def get.manifest

mylsm-lsm-store@0.6.0.1 · src/ByteDurableDb.bend:1359

import Base
import mylsm-lsm-store@0.6.0.1/src/ByteMemTable.bend as ByteMemTable
import mylsm-lsm-store@0.6.0.1/src/ByteManifest.bend as ByteManifest
import mylsm-lsm-store@0.6.0.1/src/ByteManifestIo.bend as ByteManifestIo
import mylsm-lsm-store@0.6.0.1/src/DbLock.bend as DbLock
import mylsm-lsm-store@0.6.0.1/src/scan/VisibleStats.bend as VisibleStats
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes

1359def get.manifest(
1360  +path: String,
1361  lock: DbLock.Lock,
1362  key: Bytes.Bytes,
1363  table: ByteMemTable.Table,
1364  result: Result<&1, &1, ByteManifestIo.Error, ByteManifest.ManifestValue>
1365) -> IO(Handle & Result<&1, &1, Error, Maybe<&1, Bytes.Bytes>>):
1366  match result:
1367    case Fail{ByteManifestIo.Invalid{_}}:
1368      IO.pure(Handle & Result<&1, &1, Error, Maybe<&1, Bytes.Bytes>>,
1369        (Handle{path, lock, table, Open{}, VisibleStats.Stats{0n, 0n}}, Fail{Corruption{"byte manifest validation failed"}}))
1370    case Fail{ByteManifestIo.Host{code, message}}:
1371      IO.pure(Handle & Result<&1, &1, Error, Maybe<&1, Bytes.Bytes>>,
1372        (Handle{path, lock, table, Open{}, VisibleStats.Stats{0n, 0n}}, Fail{Io{code, message}}))
1373    case Done{ByteManifest.Empty{}}:
1374      get.delta(path, lock, ByteMemTable.get(table, key))
1375    case Done{ByteManifest.GenerationEmpty{}}:
1376      get.delta(path, lock, ByteMemTable.get(table, key))
1377    case Done{ByteManifest.HasSst{}}:
1378      get.sst.probe.start(path, lock, ByteMemTable.bytes.clone(key), table)
1379    case Done{ByteManifest.GenerationSst{file_id}}:
1380      get.sst.generation.path(path.clone.pair(path), file_id, lock, table, key)