Package org.mariadb.jdbc.internal.failover.impl

Class MastersReplicasListener

java.lang.Object

org.mariadb.jdbc.internal.failover.AbstractMastersListener

org.mariadb.jdbc.internal.failover.AbstractMastersReplicasListener

org.mariadb.jdbc.internal.failover.impl.MastersReplicasListener

All Implemented Interfaces:

Listener

Direct Known Subclasses:

AuroraListener

public class MastersReplicasListener
extends AbstractMastersReplicasListener

this class handle the operation when multiple hosts.

Field Summary

Fields

Modifier and Type	Field	Description
private static DynamicSizedSchedulerInterface	dynamicSizedScheduler
protected java.util.List<HostAddress>	hostAddresses
private static java.util.concurrent.atomic.AtomicInteger	listenerCount
private static Logger	logger
protected Protocol	masterProtocol
protected Protocol	secondaryProtocol

Fields inherited from class org.mariadb.jdbc.internal.failover.AbstractMastersReplicasListener

waitNewMasterProtocol, waitNewSecondaryProtocol

Fields inherited from class org.mariadb.jdbc.internal.failover.AbstractMastersListener

currentConnectionAttempts, currentProtocol, currentReadOnlyAsked, explicitClosed, globalInfo, lastQueryNanos, lastRetry, proxy, urlParser

Constructor Summary

Constructors

Constructor	Description
MastersReplicasListener(UrlParser urlParser, GlobalStateInfo globalInfo)	Initialisation.

Method Summary

Modifier and Type	Method	Description
private void	blackListAndCloseConnection(Protocol protocol)
protected void	checkInitialConnection(java.sql.SQLException queryException)
boolean	checkMasterStatus(SearchFilter searchFilter)	Check master status.
void	checkWaitingConnection()	Verify that there is waiting connection that have to replace failing one.
java.util.List<HostAddress>	connectedHosts()	List current connected HostAddress.
void	foundActiveMaster(Protocol newMasterProtocol)	Method called when a new Master connection is found after a fallback.
void	foundActiveSecondary(Protocol newSecondaryProtocol)	Method called when a new secondary connection is found after a fallback.
java.lang.String	getCatalog()
int	getMajorServerVersion()
long	getServerThreadId()	Get current connection server id.
int	getTimeout()	Get timeout (master connection possibly down).
void	handleFailLoop()
void	initializeConnection()	Initialize connections.
boolean	inTransaction()	Indicate if connection has an active transaction.
java.lang.Object	invoke(java.lang.reflect.Method method, java.lang.Object[] args)
boolean	isClosed()
boolean	isMasterConnected()
boolean	isMasterConnection()
boolean	isServerMariaDb()
boolean	isValid(int timeout)
private static void	loadScheduler()
void	lockAndSwitchMaster(Protocol newMasterProtocol)	Use the parameter newMasterProtocol as new current master connection.
void	lockAndSwitchSecondary(Protocol newSecondaryProtocol)	Use the parameter newSecondaryProtocol as new current secondary connection.
boolean	noBackslashEscapes()
private boolean	pingSecondaryProtocol(Protocol protocol)	Ping secondary protocol.
void	preAbort()
void	preClose()	Called after a call on Connection.close().
void	preExecute()
HandleErrorResult	primaryFail(java.lang.reflect.Method method, java.lang.Object[] args, boolean killCmd, boolean isClosed)	To handle the newly detected failover on the master connection.
void	prolog(long maxRows, MariaDbConnection connection, MariaDbStatement statement)
void	reconnect()	Reconnect failed connection.
void	reconnectFailedConnection(SearchFilter searchFilter)	Loop to connect.
protected void	removeListenerFromSchedulers()
void	rePrepareOnReplica(ServerPrepareResult oldServerPrepareResult, boolean mustBeOnMaster)
void	reset()	Reset state of master and replica connection.
HandleErrorResult	secondaryFail(java.lang.reflect.Method method, java.lang.Object[] args, boolean killCmd)	To handle the newly detected failover on the secondary connection.
boolean	sessionStateAware()
void	switchReadOnlyConnection(java.lang.Boolean mustBeReadOnly)	Switch to a read-only(secondary) or read and write connection(master).
boolean	versionGreaterOrEqual(int major, int minor, int patch)

Methods inherited from class org.mariadb.jdbc.internal.failover.AbstractMastersReplicasListener

getFilterForFailedHost, getSecondaryHostFailNanos, handleFailover, hasHostFail, isMasterHostFailReconnect, isSecondaryHostFail, isSecondaryHostFailReconnect, resetMasterFailoverData, resetSecondaryFailoverData, setSecondaryHostFail

Methods inherited from class org.mariadb.jdbc.internal.failover.AbstractMastersListener

abortConnection, addToBlacklist, canRetryFailLoop, clearBlacklist, closeConnection, getBlacklistKeys, getCurrentProtocol, getLastQueryNanos, getMasterHostFailNanos, getProxy, getRetriesAllDown, getUrlParser, invoke, isAutoReconnect, isExplicitClosed, isMasterHostFail, isQueryRelaunchable, isReadOnly, pingMasterProtocol, preAutoReconnect, relaunchOperation, removeFromBlacklist, resetOldsBlackListHosts, setMasterHostFail, setProxy, setSessionReadOnly, syncConnection, throwFailoverMessage

Methods inherited from class java.lang.Object

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

Field Detail

listenerCount

private static final java.util.concurrent.atomic.AtomicInteger listenerCount

logger

private static final Logger logger

dynamicSizedScheduler

private static DynamicSizedSchedulerInterface dynamicSizedScheduler

masterProtocol

protected Protocol masterProtocol

secondaryProtocol

protected Protocol secondaryProtocol

hostAddresses

protected java.util.List<HostAddress> hostAddresses

Constructor Detail

MastersReplicasListener

public MastersReplicasListener(UrlParser urlParser,
                               GlobalStateInfo globalInfo)

Initialisation.

Parameters:

urlParser - connection string object.

globalInfo - server global variables information

Method Detail

loadScheduler

private static void loadScheduler()

removeListenerFromSchedulers

protected void removeListenerFromSchedulers()

Overrides:

removeListenerFromSchedulers in class AbstractMastersListener

initializeConnection

public void initializeConnection()
                          throws java.sql.SQLException

Initialize connections.

Specified by:

initializeConnection in interface Listener

Overrides:

initializeConnection in class AbstractMastersListener

Throws:

java.sql.SQLException - if a connection error append.

isClosed

public boolean isClosed()

Specified by:

isClosed in interface Listener

Overrides:

isClosed in class AbstractMastersListener

invoke

public java.lang.Object invoke(java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

Specified by:

invoke in interface Listener

Overrides:

invoke in class AbstractMastersListener

Throws:

java.lang.Throwable

versionGreaterOrEqual

public boolean versionGreaterOrEqual(int major,
                                     int minor,
                                     int patch)

Specified by:

versionGreaterOrEqual in interface Listener

Overrides:

versionGreaterOrEqual in class AbstractMastersListener

isServerMariaDb

public boolean isServerMariaDb()

Specified by:

isServerMariaDb in interface Listener

Overrides:

isServerMariaDb in class AbstractMastersListener

sessionStateAware

public boolean sessionStateAware()

Specified by:

sessionStateAware in interface Listener

Overrides:

sessionStateAware in class AbstractMastersListener

getCatalog

public java.lang.String getCatalog()
                            throws java.sql.SQLException

Specified by:

getCatalog in interface Listener

Overrides:

getCatalog in class AbstractMastersListener

Throws:

java.sql.SQLException

getMajorServerVersion

public int getMajorServerVersion()

Specified by:

getMajorServerVersion in interface Listener

Overrides:

getMajorServerVersion in class AbstractMastersListener

isMasterConnection

public boolean isMasterConnection()

Specified by:

isMasterConnection in interface Listener

Overrides:

isMasterConnection in class AbstractMastersListener

getTimeout

public int getTimeout()
               throws java.net.SocketException

Get timeout (master connection possibly down).

Specified by:

getTimeout in interface Listener

Overrides:

getTimeout in class AbstractMastersListener

Returns:

socket timeout in ms

Throws:

java.net.SocketException - if socket exception

prolog

public void prolog(long maxRows,
                   MariaDbConnection connection,
                   MariaDbStatement statement)
            throws java.sql.SQLException

Specified by:

prolog in interface Listener

Overrides:

prolog in class AbstractMastersListener

Throws:

java.sql.SQLException

noBackslashEscapes

public boolean noBackslashEscapes()

Specified by:

noBackslashEscapes in interface Listener

Overrides:

noBackslashEscapes in class AbstractMastersListener

getServerThreadId

public long getServerThreadId()

Get current connection server id.

Returns:

server id.

checkInitialConnection

protected void checkInitialConnection(java.sql.SQLException queryException)
                               throws java.sql.SQLException

Throws:

java.sql.SQLException

preClose

public void preClose()

Called after a call on Connection.close(). Will explicitly closed all connections.

Specified by:

preClose in interface Listener

Specified by:

preClose in class AbstractMastersListener

preAbort

public void preAbort()

preExecute

public void preExecute()
                throws java.sql.SQLException

Specified by:

preExecute in interface Listener

Specified by:

preExecute in class AbstractMastersListener

Throws:

java.sql.SQLException

isValid

public boolean isValid(int timeout)
                throws java.sql.SQLException

Specified by:

isValid in interface Listener

Overrides:

isValid in class AbstractMastersListener

Throws:

java.sql.SQLException

checkWaitingConnection

public void checkWaitingConnection()
                            throws java.sql.SQLException

Verify that there is waiting connection that have to replace failing one. If there is replace failed connection with new one.

Throws:

java.sql.SQLException - if error occur

reconnectFailedConnection

public void reconnectFailedConnection(SearchFilter searchFilter)
                               throws java.sql.SQLException

Loop to connect.

Specified by:

reconnectFailedConnection in interface Listener

Specified by:

reconnectFailedConnection in class AbstractMastersListener

Throws:

java.sql.SQLException - if there is any error during reconnection

foundActiveMaster

public void foundActiveMaster(Protocol newMasterProtocol)

Method called when a new Master connection is found after a fallback.

Parameters:

newMasterProtocol - the new active connection

lockAndSwitchMaster

public void lockAndSwitchMaster(Protocol newMasterProtocol)
                         throws ReconnectDuringTransactionException

Use the parameter newMasterProtocol as new current master connection.

Lock must be set

Parameters:

newMasterProtocol - new master connection

Throws:

ReconnectDuringTransactionException - if there was an active transaction.

foundActiveSecondary

public void foundActiveSecondary(Protocol newSecondaryProtocol)
                          throws java.sql.SQLException

Method called when a new secondary connection is found after a fallback.

Specified by:

foundActiveSecondary in class AbstractMastersReplicasListener

Parameters:

newSecondaryProtocol - the new active connection

Throws:

java.sql.SQLException - if switch failed

lockAndSwitchSecondary

public void lockAndSwitchSecondary(Protocol newSecondaryProtocol)
                            throws java.sql.SQLException

Use the parameter newSecondaryProtocol as new current secondary connection.

Parameters:

newSecondaryProtocol - new secondary connection

Throws:

java.sql.SQLException - if an error occur during setting session read-only

switchReadOnlyConnection

public void switchReadOnlyConnection(java.lang.Boolean mustBeReadOnly)
                              throws java.sql.SQLException

Switch to a read-only(secondary) or read and write connection(master).

Specified by:

switchReadOnlyConnection in interface Listener

Specified by:

switchReadOnlyConnection in class AbstractMastersListener

Parameters:

mustBeReadOnly - the read-only status asked

Throws:

java.sql.SQLException - if operation hasn't change protocol

primaryFail

public HandleErrorResult primaryFail(java.lang.reflect.Method method,
                                     java.lang.Object[] args,
                                     boolean killCmd,
                                     boolean isClosed)

To handle the newly detected failover on the master connection.

Specified by:

primaryFail in interface Listener

Specified by:

primaryFail in class AbstractMastersListener

Parameters:

method - the initial called method

args - the initial args

killCmd - is the fail due to a KILL cmd

Returns:

an object to indicate if the previous Exception must be thrown, or the object resulting if a failover worked

blackListAndCloseConnection

private void blackListAndCloseConnection(Protocol protocol)

reconnect

public void reconnect()
               throws java.sql.SQLException

Reconnect failed connection.

Specified by:

reconnect in interface Listener

Specified by:

reconnect in class AbstractMastersListener

Throws:

java.sql.SQLException - if reconnection has failed

pingSecondaryProtocol

private boolean pingSecondaryProtocol(Protocol protocol)

Ping secondary protocol. ! lock must be set !

Parameters:

protocol - socket to ping

Returns:

true if ping is valid.

secondaryFail

public HandleErrorResult secondaryFail(java.lang.reflect.Method method,
                                       java.lang.Object[] args,
                                       boolean killCmd)
                                throws java.sql.SQLException

To handle the newly detected failover on the secondary connection.

Specified by:

secondaryFail in class AbstractMastersReplicasListener

Parameters:

method - the initial called method

args - the initial args

killCmd - is fail due to a KILL command

Returns:

an object to indicate if the previous Exception must be thrown, or the object resulting if a failover worked

Throws:

java.sql.SQLException - if relaunch operation fails

handleFailLoop

public void handleFailLoop()

Specified by:

handleFailLoop in class AbstractMastersListener

isMasterConnected

public boolean isMasterConnected()

inTransaction

public boolean inTransaction()

Indicate if connection has an active transaction.

Specified by:

inTransaction in interface Listener

Overrides:

inTransaction in class AbstractMastersListener

Returns:

boolean

checkMasterStatus

public boolean checkMasterStatus(SearchFilter searchFilter)

Check master status.

Specified by:

checkMasterStatus in interface Listener

Specified by:

checkMasterStatus in class AbstractMastersListener

Parameters:

searchFilter - search filter

Returns:

has some status changed

rePrepareOnReplica

public void rePrepareOnReplica(ServerPrepareResult oldServerPrepareResult,
                               boolean mustBeOnMaster)
                        throws java.sql.SQLException

Throws:

java.sql.SQLException

connectedHosts

public java.util.List<HostAddress> connectedHosts()

List current connected HostAddress.

Returns:

hostAddress List.

reset

public void reset()
           throws java.sql.SQLException

Reset state of master and replica connection.

Throws:

java.sql.SQLException - if command fail.