest::Error>() {
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if let Some(status) = reqwest_err.status() {
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return status.as_u16() == 429;
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}
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}
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let msg = err.to_string();
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msg.contains("429")
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&& (msg.contains("Too Many") || msg.contains("rate") || msg.contains("limit"))
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}
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/// Try to extract a Retry-After value (in milliseconds) from an error message.
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/// Looks for patterns like `Retry-After: 5` or `retry_after: 2.5` in the error string.
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fn parse_retry_after_ms(err: &anyhow::Error) -> Option<u64> {
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let msg = err.to_string();
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let lower = msg.to_lowercase();
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// Look for "retry-after: <number>" or "retry_after: <number>"
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for prefix in &[
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"retry-after:",
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"retry_after:",
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"retry-after ",
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"retry_after ",
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] {
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if let Some(pos) = lower.find(prefix) {
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let after = &msg[pos + prefix.len()..];
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let num_str: String = after
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.trim()
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.chars()
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.take_while(|c| c.is_ascii_digit() || *c == '.')
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.collect();
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if let Ok(secs) = num_str.parse::<f64>() {
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if secs.is_finite() && secs >= 0.0 {
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let millis = Duration::from_secs_f64(secs).as_millis();
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if let Ok(value) = u64::try_from(millis) {
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return Some(value);
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}
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}
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}
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}
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}
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None
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}
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/// Provider wrapper with retry, fallback, auth rotation, and model failover.
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pub struct ReliableProvider {
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providers: Vec<(String, Box<dyn Provider>)>,
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max_retries: u32,
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base_backoff_ms: u64,
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/// Extra API keys for rotation (index tracks round-robin position).
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api_keys: Vec<String>,
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key_index: AtomicUsize,
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/// Per-model fallback chains: model_name → [fallback_model_1, fallback_model_2, ...]
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model_fallbacks: HashMap<String, Vec<String>>,
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}
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impl ReliableProvider {
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pub fn new(
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providers: Vec<(String, Box<dyn Provider>)>,
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max_retries: u32,
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base_backoff_ms: u64,
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) -> Self {
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Self {
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providers,
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max_retries,
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base_backoff_ms: base_backoff_ms.max(50),
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api_keys: Vec::new(),
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key_index: AtomicUsize::new(0),
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model_fallbacks: HashMap::new(),
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}
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}
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/// Set additional API keys for round-robin rotation on rate-limit errors.
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pub fn with_api_keys(mut self, keys: Vec<String>) -> Self {
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self.api_keys = keys;
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self
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}
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/// Set per-model fallback chains.
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pub fn with_model_fallbacks(mut self, fallbacks: HashMap<String, Vec<String>>) -> Self {
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self.model_fallbacks = fallbacks;
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self
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}
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/// Build the list of models to try: [original, fallback1, fallback2, ...]
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fn model_chain<'a>(&'a self, model: &'a str) -> Vec<&'a str> {
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let mut chain = vec![model];
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if let Some(fallbacks) = self.model_fallbacks.get(model) {
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chain.extend(fallbacks.iter().map(|s| s.as_str()));
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}
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chain
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}
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/// Advance to the next API key and return it, or None if no extra keys configured.
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fn rotate_key(&self) -> Option<&str> {
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if self.api_keys.is_empty() {
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return None;
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}
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let idx = self.key_index.fetch_add(1, Ordering::Relaxed) % self.api_keys.len();
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Some(&self.api_keys[idx])
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}
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/// Compute backoff duration, respecting Retry-After if present.
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fn compute_backoff(&self, base: u64, err: &anyhow::Error) -> u64 {
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if let Some(retry_after) = parse_retry_after_ms(err) {
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// Use Retry-After but cap at 30s to avoid indefinite waits
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retry_after.min(30_000).max(base)
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} else {
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base
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}
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}
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}
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#[async_trait]
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impl Provider for ReliableProvider {
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async fn warmup(&self) -> anyhow::Result<()> {
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for (name, provider) in &self.providers {
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tracing::info!(provider = name, "Warming up provider connection pool");
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if let Err(e) = provider.warmup().await {
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tracing::warn!(provider = name, "Warmup failed (non-fatal): {e}");
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}
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}
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Ok(())
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}
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async fn chat_with_system(
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&self,
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system_prompt: Option<&str>,
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message: &str,
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model: &str,
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temperature: f64,
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) -> anyhow::Result<String> {
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let models = self.model_chain(model);
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let mut failures = Vec::new();
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for current_model in &models {
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for (provider_name, provider) in &self.providers {
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let mut backoff_ms = self.base_backoff_ms;
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for attempt in 0..=self.max_retries {
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match provider
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.chat_with_system(system_prompt, message, current_model, temperature)
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.await
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{
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Ok(resp) => {
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if attempt > 0 || *current_model != model {
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tracing::info!(
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provider = provider_name,
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model = *current_model,
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attempt,
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original_model = model,
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"Provider recovered (failover/retry)"
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);
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}
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return Ok(resp);
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}
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Err(e) => {
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let non_retryable = is_non_retryable(&e);
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let rate_limited = is_rate_limited(&e);
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failures.push(format!(
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"{provider_name}/{current_model} attempt {}/{}: {e}",
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attempt + 1,
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self.max_retries + 1
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));
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// On rate-limit, try rotating API key
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if rate_limited {
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if let Some(new_key) = self.rotate_key() {
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tracing::info!(
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provider = provider_name,
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"Rate limited, rotated API key (key ending ...{})",
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&new_key[new_key.len().saturating_sub(4)..]
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);
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}
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}
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if non_retryable {
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tracing::warn!(
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provider = provider_name,
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model = *current_model,
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"Non-retryable error, moving on"
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);
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break;
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}
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if attempt < self.max_retries {
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let wait = self.compute_backoff(backoff_ms, &e);
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tracing::warn!(
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provider = provider_name,
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model = *current_model,
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attempt = attempt + 1,
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backoff_ms = wait,
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"Provider call failed, retrying"
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);
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tokio::time::sleep(Duration::from_millis(wait)).await;
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backoff_ms = (backoff_ms.saturating_mul(2)).min(10_000);
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}
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}
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}
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}
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tracing::warn!(
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provider = provider_name,
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model = *current_model,
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"Exhausted retries, trying next provider/model"
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);
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}
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if *current_model != model {
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tracing::warn!(
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original_model = model,
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fallback_model = *current_model,
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"Model fallback exhausted all providers, trying next fallback model"
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);
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}
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}
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anyhow::bail!(
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"All providers/models failed. Attempts:\n{}",
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failures.join("\n")
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)
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}
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async fn chat_with_history(
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&self,
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messages: &[ChatMessage],
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model: &str,
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temperature: f64,
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) -> anyhow::Result<String> {
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let models = self.model_chain(model);
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let mut failures = Vec::new();
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for current_model in &models {
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for (provider_name, provider) in &self.providers {
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let mut backoff_ms = self.base_backoff_ms;
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for attempt in 0..=self.max_retries {
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match provider
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.chat_with_history(messages, current_model, temperature)
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.await
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{
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Ok(resp) => {
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if attempt > 0 || *current_model != model {
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tracing::info!(
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provider = provider_name,
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model = *current_model,
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attempt,
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original_model = model,
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"Provider recovered (failover/retry)"
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);
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}
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return Ok(resp);
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}
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Err(e) => {
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let non_retryable = is_non_retryable(&e);
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let rate_limited = is_rate_limited(&e);
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failures.push(format!(
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"{provider_name}/{current_model} attempt {}/{}: {e}",
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attempt + 1,
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self.max_retries + 1
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));
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if rate_limited {
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if let Some(new_key) = self.rotate_key() {
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tracing::info!(
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provider = provider_name,
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"Rate limited, rotated API key (key ending ...{})",
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&new_key[new_key.len().saturating_sub(4)..]
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);
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}
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}
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if non_retryable {
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tracing::warn!(
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provider = provider_name,
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model = *current_model,
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"Non-retryable error, moving on"
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);
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break;
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}
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if attempt < self.max_retries {
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let wait = self.compute_backoff(backoff_ms, &e);
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tracing::warn!(
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provider = provider_name,
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model = *current_model,
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attempt = attempt + 1,
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backoff_ms = wait,
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"Provider call failed, retrying"
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);
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tokio::time::sleep(Duration::from_millis(wait)).await;
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backoff_ms = (backoff_ms.saturating_mul(2)).min(10_000);
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}
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}
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}
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}
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tracing::warn!(
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provider = provider_name,
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model = *current_model,
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"Exhausted retries, trying next provider/model"
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);
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}
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}
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anyhow::bail!(
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"All providers/models failed. Attempts:\n{}",
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failures.join("\n")
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)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use std::sync::Arc;
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struct MockProvider {
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calls: Arc<AtomicUsize>,
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fail_until_attempt: usize,
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response: &'static str,
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error: &'static str,
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}
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#[async_trait]
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impl Provider for MockProvider {
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async fn chat_with_system(
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&self,
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_system_prompt: Option<&str>,
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_message: &str,
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_model: &str,
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_temperature: f64,
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) -> anyhow::Result<String> {
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let attempt = self.calls.fetch_add(1, Ordering::SeqCst) + 1;
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if attempt <= self.fail_until_attempt {
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anyhow::bail!(self.error);
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}
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Ok(self.response.to_string())
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}
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async fn chat_with_history(
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&self,
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_messages: &[ChatMessage],
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_model: &str,
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_temperature: f64,
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) -> anyhow::Result<String> {
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let attempt = self.calls.fetch_add(1, Ordering::SeqCst) + 1;
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if attempt <= self.fail_until_attempt {
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anyhow::bail!(self.error);
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}
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Ok(self.response.to_string())
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}
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}
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/// Mock that records which model was used for each call.
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struct ModelAwareMock {
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calls: Arc<AtomicUsize>,
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models_seen: std::sync::Mutex<Vec<String>>,
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fail_models: Vec<&'static str>,
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response: &'static str,
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}
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#[async_trait]
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impl Provider for ModelAwareMock {
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async fn chat_with_system(
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&self,
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_system_prompt: Option<&str>,
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_message: &str,
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model: &str,
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_temperature: f64,
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) -> anyhow::Result<String> {
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self.calls.fetch_add(1, Ordering::SeqCst);
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self.models_seen.lock().unwrap().push(model.to_string());
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if self.fail_models.contains(&model) {
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anyhow::bail!("500 model {} unavailable", model);
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}
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Ok(self.response.to_string())
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}
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}
|
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|
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// ── Existing tests (preserved) ──
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#[tokio::test]
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async fn succeeds_without_retry() {
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let calls = Arc::new(AtomicUsize::new(0));
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let provider = ReliableProvider::new(
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vec![(
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"primary".into(),
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Box::new(MockProvider {
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calls: Arc::clone(&calls),
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fail_until_attempt: 0,
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response: "ok",
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error: "boom",
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}),
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)],
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2,
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1,
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);
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let result = provider.simple_chat("hello", "test", 0.0).await.unwrap();
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assert_eq!(result, "ok");
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assert_eq!(calls.load(Ordering::SeqCst), 1);
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}
|
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|
|
#[tokio::test]
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async fn retries_then_recovers() {
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let calls = Arc::new(AtomicUsize::new(0));
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let provider = ReliableProvider::new(
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vec![(
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"primary".into(),
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Box::new(MockProvider {
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calls: Arc::clone(&calls),
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fail_until_attempt: 1,
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response: "recovered",
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error: "temporary",
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}),
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)],
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2,
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1,
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);
|
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let result = provider.simple_chat("hello", "test", 0.0).await.unwrap();
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assert_eq!(result, "recovered");
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assert_eq!(calls.load(Ordering::SeqCst), 2);
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}
|
|
|
|
#[tokio::test]
|
|
async fn falls_back_after_retries_exhausted() {
|
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let primary_calls = Arc::new(AtomicUsize::new(0));
|
|
let fallback_calls = Arc::new(AtomicUsize::new(0));
|
|
|
|
let provider = ReliableProvider::new(
|
|
vec![
|
|
(
|
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"primary".into(),
|
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Box::new(MockProvider {
|
|
calls: Arc::clone(&primary_calls),
|
|
fail_until_attempt: usize::MAX,
|
|
response: "never",
|
|
error: "primary down",
|
|
}),
|
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),
|
|
(
|
|
"fallback".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&fallback_calls),
|
|
fail_until_attempt: 0,
|
|
response: "from fallback",
|
|
error: "fallback down",
|
|
}),
|
|
),
|
|
],
|
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1,
|
|
1,
|
|
);
|
|
|
|
let result = provider.simple_chat("hello", "test", 0.0).await.unwrap();
|
|
assert_eq!(result, "from fallback");
|
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assert_eq!(primary_calls.load(Ordering::SeqCst), 2);
|
|
assert_eq!(fallback_calls.load(Ordering::SeqCst), 1);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn returns_aggregated_error_when_all_providers_fail() {
|
|
let provider = ReliableProvider::new(
|
|
vec![
|
|
(
|
|
"p1".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::new(AtomicUsize::new(0)),
|
|
fail_until_attempt: usize::MAX,
|
|
response: "never",
|
|
error: "p1 error",
|
|
}),
|
|
),
|
|
(
|
|
"p2".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::new(AtomicUsize::new(0)),
|
|
fail_until_attempt: usize::MAX,
|
|
response: "never",
|
|
error: "p2 error",
|
|
}),
|
|
),
|
|
],
|
|
0,
|
|
1,
|
|
);
|
|
|
|
let err = provider
|
|
.simple_chat("hello", "test", 0.0)
|
|
.await
|
|
.expect_err("all providers should fail");
|
|
let msg = err.to_string();
|
|
assert!(msg.contains("All providers/models failed"));
|
|
assert!(msg.contains("p1"));
|
|
assert!(msg.contains("p2"));
|
|
}
|
|
|
|
#[test]
|
|
fn non_retryable_detects_common_patterns() {
|
|
assert!(is_non_retryable(&anyhow::anyhow!("400 Bad Request")));
|
|
assert!(is_non_retryable(&anyhow::anyhow!("401 Unauthorized")));
|
|
assert!(is_non_retryable(&anyhow::anyhow!("403 Forbidden")));
|
|
assert!(is_non_retryable(&anyhow::anyhow!("404 Not Found")));
|
|
assert!(!is_non_retryable(&anyhow::anyhow!("429 Too Many Requests")));
|
|
assert!(!is_non_retryable(&anyhow::anyhow!("408 Request Timeout")));
|
|
assert!(!is_non_retryable(&anyhow::anyhow!(
|
|
"500 Internal Server Error"
|
|
)));
|
|
assert!(!is_non_retryable(&anyhow::anyhow!("502 Bad Gateway")));
|
|
assert!(!is_non_retryable(&anyhow::anyhow!("timeout")));
|
|
assert!(!is_non_retryable(&anyhow::anyhow!("connection reset")));
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn skips_retries_on_non_retryable_error() {
|
|
let primary_calls = Arc::new(AtomicUsize::new(0));
|
|
let fallback_calls = Arc::new(AtomicUsize::new(0));
|
|
|
|
let provider = ReliableProvider::new(
|
|
vec![
|
|
(
|
|
"primary".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&primary_calls),
|
|
fail_until_attempt: usize::MAX,
|
|
response: "never",
|
|
error: "401 Unauthorized",
|
|
}),
|
|
),
|
|
(
|
|
"fallback".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&fallback_calls),
|
|
fail_until_attempt: 0,
|
|
response: "from fallback",
|
|
error: "fallback err",
|
|
}),
|
|
),
|
|
],
|
|
3,
|
|
1,
|
|
);
|
|
|
|
let result = provider.simple_chat("hello", "test", 0.0).await.unwrap();
|
|
assert_eq!(result, "from fallback");
|
|
// Primary should have been called only once (no retries)
|
|
assert_eq!(primary_calls.load(Ordering::SeqCst), 1);
|
|
assert_eq!(fallback_calls.load(Ordering::SeqCst), 1);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn chat_with_history_retries_then_recovers() {
|
|
let calls = Arc::new(AtomicUsize::new(0));
|
|
let provider = ReliableProvider::new(
|
|
vec![(
|
|
"primary".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&calls),
|
|
fail_until_attempt: 1,
|
|
response: "history ok",
|
|
error: "temporary",
|
|
}),
|
|
)],
|
|
2,
|
|
1,
|
|
);
|
|
|
|
let messages = vec![ChatMessage::system("system"), ChatMessage::user("hello")];
|
|
let result = provider
|
|
.chat_with_history(&messages, "test", 0.0)
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(result, "history ok");
|
|
assert_eq!(calls.load(Ordering::SeqCst), 2);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn chat_with_history_falls_back() {
|
|
let primary_calls = Arc::new(AtomicUsize::new(0));
|
|
let fallback_calls = Arc::new(AtomicUsize::new(0));
|
|
|
|
let provider = ReliableProvider::new(
|
|
vec![
|
|
(
|
|
"primary".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&primary_calls),
|
|
fail_until_attempt: usize::MAX,
|
|
response: "never",
|
|
error: "primary down",
|
|
}),
|
|
),
|
|
(
|
|
"fallback".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&fallback_calls),
|
|
fail_until_attempt: 0,
|
|
response: "fallback ok",
|
|
error: "fallback err",
|
|
}),
|
|
),
|
|
],
|
|
1,
|
|
1,
|
|
);
|
|
|
|
let messages = vec![ChatMessage::user("hello")];
|
|
let result = provider
|
|
.chat_with_history(&messages, "test", 0.0)
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(result, "fallback ok");
|
|
assert_eq!(primary_calls.load(Ordering::SeqCst), 2);
|
|
assert_eq!(fallback_calls.load(Ordering::SeqCst), 1);
|
|
}
|
|
|
|
// ── New tests: model failover ──
|
|
|
|
#[tokio::test]
|
|
async fn model_failover_tries_fallback_model() {
|
|
let calls = Arc::new(AtomicUsize::new(0));
|
|
let mock = Arc::new(ModelAwareMock {
|
|
calls: Arc::clone(&calls),
|
|
models_seen: std::sync::Mutex::new(Vec::new()),
|
|
fail_models: vec!["claude-opus"],
|
|
response: "ok from sonnet",
|
|
});
|
|
|
|
let mut fallbacks = HashMap::new();
|
|
fallbacks.insert("claude-opus".to_string(), vec!["claude-sonnet".to_string()]);
|
|
|
|
let provider = ReliableProvider::new(
|
|
vec![(
|
|
"anthropic".into(),
|
|
Box::new(mock.clone()) as Box<dyn Provider>,
|
|
)],
|
|
0, // no retries — force immediate model failover
|
|
1,
|
|
)
|
|
.with_model_fallbacks(fallbacks);
|
|
|
|
let result = provider
|
|
.simple_chat("hello", "claude-opus", 0.0)
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(result, "ok from sonnet");
|
|
|
|
let seen = mock.models_seen.lock().unwrap();
|
|
assert_eq!(seen.len(), 2);
|
|
assert_eq!(seen[0], "claude-opus");
|
|
assert_eq!(seen[1], "claude-sonnet");
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn model_failover_all_models_fail() {
|
|
let calls = Arc::new(AtomicUsize::new(0));
|
|
let mock = Arc::new(ModelAwareMock {
|
|
calls: Arc::clone(&calls),
|
|
models_seen: std::sync::Mutex::new(Vec::new()),
|
|
fail_models: vec!["model-a", "model-b", "model-c"],
|
|
response: "never",
|
|
});
|
|
|
|
let mut fallbacks = HashMap::new();
|
|
fallbacks.insert(
|
|
"model-a".to_string(),
|
|
vec!["model-b".to_string(), "model-c".to_string()],
|
|
);
|
|
|
|
let provider = ReliableProvider::new(
|
|
vec![("p1".into(), Box::new(mock.clone()) as Box<dyn Provider>)],
|
|
0,
|
|
1,
|
|
)
|
|
.with_model_fallbacks(fallbacks);
|
|
|
|
let err = provider
|
|
.simple_chat("hello", "model-a", 0.0)
|
|
.await
|
|
.expect_err("all models should fail");
|
|
assert!(err.to_string().contains("All providers/models failed"));
|
|
|
|
let seen = mock.models_seen.lock().unwrap();
|
|
assert_eq!(seen.len(), 3);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn no_model_fallbacks_behaves_like_before() {
|
|
let calls = Arc::new(AtomicUsize::new(0));
|
|
let provider = ReliableProvider::new(
|
|
vec![(
|
|
"primary".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::clone(&calls),
|
|
fail_until_attempt: 0,
|
|
response: "ok",
|
|
error: "boom",
|
|
}),
|
|
)],
|
|
2,
|
|
1,
|
|
);
|
|
// No model_fallbacks set — should work exactly as before
|
|
let result = provider.simple_chat("hello", "test", 0.0).await.unwrap();
|
|
assert_eq!(result, "ok");
|
|
assert_eq!(calls.load(Ordering::SeqCst), 1);
|
|
}
|
|
|
|
// ── New tests: auth rotation ──
|
|
|
|
#[tokio::test]
|
|
async fn auth_rotation_cycles_keys() {
|
|
let provider = ReliableProvider::new(
|
|
vec![(
|
|
"p".into(),
|
|
Box::new(MockProvider {
|
|
calls: Arc::new(AtomicUsize::new(0)),
|
|
fail_until_attempt: 0,
|
|
response: "ok",
|
|
error: "",
|
|
}),
|
|
)],
|
|
0,
|
|
1,
|
|
)
|
|
.with_api_keys(vec!["key-a".into(), "key-b".into(), "key-c".into()]);
|
|
|
|
// Rotate 5 times, verify round-robin
|
|
let keys: Vec<&str> = (0..5).map(|_| provider.rotate_key().unwrap()).collect();
|
|
assert_eq!(keys, vec!["key-a", "key-b", "key-c", "key-a", "key-b"]);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn auth_rotation_returns_none_when_empty() {
|
|
let provider = ReliableProvider::new(vec![], 0, 1);
|
|
assert!(provider.rotate_key().is_none());
|
|
}
|
|
|
|
// ── New tests: Retry-After parsing ──
|
|
|
|
#[test]
|
|
fn parse_retry_after_integer() {
|
|
let err = anyhow::anyhow!("429 Too Many Requests, Retry-After: 5");
|
|
assert_eq!(parse_retry_after_ms(&err), Some(5000));
|
|
}
|
|
|
|
#[test]
|
|
fn parse_retry_after_float() {
|
|
let err = anyhow::anyhow!("Rate limited. retry_after: 2.5 seconds");
|
|
assert_eq!(parse_retry_after_ms(&err), Some(2500));
|
|
}
|
|
|
|
#[test]
|
|
fn parse_retry_after_missing() {
|
|
let err = anyhow::anyhow!("500 Internal Server Error");
|
|
assert_eq!(parse_retry_after_ms(&err), None);
|
|
}
|
|
|
|
#[test]
|
|
fn rate_limited_detection() {
|
|
assert!(is_rate_limited(&anyhow::anyhow!("429 Too Many Requests")));
|
|
assert!(is_rate_limited(&anyhow::anyhow!(
|
|
"HTTP 429 rate limit exceeded"
|
|
)));
|
|
assert!(!is_rate_limited(&anyhow::anyhow!("401 Unauthorized")));
|
|
assert!(!is_rate_limited(&anyhow::anyhow!(
|
|
"500 Internal Server Error"
|
|
)));
|
|
}
|
|
|
|
#[test]
|
|
fn compute_backoff_uses_retry_after() {
|
|
let provider = ReliableProvider::new(vec![], 0, 500);
|
|
let err = anyhow::anyhow!("429 Retry-After: 3");
|
|
assert_eq!(provider.compute_backoff(500, &err), 3000);
|
|
}
|
|
|
|
#[test]
|
|
fn compute_backoff_caps_at_30s() {
|
|
let provider = ReliableProvider::new(vec![], 0, 500);
|
|
let err = anyhow::anyhow!("429 Retry-After: 120");
|
|
assert_eq!(provider.compute_backoff(500, &err), 30_000);
|
|
}
|
|
|
|
#[test]
|
|
fn compute_backoff_falls_back_to_base() {
|
|
let provider = ReliableProvider::new(vec![], 0, 500);
|
|
let err = anyhow::anyhow!("500 Server Error");
|
|
assert_eq!(provider.compute_backoff(500, &err), 500);
|
|
}
|
|
|
|
// ── Arc<ModelAwareMock> Provider impl for test ──
|
|
|
|
#[async_trait]
|
|
impl Provider for Arc<ModelAwareMock> {
|
|
async fn chat_with_system(
|
|
&self,
|
|
system_prompt: Option<&str>,
|
|
message: &str,
|
|
model: &str,
|
|
temperature: f64,
|
|
) -> anyhow::Result<String> {
|
|
self.as_ref()
|
|
.chat_with_system(system_prompt, message, model, temperature)
|
|
.await
|
|
}
|
|
}
|
|
}
|