Struct SimulatorConfig 

pub struct SimulatorConfig {

    pub invocation_timeout_ms: u64,
    pub init_timeout_ms: u64,
    pub function_name: String,
    pub function_version: String,
    pub memory_size_mb: u32,
    pub log_group_name: String,
    pub log_stream_name: String,
    pub extension_ready_timeout_ms: u64,
    pub shutdown_timeout_ms: u64,
    pub instance_id: String,
    pub handler: Option<String>,
    pub account_id: Option<String>,
    pub region: String,
}

Configuration for the Lambda runtime simulator.

Timeout Limitations

Timeout values are used for calculating invocation deadlines (the Lambda-Runtime-Deadline-Ms header). Actual timeout enforcement is not yet implemented - invocations will not be automatically terminated when they exceed their configured timeout.

Fields

invocation_timeout_ms: u64

Default timeout for invocations in milliseconds.

Used for deadline calculation in the Lambda-Runtime-Deadline-Ms header. Timeout enforcement is not currently implemented.

init_timeout_ms: u64

Timeout for initialisation phase in milliseconds.

Not currently enforced.

function_name: String

Lambda function name, used in telemetry events and environment variables.

function_version: String

Lambda function version (e.g., “$LATEST” or a published version number).

memory_size_mb: u32

Function memory allocation in MB, used in telemetry metrics.

log_group_name: String

CloudWatch Logs group name for the function.

log_stream_name: String

CloudWatch Logs stream name for this execution environment.

extension_ready_timeout_ms: u64

Timeout for waiting for extensions to be ready in milliseconds.

After the runtime completes an invocation, this is the maximum time to wait for all extensions to signal readiness before proceeding with platform.report emission and process freezing.

shutdown_timeout_ms: u64

Timeout for graceful shutdown in milliseconds.

During graceful shutdown, this is the maximum time to wait for extensions subscribed to SHUTDOWN events to complete their cleanup work by polling /next again.

instance_id: String

Unique instance identifier for this simulator run.

Used in telemetry events to identify the Lambda execution environment.

handler: Option<String>

Function handler name (e.g., “index.handler”).

Used in extension registration responses.

account_id: Option<String>

AWS account ID.

Used in extension registration responses and ARN construction.

region: String

AWS region.

Used for environment variables and ARN construction. Defaults to “us-east-1”.

Trait Implementations

impl Clone for SimulatorConfig

fn clone(&self) -> SimulatorConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SimulatorConfig

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

Formats the value using the given formatter.

impl Default for SimulatorConfig

fn default() -> Self

Returns the “default value” for a type.