AbstractRedisClient (Lettuce 6.2.6.RELEASE API)

java.lang.Object
- io.lettuce.core.AbstractRedisClient

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

RedisClient, RedisClusterClient
```
public abstract class AbstractRedisClient
extends Object
implements AutoCloseable
```
Base Redis client. This class holds the netty infrastructure, ClientOptions and the basic connection procedure. This class creates the netty EventLoopGroups for NIO (NioEventLoopGroup) and EPoll ( EpollEventLoopGroup) with a default of Runtime.getRuntime().availableProcessors() * 4 threads. Reuse the instance as much as possible since the EventLoopGroup instances are expensive and can consume a huge part of your resources, if you create multiple instances.
You can set the number of threads per NioEventLoopGroup by setting the io.netty.eventLoopThreads system property to a reasonable number of threads.

Since:

3.0

Author:

Mark Paluch, Jongyeol Choi, Poorva Gokhale

See Also:

ClientResources

Field Summary

Fields
Modifier and Type Field and Description

protected ChannelGroup channels

protected Set<Closeable> closeableResources

protected ConnectionEvents connectionEvents

Fields
Modifier and Type	Field and Description
`protected ChannelGroup`	`channels`
`protected Set<Closeable>`	`closeableResources`
`protected ConnectionEvents`	`connectionEvents`

Constructor Summary

Constructors
Modifier Constructor and Description

protected AbstractRedisClient(ClientResources clientResources)
Create a new instance with client resources.

Constructors
Modifier	Constructor and Description
`protected`	`AbstractRedisClient(ClientResources clientResources)` Create a new instance with client resources.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`addListener(CommandListener listener)` Add a listener for Redis Command events.
`void`	`addListener(RedisConnectionStateListener listener)` Add a listener for the RedisConnectionState.
`protected void`	`channelType(ConnectionBuilder connectionBuilder, ConnectionPoint connectionPoint)`
`void`	`close()`
`protected void`	`connectionBuilder(Mono<SocketAddress> socketAddressSupplier, ConnectionBuilder connectionBuilder, ConnectionEvents connectionEvents, RedisURI redisURI)` Populate connection builder with necessary resources.
`protected void`	`connectionBuilder(Mono<SocketAddress> socketAddressSupplier, ConnectionBuilder connectionBuilder, RedisURI redisURI)` Populate connection builder with necessary resources.
`protected io.lettuce.core.RedisHandshake`	`createHandshake(ConnectionState state)`
`protected int`	`getChannelCount()`
`protected List<CommandListener>`	`getCommandListeners()`
`protected <T> T`	`getConnection(CompletableFuture<T> connectionFuture)` Retrieve the connection from `ConnectionFuture`.
`protected <T> T`	`getConnection(ConnectionFuture<T> connectionFuture)` Retrieve the connection from `ConnectionFuture`.
`Duration`	`getDefaultTimeout()` Deprecated. since 6.2, use `RedisURI.getTimeout()` to control timeouts.
`ClientOptions`	`getOptions()` Returns the `ClientOptions` which are valid for that client.
`protected int`	`getResourceCount()`
`ClientResources`	`getResources()` Returns the `ClientResources` which are used with that client.
`protected <K,V,T extends RedisChannelHandler<K,V>> ConnectionFuture<T>`	`initializeChannelAsync(ConnectionBuilder connectionBuilder)` Connect and initialize a channel from `ConnectionBuilder`.
`void`	`removeListener(CommandListener listener)` Removes a listener.
`void`	`removeListener(RedisConnectionStateListener listener)` Removes a listener.
`void`	`setDefaultTimeout(Duration timeout)` Deprecated. since 6.2, use `RedisURI.getTimeout()` to control timeouts.
`void`	`setDefaultTimeout(long timeout, TimeUnit unit)` Deprecated. since 6.2, use `RedisURI.getTimeout()` to control timeouts.
`protected void`	`setOptions(ClientOptions clientOptions)` Set the `ClientOptions` for the client.
`void`	`shutdown()` Shutdown this client and close all open connections once this method is called.
`void`	`shutdown(Duration quietPeriod, Duration timeout)` Shutdown this client and close all open connections once this method is called.
`void`	`shutdown(long quietPeriod, long timeout, TimeUnit timeUnit)` Shutdown this client and close all open connections once this method is called.
`CompletableFuture<Void>`	`shutdownAsync()` Shutdown this client and close all open connections asynchronously.
`CompletableFuture<Void>`	`shutdownAsync(long quietPeriod, long timeout, TimeUnit timeUnit)` Shutdown this client and close all open connections asynchronously.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - connectionEvents
```
protected final ConnectionEvents connectionEvents
```
  - closeableResources
```
protected final Set<Closeable> closeableResources
```
  - channels
```
protected final ChannelGroup channels
```
- Constructor Detail
  - AbstractRedisClient
```
protected AbstractRedisClient(ClientResources clientResources)
```
    Create a new instance with client resources.
    
    Parameters:
    
    clientResources - the client resources. If null, the client will create a new dedicated instance of client resources and keep track of them.
- Method Detail
  - getChannelCount
```
protected int getChannelCount()
```
  - getDefaultTimeout
```
@Deprecated
public Duration getDefaultTimeout()
```
    Deprecated. since 6.2, use RedisURI.getTimeout() to control timeouts.
    
    Returns the default timeout for commands.
    
    Returns:
    
    the default timeout for commands.
  - setDefaultTimeout
```
@Deprecated
public void setDefaultTimeout(Duration timeout)
```
    Deprecated. since 6.2, use RedisURI.getTimeout() to control timeouts.
    
    Set the default timeout for connections created by this client. The timeout applies to connection attempts and non-blocking commands.
    
    Parameters:
    
    timeout - default connection timeout, must not be null.
    
    Since:
    
    5.0
  - setDefaultTimeout
```
@Deprecated
public void setDefaultTimeout(long timeout,
                                          TimeUnit unit)
```
    Deprecated. since 6.2, use RedisURI.getTimeout() to control timeouts.
    
    Set the default timeout for connections created by this client. The timeout applies to connection attempts and non-blocking commands.
    
    Parameters:
    
    timeout - Default connection timeout.
    
    unit - Unit of time for the timeout.
  - getOptions
```
public ClientOptions getOptions()
```
    Returns the ClientOptions which are valid for that client. Connections inherit the current options at the moment the connection is created. Changes to options will not affect existing connections.
    
    Returns:
    
    the ClientOptions for this client
  - setOptions
```
protected void setOptions(ClientOptions clientOptions)
```
    Set the ClientOptions for the client.
    
    Parameters:
    
    clientOptions - client options for the client and connections that are created after setting the options
  - getResources
```
public ClientResources getResources()
```
    Returns the ClientResources which are used with that client.
    
    Returns:
    
    the ClientResources for this client.
    
    Since:
    
    6.0
  - getResourceCount
```
protected int getResourceCount()
```
  - addListener
```
public void addListener(RedisConnectionStateListener listener)
```
    Add a listener for the RedisConnectionState. The listener is notified every time a connect/disconnect/IO exception happens. The listeners are not bound to a specific connection, so every time a connection event happens on any connection, the listener will be notified. The corresponding netty channel handler (async connection) is passed on the event.
    
    Parameters:
    
    listener - must not be null.
  - removeListener
```
public void removeListener(RedisConnectionStateListener listener)
```
    Removes a listener.
    
    Parameters:
    
    listener - must not be null.
  - addListener
```
public void addListener(CommandListener listener)
```
    Add a listener for Redis Command events. The listener is notified on each command start/success/failure.
    
    Parameters:
    
    listener - must not be null.
    
    Since:
    
    6.1
  - removeListener
```
public void removeListener(CommandListener listener)
```
    Removes a listener.
    
    Parameters:
    
    listener - must not be null.
    
    Since:
    
    6.1
  - getCommandListeners
```
protected List<CommandListener> getCommandListeners()
```
  - connectionBuilder
```
protected void connectionBuilder(Mono<SocketAddress> socketAddressSupplier,
                                 ConnectionBuilder connectionBuilder,
                                 RedisURI redisURI)
```
    Populate connection builder with necessary resources.
    
    Parameters:
    
    socketAddressSupplier - address supplier for initial connect and re-connect
    
    connectionBuilder - connection builder to configure the connection
    
    redisURI - URI of the Redis instance
  - connectionBuilder
```
protected void connectionBuilder(Mono<SocketAddress> socketAddressSupplier,
                                 ConnectionBuilder connectionBuilder,
                                 ConnectionEvents connectionEvents,
                                 RedisURI redisURI)
```
    Populate connection builder with necessary resources.
    
    Parameters:
    
    socketAddressSupplier - address supplier for initial connect and re-connect
    
    connectionBuilder - connection builder to configure the connection
    
    connectionEvents - connection events dispatcher
    
    redisURI - URI of the Redis instance
    
    Since:
    
    6.2
  - channelType
```
protected void channelType(ConnectionBuilder connectionBuilder,
                           ConnectionPoint connectionPoint)
```
  - getConnection
```
protected <T> T getConnection(ConnectionFuture<T> connectionFuture)
```
    Retrieve the connection from ConnectionFuture. Performs a blocking ConnectionFuture.get() to synchronize the channel/connection initialization. Any exception is rethrown as RedisConnectionException.
    
    Type Parameters:
    
    T - Connection type.
    
    Parameters:
    
    connectionFuture - must not be null.
    
    Returns:
    
    the connection.
    
    Throws:
    
    RedisConnectionException - in case of connection failures.
    
    Since:
    
    4.4
  - getConnection
```
protected <T> T getConnection(CompletableFuture<T> connectionFuture)
```
    Retrieve the connection from ConnectionFuture. Performs a blocking ConnectionFuture.get() to synchronize the channel/connection initialization. Any exception is rethrown as RedisConnectionException.
    
    Type Parameters:
    
    T - Connection type.
    
    Parameters:
    
    connectionFuture - must not be null.
    
    Returns:
    
    the connection.
    
    Throws:
    
    RedisConnectionException - in case of connection failures.
    
    Since:
    
    5.0
  - initializeChannelAsync
```
protected <K,V,T extends RedisChannelHandler<K,V>> ConnectionFuture<T> initializeChannelAsync(ConnectionBuilder connectionBuilder)
```
    Connect and initialize a channel from ConnectionBuilder.
    
    Parameters:
    
    connectionBuilder - must not be null.
    
    Returns:
    
    the ConnectionFuture to synchronize the connection process.
    
    Since:
    
    4.4
  - shutdown
```
public void shutdown()
```
    Shutdown this client and close all open connections once this method is called. Once all connections are closed, the associated ClientResources are shut down/released gracefully considering quiet time and the shutdown timeout. The client should be discarded after calling shutdown. The shutdown is executed without quiet time and a timeout of 2 TimeUnit.SECONDS.
    
    See Also:
    
    EventExecutorGroup.shutdownGracefully(long, long, TimeUnit)
  - close
```
public void close()
```
    Specified by:
    
    close in interface AutoCloseable
  - shutdown
```
public void shutdown(Duration quietPeriod,
                     Duration timeout)
```
    Shutdown this client and close all open connections once this method is called. Once all connections are closed, the associated ClientResources are shut down/released gracefully considering quiet time and the shutdown timeout. The client should be discarded after calling shutdown.
    
    Parameters:
    
    quietPeriod - the quiet period to allow the executor gracefully shut down.
    
    timeout - the maximum amount of time to wait until the backing executor is shutdown regardless if a task was submitted during the quiet period.
    
    Since:
    
    5.0
    
    See Also:
    
    EventExecutorGroup.shutdownGracefully(long, long, TimeUnit)
  - shutdown
```
public void shutdown(long quietPeriod,
                     long timeout,
                     TimeUnit timeUnit)
```
    Shutdown this client and close all open connections once this method is called. Once all connections are closed, the associated ClientResources are shut down/released gracefully considering quiet time and the shutdown timeout. The client should be discarded after calling shutdown.
    
    Parameters:
    
    quietPeriod - the quiet period to allow the executor gracefully shut down.
    
    timeout - the maximum amount of time to wait until the backing executor is shutdown regardless if a task was submitted during the quiet period.
    
    timeUnit - the unit of quietPeriod and timeout.
    
    See Also:
    
    EventExecutorGroup.shutdownGracefully(long, long, TimeUnit)
  - shutdownAsync
```
public CompletableFuture<Void> shutdownAsync()
```
    Shutdown this client and close all open connections asynchronously. Once all connections are closed, the associated ClientResources are shut down/released gracefully considering quiet time and the shutdown timeout. The client should be discarded after calling shutdown. The shutdown is executed without quiet time and a timeout of 2 TimeUnit.SECONDS.
    
    Since:
    
    4.4
    
    See Also:
    
    EventExecutorGroup.shutdownGracefully(long, long, TimeUnit)
  - shutdownAsync
```
public CompletableFuture<Void> shutdownAsync(long quietPeriod,
                                             long timeout,
                                             TimeUnit timeUnit)
```
    Shutdown this client and close all open connections asynchronously. Once all connections are closed, the associated ClientResources are shut down/released gracefully considering quiet time and the shutdown timeout. The client should be discarded after calling shutdown.
    
    Parameters:
    
    quietPeriod - the quiet period to allow the executor gracefully shut down.
    
    timeout - the maximum amount of time to wait until the backing executor is shutdown regardless if a task was submitted during the quiet period.
    
    timeUnit - the unit of quietPeriod and timeout.
    
    Since:
    
    4.4
    
    See Also:
    
    EventExecutorGroup.shutdownGracefully(long, long, TimeUnit)
  - createHandshake
```
protected io.lettuce.core.RedisHandshake createHandshake(ConnectionState state)
```

Class AbstractRedisClient

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

connectionEvents

closeableResources

channels

Constructor Detail

AbstractRedisClient

Method Detail

getChannelCount

getDefaultTimeout

setDefaultTimeout

setDefaultTimeout

getOptions

setOptions

getResources

getResourceCount

addListener

removeListener

addListener

removeListener

getCommandListeners

connectionBuilder

connectionBuilder

channelType

getConnection

getConnection

initializeChannelAsync

shutdown

close

shutdown

shutdown

shutdownAsync

shutdownAsync

createHandshake