Module lettuce.core

Package io.lettuce.core.protocol

Class CommandExpiryWriter

java.lang.Object

io.lettuce.core.protocol.CommandExpiryWriter

All Implemented Interfaces:

AsyncCloseable, RedisChannelWriter, Closeable, AutoCloseable

public class CommandExpiryWriter
extends Object
implements RedisChannelWriter

Extension to RedisChannelWriter that expires commands. Command timeout starts at the time the command is written regardless to flushing mode (user-controlled batching).

Since:

5.1

Author:

Mark Paluch

See Also:

TimeoutOptions

Constructor Summary

Constructors

Constructor	Description
CommandExpiryWriter(RedisChannelWriter writer, ClientOptions clientOptions, ClientResources clientResources)	Create a new CommandExpiryWriter.

Method Summary

Modifier and Type	Method	Description
void	close()
CompletableFuture<Void>	closeAsync()	Asynchronously close the RedisChannelWriter.
void	flushCommands()	Flush pending commands.
ClientResources	getClientResources()
static boolean	isSupported(ClientOptions clientOptions)	Check whether ClientOptions is configured to timeout commands.
void	reset()	Reset the command 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.
void	setTimeout(Duration timeout)
<K, V, T> RedisCommand<K,V,T>	write(RedisCommand<K,V,T> command)	Write a command on the channel.
<K, V> Collection<RedisCommand<K,V,?>>	write(Collection<? extends RedisCommand<K,V,?>> redisCommands)	Write multiple commands on the channel.

Methods inherited from class java.lang.Object

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

Constructor Details

CommandExpiryWriter

public CommandExpiryWriter(RedisChannelWriter writer,
ClientOptions clientOptions,
ClientResources clientResources)

Create a new CommandExpiryWriter.

Parameters:

writer - must not be null.

clientOptions - must not be null.

clientResources - must not be null.

Method Details

isSupported

public static boolean isSupported(ClientOptions clientOptions)

Check whether ClientOptions is configured to timeout commands.

Parameters:

clientOptions - must not be null.

Returns:

true if ClientOptions are configured to timeout commands.

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,?>> redisCommands)

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:

redisCommands - the Redis commands.

Returns:

the written redis command

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()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface RedisChannelWriter

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()

Description copied from interface: RedisChannelWriter

Reset the command 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 (e.g. errors during external SSL tunneling). Calling this method will reset the protocol state, therefore it is considered unsafe.

Specified by:

reset in interface RedisChannelWriter

setTimeout

public void setTimeout(Duration timeout)