Trait CustomTaskHandler 

pub trait CustomTaskHandler: Send + Sync {
    // Required methods
    fn task_type(&self) -> &str;
    fn handle<'life0, 'life1, 'life2, 'life3, 'life4, 'life5, 'async_trait>(
        &'life0 self,
        task_name: &'life1 str,
        task_type: &'life2 str,
        task_config: &'life3 Value,
        input: &'life4 Value,
        context: &'life5 HandlerContext,
    ) -> Pin<Box<dyn Future<Output = WorkflowResult<Value>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait,
             'life3: 'async_trait,
             'life4: 'async_trait,
             'life5: 'async_trait;
}

Handler for custom/extension task types.

Implement this trait to provide support for custom task types that are not part of the built-in Serverless Workflow specification. Register handlers with WorkflowRunner::with_custom_task_handler().

Example

use async_trait::async_trait;
use serde_json::Value;
use swf_runtime::{CustomTaskHandler, HandlerContext, WorkflowResult};

struct UppercaseHandler;

#[async_trait]
impl CustomTaskHandler for UppercaseHandler {
    fn task_type(&self) -> &str { "uppercase" }

    async fn handle(
        &self,
        task_name: &str,
        task_type: &str,
        task_config: &Value,
        input: &Value,
        context: &HandlerContext,
    ) -> WorkflowResult<Value> {
        let text = input["text"].as_str().unwrap_or("");
        Ok(serde_json::json!({ "result": text.to_uppercase() }))
    }
}

Required Methods

fn task_type(&self) -> &str

Returns the custom task type this handler supports (e.g., “myCustomTask”)

fn handle<'life0, 'life1, 'life2, 'life3, 'life4, 'life5, 'async_trait>( &'life0 self, task_name: &'life1 str, task_type: &'life2 str, task_config: &'life3 Value, input: &'life4 Value, context: &'life5 HandlerContext, ) -> Pin<Box<dyn Future<Output = WorkflowResult<Value>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, 'life4: 'async_trait, 'life5: 'async_trait,

Executes the custom task with the given configuration, input, and workflow context.

Implementors