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https://github.com/status-im/nimbus-eth1.git
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5a5cc6295e
* bump rockdb * Rename `KVT` objects related to filters according to `Aristo` naming details: filter* => delta* roFilter => balancer * Compulsory error handling if `persistent()` fails * Add return code to `reCentre()` why: Might eventually fail if re-centring is blocked. Some logic will be added in subsequent patch sets. * Add column families from earlier session to rocksdb in opening procedure why: All previously used CFs must be declared when re-opening an existing database. * Update `init()` and add rocksdb `reinit()` methods for changing parameters why: Opening a set column families (with different open options) must span at least the ones that are already on disk. * Provide write-trigger-event interface into `Aristo` backend why: This allows to save data from a guest application (think `KVT`) to get synced with the write cycle so the guest and `Aristo` save all atomically. * Use `KVT` with new column family interface from `Aristo` * Remove obsolete guest interface * Implement `KVT` piggyback on `Aristo` backend * CoreDb: Add separate `KVT`/`Aristo` backend mode for debugging * Remove `rocks_db` import from `persist()` function why: Some systems (i.p `fluffy` and friends) use the `Aristo` memory backend emulation and do not link against rocksdb when building the application. So this should fix that problem.
48 lines
1.7 KiB
Nim
48 lines
1.7 KiB
Nim
# nimbus-eth1
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# Copyright (c) 2023-2024 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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import
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std/tables,
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results,
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".."/[kvt_desc, kvt_utils]
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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proc merge*(
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db: KvtDbRef; # Database
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upper: LayerDeltaRef; # Filter to apply onto `lower`
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lower: var LayerDeltaRef; # Target filter, will be modified
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) =
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## Merge the argument filter `upper` onto the argument filter `lower`
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## relative to the *unfiltered* backend database on `db.backened`. The `lower`
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## filter argument will have been modified.
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##
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## In case that the argument `lower` is `nil`, it will be replaced by `upper`.
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##
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if lower.isNil:
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lower = upper
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elif not upper.isNil:
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for (key,val) in upper.sTab.pairs:
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if val.isValid or not lower.sTab.hasKey key:
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lower.sTab[key] = val
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elif lower.sTab.getOrVoid(key).isValid:
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let rc = db.getUbe key
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if rc.isOk:
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lower.sTab[key] = val # empty blob
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else:
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doAssert rc.error == GetNotFound
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lower.sTab.del key # no need to keep that in merged filter
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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