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docs: add check to atomic op in kv example #1147

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merged 6 commits into from
Nov 19, 2024
Merged

docs: add check to atomic op in kv example #1147

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a36ea4c
fix: add `check` to atomic op + error handling
adit-bala Nov 15, 2024
fb8db49
Merge branch 'main' into main
thisisjofrank Nov 16, 2024
480d198
fix: add `versionstamp` to enforce atomicity
adit-bala Nov 19, 2024
9b4e921
Merge branch 'main' of https://github.com/adit-bala/docs
adit-bala Nov 19, 2024
509caa1
deno fmt
adit-bala Nov 19, 2024
183e811
Merge branch 'main' into main
adit-bala Nov 19, 2024
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13 changes: 10 additions & 3 deletions examples/kv.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -73,12 +73,19 @@ const aliceScoreKey = ["scores", "alice"];
await kv.set(aliceScoreKey, new Deno.KvU64(0n));

// Add 10 to the player's score in an atomic transaction
await kv.atomic()
const res = await kv.atomic()
.check({ key: aliceScoreKey, versionstamp: null }) // Check if this key has been modified since we read it
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.mutate({
type: "sum",
key: aliceScoreKey,
value: new Deno.KvU64(10n),
})
.commit();
const newScore = (await kv.get<Deno.KvU64>(aliceScoreKey)).value;
console.log("Alice's new score is: ", newScore);
// Check if the transaction was successful
if (res.ok) {
const newScore = (await kv.get<Deno.KvU64>(aliceScoreKey)).value;
console.log("Alice's new score is:", newScore);
} else {
console.error("Transaction failed ");
// Optionally, implement retry logic or handle the conflict
}
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