Struct Config 

pub struct Config {
    pub output_dir: PathBuf,
    pub write_interval_secs: u64,
    pub trace_cleanup_interval_secs: u64,
    pub metric_cleanup_interval_secs: u64,
    pub max_trace_buffer_size: usize,
    pub max_metric_buffer_size: usize,
    pub protocols: ProtocolConfig,
    pub forwarding: Option<ForwardingConfig>,
    pub dashboard: DashboardConfig,
    pub metric_temporality: Option<Temporality>,
}

Main configuration structure for the OTLP Arrow Library

This structure contains all configuration options for the library, including output directory, write intervals, cleanup schedules, protocol settings, optional remote forwarding, and dashboard HTTP server.

Configuration Sources

Configuration can be loaded from:

• YAML files
• Environment variables (with OTLP_* prefix)
• Programmatic API (using ConfigBuilder)

Default Values

• output_dir: ./output_dir
• write_interval_secs: 5
• trace_cleanup_interval_secs: 600 (10 minutes)
• metric_cleanup_interval_secs: 3600 (1 hour)
• protocols: Both Protobuf and Arrow Flight enabled by default
• forwarding: Disabled by default
• dashboard: Disabled by default

Example

use otlp_arrow_library::Config;

// Use defaults
let config = Config::default();

// Or use builder
let config = otlp_arrow_library::ConfigBuilder::new()
    .output_dir("./custom_output")
    .write_interval_secs(10)
    .build()?;

Fields

output_dir: PathBuf

Output directory for Arrow IPC files (default: ./output_dir)

write_interval_secs: u64

How frequently to write batches to disk in seconds (default: 5)

trace_cleanup_interval_secs: u64

How frequently to clean old trace files in seconds (default: 600)

metric_cleanup_interval_secs: u64

How frequently to clean old metric files in seconds (default: 3600)

max_trace_buffer_size: usize

Maximum number of trace spans to buffer in memory (default: 10000)

max_metric_buffer_size: usize

Maximum number of metric requests to buffer in memory (default: 10000)

protocols: ProtocolConfig

Protocol configuration (Protobuf and Arrow Flight)

forwarding: Option<ForwardingConfig>

Optional remote forwarding configuration

dashboard: DashboardConfig

Dashboard HTTP server configuration

metric_temporality: Option<Temporality>

Temporality mode for metric exporters (default: Cumulative)

This setting controls how metrics are aggregated:

• Cumulative: Metrics accumulate values over time (default, backward compatible)
• Delta: Metrics represent changes since last export

Note: Temporality is not serializable, so this field is skipped during serialization. It can only be set programmatically via ConfigBuilder.

Implementations

impl Config

pub fn validate(&self) -> Result<(), OtlpConfigError>

Validate configuration values

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Config

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

Formats the value using the given formatter.

impl Default for Config

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Config

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Config

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.