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Fixing an issue where periodically the cache state of the couch revision gets out of sync and need to update it for cache to be able to write again.

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mike12345567 2022-06-24 17:41:17 +01:00
parent a6537c3e0f
commit 0bf9072cd1
1 changed files with 10 additions and 3 deletions
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13
packages/backend-core/src/cache/writethrough.ts vendored
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@ -36,18 +36,25 @@ export async function put(
const updateDb = !cacheItem || cacheItem.lastWrite < Date.now() - writeRateMs
let output = doc
if (updateDb) {
try {
const writeDb = async (toWrite: any) => {
// doc should contain the _id and _rev
const response = await db.put(doc)
const response = await db.put(toWrite)
output = {
...doc,
_id: response.id,
_rev: response.rev,
}
}
try {
await writeDb(doc)
} catch (err: any) {
// ignore 409s, some other high speed write has hit it first, just move straight to caching
if (err.status !== 409) {
throw err
} else {
// get the rev, update over it - this is risky, may change in future
const readDoc = await db.get(doc._id)
doc._rev = readDoc._rev
await writeDb(doc)
}
}
}