Delivery

KIT · constant · Runtime value

Import

TypeScript

import { Delivery } from '@jangts/agent-core/kits/delivery';

JavaScript

import { Delivery } from '@jangts/agent-core/kits/delivery';

Other public entry points:@jangts/agent-core/types, @jangts/agent-core/kits/delivery, @jangts/agent-core/kits.

Definition

Member index

Member	Purpose
defineDelivery	See the overload below for full inputs and outputs.

Member details

defineDelivery

Delivery.defineDelivery<Input, State, Result, StageId extends string>(options: DeliveryOptions<Input, State, Result, StageId>): Readonly<{ stages: readonly { id: StageId; }[]; deliver(input: Input, execution: ExecutionContext): Result; }>

Compile a delivery pipeline from its declared stages.

Stages are registered once, in declaration order, and must have unique non-blank ids. A stage without a handle is a named hook only, so beforeStage can observe it.

Type parameter	Constraint	Default type
Input	—	—
State	—	—
Result	—	—
StageId	string	—

Parameter	Type	Passing	Description
options	DeliveryOptions<Input, State, Result, StageId>	Required	—

Fields of options

Field	Type	Required	Description
createState	(input: Input, context: ExecutionContext) => State	Required	Read-only. Creates the mutable per-run state; must return synchronously.
stages	readonly DeliveryStage<Input, State, Result, StageId>[]	Required	Read-only. Stages in execution order; ids must be unique.
beforeStage	((input: { stageId: StageId; state: State; }, context: OperationContext<Input>) => void) | undefined	Optional	Read-only. Observes every stage before it runs, including stages without a handler.
missingResult	() => Error	Required	Read-only. Builds the error thrown when every stage returned continue.

Returns: Readonly<{ stages: readonly { id: StageId; }[]; deliver(input: Input, execution: ExecutionContext): Result; }>.

Return value structure

Field	Type	Required	Description
stages	readonly { id: StageId; }[]	Required	See the type definition and usage context.
deliver	(input: Input, execution: ExecutionContext) => Result	Required	Build the state and run the stages in order. The first complete outcome ends the pipeline and returns its value; if none completes, missingResult supplies the error.

Examples

• Delivery: sequential delivery with an explicit end: Each delivery stage explicitly continues or completes; once a stage completes, the run ends immediately.

Deliver a piece of text that is already confirmed

Beginner · Node.js

TypeScript

import { Delivery } from '@jangts/agent-core/kits/delivery';
const delivery = Delivery.defineDelivery({
  createState: (input: string) => ({ text: input }),
  stages: [{ id: 'publish', handle: (state: { text: string }) => ({ type: 'complete' as const, value: state.text }) }],
  missingResult: () => new Error('没有可交付结果'),
});
console.log(delivery.deliver('已完成的答复', { signal: new AbortController().signal }));

JavaScript

import { Delivery } from '@jangts/agent-core/kits/delivery';
const delivery = Delivery.defineDelivery({
    createState: (input) => ({ text: input }),
    stages: [{ id: 'publish', handle: (state) => ({ type: 'complete', value: state.text }) }],
    missingResult: () => new Error('没有可交付结果'),
});
console.log(delivery.deliver('已完成的答复', { signal: new AbortController().signal }));

Add a validation stage while keeping the same deliver

Configuration · Node.js

TypeScript

import { Delivery } from '@jangts/agent-core/kits/delivery';
const delivery = Delivery.defineDelivery({
  createState: (input: string) => ({ text: input.trim() }),
  stages: [
    { id: 'check', handle(state: { text: string }) {
      if (!state.text) throw new Error('答复为空');
      return { type: 'continue' as const };
    } },
    { id: 'publish', handle: (state: { text: string }) => ({ type: 'complete' as const, value: state.text }) },
  ],
  beforeStage: ({ stageId }: { stageId: string }) => { console.log('阶段', stageId); },
  missingResult: () => new Error('没有可交付结果'),
});
console.log(delivery.deliver(' 已完成的答复 ', { signal: new AbortController().signal }));

JavaScript

import { Delivery } from '@jangts/agent-core/kits/delivery';
const delivery = Delivery.defineDelivery({
    createState: (input) => ({ text: input.trim() }),
    stages: [
        { id: 'check', handle(state) {
                if (!state.text)
                    throw new Error('答复为空');
                return { type: 'continue' };
            } },
        { id: 'publish', handle: (state) => ({ type: 'complete', value: state.text }) },
    ],
    beforeStage: ({ stageId }) => { console.log('阶段', stageId); },
    missingResult: () => new Error('没有可交付结果'),
});
console.log(delivery.deliver(' 已完成的答复 ', { signal: new AbortController().signal }));

Related policy source

• Interleaved hooks, stage short-circuiting, and cancellation checks

Related definitions

• defineDelivery
• DeliveryOptions