org.apache.curator.test

Class TestingCluster

java.lang.Object

org.apache.curator.test.TestingCluster

All Implemented Interfaces:

Closeable, AutoCloseable

public class TestingCluster
extends Object
implements Closeable

manages an internally running ensemble of ZooKeeper servers. FOR TESTING PURPOSES ONLY

Constructor Summary

Constructors

Constructor and Description
TestingCluster(Collection<InstanceSpec> specs) Creates an ensemble using the given server specs
TestingCluster(InstanceSpec... specs) Creates an ensemble using the given server specs
TestingCluster(int instanceQty) Creates an ensemble comprised of n servers.
TestingCluster(Map<InstanceSpec,Collection<InstanceSpec>> specs) Creates an ensemble using the given server specs

Method Summary

Modifier and Type	Method and Description
void	close() Shutdown the ensemble, free resources, etc.
InstanceSpec	findConnectionInstance(org.apache.zookeeper.ZooKeeper client) Given a ZooKeeper instance, returns which server it is connected to
String	getConnectString() Returns the connection string to pass to the ZooKeeper constructor
Collection<InstanceSpec>	getInstances() Returns the set of servers in the ensemble
List<TestingZooKeeperServer>	getServers()
boolean	killServer(InstanceSpec instance) Kills the given server.
boolean	restartServer(InstanceSpec instance) Restart the given server of the cluster
void	start() Start the ensemble.
void	stop() Shutdown the ensemble WITHOUT freeing resources, etc.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TestingCluster

public TestingCluster(int instanceQty)

Creates an ensemble comprised of n servers. Each server will use a temp directory and random ports

Parameters:

instanceQty - number of servers to create in the ensemble

TestingCluster

public TestingCluster(InstanceSpec... specs)

Creates an ensemble using the given server specs

Parameters:

specs - the server specs

TestingCluster

public TestingCluster(Collection<InstanceSpec> specs)

Creates an ensemble using the given server specs

Parameters:

specs - the server specs

TestingCluster

public TestingCluster(Map<InstanceSpec,Collection<InstanceSpec>> specs)

Creates an ensemble using the given server specs

Parameters:

specs - map of an instance spec to its set of quorum instances. Allows simulation of an ensemble with instances having different config peers

Method Detail

getInstances

public Collection<InstanceSpec> getInstances()

Returns the set of servers in the ensemble

Returns:

set of servers

getServers

public List<TestingZooKeeperServer> getServers()

getConnectString

public String getConnectString()

Returns the connection string to pass to the ZooKeeper constructor

Returns:

connection string

start

public void start()
           throws Exception

Start the ensemble. The cluster must be started before use.

Throws:

Exception - errors

stop

public void stop()
          throws IOException

Shutdown the ensemble WITHOUT freeing resources, etc.

Throws:

IOException

close

public void close()
           throws IOException

Shutdown the ensemble, free resources, etc. If temp directories were used, they are deleted. You should call this in a finally block.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException - errors

killServer

public boolean killServer(InstanceSpec instance)
                   throws Exception

Kills the given server. This simulates the server unexpectedly crashing

Parameters:

instance - server to kill

Returns:

true if the instance was found

Throws:

Exception - errors

restartServer

public boolean restartServer(InstanceSpec instance)
                      throws Exception

Restart the given server of the cluster

Parameters:

instance - server instance

Returns:

true of the server was found

Throws:

Exception - errors

findConnectionInstance

public InstanceSpec findConnectionInstance(org.apache.zookeeper.ZooKeeper client)
                                    throws Exception

Given a ZooKeeper instance, returns which server it is connected to

Parameters:

client - ZK instance

Returns:

the server

Throws:

Exception - errors