meilibridge 0.1.6

High-performance PostgreSQL to Meilisearch connector
Documentation 
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use serde::{Deserialize, Serialize};

/// Error handling configuration
#[derive(Debug, Clone, Default, Deserialize, Serialize)]
pub struct ErrorHandlingConfig {
    /// Retry configuration
    #[serde(default)]
    pub retry: RetryConfig,

    /// Dead letter queue configuration
    #[serde(default)]
    pub dead_letter_queue: DeadLetterQueueConfig,

    /// Circuit breaker configuration
    #[serde(default)]
    pub circuit_breaker: ErrorHandlingCircuitBreakerConfig,
}

/// Retry configuration
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct RetryConfig {
    /// Enable retries
    #[serde(default = "default_true")]
    pub enabled: bool,

    /// Maximum retry attempts
    #[serde(default = "default_max_retries")]
    pub max_attempts: u32,

    /// Initial backoff in milliseconds
    #[serde(default = "default_initial_backoff_ms")]
    pub initial_backoff_ms: u64,

    /// Maximum backoff in milliseconds
    #[serde(default = "default_max_backoff_ms")]
    pub max_backoff_ms: u64,

    /// Backoff multiplier
    #[serde(default = "default_backoff_multiplier")]
    pub backoff_multiplier: f64,

    /// Jitter factor (0.0 to 1.0)
    #[serde(default = "default_jitter_factor")]
    pub jitter_factor: f64,
}

impl Default for RetryConfig {
    fn default() -> Self {
        Self {
            enabled: default_true(),
            max_attempts: default_max_retries(),
            initial_backoff_ms: default_initial_backoff_ms(),
            max_backoff_ms: default_max_backoff_ms(),
            backoff_multiplier: default_backoff_multiplier(),
            jitter_factor: default_jitter_factor(),
        }
    }
}

/// Dead letter queue configuration
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct DeadLetterQueueConfig {
    /// Enable dead letter queue
    #[serde(default = "default_true")]
    pub enabled: bool,

    /// Storage backend (memory, redis)
    #[serde(default = "default_dlq_storage")]
    pub storage: String,

    /// Maximum entries per task
    #[serde(default = "default_max_entries")]
    pub max_entries_per_task: usize,

    /// Retention period in hours
    #[serde(default = "default_retention_hours")]
    pub retention_hours: u64,

    /// Auto-reprocess interval in minutes (0 = disabled)
    #[serde(default)]
    pub auto_reprocess_interval_minutes: u64,
}

impl Default for DeadLetterQueueConfig {
    fn default() -> Self {
        Self {
            enabled: default_true(),
            storage: default_dlq_storage(),
            max_entries_per_task: default_max_entries(),
            retention_hours: default_retention_hours(),
            auto_reprocess_interval_minutes: 0,
        }
    }
}

/// Circuit breaker configuration
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct ErrorHandlingCircuitBreakerConfig {
    /// Enable circuit breaker
    #[serde(default)]
    pub enabled: bool,

    /// Failure threshold percentage (0-100)
    #[serde(default = "default_failure_threshold")]
    pub failure_threshold_percent: u8,

    /// Minimum number of requests before evaluation
    #[serde(default = "default_min_requests")]
    pub min_requests: u32,

    /// Reset timeout in seconds
    #[serde(default = "default_reset_timeout")]
    pub reset_timeout_seconds: u64,

    /// Half-open max requests
    #[serde(default = "default_half_open_requests")]
    pub half_open_max_requests: u32,
}

impl Default for ErrorHandlingCircuitBreakerConfig {
    fn default() -> Self {
        Self {
            enabled: false,
            failure_threshold_percent: default_failure_threshold(),
            min_requests: default_min_requests(),
            reset_timeout_seconds: default_reset_timeout(),
            half_open_max_requests: default_half_open_requests(),
        }
    }
}

// Default value functions
fn default_true() -> bool {
    true
}
fn default_max_retries() -> u32 {
    3
}
fn default_initial_backoff_ms() -> u64 {
    100
}
fn default_max_backoff_ms() -> u64 {
    30000
}
fn default_backoff_multiplier() -> f64 {
    2.0
}
fn default_jitter_factor() -> f64 {
    0.1
}
fn default_dlq_storage() -> String {
    "memory".to_string()
}
fn default_max_entries() -> usize {
    10000
}
fn default_retention_hours() -> u64 {
    24
}
fn default_failure_threshold() -> u8 {
    50
}
fn default_min_requests() -> u32 {
    10
}
fn default_reset_timeout() -> u64 {
    60
}
fn default_half_open_requests() -> u32 {
    5
}