Lightning Memory-Mapped Database (LMDB) wrappers for Java.

• Bundled LMDB binaries for Mac OSX x86_64 and Linux x86_64 (you can also provide your own)
• JNR based wrappers for most of the LMDB API
• Implementation of a Java ConcurrentNavigableMap backed by LMDB.
• A MultiMap implementation allowing multiple values per key

TODO

LMDB-JE comes bundled with LMDB binaries for Mac OSX x86_64 and Linux x86_64 that have been compiled with "-DMDB_MAXKEYSIZE=0". If you are using a different OS/CPU combo then you can provide your own LMDB library by specifying either an environment variable (LMDB_LIB_PATH) or a Java System Property (lmdb_lib_path) that points to the LMDB library (e.g. /path/to/liblmdb.so).

CPPFLAGS="-DMDB_MAXKEYSIZE=0" make

Linux, and Windows Libaries are built using: dockcross

Helper runtime scripts were created via:

docker run --rm dockcross/linux-x64 > ./dockcross-linux-x64
chmod +x ./dockcross-linux-x64
docker run --rm dockcross/linux-arm64 > ./dockcross-linux-arm64
chmod +x ./dockcross-linux-arm64
docker run --rm dockcross/windows-static-x64 > ./dockcross-windows-static-x64
chmod +x ./dockcross-windows-static-x64

To rebuild the native lmdb libraries (from OSX) simply run make all from the top level project directory. This does:

1. Checks out the current liblmdb sources from https://github.com/lmdb/lmdb
2. Runs make CPP_FLAGS="-DMDB_MAXKEYSIZE=0" -e clean all for Linux, OSX, and Windows
3. Copies the resulting liblmdb.so to the appropriate src/main/resources/lmdb-je/[platform]_x86_64 folder.

Tim Underwood (GitHub, LinkedIn, Twitter, Google Plus)

• LMDB-JE - Copyright Eluvio
• LMDB - Copyright Howard Chu, Symas Corp.

• LMDB-JE is licensed under: Apache License, Version 2.0
• LMDB is licensed under the OpenLDAP License