Module prelude 

User-facing re-exports for the trait-based approach.

Single import for everything needed to write a durable Lambda handler:

use durable_lambda_trait::prelude::*;

Complete Minimal Handler

use durable_lambda_trait::prelude::*;

struct MyHandler;

#[async_trait::async_trait]
impl DurableHandler for MyHandler {
    async fn handle(
        &self,
        event: serde_json::Value,
        mut ctx: TraitContext,
    ) -> Result<serde_json::Value, DurableError> {
        let result: Result<String, String> = ctx.step("greet", || async {
            Ok("Hello from durable Lambda!".to_string())
        }).await?;
        Ok(serde_json::json!({ "greeting": result.unwrap() }))
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    run(MyHandler).await
}

This re-exports:

• DurableHandler — the trait for defining durable handlers
• TraitContext — the context wrapper for durable operations
• run — the entry point for trait-based handlers
• Core types: DurableError, StepOptions, CallbackOptions, CallbackHandle, ExecutionMode, CheckpointResult

Re-exports

pub use crate::context::TraitContext;

pub use crate::handler::run;

pub use crate::handler::DurableHandler;

Structs

BatchItem

A single branch outcome within a BatchResult.

BatchResult

Result of a parallel or map operation containing all branch outcomes.

CallbackHandle

Handle returned by [DurableContext::create_callback] containing the server-generated callback ID.

CallbackOptions

Configure callback timeout behavior.

MapOptions

Configure map operation behavior including batching.

ParallelOptions

Configure parallel execution behavior.

StepOptions

Configure retry behavior for step operations.

Enums

BatchItemStatus

Status of an individual branch in a parallel operation.

CheckpointResult

Represent the checkpointed outcome of a durable step operation.

CompletionReason

Reason the parallel block completed.

DurableError

Represent all errors that can occur within the durable-lambda SDK.

ExecutionMode

Signal whether the replay engine is replaying from history or executing new operations.

Traits

DurableContextOps

Shared interface for all durable context types.