io.vertx.redis.client

Interface RedisConnection

All Superinterfaces:

ReadStream<Response>, StreamBase

public interface RedisConnection
extends ReadStream<Response>

A simple Redis client.

Method Summary

Modifier and Type	Method and Description
Future<List<Response>>	batch(List<Request> commands) Sends a list of commands in a single IO operation, this prevents any inter twinning to happen from other client users.
default RedisConnection	batch(List<Request> commands, Handler<AsyncResult<List<Response>>> onSend) Sends a list of commands in a single IO operation, this prevents any inter twinning to happen from other client users.
void	close() Closes the connection or returns to the pool.
RedisConnection	endHandler(Handler<Void> endHandler) Set an end handler.
RedisConnection	exceptionHandler(Handler<Throwable> handler) Set an exception handler on the read stream.
RedisConnection	fetch(long amount) Fetch the specified amount of elements.
RedisConnection	handler(Handler<Response> handler) Set a data handler.
RedisConnection	pause() Pause the ReadStream, it sets the buffer in fetch mode and clears the actual demand.
boolean	pendingQueueFull() Flag to notify if the pending message queue (commands in transit) is full.
RedisConnection	resume() Resume reading, and sets the buffer in flowing mode.
Future<Response>	send(Request command) Send the given command to the redis server or cluster.
default RedisConnection	send(Request command, Handler<AsyncResult<Response>> onSend) Send the given command to the redis server or cluster.

Methods inherited from interface io.vertx.core.streams.ReadStream

pipe, pipeTo, pipeTo

Method Detail

exceptionHandler

RedisConnection exceptionHandler(Handler<Throwable> handler)

Set an exception handler on the read stream.

Specified by:

exceptionHandler in interface ReadStream<Response>

Specified by:

exceptionHandler in interface StreamBase

Parameters:

handler - the exception handler

Returns:

a reference to this, so the API can be used fluently

handler

RedisConnection handler(Handler<Response> handler)

Set a data handler. As data is read, the handler will be called with the data.

Specified by:

handler in interface ReadStream<Response>

Returns:

a reference to this, so the API can be used fluently

pause

RedisConnection pause()

Pause the ReadStream, it sets the buffer in fetch mode and clears the actual demand.

While it's paused, no data will be sent to the data handler.

Specified by:

pause in interface ReadStream<Response>

Returns:

a reference to this, so the API can be used fluently

resume

RedisConnection resume()

Resume reading, and sets the buffer in flowing mode.

If the ReadStream has been paused, reading will recommence on it.

Specified by:

resume in interface ReadStream<Response>

Returns:

a reference to this, so the API can be used fluently

fetch

RedisConnection fetch(long amount)

Fetch the specified amount of elements. If the ReadStream has been paused, reading will recommence with the specified amount of items, otherwise the specified amount will be added to the current stream demand.

Specified by:

fetch in interface ReadStream<Response>

Returns:

a reference to this, so the API can be used fluently

endHandler

RedisConnection endHandler(Handler<Void> endHandler)

Set an end handler. Once the stream has ended, and there is no more data to be read, this handler will be called.

Specified by:

endHandler in interface ReadStream<Response>

Returns:

a reference to this, so the API can be used fluently

send

default RedisConnection send(Request command,
                             Handler<AsyncResult<Response>> onSend)

Send the given command to the redis server or cluster.

Parameters:

command - the command to send

onSend - the asynchronous result handler.

Returns:

fluent self.

send

Future<Response> send(Request command)

Send the given command to the redis server or cluster.

Parameters:

command - the command to send

Returns:

a future with the result of the operation

batch

default RedisConnection batch(List<Request> commands,
                              Handler<AsyncResult<List<Response>>> onSend)

Sends a list of commands in a single IO operation, this prevents any inter twinning to happen from other client users.

Parameters:

commands - list of command to send

onSend - the asynchronous result handler.

Returns:

fluent self.

batch

Future<List<Response>> batch(List<Request> commands)

Sends a list of commands in a single IO operation, this prevents any inter twinning to happen from other client users.

Parameters:

commands - list of command to send

Returns:

a future with the result of the operation

close

void close()

Closes the connection or returns to the pool.

pendingQueueFull

boolean pendingQueueFull()

Flag to notify if the pending message queue (commands in transit) is full. When the pending message queue is full and a new send command is issued it will result in a exception to be thrown. Checking this flag before sending can allow the application to wait before sending the next message.

Returns:

true is queue is full.