dds::core::status::SampleLostStatus Class Reference

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#include "Status.hpp"

Inheritance diagram for dds::core::status::SampleLostStatus:

Public Member Functions
	SampleLostStatus ()
bool	operator!= (const Value &other) const
D *	operator-> ()
const D *	operator-> () const
bool	operator== (const Value &other) const
int32_t	total_count () const
int32_t	total_count_change () const

Detailed Description

Attribute	Attribute Meaning
total_count	Total cumulative count of all samples lost across of instances of data published under the Topic.
total_count_change	The incremental number of samples lost since the last time the listener was called or the status was read.

A sample never reached the DataReader queue. The following events can lead to a sample lost status:

• When the Presentation QoS is used with coherentAccess set to true and ResourceLimits Qos is active a sample lost can occur when all resources are consumed by incomplete transactions. In order to prevent deadlocks the the current transaction is dropped which causes a SampleLost event.
• When the DestinationOrder QoS is set to BY_SOURCE_TIMESTAMP It can happen that older data is inserted after newer data is already taken by the DataReader. In this case the older data is not inserted into the DataReader and a Sample Lost is reported.
• When the networking service detects a gap between sequence numbers of incoming data it will report a Sample Lost event

Definition at line 61 of file Status.hpp.

Constructor & Destructor Documentation

SampleLostStatus()

dds::core::status::SampleLostStatus::SampleLostStatus

(

)

Definition at line 61 of file StatusImpl.hpp.

Member Function Documentation

operator!=()

template<typename D >

bool dds::core::Value< D >::operator!= ( const Value< D > &  other ) const

inherited

Compare this Value with another Value

Parameters

other

Value

Returns

true if not equal

Definition at line 99 of file Value.hpp.

operator->() [1/2]

template<typename D >

D * dds::core::Value< D >::operator-> ( )

inherited

The operator->() is provided to be able to directly invoke functions on the delegate.

The decision to provide direct access to the delegate was motivated by the need for providing a way that was not invasive with respect to the CXXDDS API and yet would allow for vendor-specific extension. Thus vendor-specific extensions can be invoked on the Value and on all its subclasses as follows:

my_dds_value.standard_function();
my_dds_value->vendor_specific_extension();

Returns

a reference to delegate.

Definition at line 111 of file Value.hpp.

operator->() [2/2]

template<typename D >

const D * dds::core::Value< D >::operator-> ( ) const

inherited

The operator->() is provided to be able to directly invoke functions on the delegate.

The decision to provide direct access to the delegate was motivated by the need for providing a way that was not invasive with respect to the CXXDDS API and yet would allow for vendor-specific extension. Thus vendor-specific extensions can be invoked on the Value and on all its subclasses as follows:

my_dds_value.standard_function();
my_dds_value->vendor_specific_extension();

Returns

a reference to delegate.

Definition at line 105 of file Value.hpp.

operator==()

template<typename D >

bool dds::core::Value< D >::operator== ( const Value< D > &  other ) const

inherited

Compare this Value with another Value

Parameters

other

Value

Returns

true if equal

Definition at line 93 of file Value.hpp.

total_count()

int32_t dds::core::status::SampleLostStatus::total_count

(

)

const

Returns

Total cumulative count of all samples lost across of instances of data published under the Topic.

Definition at line 64 of file StatusImpl.hpp.

total_count_change()

int32_t dds::core::status::SampleLostStatus::total_count_change

(

)

const

Returns

The incremental number of samples lost since the last time the listener was called or the status was read.

Definition at line 70 of file StatusImpl.hpp.

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The documentation for this class was generated from the following files:

• include/dcps/C++/isocpp2/dds/core/status/Status.hpp
• include/dcps/C++/isocpp2/dds/core/status/detail/StatusImpl.hpp