Enum MergeStrategy 

pub enum MergeStrategy {
    Collect,
    MergeMap,
    First,
    Custom(Arc<dyn Fn(Vec<Value>) -> Value + Send + Sync>),
}

Available on crate feature graph only.

How to combine outputs from multiple upstream parallel paths.

The merge strategy determines how the collected outputs from all upstream branches are combined into a single value for the deferred node’s input.

Example

use adk_graph::deferred::MergeStrategy;

// Default strategy collects all outputs into a Vec
let strategy = MergeStrategy::default();
assert!(matches!(strategy, MergeStrategy::Collect));

// MergeMap combines all output maps with last-write-wins
let strategy = MergeStrategy::MergeMap;

Variants

Collect

Collect all outputs into a Vec<Value>.

Outputs are ordered by the insertion order of source nodes (the order in which they were recorded).

MergeMap

Merge all output maps into a single map (last-write-wins on key conflict).

Each upstream output is expected to be a JSON object. Non-object outputs are skipped. When multiple outputs contain the same key, the value from the later-recorded source wins.

First

Use only the first completed output.

Returns the output from whichever upstream path completed first (i.e., was recorded first).

Custom(Arc<dyn Fn(Vec<Value>) -> Value + Send + Sync>)

Custom merge function.

Accepts a closure that takes all collected outputs and produces a single merged value.

Example

use std::sync::Arc;
use adk_graph::deferred::MergeStrategy;
use serde_json::{json, Value};

let strategy = MergeStrategy::Custom(Arc::new(|outputs: Vec<Value>| {
    json!({ "count": outputs.len() })
}));

Trait Implementations

impl Clone for MergeStrategy

fn clone(&self) -> MergeStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MergeStrategy

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

Formats the value using the given formatter.

impl Default for MergeStrategy

fn default() -> MergeStrategy

Returns the “default value” for a type.