io.vertx.reactivex.core.streams

Interface ReadStream<T>

All Superinterfaces:

StreamBase

All Known Subinterfaces:

WebSocketBase

All Known Implementing Classes:

AmqpReceiver, AsyncFile, CassandraRowStream, ClientWebSocket, DatagramSocket, GrpcClientResponse, GrpcReadStream, GrpcServerRequest, HttpClientResponse, HttpServerFileUpload, HttpServerRequest, JsonParser, KafkaConsumer, MessageConsumer, NetSocket, PgChannel, RabbitMQConsumer, RecordParser, RedisConnection, RowStream, ServerWebSocket, SockJSSocket, SQLRowStream, TestSuiteReport, TimeoutStream, WebSocket

public interface ReadStream<T>
extends StreamBase

Represents a stream of items that can be read from.

Any class that implements this interface can be used by a Pipe to pipe data from it to a WriteStream.

Streaming mode

The stream is either in flowing or fetch mode.

Initially the stream is in flowing mode.
• When the stream is in flowing mode, elements are delivered to the handler.
• When the stream is in fetch mode, only the number of requested elements will be delivered to the handler.

The mode can be changed with the pause(), resume() and fetch(long) methods:

• Calling resume() sets the flowing mode
• Calling pause() sets the fetch mode and resets the demand to 0
• Calling fetch(long) requests a specific amount of elements and adds it to the actual demand

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

Method Summary

Modifier and Type	Method and Description
ReadStream<T>	endHandler(Handler<Void> endHandler) Set an end handler.
ReadStream<T>	exceptionHandler(Handler<Throwable> handler) Set an exception handler on the read stream.
ReadStream<T>	fetch(long amount) Fetch the specified amount of elements.
ReadStream	getDelegate()
ReadStream<T>	handler(Handler<T> handler) Set a data handler.
static <T> ReadStream<T>	newInstance(ReadStream arg)
static <T> ReadStream<T>	newInstance(ReadStream arg, io.vertx.lang.rx.TypeArg<T> __typeArg_T)
ReadStream<T>	pause() Pause the ReadStream, it sets the buffer in fetch mode and clears the actual demand.
Pipe<T>	pipe() Pause this stream and return a Pipe to transfer the elements of this stream to a destination WriteStream.
void	pipeTo(WriteStream<T> dst) Pipe this ReadStream to the WriteStream.
void	pipeTo(WriteStream<T> dst, Handler<AsyncResult<Void>> handler) Pipe this ReadStream to the WriteStream.
ReadStream<T>	resume() Resume reading, and sets the buffer in flowing mode.
Completable	rxPipeTo(WriteStream<T> dst) Pipe this ReadStream to the WriteStream.
Flowable<T>	toFlowable()
Observable<T>	toObservable()

Methods inherited from interface io.vertx.reactivex.core.streams.StreamBase

newInstance

Method Detail

getDelegate

ReadStream getDelegate()

Specified by:

getDelegate in interface StreamBase

exceptionHandler

ReadStream<T> exceptionHandler(Handler<Throwable> handler)

Set an exception handler on the read stream.

Specified by:

exceptionHandler in interface StreamBase

Parameters:

handler - the exception handler

Returns:

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

handler

ReadStream<T> handler(Handler<T> handler)

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

Parameters:

handler -

Returns:

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

pause

ReadStream<T> 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.

Returns:

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

resume

ReadStream<T> resume()

Resume reading, and sets the buffer in flowing mode.

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

Returns:

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

fetch

ReadStream<T> 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.

Parameters:

amount -

Returns:

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

endHandler

ReadStream<T> 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.

Parameters:

endHandler -

Returns:

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

pipe

Pipe<T> pipe()

Pause this stream and return a Pipe to transfer the elements of this stream to a destination WriteStream.

The stream will be resumed when the pipe will be wired to a WriteStream.

Returns:

a pipe

pipeTo

void pipeTo(WriteStream<T> dst,
            Handler<AsyncResult<Void>> handler)

Pipe this ReadStream to the WriteStream.

Elements emitted by this stream will be written to the write stream until this stream ends or fails.

Once this stream has ended or failed, the write stream will be ended and the handler will be called with the result.

Parameters:

dst - the destination write stream

handler -

pipeTo

void pipeTo(WriteStream<T> dst)

Pipe this ReadStream to the WriteStream.

Elements emitted by this stream will be written to the write stream until this stream ends or fails.

Once this stream has ended or failed, the write stream will be ended and the handler will be called with the result.

Parameters:

dst - the destination write stream

rxPipeTo

Completable rxPipeTo(WriteStream<T> dst)

Pipe this ReadStream to the WriteStream.

Elements emitted by this stream will be written to the write stream until this stream ends or fails.

Once this stream has ended or failed, the write stream will be ended and the handler will be called with the result.

Parameters:

dst - the destination write stream

Returns:

toObservable

Observable<T> toObservable()

toFlowable

Flowable<T> toFlowable()

newInstance

static <T> ReadStream<T> newInstance(ReadStream arg)

newInstance

static <T> ReadStream<T> newInstance(ReadStream arg,
                                     io.vertx.lang.rx.TypeArg<T> __typeArg_T)