@crikey/stores-base-queue

Internal peer package used to ensure signals emitted from stores are executed in a reliable predictable manner even as stores and subscriptions are changed.

See @crikey/stores-base-queue for full documentation.

API

Queue functions

• enqueue_store_signals - add actions onto the queue

Action running:

• store_runner - Current (global) action runner
• set_store_runner - Set current (global) action runner
• get_store_runner - Get current (global) action runner

Default action runners:

• store_runner_hide_errors - Swallow all error emitted by actions
• store_runner_throw_errors - Do not handle errors emitted by actions
• create_store_runner_log_errors - Create an action runner which logs errors emitted by actions

Installation

Note: It is important that this package be installed as a peer dependency to ensure the queue is shared between store implementations

1# pnpm
2$ pnpm add --save-peer @crikey/stores-base-queue
3
4# npm
5$ npm add --save-peer @crikey/stores-base-queue
6
7# yarn
8$ yarn add --peer @crikey/stores-base-queue

Usage

Enqueue the provided actions using a FIFO queue. If the queue is empty, the actions will begin being called immediately until the queue is exhausted. Further actions may be added during execution which will be executed once the preceding actions are exhausted.

Example:

1const action_a = () => { console.log('action a') };
2const action_b = () => { console.log('action b') };
3
4enqueue_store_signals([
5    action_a,
6    action_b
7]);
8
9// > action a
10// > action b

Example with nesting:

1enqueue_store_signals([
2    () => { console.log("action 1") },
3    () => {
4        console.log("action 2");
5        enqueue_store_signals([
6            () => { console.log("action 5") },
7            () => { console.log("action 6") }
8        ]);
9        console.log("action 3");
10    },
11    () => { console.log("action 4") },
12]);
13
14// > action 1
15// > action 2
16// > action 3
17// > action 4
18// > action 5
19// > action 6

Example Exception Handling:

1const original_runner = set_store_runner(create_store_runner_log_errors(console.error));
2try {
3    enqueue_store_signals([
4        () => {
5            throw new Error('error 1');
6        },
7        () => {
8            throw new Error('error 2');
9        },
10        () => {
11            throw new Error('error 3');
12        }
13    ]);
14
15    console.log('done.');
16
17    // > Error: error 1
18    // > Error: error 2
19    // > Error: error 3
20    // > done.
21} finally {
22    set_store_runner(original_runner);
23}