{"id":48174360,"url":"https://github.com/lambdasistemi/rocksdb-kv-transactions","last_synced_at":"2026-04-04T17:36:30.773Z","repository":{"id":334351981,"uuid":"1141062235","full_name":"lambdasistemi/rocksdb-kv-transactions","owner":"lambdasistemi","description":"RocksDB backend for key-value transactions","archived":false,"fork":false,"pushed_at":"2026-03-18T13:01:19.000Z","size":719,"stargazers_count":0,"open_issues_count":2,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-03-19T02:56:00.181Z","etag":null,"topics":["database","haskell","rocksdb","transactions"],"latest_commit_sha":null,"homepage":null,"language":"Haskell","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"apache-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/lambdasistemi.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-01-24T07:06:41.000Z","updated_at":"2026-03-18T12:34:10.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/lambdasistemi/rocksdb-kv-transactions","commit_stats":null,"previous_names":["paolino/rocksdb-kv-transactions","lambdasistemi/rocksdb-kv-transactions"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/lambdasistemi/rocksdb-kv-transactions","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Frocksdb-kv-transactions","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Frocksdb-kv-transactions/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Frocksdb-kv-transactions/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Frocksdb-kv-transactions/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/lambdasistemi","download_url":"https://codeload.github.com/lambdasistemi/rocksdb-kv-transactions/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Frocksdb-kv-transactions/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":31407645,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-04T10:20:44.708Z","status":"ssl_error","status_checked_at":"2026-04-04T10:20:06.846Z","response_time":60,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["database","haskell","rocksdb","transactions"],"created_at":"2026-04-04T17:36:30.558Z","updated_at":"2026-04-04T17:36:30.753Z","avatar_url":"https://github.com/lambdasistemi.png","language":"Haskell","funding_links":[],"categories":[],"sub_categories":[],"readme":"# rocksdb-kv-transactions\n\nType-safe key-value transactions backed by RocksDB.\n\n[Documentation](https://paolino.github.io/rocksdb-kv-transactions/)\n\n## Overview\n\nThis library provides a transactional layer over RocksDB with:\n\n- **Type-safe columns** - Each column has its own key and value types, enforced at compile time\n- **Atomic transactions** - Buffered writes are applied atomically on commit\n- **Cursor iteration** - Range queries with forward/backward navigation\n- **Serialization via Prisms** - Flexible encoding/decoding using lens prisms\n\n## Installation\n\nAdd to your `build-depends`:\n\n```cabal\nbuild-depends:\n    rocksdb-kv-transactions\n    rocksdb-kv-transactions:kv-transactions\n```\n\n## Quick Start\n\n```haskell\n{-# LANGUAGE GADTs #-}\n\nimport Data.ByteString (ByteString)\nimport Data.Type.Equality ((:~:)(..))\nimport Database.KV.RocksDB (mkRocksDBDatabase)\nimport Database.KV.Transaction\nimport Database.RocksDB\n\n-- Define your columns as a GADT\ndata Columns c where\n    Users :: Columns (KV ByteString ByteString)\n    Posts :: Columns (KV ByteString ByteString)\n\n-- Required instances for DMap lookup\ninstance GCompare Columns where\n    gcompare Users Users = GEQ\n    gcompare Posts Posts = GEQ\n    gcompare Users Posts = GLT\n    gcompare Posts Users = GGT\n\ninstance GEq Columns where\n    geq Users Users = Just Refl\n    geq Posts Posts = Just Refl\n    geq _ _ = Nothing\n\n-- Define codecs (identity for ByteString)\ncodecs :: DMap Columns Codecs\ncodecs = fromPairList\n    [ Users :=\u003e Codecs id id\n    , Posts :=\u003e Codecs id id\n    ]\n\nmain :: IO ()\nmain = do\n    -- Open database with column families\n    withDBCF \"mydb\" cfg [(\"users\", cfg), (\"posts\", cfg)] $ \\db -\u003e do\n        let database = mkRocksDBDatabase db (mkColumns (columnFamilies db) codecs)\n\n        -- Run transactions\n        runTransactionUnguarded database $ do\n            insert Users \"user1\" \"Alice\"\n            insert Users \"user2\" \"Bob\"\n\n        -- Query data\n        result \u003c- runTransactionUnguarded database $ do\n            query Users \"user1\"\n\n        print result  -- Just \"Alice\"\n  where\n    cfg = def { createIfMissing = True }\n```\n\n## Modules\n\n### kv-transactions (sublibrary)\n\n| Module | Description |\n|--------|-------------|\n| `Database.KV.Transaction` | Core transaction monad with `query`, `insert`, `delete` |\n| `Database.KV.Database` | Abstract database interface and column definitions |\n| `Database.KV.Query` | Read-only queries (no write buffering) |\n| `Database.KV.Cursor` | Iterator-based navigation (`firstEntry`, `nextEntry`, `seekKey`) |\n\n### rocksdb-kv-transactions (main library)\n\n| Module | Description |\n|--------|-------------|\n| `Database.KV.RocksDB` | RocksDB backend implementation |\n\n## Cursor Example\n\n```haskell\n-- Iterate through all entries\nrunTransactionUnguarded database $ do\n    iterating Users $ do\n        first \u003c- firstEntry\n        second \u003c- nextEntry\n        third \u003c- nextEntry\n        pure (first, second, third)\n\n-- Seek and iterate\nrunTransactionUnguarded database $ do\n    iterating Users $ do\n        entry \u003c- seekKey \"user1\"\n        next \u003c- nextEntry\n        pure (entry, next)\n```\n\n## Concurrency\n\nFor serialized transaction execution:\n\n```haskell\nrunner \u003c- newRunTransaction database\n-- These will not run concurrently:\nforkIO $ runTransaction runner tx1\nforkIO $ runTransaction runner tx2\n```\n\n## Development\n\n```bash\n# Enter nix shell\nnix develop\n\n# Build\njust build\n\n# Run tests\njust test\n\n# Format code\njust format\n\n# Full CI\njust ci\n```\n\n## License\n\nApache-2.0\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flambdasistemi%2Frocksdb-kv-transactions","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flambdasistemi%2Frocksdb-kv-transactions","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flambdasistemi%2Frocksdb-kv-transactions/lists"}