com.mysql.cj.protocol

Interface Protocol<M extends Message>

Type Parameters:

M - Message type

public interface Protocol<M extends Message>

A protocol provides the facilities to communicate with a MySQL server.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Protocol.ProtocolEventHandler
static interface	Protocol.ProtocolEventListener

Method Summary

Modifier and Type	Method and Description
void	afterHandshake()
void	beforeHandshake()
void	changeDatabase(String database)
void	changeUser(String user, String password, String database) Re-authenticates as the given user and password
M	checkErrorMessage() Read one message from the MySQL server, checks for errors in it, and if none, returns the message, ready for reading
void	close()
void	configureTimeZone()
void	connect(String user, String password, String database) Create a new session.
AuthenticationProvider<M>	getAuthenticationProvider()
ExceptionInterceptor	getExceptionInterceptor()
InputStream	getLocalInfileInputStream() Returns the InputStream instance that will be used to send data in response to a "LOAD DATA LOCAL INFILE" statement.
MessageBuilder<M>	getMessageBuilder()
PacketReceivedTimeHolder	getPacketReceivedTimeHolder()
PacketSentTimeHolder	getPacketSentTimeHolder()
PropertySet	getPropertySet()
String	getQueryComment() Returns the comment that will be prepended to all statements sent to the server.
String	getQueryTimingUnits()
ServerSession	getServerSession()
SocketConnection	getSocketConnection()
Supplier<ValueEncoder>	getValueEncoderSupplier(Object obj)
void	init(Session session, SocketConnection socketConnection, PropertySet propertySet, TransactionEventHandler transactionManager) Init method takes the place of constructor.
void	initServerSession()
void	negotiateSSLConnection()
<T extends ProtocolEntity> T	read(Class<Resultset> requiredClass, int maxRows, boolean streamResults, M resultPacket, boolean isBinaryEncoded, ColumnDefinition metadata, ProtocolEntityFactory<T,M> protocolEntityFactory) Read protocol entity.
<T extends ProtocolEntity> T	read(Class<T> requiredClass, ProtocolEntityFactory<T,M> protocolEntityFactory)
M	readMessage(M reuse) Read one message from the MySQL server into the reusable buffer if provided or into the new one.
ColumnDefinition	readMetadata()
<T extends QueryResult> T	readQueryResult(ResultBuilder<T> resultBuilder) Read messages from server and deliver them to resultBuilder.
ServerCapabilities	readServerCapabilities() Retrieve ServerCapabilities from server.
void	reset() Return Protocol to its initial state right after successful connect.
void	send(Message message, int packetLen)
M	sendCommand(Message queryPacket, boolean skipCheck, int timeoutMillis) Send a command to the MySQL server.
void	setLocalInfileInputStream(InputStream stream) Sets an InputStream instance that will be used to send data to the MySQL server for a "LOAD DATA LOCAL INFILE" statement rather than a FileInputStream or URLInputStream that represents the path given as an argument to the statement.
void	setPacketReceivedTimeHolder(PacketReceivedTimeHolder packetReceivedTimeHolder)
void	setPacketSentTimeHolder(PacketSentTimeHolder packetSentTimeHolder)
void	setPropertySet(PropertySet propertySet)
void	setQueryComment(String comment) Sets the comment that will be prepended to all statements sent to the server.
boolean	versionMeetsMinimum(int major, int minor, int subminor)

Method Detail

init

void init(Session session,
          SocketConnection socketConnection,
          PropertySet propertySet,
          TransactionEventHandler transactionManager)

Init method takes the place of constructor. A constructor should be used unless the encapsulation of ProtocolFactory is necessary.

Parameters:

session - Session

socketConnection - SocketConnection

propertySet - PropertySet

transactionManager - TransactionEventHandler

getPropertySet

PropertySet getPropertySet()

setPropertySet

void setPropertySet(PropertySet propertySet)

getMessageBuilder

MessageBuilder<M> getMessageBuilder()

readServerCapabilities

ServerCapabilities readServerCapabilities()

Retrieve ServerCapabilities from server.

Returns:

ServerCapabilities

getServerSession

ServerSession getServerSession()

getSocketConnection

SocketConnection getSocketConnection()

getAuthenticationProvider

AuthenticationProvider<M> getAuthenticationProvider()

getExceptionInterceptor

ExceptionInterceptor getExceptionInterceptor()

getPacketSentTimeHolder

PacketSentTimeHolder getPacketSentTimeHolder()

setPacketSentTimeHolder

void setPacketSentTimeHolder(PacketSentTimeHolder packetSentTimeHolder)

getPacketReceivedTimeHolder

PacketReceivedTimeHolder getPacketReceivedTimeHolder()

setPacketReceivedTimeHolder

void setPacketReceivedTimeHolder(PacketReceivedTimeHolder packetReceivedTimeHolder)

connect

void connect(String user,
             String password,
             String database)

Create a new session. This generally happens once at the beginning of a connection.

Parameters:

user - DB user name

password - DB user password

database - database name

negotiateSSLConnection

void negotiateSSLConnection()

beforeHandshake

void beforeHandshake()

afterHandshake

void afterHandshake()

changeDatabase

void changeDatabase(String database)

changeUser

void changeUser(String user,
                String password,
                String database)

Re-authenticates as the given user and password

Parameters:

user - DB user name

password - DB user password

database - database name

versionMeetsMinimum

boolean versionMeetsMinimum(int major,
                            int minor,
                            int subminor)

readMessage

M readMessage(M reuse)

Read one message from the MySQL server into the reusable buffer if provided or into the new one.

Parameters:

reuse - Message instance to read into, may be null

Returns:

the message from the server.

checkErrorMessage

M checkErrorMessage()

Read one message from the MySQL server, checks for errors in it, and if none, returns the message, ready for reading

Returns:

a message ready for reading.

send

void send(Message message,
          int packetLen)

Parameters:

message - Message instance

packetLen - length of header + payload

readMetadata

ColumnDefinition readMetadata()

sendCommand

M sendCommand(Message queryPacket,
              boolean skipCheck,
              int timeoutMillis)

Send a command to the MySQL server.

Parameters:

queryPacket - a packet pre-loaded with data for the protocol (eg. from a client-side prepared statement). The first byte of this packet is the MySQL protocol 'command' from MysqlDefs

skipCheck - do not call checkErrorPacket() if true

timeoutMillis - timeout

Returns:

the response packet from the server

Throws:

CJException - if an I/O error or SQL error occurs

read

<T extends ProtocolEntity> T read(Class<T> requiredClass,
                                  ProtocolEntityFactory<T,M> protocolEntityFactory)
                           throws IOException

Throws:

IOException

read

<T extends ProtocolEntity> T read(Class<Resultset> requiredClass,
                                  int maxRows,
                                  boolean streamResults,
                                  M resultPacket,
                                  boolean isBinaryEncoded,
                                  ColumnDefinition metadata,
                                  ProtocolEntityFactory<T,M> protocolEntityFactory)
                           throws IOException

Read protocol entity.

Type Parameters:

T - object extending the ProtocolEntity

Parameters:

requiredClass - required Resultset class

maxRows - the maximum number of rows to read (-1 means all rows)

streamResults - should the driver leave the results on the wire, and read them only when needed?

resultPacket - the first packet of information in the result set

isBinaryEncoded - true if the binary protocol is used (for server prepared statements)

metadata - use this metadata instead of the one provided on wire

protocolEntityFactory - ProtocolEntityFactory instance

Returns:

ProtocolEntity instance

Throws:

IOException - if an error occurs

setLocalInfileInputStream

void setLocalInfileInputStream(InputStream stream)

Sets an InputStream instance that will be used to send data to the MySQL server for a "LOAD DATA LOCAL INFILE" statement rather than a FileInputStream or URLInputStream that represents the path given as an argument to the statement. This stream will be read to completion upon execution of a "LOAD DATA LOCAL INFILE" statement, and will automatically be closed by the driver, so it needs to be reset before each call to execute*() that would cause the MySQL server to request data to fulfill the request for "LOAD DATA LOCAL INFILE". If this value is set to NULL, the driver will revert to using a FileInputStream or URLInputStream as required.

Parameters:

stream - input stream

getLocalInfileInputStream

InputStream getLocalInfileInputStream()

Returns the InputStream instance that will be used to send data in response to a "LOAD DATA LOCAL INFILE" statement. This method returns NULL if no such stream has been set via setLocalInfileInputStream().

Returns:

input stream

getQueryComment

String getQueryComment()

Returns the comment that will be prepended to all statements sent to the server.

Returns:

query comment string

setQueryComment

void setQueryComment(String comment)

Sets the comment that will be prepended to all statements sent to the server. Do not use slash-star or star-slash tokens in the comment as these will be added by the driver itself.

Parameters:

comment - query comment string

readQueryResult

<T extends QueryResult> T readQueryResult(ResultBuilder<T> resultBuilder)

Read messages from server and deliver them to resultBuilder.

Type Parameters:

T - result type

Parameters:

resultBuilder - ResultBuilder instance

Returns:

QueryResult

close

void close()
    throws IOException

Throws:

IOException

configureTimeZone

void configureTimeZone()

initServerSession

void initServerSession()

reset

void reset()

Return Protocol to its initial state right after successful connect.

getQueryTimingUnits

String getQueryTimingUnits()

getValueEncoderSupplier

Supplier<ValueEncoder> getValueEncoderSupplier(Object obj)