me.prettyprint.cassandra.connection

Class HConnectionManager

java.lang.Object

me.prettyprint.cassandra.connection.HConnectionManager

public class HConnectionManager
extends Object

Constructor Summary

Constructors

Constructor and Description
HConnectionManager(String clusterName, CassandraHostConfigurator cassandraHostConfigurator)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addCassandraHost(CassandraHost cassandraHost) Returns true if the host was successfully added.
void	addListener(String listenerName, ConnectionManagerListener listener) adds a listener in order to execute some operations when a status of a host changes
long	createClock()
void	doAddNodes()
Collection<HClientPool>	getActivePools()
String	getClusterName()
Set<CassandraHost>	getDownedHosts()
Set<CassandraHost>	getHosts()
List<String>	getStatusPerPool()
Set<CassandraHost>	getSuspendedCassandraHosts() Returns a Set of CassandraHost which are in the suspended status
HOpTimer	getTimer()
void	operateWithFailover(Operation<?> op)
void	removeAllListeners() removes all listeners from the connectionManager
boolean	removeCassandraHost(CassandraHost cassandraHost) Remove the CassandraHost from the pool, bypassing retry service.
void	removeListener(String listenerName) removes a listener from the connectionManager
void	setCassandraHostRetryDelay(int retryDelay)
void	setTimer(HOpTimer timer)
void	shutdown()
boolean	suspendCassandraHost(CassandraHost cassandraHost) Remove the HClientPool referenced by the CassandraHost from the active host pools.
boolean	unsuspendCassandraHost(CassandraHost cassandraHost) The opposite of suspendCassandraHost, places the pool back into selection

Methods inherited from class java.lang.Object

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

Constructor Detail

HConnectionManager

public HConnectionManager(String clusterName,
                  CassandraHostConfigurator cassandraHostConfigurator)

Method Detail

doAddNodes

public void doAddNodes()

addCassandraHost

public boolean addCassandraHost(CassandraHost cassandraHost)

Returns true if the host was successfully added. In any sort of failure exceptions are caught and logged, returning false.

Parameters:

cassandraHost -

Returns:

removeCassandraHost

public boolean removeCassandraHost(CassandraHost cassandraHost)

Remove the CassandraHost from the pool, bypassing retry service. This would be called on a host that is known to be going away. Gracefully shuts down the underlying connections via HClientPool.shutdown(). This method will also:

• shutdown pools in the suspended state, removing them from the underlying suspended map.
• remove hosts from CassandraHostRetryService if contained therein

Parameters:

cassandraHost -

suspendCassandraHost

public boolean suspendCassandraHost(CassandraHost cassandraHost)

Remove the HClientPool referenced by the CassandraHost from the active host pools. This does not shut down the pool, only removes it as a candidate from future operations.

Parameters:

cassandraHost -

Returns:

true if the operation was successful.

unsuspendCassandraHost

public boolean unsuspendCassandraHost(CassandraHost cassandraHost)

The opposite of suspendCassandraHost, places the pool back into selection

Parameters:

cassandraHost -

Returns:

true if this operation was successful. A no-op returning false if there was no such host in the underlying suspendedHostPool map.

getSuspendedCassandraHosts

public Set<CassandraHost> getSuspendedCassandraHosts()

Returns a Set of CassandraHost which are in the suspended status

Returns:

getHosts

public Set<CassandraHost> getHosts()

getStatusPerPool

public List<String> getStatusPerPool()

operateWithFailover

public void operateWithFailover(Operation<?> op)
                         throws HectorException

Throws:

HectorException

getTimer

public HOpTimer getTimer()

setTimer

public void setTimer(HOpTimer timer)

addListener

public void addListener(String listenerName,
               ConnectionManagerListener listener)

adds a listener in order to execute some operations when a status of a host changes

Parameters:

listenerName - - a name identifier for the listener

listener - - a ConnectionManagerListener listener

removeListener

public void removeListener(String listenerName)

removes a listener from the connectionManager

Parameters:

listenerName - - the name of the listener to remove

removeAllListeners

public void removeAllListeners()

removes all listeners from the connectionManager

getDownedHosts

public Set<CassandraHost> getDownedHosts()

getActivePools

public Collection<HClientPool> getActivePools()

createClock

public long createClock()

getClusterName

public String getClusterName()

shutdown

public void shutdown()

setCassandraHostRetryDelay

public void setCassandraHostRetryDelay(int retryDelay)