Async client-side interface for bi-directional streaming, where the outgoing message stream going to the server has messages of type W, and the incoming message stream coming from the server has messages of type R. More...

#include <async_stream.h>

Public Member Functions
void	ReadInitialMetadata (void *tag) override
	See the ClientAsyncStreamingInterface.ReadInitialMetadata method for semantics of this method. More...

void	Read (R msg, void tag) override
	Read a message of type R into msg. More...

void	Write (const W &msg, void *tag) override
	Request the writing of msg with identifying tag tag. More...

void	Write (const W &msg, WriteOptions options, void *tag) override
	Request the writing of msg using WriteOptions options with identifying tag tag. More...

void	WritesDone (void *tag) override
	Signal the client is done with the writes (half-close the client stream). More...

void	Finish (Status status, void tag) override
	See the ClientAsyncStreamingInterface.Finish method for semantics. More...

Public Member Functions inherited from grpc::ClientAsyncStreamingInterface
virtual	~ClientAsyncStreamingInterface ()

Public Member Functions inherited from grpc::AsyncWriterInterface< W >
virtual	~AsyncWriterInterface ()

void	WriteLast (const W &msg, WriteOptions options, void *tag)
	Request the writing of msg and coalesce it with the writing of trailing metadata, using WriteOptions options with identifying tag tag. More...

Public Member Functions inherited from grpc::AsyncReaderInterface< R >
virtual	~AsyncReaderInterface ()

Static Public Member Functions
static ClientAsyncReaderWriter *	Create (ChannelInterface channel, CompletionQueue cq, const RpcMethod &method, ClientContext context, void tag)
	Create a stream and write the first request out. More...

static void	operator delete (void *ptr, std::size_t size)

Detailed Description

template<class W, class R>
class grpc::ClientAsyncReaderWriter< W, R >

Async client-side interface for bi-directional streaming, where the outgoing message stream going to the server has messages of type W, and the incoming message stream coming from the server has messages of type R.

Member Function Documentation

template<class W , class R >

static ClientAsyncReaderWriter* grpc::ClientAsyncReaderWriter< W, R >::Create	(	ChannelInterface *	channel,
		CompletionQueue *	cq,
		const RpcMethod &	method,
		ClientContext *	context,
		void *	tag
	)

inlinestatic

Create a stream and write the first request out.

tag will be notified on cq when the call has been started (i.e. intitial metadata sent). Note that context will be used to fill in custom initial metadata used to send to the server when starting the call.

template<class W , class R >

void grpc::ClientAsyncReaderWriter< W, R >::Finish	(	Status *	status,
		void *	tag
	)

inlineoverridevirtual

See the ClientAsyncStreamingInterface.Finish method for semantics.

Side effect

the ClientContext associated with this call is updated with possible initial and trailing metadata sent from the server.

Implements grpc::ClientAsyncStreamingInterface.

template<class W , class R >

static void grpc::ClientAsyncReaderWriter< W, R >::operator delete	(	void *	ptr,
		std::size_t	size
	)

inlinestatic

template<class W , class R >

void grpc::ClientAsyncReaderWriter< W, R >::Read	(	R *	msg,
		void *	tag
	)

inlineoverridevirtual

Read a message of type R into msg.

Completion will be notified by tag on the associated completion queue. This is thread-safe with respect to Write or WritesDone methods. It should not be called concurrently with other streaming APIs on the same stream. It is not meaningful to call it concurrently with another AsyncReaderInterface::Read on the same stream since reads on the same stream are delivered in order.

Parameters

[out]	msg	Where to eventually store the read message.
[in]	tag	The tag identifying the operation.

Side effect: note that this method attempt to receive initial metadata for a stream if it hasn't yet been received.

Implements grpc::AsyncReaderInterface< R >.

template<class W , class R >

void grpc::ClientAsyncReaderWriter< W, R >::ReadInitialMetadata ( void * tag )

inlineoverridevirtual

See the ClientAsyncStreamingInterface.ReadInitialMetadata method for semantics of this method.

Side effect:

upon receiving initial metadata from the server, the ClientContext is updated with it, and then the receiving initial metadata can be accessed through this ClientContext.

Implements grpc::ClientAsyncStreamingInterface.

template<class W , class R >

void grpc::ClientAsyncReaderWriter< W, R >::Write	(	const W &	msg,
		void *	tag
	)

inlineoverridevirtual

Request the writing of msg with identifying tag tag.

Only one write may be outstanding at any given time. This means that after calling Write, one must wait to receive tag from the completion queue BEFORE calling Write again. This is thread-safe with respect to AsyncReaderInterface::Read

Parameters

[in]	msg	The message to be written.
[in]	tag	The tag identifying the operation.

Implements grpc::AsyncWriterInterface< W >.

template<class W , class R >

void grpc::ClientAsyncReaderWriter< W, R >::Write	(	const W &	msg,
		WriteOptions	options,
		void *	tag
	)

inlineoverridevirtual

Request the writing of msg using WriteOptions options with identifying tag tag.

Only one write may be outstanding at any given time. This means that after calling Write, one must wait to receive tag from the completion queue BEFORE calling Write again. WriteOptions options is used to set the write options of this message. This is thread-safe with respect to AsyncReaderInterface::Read

Parameters