io.vertx.reactivex.core.streams

Class Pump

java.lang.Object

io.vertx.reactivex.core.streams.Pump

public class Pump
extends Object

Pumps data from a ReadStream to a WriteStream and performs flow control where necessary to prevent the write stream buffer from getting overfull.

Instances of this class read items from a ReadStream and write them to a WriteStream. If data can be read faster than it can be written this could result in the write queue of the WriteStream growing without bound, eventually causing it to exhaust all available RAM.

To prevent this, after each write, instances of this class check whether the write queue of the WriteStream is full, and if so, the ReadStream is paused, and a drainHandler is set on the WriteStream.

When the WriteStream has processed half of its backlog, the drainHandler will be called, which results in the pump resuming the ReadStream.

This class can be used to pump from any ReadStream to any WriteStream, e.g. from an HttpServerRequest to an AsyncFile, or from NetSocket to a WebSocket.

Please see the documentation for more information.

NOTE: This class has been automatically generated from the original non RX-ified interface using Vert.x codegen.

Field Summary

Fields

Modifier and Type	Field and Description
static io.vertx.lang.rx.TypeArg<Pump>	__TYPE_ARG

Constructor Summary

Constructors

Constructor and Description
Pump(Object delegate)
Pump(Pump delegate)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
Pump	getDelegate()
int	hashCode()
static Pump	newInstance(Pump arg)
int	numberPumped() Return the total number of items pumped by this pump.
static <T> Pump	pump(Flowable<T> rs, WriteStream<T> ws) Create a new Pump with the given ReadStream and WriteStream
static <T> Pump	pump(Flowable<T> rs, WriteStream<T> ws, int writeQueueMaxSize) Create a new Pump with the given ReadStream and WriteStream and writeQueueMaxSize
static <T> Pump	pump(ReadStream<T> rs, WriteStream<T> ws) Create a new Pump with the given ReadStream and WriteStream
static <T> Pump	pump(ReadStream<T> rs, WriteStream<T> ws, int writeQueueMaxSize) Create a new Pump with the given ReadStream and WriteStream and writeQueueMaxSize
Pump	setWriteQueueMaxSize(int maxSize) Set the write queue max size to maxSize
Pump	start() Start the Pump.
Pump	stop() Stop the Pump.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

__TYPE_ARG

public static final io.vertx.lang.rx.TypeArg<Pump> __TYPE_ARG

Constructor Detail

Pump

public Pump(Pump delegate)

Pump

public Pump(Object delegate)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getDelegate

public Pump getDelegate()

pump

public static <T> Pump pump(ReadStream<T> rs,
                            WriteStream<T> ws)

Create a new Pump with the given ReadStream and WriteStream

Parameters:

rs - the read stream

ws - the write stream

Returns:

the pump

pump

public static <T> Pump pump(Flowable<T> rs,
                            WriteStream<T> ws)

Create a new Pump with the given ReadStream and WriteStream

Parameters:

rs - the read stream

ws - the write stream

Returns:

the pump

pump

public static <T> Pump pump(ReadStream<T> rs,
                            WriteStream<T> ws,
                            int writeQueueMaxSize)

Create a new Pump with the given ReadStream and WriteStream and writeQueueMaxSize

Parameters:

rs - the read stream

ws - the write stream

writeQueueMaxSize - the max size of the write queue

Returns:

the pump

pump

public static <T> Pump pump(Flowable<T> rs,
                            WriteStream<T> ws,
                            int writeQueueMaxSize)

Create a new Pump with the given ReadStream and WriteStream and writeQueueMaxSize

Parameters:

rs - the read stream

ws - the write stream

writeQueueMaxSize - the max size of the write queue

Returns:

the pump

setWriteQueueMaxSize

public Pump setWriteQueueMaxSize(int maxSize)

Set the write queue max size to maxSize

Parameters:

maxSize - the max size

Returns:

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

start

public Pump start()

Start the Pump. The Pump can be started and stopped multiple times.

Returns:

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

stop

public Pump stop()

Stop the Pump. The Pump can be started and stopped multiple times.

Returns:

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

numberPumped

public int numberPumped()

Return the total number of items pumped by this pump.

Returns:

newInstance

public static Pump newInstance(Pump arg)