com.vesoft.nebula.client.graph.net

Class NebulaPool

java.lang.Object

com.vesoft.nebula.client.graph.net.NebulaPool

public class NebulaPool
extends Object

Constructor Summary

Constructors

Constructor and Description
NebulaPool()

Method Summary

Modifier and Type	Method and Description
void	close() close the pool, all connections will be closed
int	getActiveConnNum() Get the number of connections was used by users
protected SyncConnection	getConnection()
int	getIdleConnNum() Get the number of free connections in the pool
Session	getSession(String userName, String password, boolean reconnect) get a session from the NebulaPool
int	getWaitersNum() Get the number of waits in a waiting get connection
boolean	init(List<HostAddress> addresses, NebulaPoolConfig config)
protected void	returnConnection(SyncConnection connection) Return the connection to object pool
protected void	setInvalidateConnection(SyncConnection connection) Set the connection is invalidate, and the object pool will destroy it
protected void	updateServerStatus() Update the services' status when the connection is broken, it is called by Session and NebulaPool

Methods inherited from class java.lang.Object

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

Constructor Detail

NebulaPool

public NebulaPool()

Method Detail

init

public boolean init(List<HostAddress> addresses,
                    NebulaPoolConfig config)
             throws UnknownHostException,
                    InvalidConfigException

Parameters:

addresses - the graphd services addresses

config - the config for the pool

Returns:

boolean if all graph services are ok, return true, if some of them broken return false

Throws:

UnknownHostException - if host address is illegal

InvalidConfigException - if config is illegal

close

public void close()

close the pool, all connections will be closed

getSession

public Session getSession(String userName,
                          String password,
                          boolean reconnect)
                   throws NotValidConnectionException,
                          IOErrorException,
                          AuthFailedException,
                          ClientServerIncompatibleException

get a session from the NebulaPool

Parameters:

userName - the userName to authenticate with nebula-graph

password - the password to authenticate with nebula-graph

reconnect - whether to retry after the connection is disconnected

Returns:

Session

Throws:

NotValidConnectionException - if get connection failed

IOErrorException - if get unexpected exception

AuthFailedException - if authenticate failed

ClientServerIncompatibleException

getActiveConnNum

public int getActiveConnNum()

Get the number of connections was used by users

Returns:

the active connection number

getIdleConnNum

public int getIdleConnNum()

Get the number of free connections in the pool

Returns:

the idle connection number

getWaitersNum

public int getWaitersNum()

Get the number of waits in a waiting get connection

Returns:

the waiting connection number

updateServerStatus

protected void updateServerStatus()

Update the services' status when the connection is broken, it is called by Session and NebulaPool

setInvalidateConnection

protected void setInvalidateConnection(SyncConnection connection)

Set the connection is invalidate, and the object pool will destroy it

Parameters:

connection - the invalidate connection

returnConnection

protected void returnConnection(SyncConnection connection)

Return the connection to object pool

Parameters:

connection - the return connection

getConnection

protected SyncConnection getConnection()
                                throws NotValidConnectionException

Throws:

NotValidConnectionException