org.mariadb.jdbc.internal.protocol

Class AbstractQueryProtocol

java.lang.Object

org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol

org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol

All Implemented Interfaces:

Protocol

Direct Known Subclasses:

MasterProtocol

public class AbstractQueryProtocol
extends AbstractConnectProtocol
implements Protocol

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.concurrent.FutureTask	activeFutureTask
private boolean	interrupted
private java.io.InputStream	localInfileInputStream
private static java.util.Set<java.lang.Integer>	LOCK_DEADLOCK_ERROR_CODES
private static Logger	logger
private long	maxRows
private java.util.concurrent.ThreadPoolExecutor	readScheduler
private int	statementIdToRelease
private int	transactionIsolationLevel

Fields inherited from class org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol

activeStreamingResult, autoIncrementIncrement, CHECK_GALERA_STATE_QUERY, connected, database, eofDeprecated, exceptionFactory, explicitClosed, galeraAllowedStates, hasWarnings, lock, options, proxy, reader, readOnly, serverCapabilities, serverPrepareStatementCache, serverStatus, serverThreadId, socket, socketTimeout, traceCache, urlParser, writer

Constructor Summary

Constructors

Constructor and Description
AbstractQueryProtocol(UrlParser urlParser, GlobalStateInfo globalInfo, java.util.concurrent.locks.ReentrantLock lock, LruTraceCache traceCache) Get a protocol instance.

Method Summary

Modifier and Type	Method and Description
void	cancelCurrentQuery() Cancels the current query - clones the current protocol and executes a query using the new connection.
private void	checkClose()
void	closeExplicit()
private void	cmdPrologue()
private MariaDbSqlException	exceptionWithQuery(ParameterHolder[] parameters, PrepareResult serverPrepareResult, java.sql.SQLException sqlException, boolean explicitClosed)
private MariaDbSqlException	exceptionWithQuery(java.lang.String sql, java.sql.SQLException sqlException, boolean explicitClosed)
private void	executeBatch(Results results, java.util.List<java.lang.String> queries) Execute list of queries not rewritable.
private void	executeBatchAggregateSemiColon(Results results, java.util.List<java.lang.String> queries) Execute list of queries.
boolean	executeBatchClient(boolean mustExecuteOnMaster, Results results, ClientPrepareResult prepareResult, java.util.List<ParameterHolder[]> parametersList) Execute clientPrepareQuery batch.
private void	executeBatchMulti(Results results, ClientPrepareResult clientPrepareResult, java.util.List<ParameterHolder[]> parametersList) Execute clientPrepareQuery batch.
private void	executeBatchRewrite(Results results, ClientPrepareResult prepareResult, java.util.List<ParameterHolder[]> parameterList, boolean rewriteValues) Specific execution for batch rewrite that has specific query for memory.
boolean	executeBatchServer(boolean mustExecuteOnMaster, ServerPrepareResult serverPrepareResult, Results results, java.lang.String sql, java.util.List<ParameterHolder[]> parametersList) Execute Prepare if needed, and execute COM_STMT_EXECUTE queries in batch.
void	executeBatchStmt(boolean mustExecuteOnMaster, Results results, java.util.List<java.lang.String> queries) Execute batch from Statement.executeBatch().
private boolean	executeBulkBatch(Results results, java.lang.String sql, ServerPrepareResult serverPrepareResult, java.util.List<ParameterHolder[]> parametersList) Execute clientPrepareQuery batch.
void	executePreparedQuery(boolean mustExecuteOnMaster, ServerPrepareResult serverPrepareResult, Results results, ParameterHolder[] parameters) Execute a query that is already prepared.
void	executeQuery(boolean mustExecuteOnMaster, Results results, ClientPrepareResult clientPrepareResult, ParameterHolder[] parameters) Execute a unique clientPrepareQuery.
void	executeQuery(boolean mustExecuteOnMaster, Results results, ClientPrepareResult clientPrepareResult, ParameterHolder[] parameters, int queryTimeout) Execute a unique clientPrepareQuery.
void	executeQuery(boolean mustExecuteOnMaster, Results results, java.lang.String sql) Execute query directly to outputStream.
void	executeQuery(boolean mustExecuteOnMaster, Results results, java.lang.String sql, java.nio.charset.Charset charset)
void	executeQuery(java.lang.String sql) Execute internal query.
boolean	forceReleasePrepareStatement(int statementId) Force release of prepare statement that are not used.
void	forceReleaseWaitingPrepareStatement() Force release of prepare statement that are not used.
boolean	getAutocommit() Get current autocommit status.
int	getAutoIncrementIncrement() Get current auto increment increment.
java.lang.String	getCatalog()
long	getMaxRows()
void	getResult(Results results)
int	getTimeout() Returns the connection timeout in milliseconds.
int	getTransactionIsolationLevel()
java.sql.SQLException	handleIoException(java.lang.Exception initialException) Handle IoException (reconnect if Exception is due to having send too much data, making server close the connection.
private void	handleStateChange(Buffer buf, Results results)
private void	initializeBatchReader()
void	interrupt()
boolean	inTransaction()
boolean	isInterrupted()
boolean	isValid(int timeout) Check that connection is valid.
boolean	ping()
ServerPrepareResult	prepare(java.lang.String sql, boolean executeOnMaster) Prepare query on server side.
void	prolog(long maxRows, boolean hasProxy, MariaDbConnection connection, MariaDbStatement statement) Preparation before command.
void	prologProxy(ServerPrepareResult serverPrepareResult, long maxRows, boolean hasProxy, MariaDbConnection connection, MariaDbStatement statement)
ServerPrepareResult	putInCache(java.lang.String key, ServerPrepareResult serverPrepareResult)
private java.sql.SQLException	readErrorPacket(Buffer buffer, Results results) Read ERR_Packet.
private void	readLocalInfilePacket(Buffer buffer, Results results) Read Local_infile Packet.
private void	readOkPacket(Buffer buffer, Results results) Read OK_Packet.
private void	readPacket(Results results) Read server response packet.
private void	readResultSet(Buffer buffer, Results results) Read ResultSet Packet.
void	releasePrepareStatement(ServerPrepareResult serverPrepareResult) Deallocate prepare statement if not used anymore.
void	reset() Reset connection state.
void	resetDatabase()
void	resetStateAfterFailover(long maxRows, int transactionIsolationLevel, java.lang.String database, boolean autocommit) Set current state after a failover.
void	rollback() Rollback transaction.
void	setActiveFutureTask(java.util.concurrent.FutureTask activeFutureTask)
void	setCatalog(java.lang.String database)
void	setLocalInfileInputStream(java.io.InputStream inputStream)
void	setMaxRows(long max)
void	setReadonly(boolean readOnly) Puts this connection in read-only / read-write mode
void	setTimeout(int timeout) Sets the connection timeout.
void	setTransactionIsolation(int level) Set transaction isolation.
void	stopIfInterrupted() Throw TimeoutException if timeout has been reached.

Methods inherited from class org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol

abort, changeSocketSoTimeout, changeSocketTcpNoDelay, checkIfMaster, close, connect, connectWithoutProxy, destroySocket, getActiveStreamingResult, getDatabase, getHost, getHostAddress, getLock, getMajorServerVersion, getMinorServerVersion, getOptions, getPinGlobalTxToPhysicalConnection, getPort, getProxy, getReader, getReadonly, getServerThreadId, getServerVersion, getSocket, getTimeZone, getTraces, getUrlParser, getUsername, hasMoreResults, hasWarnings, isClosed, isConnected, isEofDeprecated, isExplicitClosed, isMasterConnection, isServerMariaDb, mustBeMasterConnection, noBackslashEscapes, prepareStatementCache, readEofPacket, readPipelineCheckMaster, removeActiveStreamingResult, removeHasMoreResults, sessionStateAware, setActiveStreamingResult, setHasWarnings, setHostAddress, setHostFailedWithoutProxy, setProxy, setServerStatus, shouldReconnectWithoutProxy, skip, skipEofPacket, versionGreaterOrEqual

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mariadb.jdbc.internal.protocol.Protocol

abort, changeSocketSoTimeout, changeSocketTcpNoDelay, checkIfMaster, close, connect, connectWithoutProxy, getActiveStreamingResult, getDatabase, getHost, getHostAddress, getLock, getMajorServerVersion, getMinorServerVersion, getOptions, getPinGlobalTxToPhysicalConnection, getPort, getProxy, getReader, getReadonly, getServerThreadId, getServerVersion, getSocket, getTimeZone, getTraces, getUrlParser, getUsername, hasMoreResults, hasWarnings, isClosed, isConnected, isEofDeprecated, isExplicitClosed, isMasterConnection, isServerMariaDb, mustBeMasterConnection, noBackslashEscapes, prepareStatementCache, readEofPacket, removeActiveStreamingResult, removeHasMoreResults, sessionStateAware, setActiveStreamingResult, setHasWarnings, setHostAddress, setHostFailedWithoutProxy, setProxy, setServerStatus, shouldReconnectWithoutProxy, skip, skipEofPacket, versionGreaterOrEqual

Field Detail

logger

private static final Logger logger

LOCK_DEADLOCK_ERROR_CODES

private static final java.util.Set<java.lang.Integer> LOCK_DEADLOCK_ERROR_CODES

readScheduler

private java.util.concurrent.ThreadPoolExecutor readScheduler

transactionIsolationLevel

private int transactionIsolationLevel

localInfileInputStream

private java.io.InputStream localInfileInputStream

maxRows

private long maxRows

statementIdToRelease

private volatile int statementIdToRelease

activeFutureTask

private java.util.concurrent.FutureTask activeFutureTask

interrupted

private boolean interrupted

Constructor Detail

AbstractQueryProtocol

AbstractQueryProtocol(UrlParser urlParser,
                      GlobalStateInfo globalInfo,
                      java.util.concurrent.locks.ReentrantLock lock,
                      LruTraceCache traceCache)

Get a protocol instance.

Parameters:

urlParser - connection URL information's

lock - the lock for thread synchronisation

traceCache - trace cache

Method Detail

reset

public void reset()
           throws java.sql.SQLException

Reset connection state.

1. Transaction will be rollback
2. transaction isolation will be reset
3. user variables will be removed
4. sessions variables will be reset to global values

Specified by:

reset in interface Protocol

Throws:

java.sql.SQLException - if command failed

exceptionWithQuery

private MariaDbSqlException exceptionWithQuery(ParameterHolder[] parameters,
                                               PrepareResult serverPrepareResult,
                                               java.sql.SQLException sqlException,
                                               boolean explicitClosed)

exceptionWithQuery

private MariaDbSqlException exceptionWithQuery(java.lang.String sql,
                                               java.sql.SQLException sqlException,
                                               boolean explicitClosed)

executeQuery

public void executeQuery(java.lang.String sql)
                  throws java.sql.SQLException

Execute internal query.

!! will not support multi values queries !!

Specified by:

executeQuery in interface Protocol

Specified by:

executeQuery in class AbstractConnectProtocol

Parameters:

sql - sql

Throws:

java.sql.SQLException - in any exception occur

executeQuery

public void executeQuery(boolean mustExecuteOnMaster,
                         Results results,
                         java.lang.String sql)
                  throws java.sql.SQLException

Execute query directly to outputStream.

Specified by:

executeQuery in interface Protocol

Parameters:

mustExecuteOnMaster - was intended to be launched on master connection

results - result

sql - the query to executeInternal

Throws:

java.sql.SQLException - exception

executeQuery

public void executeQuery(boolean mustExecuteOnMaster,
                         Results results,
                         java.lang.String sql,
                         java.nio.charset.Charset charset)
                  throws java.sql.SQLException

Specified by:

executeQuery in interface Protocol

Throws:

java.sql.SQLException

executeQuery

public void executeQuery(boolean mustExecuteOnMaster,
                         Results results,
                         ClientPrepareResult clientPrepareResult,
                         ParameterHolder[] parameters)
                  throws java.sql.SQLException

Execute a unique clientPrepareQuery.

Specified by:

executeQuery in interface Protocol

Parameters:

mustExecuteOnMaster - was intended to be launched on master connection

results - results

clientPrepareResult - clientPrepareResult

parameters - parameters

Throws:

java.sql.SQLException - exception

executeQuery

public void executeQuery(boolean mustExecuteOnMaster,
                         Results results,
                         ClientPrepareResult clientPrepareResult,
                         ParameterHolder[] parameters,
                         int queryTimeout)
                  throws java.sql.SQLException

Execute a unique clientPrepareQuery.

Specified by:

executeQuery in interface Protocol

Parameters:

mustExecuteOnMaster - was intended to be launched on master connection

results - results

clientPrepareResult - clientPrepareResult

parameters - parameters

queryTimeout - if timeout is set and must use max_statement_time

Throws:

java.sql.SQLException - exception

executeBatchClient

public boolean executeBatchClient(boolean mustExecuteOnMaster,
                                  Results results,
                                  ClientPrepareResult prepareResult,
                                  java.util.List<ParameterHolder[]> parametersList)
                           throws java.sql.SQLException

Execute clientPrepareQuery batch.

Specified by:

executeBatchClient in interface Protocol

Parameters:

mustExecuteOnMaster - was intended to be launched on master connection

results - results

prepareResult - ClientPrepareResult

parametersList - List of parameters

Throws:

java.sql.SQLException - exception

executeBulkBatch

private boolean executeBulkBatch(Results results,
                                 java.lang.String sql,
                                 ServerPrepareResult serverPrepareResult,
                                 java.util.List<ParameterHolder[]> parametersList)
                          throws java.sql.SQLException

Execute clientPrepareQuery batch.

Parameters:

results - results

sql - sql command

serverPrepareResult - prepare result if exist

parametersList - List of parameters

Returns:

if executed

Throws:

java.sql.SQLException - exception

initializeBatchReader

private void initializeBatchReader()

executeBatchMulti

private void executeBatchMulti(Results results,
                               ClientPrepareResult clientPrepareResult,
                               java.util.List<ParameterHolder[]> parametersList)
                        throws java.sql.SQLException

Execute clientPrepareQuery batch.

Parameters:

results - results

clientPrepareResult - ClientPrepareResult

parametersList - List of parameters

Throws:

java.sql.SQLException - exception

executeBatchStmt

public void executeBatchStmt(boolean mustExecuteOnMaster,
                             Results results,
                             java.util.List<java.lang.String> queries)
                      throws java.sql.SQLException

Execute batch from Statement.executeBatch().

Specified by:

executeBatchStmt in interface Protocol

Parameters:

mustExecuteOnMaster - was intended to be launched on master connection

results - results

queries - queries

Throws:

java.sql.SQLException - if any exception occur

executeBatch

private void executeBatch(Results results,
                          java.util.List<java.lang.String> queries)
                   throws java.sql.SQLException

Execute list of queries not rewritable.

Parameters:

results - result object

queries - list of queries

Throws:

java.sql.SQLException - exception

prepare

public ServerPrepareResult prepare(java.lang.String sql,
                                   boolean executeOnMaster)
                            throws java.sql.SQLException

Prepare query on server side. Will permit to know the parameter number of the query, and permit to send only the data on next results.

For failover, two additional information are in the result-set object : - current connection : Since server maintain a state of this prepare statement, all query will be executed on this particular connection. - executeOnMaster : state of current connection when creating this prepareStatement (if was on master, will only be executed on master. If was on a replica, can be execute temporary on master, but we keep this flag, so when a replica is connected back to relaunch this query on replica)

Specified by:

prepare in interface Protocol

Parameters:

sql - the query

executeOnMaster - state of current connection when creating this prepareStatement

Returns:

a ServerPrepareResult object that contain prepare result information.

Throws:

java.sql.SQLException - if any error occur on connection.

executeBatchAggregateSemiColon

private void executeBatchAggregateSemiColon(Results results,
                                            java.util.List<java.lang.String> queries)
                                     throws java.sql.SQLException

Execute list of queries. This method is used when using text batch statement and using rewriting (allowMultiQueries || rewriteBatchedStatements). queries will be send to server according to max_allowed_packet size.

Parameters:

results - result object

queries - list of queries

Throws:

java.sql.SQLException - exception

executeBatchRewrite

private void executeBatchRewrite(Results results,
                                 ClientPrepareResult prepareResult,
                                 java.util.List<ParameterHolder[]> parameterList,
                                 boolean rewriteValues)
                          throws java.sql.SQLException

Specific execution for batch rewrite that has specific query for memory.

Parameters:

results - result

prepareResult - prepareResult

parameterList - parameters

rewriteValues - is rewritable flag

Throws:

java.sql.SQLException - exception

executeBatchServer

public boolean executeBatchServer(boolean mustExecuteOnMaster,
                                  ServerPrepareResult serverPrepareResult,
                                  Results results,
                                  java.lang.String sql,
                                  java.util.List<ParameterHolder[]> parametersList)
                           throws java.sql.SQLException

Execute Prepare if needed, and execute COM_STMT_EXECUTE queries in batch.

Specified by:

executeBatchServer in interface Protocol

Parameters:

mustExecuteOnMaster - must normally be executed on master connection

serverPrepareResult - prepare result. can be null if not prepared.

results - execution results

sql - sql query if needed to be prepared

parametersList - parameter list

Returns:

executed

Throws:

java.sql.SQLException - if parameter error or connection error occur.

executePreparedQuery

public void executePreparedQuery(boolean mustExecuteOnMaster,
                                 ServerPrepareResult serverPrepareResult,
                                 Results results,
                                 ParameterHolder[] parameters)
                          throws java.sql.SQLException

Execute a query that is already prepared.

Specified by:

executePreparedQuery in interface Protocol

Parameters:

mustExecuteOnMaster - must execute on master

serverPrepareResult - prepare result

results - execution result

parameters - parameters

Throws:

java.sql.SQLException - exception

rollback

public void rollback()
              throws java.sql.SQLException

Rollback transaction.

Specified by:

rollback in interface Protocol

Throws:

java.sql.SQLException

forceReleasePrepareStatement

public boolean forceReleasePrepareStatement(int statementId)
                                     throws java.sql.SQLException

Force release of prepare statement that are not used. This method will be call when adding a new prepare statement in cache, so the packet can be send to server without problem.

Specified by:

forceReleasePrepareStatement in interface Protocol

Parameters:

statementId - prepared statement Id to remove.

Returns:

true if successfully released

Throws:

java.sql.SQLException - if connection exception.

forceReleaseWaitingPrepareStatement

public void forceReleaseWaitingPrepareStatement()
                                         throws java.sql.SQLException

Force release of prepare statement that are not used. This permit to deallocate a statement that cannot be release due to multi-thread use.

Specified by:

forceReleaseWaitingPrepareStatement in interface Protocol

Throws:

java.sql.SQLException - if connection occur

ping

public boolean ping()
             throws java.sql.SQLException

Specified by:

ping in interface Protocol

Throws:

java.sql.SQLException

isValid

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

Check that connection is valid. !! careful, timeout is in milliseconds, connection.isValid(timeout) is in seconds !!

Specified by:

isValid in interface Protocol

Parameters:

timeout - timeout in milliseconds

Returns:

true is valid

Throws:

java.sql.SQLException - if any error occur

getCatalog

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

Specified by:

getCatalog in interface Protocol

Throws:

java.sql.SQLException

setCatalog

public void setCatalog(java.lang.String database)
                throws java.sql.SQLException

Specified by:

setCatalog in interface Protocol

Throws:

java.sql.SQLException

resetDatabase

public void resetDatabase()
                   throws java.sql.SQLException

Specified by:

resetDatabase in interface Protocol

Throws:

java.sql.SQLException

cancelCurrentQuery

public void cancelCurrentQuery()
                        throws java.sql.SQLException

Cancels the current query - clones the current protocol and executes a query using the new connection.

Specified by:

cancelCurrentQuery in interface Protocol

Throws:

java.sql.SQLException - never thrown

getAutocommit

public boolean getAutocommit()

Get current autocommit status.

Specified by:

getAutocommit in interface Protocol

Returns:

autocommit status

inTransaction

public boolean inTransaction()

Specified by:

inTransaction in interface Protocol

closeExplicit

public void closeExplicit()

Specified by:

closeExplicit in interface Protocol

releasePrepareStatement

public void releasePrepareStatement(ServerPrepareResult serverPrepareResult)
                             throws java.sql.SQLException

Deallocate prepare statement if not used anymore.

Specified by:

releasePrepareStatement in interface Protocol

Parameters:

serverPrepareResult - allocation result

Throws:

java.sql.SQLException - if de-allocation failed.

getMaxRows

public long getMaxRows()

Specified by:

getMaxRows in interface Protocol

setMaxRows

public void setMaxRows(long max)
                throws java.sql.SQLException

Specified by:

setMaxRows in interface Protocol

Throws:

java.sql.SQLException

setLocalInfileInputStream

public void setLocalInfileInputStream(java.io.InputStream inputStream)

Specified by:

setLocalInfileInputStream in interface Protocol

getTimeout

public int getTimeout()

Returns the connection timeout in milliseconds.

Specified by:

getTimeout in interface Protocol

Returns:

the connection timeout in milliseconds.

setTimeout

public void setTimeout(int timeout)
                throws java.net.SocketException

Sets the connection timeout.

Specified by:

setTimeout in interface Protocol

Parameters:

timeout - the timeout, in milliseconds

Throws:

java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.

setReadonly

public void setReadonly(boolean readOnly)
                 throws java.sql.SQLException

Puts this connection in read-only / read-write mode

Specified by:

setReadonly in interface Protocol

Parameters:

readOnly - true enables read-only mode; false disables it

Throws:

java.sql.SQLException - If socket error.

setTransactionIsolation

public void setTransactionIsolation(int level)
                             throws java.sql.SQLException

Set transaction isolation.

Specified by:

setTransactionIsolation in interface Protocol

Parameters:

level - transaction level.

Throws:

java.sql.SQLException - if transaction level is unknown

getTransactionIsolationLevel

public int getTransactionIsolationLevel()

Specified by:

getTransactionIsolationLevel in interface Protocol

checkClose

private void checkClose()
                 throws java.sql.SQLException

Throws:

java.sql.SQLException

getResult

public void getResult(Results results)
               throws java.sql.SQLException

Specified by:

getResult in interface Protocol

Throws:

java.sql.SQLException

readPacket

private void readPacket(Results results)
                 throws java.sql.SQLException

Read server response packet.

Parameters:

results - result object

Throws:

java.sql.SQLException - if sub-result connection fail

See Also:

server response packets

readOkPacket

private void readOkPacket(Buffer buffer,
                          Results results)

Read OK_Packet.

Parameters:

buffer - current buffer

results - result object

See Also:

OK_Packet

handleStateChange

private void handleStateChange(Buffer buf,
                               Results results)

getAutoIncrementIncrement

public int getAutoIncrementIncrement()
                              throws java.sql.SQLException

Get current auto increment increment. *** no lock needed ****

Specified by:

getAutoIncrementIncrement in interface Protocol

Returns:

auto increment increment.

Throws:

java.sql.SQLException - if cannot retrieve auto increment value

readErrorPacket

private java.sql.SQLException readErrorPacket(Buffer buffer,
                                              Results results)

Read ERR_Packet.

Parameters:

buffer - current buffer

results - result object

Returns:

SQLException if sub-result connection fail

See Also:

ERR_Packet

readLocalInfilePacket

private void readLocalInfilePacket(Buffer buffer,
                                   Results results)
                            throws java.sql.SQLException

Read Local_infile Packet.

Parameters:

buffer - current buffer

results - result object

Throws:

java.sql.SQLException - if sub-result connection fail

See Also:

local_infile packet

readResultSet

private void readResultSet(Buffer buffer,
                           Results results)
                    throws java.sql.SQLException

Read ResultSet Packet.

Parameters:

buffer - current buffer

results - result object

Throws:

java.sql.SQLException - if sub-result connection fail

See Also:

resultSet packets

prologProxy

public void prologProxy(ServerPrepareResult serverPrepareResult,
                        long maxRows,
                        boolean hasProxy,
                        MariaDbConnection connection,
                        MariaDbStatement statement)
                 throws java.sql.SQLException

Specified by:

prologProxy in interface Protocol

Throws:

java.sql.SQLException

prolog

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

Preparation before command.

Specified by:

prolog in interface Protocol

Parameters:

maxRows - query max rows

hasProxy - has proxy

connection - current connection

statement - current statement

Throws:

java.sql.SQLException - if any error occur.

putInCache

public ServerPrepareResult putInCache(java.lang.String key,
                                      ServerPrepareResult serverPrepareResult)

Specified by:

putInCache in interface Protocol

cmdPrologue

private void cmdPrologue()
                  throws java.sql.SQLException

Throws:

java.sql.SQLException

resetStateAfterFailover

public void resetStateAfterFailover(long maxRows,
                                    int transactionIsolationLevel,
                                    java.lang.String database,
                                    boolean autocommit)
                             throws java.sql.SQLException

Set current state after a failover.

Specified by:

resetStateAfterFailover in interface Protocol

Parameters:

maxRows - current Max rows

transactionIsolationLevel - current transactionIsolationLevel

database - current database

autocommit - current autocommit state

Throws:

java.sql.SQLException - if any error occur.

handleIoException

public java.sql.SQLException handleIoException(java.lang.Exception initialException)

Handle IoException (reconnect if Exception is due to having send too much data, making server close the connection.

There is 3 kind of IOException :

1. MaxAllowedPacketException : without need of reconnect : thrown when driver don't send packet that would have been too big then error is not a CONNECTION_EXCEPTION
2. packets size is greater than max_allowed_packet (can be checked with writer.isAllowedCmdLength()). Need to reconnect
3. unknown IO error throw a CONNECTION_EXCEPTION

Specified by:

handleIoException in interface Protocol

Parameters:

initialException - initial Io error

Returns:

the resulting error to return to client.

setActiveFutureTask

public void setActiveFutureTask(java.util.concurrent.FutureTask activeFutureTask)

Specified by:

setActiveFutureTask in interface Protocol

interrupt

public void interrupt()

Specified by:

interrupt in interface Protocol

isInterrupted

public boolean isInterrupted()

Specified by:

isInterrupted in interface Protocol

stopIfInterrupted

public void stopIfInterrupted()
                       throws java.sql.SQLTimeoutException

Throw TimeoutException if timeout has been reached.

Specified by:

stopIfInterrupted in interface Protocol

Throws:

java.sql.SQLTimeoutException - to indicate timeout exception.