Merge pull request #29 from defer-run/concurrency-feature

.changeset/cyan-cameras-grin.md

@@ -0,0 +1,15 @@
+---
+"@defer/client": major
+---
+
+Add concurrency limit option.
+
+```js
+import { defer } from "@defer.run/client";
+
+async function oneByOne() {
+  // do something...
+}
+
+export default defer(oneByOne, { concurrency: 1 });
+```

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@defer.run/client",
+  "name": "@defer/client",
   "version": "0.5.0",
   "description": "Zero infrastructure NodeJS background jobs",
   "main": "dist/cjs/index.js",

src/index.ts

@@ -52,11 +52,64 @@ export type DeferRetFnParameters<
 
 export type RetryNumber = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12;
 
+export type Concurrency =
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 export interface HasDeferMetadata {
   __metadata: {
     version: number;
     cron?: string;
     retry?: RetryNumber;
+    concurrency?: Concurrency;
   };
 }
 
@@ -92,6 +145,7 @@ export interface Defer {
 
 export interface DeferOptions {
   retry?: boolean | RetryNumber;
+  concurrency?: Concurrency;
 }
 
 export const defer: Defer = (fn, options) => {