57f2a00c6f
Summary: Within this commit a new AbstractLogger was introduced which allows to handle log messages at an application level. Log messages are passed up to Java using a JNI callback. This allows a Java-Developer to use common Java APIs for log messages e.g. SLF4J, LOG4J, etc. Within this commit no new dependencies were introduced, which keeps the RocksDB API clean and doesn`t force a developer to use a predefined high-level Java API. Another feature is to dynamically set a custom loggers verbosity at runtime using its public method `setInfoLogLevel` and to retrieve the currently active level using the `infoLogLevel` method. Test Plan: make clean jclean rocksdbjava jtest mvn -f rocksjni.pom package Reviewers: adamretter, ankgup87, yhchiang Subscribers: dhruba Differential Revision: https://reviews.facebook.net/D34755
RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)
This code is a library that forms the core building block for a fast key value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it specially suitable for storing multiple terabytes of data in a single database.
Start with example usage here: https://github.com/facebook/rocksdb/tree/master/examples
See the github wiki for more explanation.
The public interface is in include/. Callers should not include or
rely on the details of any other header files in this package. Those
internal APIs may be changed without warning.
Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/