## Cross-building
RocksDB can be built as a single self contained cross-platform JAR. The cross-platform jar can be used on any 64-bit OSX system, 32-bit Linux system, or 64-bit Linux system.
Building a cross-platform JAR requires:
* [Docker](https://www.docker.com/docker-community)
* A Mac OSX machine that can compile RocksDB.
* Java 7 set as JAVA_HOME.
Once you have these items, run this make command from RocksDB's root source directory:
make jclean clean rocksdbjavastaticreleasedocker
This command will build RocksDB natively on OSX, and will then spin up docker containers to build RocksDB for 32-bit and 64-bit Linux with glibc, and 32-bit and 64-bit Linux with musl libc.
You can find all native binaries and JARs in the java/target directory upon completion:
librocksdbjni-linux32.so
librocksdbjni-linux64.so
librocksdbjni-linux64-musl.so
librocksdbjni-linux32-musl.so
librocksdbjni-osx.jnilib
rocksdbjni-x.y.z-javadoc.jar
rocksdbjni-x.y.z-linux32.jar
rocksdbjni-x.y.z-linux64.jar
rocksdbjni-x.y.z-linux64-musl.jar
rocksdbjni-x.y.z-linux32-musl.jar
rocksdbjni-x.y.z-osx.jar
rocksdbjni-x.y.z-sources.jar
rocksdbjni-x.y.z.jar
Where x.y.z is the built version number of RocksDB.
## Maven publication
Set ~/.m2/settings.xml to contain:
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<servers>
<server>
<id>sonatype-nexus-staging</id>
<username>your-sonatype-jira-username</username>
<password>your-sonatype-jira-password</password>
</server>
</servers>
</settings>
From RocksDB's root directory, first build the Java static JARs:
make jclean clean rocksdbjavastaticpublish
This command will [stage the JAR artifacts on the Sonatype staging repository](http://central.sonatype.org/pages/manual-staging-bundle-creation-and-deployment.html). To release the staged artifacts.
1. Go to [https://oss.sonatype.org/#stagingRepositories](https://oss.sonatype.org/#stagingRepositories) and search for "rocksdb" in the upper right hand search box.
2. Select the rocksdb staging repository, and inspect its contents.
3. If all is well, follow [these steps](https://oss.sonatype.org/#stagingRepositories) to close the repository and release it.
After the release has occurred, the artifacts will be synced to Maven central within 24-48 hours.