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Merge pull request #97 from oliver-oloughlin/feature/set-interval
Feature/set interval
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| import { ATOMIC_OPERATION_MUTATION_LIMIT } from "./constants.ts" | ||
| import { SetOptions } from "./types.ts" | ||
|
|
||
| export class AtomicWrapper implements Deno.AtomicOperation { | ||
| private kv: Deno.Kv | ||
| private current: Deno.AtomicOperation | ||
| private atomics: Deno.AtomicOperation[] | ||
| private count: number | ||
| private atomicBatchSize: number | ||
|
|
||
| constructor( | ||
| kv: Deno.Kv, | ||
| atomicBatchSize = ATOMIC_OPERATION_MUTATION_LIMIT / 4, | ||
| ) { | ||
| this.kv = kv | ||
| this.current = kv.atomic() | ||
| this.atomics = [] | ||
| this.count = 0 | ||
| this.atomicBatchSize = atomicBatchSize | ||
| } | ||
|
|
||
| set(key: Deno.KvKey, value: unknown, options?: SetOptions) { | ||
| this.addMutation((op) => op.set(key, value, options)) | ||
| return this | ||
| } | ||
|
|
||
| delete(key: Deno.KvKey) { | ||
| this.addMutation((op) => op.delete(key)) | ||
| return this | ||
| } | ||
|
|
||
| mutate(...mutations: Deno.KvMutation[]) { | ||
| this.addMutation((op) => op.mutate(...mutations)) | ||
| return this | ||
| } | ||
|
|
||
| check(...checks: Deno.AtomicCheck[]) { | ||
| this.addMutation((op) => op.check(...checks)) | ||
| return this | ||
| } | ||
|
|
||
| sum(key: Deno.KvKey, n: bigint) { | ||
| this.addMutation((op) => op.sum(key, n)) | ||
| return this | ||
| } | ||
|
|
||
| max(key: Deno.KvKey, n: bigint) { | ||
| this.addMutation((op) => op.max(key, n)) | ||
| return this | ||
| } | ||
|
|
||
| min(key: Deno.KvKey, n: bigint): this { | ||
| this.addMutation((op) => op.min(key, n)) | ||
| return this | ||
| } | ||
|
|
||
| enqueue( | ||
| value: unknown, | ||
| options?: { | ||
| delay?: number | undefined | ||
| keysIfUndelivered?: Deno.KvKey[] | undefined | ||
| } | undefined, | ||
| ) { | ||
| this.addMutation((op) => op.enqueue(value, options)) | ||
| return this | ||
| } | ||
|
|
||
| async commit(): Promise<Deno.KvCommitResult | Deno.KvCommitError> { | ||
| // Add curent operation to atomics list | ||
| this.atomics.push(this.current) | ||
|
|
||
| // Commit all operations | ||
| const settled = await Promise.allSettled( | ||
| this.atomics.map((op) => op.commit()), | ||
| ) | ||
|
|
||
| // Check status of all commits | ||
| const success = settled.every((v) => v.status === "fulfilled") | ||
|
|
||
| // If successful, return commit result | ||
| if (success) { | ||
| return { | ||
| ok: true, | ||
| versionstamp: "0", | ||
| } | ||
| } | ||
|
|
||
| // Return commit error | ||
| return { | ||
| ok: false, | ||
| } | ||
| } | ||
|
|
||
| /** PRIVATE METHODS */ | ||
|
|
||
| /** | ||
| * Add an atomic mutation within a batched operation. | ||
| * | ||
| * @param mutation - Atomic mutation. | ||
| */ | ||
| private addMutation( | ||
| mutation: (op: Deno.AtomicOperation) => Deno.AtomicOperation, | ||
| ) { | ||
| // Add atomic mutation and increment count | ||
| this.current = mutation(this.current) | ||
| this.count++ | ||
|
|
||
| // Add current operation to atomics list if batch size is reached, reset current and count | ||
| if (this.count % this.atomicBatchSize === this.atomicBatchSize - 1) { | ||
| this.atomics.push(this.current) | ||
| this.current = this.kv.atomic() | ||
| } | ||
| } | ||
| } |
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