org.postgresql.quickautobalance

Class DataNode

java.lang.Object

org.postgresql.quickautobalance.DataNode

public class DataNode
extends Object

Datanode.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DataNode.CheckDnStateResult The result of checking dn state.

Constructor Summary

Constructors

Constructor and Description
DataNode(HostSpec hostSpec)

Method Summary

Modifier and Type	Method and Description
int	checkConnectionsValidity() Check cached connections validity, and remove invalid connections.
boolean	checkDnState(Properties properties) check a dn of the cluster if valid,
DataNode.CheckDnStateResult	checkDnStateAndProperties(Properties properties) Check dn state and the validity of properties.
int	clearCachedConnections() Close cached connections, and clear cachedConnectionList.
boolean	closeConnection(PgConnection pgConnection) Close connection.
int	decrementCachedCreatingConnectionSize() decrement cachedCreatingConnectionSize
boolean	equals(Object obj)
List<ConnectionInfo>	filterIdleConnections(long quickAutoBalanceStartTime) Filter idle connections from cachedConnectionsList.
int	getCachedConnectionListSize() Get the size of cachedConnectionList.
int	getCachedCreatingConnectionSize() get cachedCreatingConnectionSize
ConnectionInfo	getConnectionInfo(PgConnection pgConnection) Get connection info if the connection exits.
boolean	getDataNodeState()
int	hashCode()
int	incrementCachedCreatingConnectionSize() increment cachedCreatingConnectionSize
void	setConnection(PgConnection pgConnection, Properties properties, HostSpec hostSpec) Set connection.
void	setConnectionState(PgConnection pgConnection, StatementCancelState state) Set connection state.
void	setDataNodeState(boolean isDnValid)

Methods inherited from class java.lang.Object

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

Constructor Detail

DataNode

public DataNode(HostSpec hostSpec)

Method Detail

setConnectionState

public void setConnectionState(PgConnection pgConnection,
                               StatementCancelState state)

Set connection state.

Parameters:

pgConnection - pgConnection

state - state

setConnection

public void setConnection(PgConnection pgConnection,
                          Properties properties,
                          HostSpec hostSpec)
                   throws PSQLException

Set connection.

Parameters:

pgConnection - pgConnection

properties - properties

hostSpec - hostSpec

Throws:

PSQLException

getConnectionInfo

public ConnectionInfo getConnectionInfo(PgConnection pgConnection)

Get connection info if the connection exits.

Parameters:

pgConnection - pgConnection

Returns:

connectionInfo

getCachedConnectionListSize

public int getCachedConnectionListSize()

Get the size of cachedConnectionList.

Returns:

size of cachedConnectionList

checkDnStateAndProperties

public DataNode.CheckDnStateResult checkDnStateAndProperties(Properties properties)

Check dn state and the validity of properties.

Parameters:

properties - properties

Returns:

result (dnValid, dnInvalid, propertiesInvalid)

filterIdleConnections

public List<ConnectionInfo> filterIdleConnections(long quickAutoBalanceStartTime)

Filter idle connections from cachedConnectionsList.

Parameters:

quickAutoBalanceStartTime - the time since the start of quickAutoBalance

Returns:

idle Connection list

setDataNodeState

public void setDataNodeState(boolean isDnValid)

getDataNodeState

public boolean getDataNodeState()

checkDnState

public boolean checkDnState(Properties properties)
                     throws PSQLException,
                            InvocationTargetException

check a dn of the cluster if valid,

Parameters:

properties - properties

Returns:

if the dn is valid.

Throws:

PSQLException - psql exception

InvocationTargetException - invocation target exception

checkConnectionsValidity

public int checkConnectionsValidity()

Check cached connections validity, and remove invalid connections.

Returns:

the amount of removed connections.

clearCachedConnections

public int clearCachedConnections()

Close cached connections, and clear cachedConnectionList. JDBC execute clearCachedConnections when jdbc find an invalid datanode.

Returns:

size of cachedConnectionList before cleared

closeConnection

public boolean closeConnection(PgConnection pgConnection)

Close connection.

Parameters:

pgConnection - pgConnection

Returns:

if closed

getCachedCreatingConnectionSize

public int getCachedCreatingConnectionSize()

get cachedCreatingConnectionSize

Returns:

cachedCreatingConnectionSize

incrementCachedCreatingConnectionSize

public int incrementCachedCreatingConnectionSize()

increment cachedCreatingConnectionSize

Returns:

cachedCreatingConnectionSize after updated

decrementCachedCreatingConnectionSize

public int decrementCachedCreatingConnectionSize()

decrement cachedCreatingConnectionSize

Returns:

cachedCreatingConnectionSize after updated

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object