Repo brief: jankotek/mapdb

Generated by RepoPilot · document generated 2026-09-13 · concise human review Evidence snapshot · analyzed 2026-09-13T04:45:11.800Z · commit 8721c0e824d8

Verdict

Mixed — Stale — last commit 2y ago

• 3 active contributors
• Apache-2.0 licensed
• CI configured
• Tests present

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests

What it is

MapDB is an embedded Java database engine that provides concurrent Maps, Sets, and Queues backed by disk storage or off-heap memory. It combines traditional collections API with persistent storage, supporting features like transactions, MVCC, incremental backups, and compression—allowing Java applications to efficiently handle data that exceeds heap memory without GC pressure. Modular package structure under src/main/java/org/mapdb/: core engine in db/ (DB.java), serialization layer in ser/ with specialized serializers (ArrayDeltaSerializer, BigDecimalSerializer), I/O abstraction in io/ (DataInput2, DataOutput2 with ByteBuffer and ByteArray implementations), collections in list/…

Start here

Open these first:

• src/main/java/org/mapdb/db/DB.java — Core database interface and entry point; all data access flows through this class
• src/main/java/org/mapdb/store/Store.java — Abstract storage layer defining read/write contracts for all storage backends (heap, file, off-heap)
• src/main/java/org/mapdb/ser/Serializer.java — Serialization abstraction used across all data structures; custom serializers are built on this interface
• src/main/java/org/mapdb/io/DataIO.java — Low-level I/O utilities for reading/writing binary data; foundation for all persistence
• build.gradle — Build configuration with Kotlin code generation tasks (GenMarkers, GenRecords) that drive codebase structure

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

git clone https://github.com/jankotek/mapdb.git
cd mapdb
./gradlew build
# For full test suite (hours/days):
./gradlew test -Dmdbtest=1 -DtestArgLine="-Xmx3G" -DtestThreadCount=3

Daily commands:

Development workflow: ./gradlew build (quick build, 10 min), or ./gradlew test -Dmdbtest=1 for full suite. For memory-constrained CI: ./gradlew test -DtestReuseForks=false to reduce parallelism. No server—this is…

…shortened for this brief.

Key cautions & unknowns

• Stale — last commit 2y ago
• Small team — 3 contributors active in recent commits
• Single-maintainer risk — top contributor 98% of recent commits
• Code generation required: buildSrc/ runs during build; failing to run gradle build before importing into IDE will leave generated sources in srcGen/ missing. Test scalability: Default test runs ~10 min;…
• Published-advisory coverage was unavailable for the captured dependencies.
• Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

• Repository source
• Open issues
• Recent pull requests

Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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