Is it possible to start a zookeeper server instance in process, say for unit tests?

Question

Calling org.apache.zookeeper.server.quorum.QuorumPeerMain.main() isn\'t working.

Answer 1

Building on 1's answer by adding the use of an ephemeral port (shown by zkPort) and updated for latest ZK API:

int tickTime = 2000;
int numConnections = 5000;
String dataDirectory = System.getProperty("java.io.tmpdir");

File dir = new File(dataDirectory, "zookeeper").getAbsoluteFile();

ZooKeeperServer server = new ZooKeeperServer(dir, dir, tickTime);
standaloneServerFactory = ServerCnxnFactory.createFactory(0, numConnections);
int zkPort = standaloneServerFactory.getLocalPort();

standaloneServerFactory.startup(server);