io.lettuce.core.protocol

Class DefaultEndpoint

java.lang.Object

io.lettuce.core.protocol.DefaultEndpoint

All Implemented Interfaces:

AsyncCloseable, Endpoint, RedisChannelWriter, Closeable, AutoCloseable

Direct Known Subclasses:

PubSubEndpoint

public class DefaultEndpoint
extends Object
implements RedisChannelWriter, Endpoint

Default Endpoint implementation.

Author:

Mark Paluch

Field Summary

Fields

Modifier and Type	Field and Description
protected Channel	channel

Constructor Summary

Constructors

Constructor and Description
DefaultEndpoint(ClientOptions clientOptions, ClientResources clientResources) Create a new DefaultEndpoint.

Method Summary

Modifier and Type	Method and Description
void	close() Close the connection.
CompletableFuture<Void>	closeAsync() Asynchronously close the RedisChannelWriter.
protected <T> T	doExclusive(Supplier<T> supplier) Execute a Supplier callback guarded by an exclusive lock.
protected List<RedisCommand<?,?,?>>	drainCommands()
void	flushCommands() Flush pending commands.
ClientResources	getClientResources()
void	initialState() Reset the command-handler to the initial not-connected state.
boolean	isClosed()
protected String	logPrefix()
void	notifyChannelActive(Channel channel) Notify about channel activation.
void	notifyChannelInactive(Channel channel) Notify about channel deactivation.
void	notifyDrainQueuedCommands(io.lettuce.core.protocol.HasQueuedCommands queuedCommands) Signal the endpoint to drain queued commands from the queue holder.
void	notifyException(Throwable t) Notify about an exception occured in channel/command processing
void	registerConnectionWatchdog(ConnectionWatchdog connectionWatchdog) Associate a ConnectionWatchdog with the Endpoint.
void	reset() Reset the writer state.
void	setAutoFlushCommands(boolean autoFlush) Disable or enable auto-flush behavior.
void	setConnectionFacade(ConnectionFacade connectionFacade) Set the corresponding connection facade in order to notify it about channel active/inactive state.
<K,V> Collection<RedisCommand<K,V,?>>	write(Collection<? extends RedisCommand<K,V,?>> commands) Write multiple commands on the channel.
<K,V,T> RedisCommand<K,V,T>	write(RedisCommand<K,V,T> command) Write a command on the channel.
protected <C extends RedisCommand<?,?,T>,T> void	writeToBuffer(C command)

Methods inherited from class java.lang.Object

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

Field Detail

channel

protected volatile Channel channel

Constructor Detail

DefaultEndpoint

public DefaultEndpoint(ClientOptions clientOptions,
                       ClientResources clientResources)

Create a new DefaultEndpoint.

Parameters:

clientOptions - client options for this connection, must not be null.

clientResources - client resources for this connection, must not be null.

Method Detail

setConnectionFacade

public void setConnectionFacade(ConnectionFacade connectionFacade)

Description copied from interface: RedisChannelWriter

Set the corresponding connection facade in order to notify it about channel active/inactive state.

Specified by:

setConnectionFacade in interface RedisChannelWriter

Parameters:

connectionFacade - the connection facade (external connection object)

getClientResources

public ClientResources getClientResources()

Specified by:

getClientResources in interface RedisChannelWriter

Returns:

the ClientResources.

setAutoFlushCommands

public void setAutoFlushCommands(boolean autoFlush)

Description copied from interface: RedisChannelWriter

Disable or enable auto-flush behavior. Default is true. If autoFlushCommands is disabled, multiple commands can be issued without writing them actually to the transport. Commands are buffered until a RedisChannelWriter.flushCommands() is issued. After calling RedisChannelWriter.flushCommands() commands are sent to the transport and executed by Redis.

Specified by:

setAutoFlushCommands in interface RedisChannelWriter

Parameters:

autoFlush - state of autoFlush.

write

public <K,V,T> RedisCommand<K,V,T> write(RedisCommand<K,V,T> command)

Description copied from interface: RedisChannelWriter

Write a command on the channel. The command may be changed/wrapped during write and the written instance is returned after the call.

Specified by:

write in interface RedisChannelWriter

T - result type

Parameters:

command - the Redis command.

Returns:

the written Redis command.

write

public <K,V> Collection<RedisCommand<K,V,?>> write(Collection<? extends RedisCommand<K,V,?>> commands)

Description copied from interface: RedisChannelWriter

Write multiple commands on the channel. The commands may be changed/wrapped during write and the written instance is returned after the call.

Specified by:

write in interface RedisChannelWriter

Type Parameters:

K - key type

V - value type

Parameters:

commands - the Redis commands.

Returns:

the written redis command

writeToBuffer

protected <C extends RedisCommand<?,?,T>,T> void writeToBuffer(C command)

notifyChannelActive

public void notifyChannelActive(Channel channel)

Description copied from interface: Endpoint

Notify about channel activation.

Specified by:

notifyChannelActive in interface Endpoint

Parameters:

channel - the channel

notifyChannelInactive

public void notifyChannelInactive(Channel channel)

Description copied from interface: Endpoint

Notify about channel deactivation.

Specified by:

notifyChannelInactive in interface Endpoint

Parameters:

channel - the channel

notifyException

public void notifyException(Throwable t)

Description copied from interface: Endpoint

Notify about an exception occured in channel/command processing

Specified by:

notifyException in interface Endpoint

Parameters:

t - the Exception

registerConnectionWatchdog

public void registerConnectionWatchdog(ConnectionWatchdog connectionWatchdog)

Description copied from interface: Endpoint

Associate a ConnectionWatchdog with the Endpoint.

Specified by:

registerConnectionWatchdog in interface Endpoint

Parameters:

connectionWatchdog - the connection watchdog.

flushCommands

public void flushCommands()

Description copied from interface: RedisChannelWriter

Flush pending commands. This commands forces a flush on the channel and can be used to buffer ("pipeline") commands to achieve batching. No-op if channel is not connected.

Specified by:

flushCommands in interface RedisChannelWriter

close

public void close()

Close the connection.

Specified by:

close in interface RedisChannelWriter

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

closeAsync

public CompletableFuture<Void> closeAsync()

Description copied from interface: RedisChannelWriter

Asynchronously close the RedisChannelWriter.

Specified by:

closeAsync in interface AsyncCloseable

Specified by:

closeAsync in interface RedisChannelWriter

Returns:

future for result synchronization.

reset

public void reset()

Reset the writer state. Queued commands will be canceled and the internal state will be reset. This is useful when the internal state machine gets out of sync with the connection.

Specified by:

reset in interface RedisChannelWriter

initialState

public void initialState()

Reset the command-handler to the initial not-connected state.

Specified by:

initialState in interface Endpoint

notifyDrainQueuedCommands

public void notifyDrainQueuedCommands(io.lettuce.core.protocol.HasQueuedCommands queuedCommands)

Description copied from interface: Endpoint

Signal the endpoint to drain queued commands from the queue holder.

Specified by:

notifyDrainQueuedCommands in interface Endpoint

Parameters:

queuedCommands - the queue holder.

isClosed

public boolean isClosed()

doExclusive

protected <T> T doExclusive(Supplier<T> supplier)

Execute a Supplier callback guarded by an exclusive lock.

Type Parameters:

T -

Parameters:

supplier -

Returns:

drainCommands

protected List<RedisCommand<?,?,?>> drainCommands()

logPrefix

protected String logPrefix()