qpid::client::FlowControl Struct Reference

Flow control works by associating a finite amount of "credit" with a subscription. More...

#include <qpid/client/FlowControl.h>

List of all members.

Public Member Functions
	FlowControl (uint32_t messages_=0, uint32_t bytes_=0, bool window_=false)
bool	operator== (const FlowControl &x)
Static Public Member Functions
static FlowControl	messageCredit (uint32_t messages_)
static FlowControl	messageWindow (uint32_t messages_)
static FlowControl	byteCredit (uint32_t bytes_)
static FlowControl	byteWindow (uint32_t bytes_)
static FlowControl	unlimited ()
static FlowControl	zero ()
Public Attributes
uint32_t	messages
	Message credit: subscription can accept up to this many messages.
uint32_t	bytes
	Byte credit: subscription can accept up to this many bytes of message content.
bool	window
	Window mode.
Static Public Attributes
static const uint32_t	UNLIMITED = 0xFFFFFFFF

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Detailed Description

Flow control works by associating a finite amount of "credit" with a subscription.

Credit includes a message count and a byte count. Each message received decreases the message count by one, and the byte count by the size of the message. Either count can have the special value UNLIMITED which is never decreased.

A subscription's credit is exhausted when the message count is 0 or the byte count is too small for the next available message. The subscription will not receive any further messages until is credit is renewed.

In "window mode" credit is automatically renewed when a message is completed (which by default happens when it is accepted). In non-window mode credit is not automatically renewed, it must be explicitly re-set (

See also:

Subscription)

Definition at line 49 of file FlowControl.h.

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Constructor & Destructor Documentation

qpid::client::FlowControl::FlowControl	(	uint32_t	messages_ = 0,
		uint32_t	bytes_ = 0,
		bool	window_ = false
	)			[inline]

Definition at line 51 of file FlowControl.h.

Referenced by byteCredit(), byteWindow(), messageCredit(), messageWindow(), unlimited(), and zero().

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Member Function Documentation

static FlowControl qpid::client::FlowControl::byteCredit

(

uint32_t

bytes_

)

[inline, static]

Definition at line 56 of file FlowControl.h.

References FlowControl(), and UNLIMITED.

static FlowControl qpid::client::FlowControl::byteWindow

(

uint32_t

bytes_

)

[inline, static]

Definition at line 57 of file FlowControl.h.

References FlowControl(), and UNLIMITED.

static FlowControl qpid::client::FlowControl::messageCredit

(

uint32_t

messages_

)

[inline, static]

Definition at line 54 of file FlowControl.h.

References FlowControl(), and UNLIMITED.

static FlowControl qpid::client::FlowControl::messageWindow

(

uint32_t

messages_

)

[inline, static]

Definition at line 55 of file FlowControl.h.

References FlowControl(), and UNLIMITED.

bool qpid::client::FlowControl::operator==

(

const FlowControl &

x

)

[inline]

Definition at line 68 of file FlowControl.h.

References bytes, messages, and window.

static FlowControl qpid::client::FlowControl::unlimited

(

)

[inline, static]

Definition at line 58 of file FlowControl.h.

References FlowControl(), and UNLIMITED.

static FlowControl qpid::client::FlowControl::zero

(

)

[inline, static]

Definition at line 59 of file FlowControl.h.

References FlowControl().

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Member Data Documentation

uint32_t qpid::client::FlowControl::bytes

Byte credit: subscription can accept up to this many bytes of message content.

Definition at line 64 of file FlowControl.h.

Referenced by operator==().

uint32_t qpid::client::FlowControl::messages

Message credit: subscription can accept up to this many messages.

Definition at line 62 of file FlowControl.h.

Referenced by operator==().

const uint32_t qpid::client::FlowControl::UNLIMITED = 0xFFFFFFFF [static]

Definition at line 50 of file FlowControl.h.

Referenced by byteCredit(), byteWindow(), messageCredit(), messageWindow(), and unlimited().

bool qpid::client::FlowControl::window

Window mode.

If true credit is automatically renewed as messages are acknowledged.

Definition at line 66 of file FlowControl.h.

Referenced by operator==().

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The documentation for this struct was generated from the following file:

• qpid/client/FlowControl.h