dds::topic::qos::TopicQos Class Reference

<<value-type>> Container of the QoS policies that a dds::topic::Topic supports More...

#include <dds/topic/qos/TopicQos.hpp>

Public Member Functions
	TopicQos ()
	Creates a TopicQos with the default value for each policy. More...
template<typename POLICY >
const POLICY &	policy () const
	Gets a QoS policy by const reference. More...
template<typename POLICY >
POLICY &	policy ()
	Gets a QoS policy by reference. More...
template<typename Policy >
TopicQos &	policy (const Policy &p)
	Sets a policy. More...
template<typename Policy >
TopicQos &	operator<< (const Policy &p)
	Sets a policy. More...
template<typename Policy >
const TopicQos &	operator>> (Policy &p) const
	Copies the values of a policy. More...

Related Functions
(Note that these are not member functions.)
std::string	to_string (const TopicQos &qos, const rti::core::QosPrintFormat &format=rti::core::QosPrintFormat())
	<<extension>> Obtains a string representation of the dds::topic::qos::TopicQos More...
std::string	to_string (const TopicQos &qos, const TopicQos &base, const rti::core::QosPrintFormat &format=rti::core::QosPrintFormat())
	<<extension>> Obtains a string representation of the dds::topic::qos::TopicQos More...
std::string	to_string (const TopicQos &qos, const rti::core::qos_print_all_t &qos_print_all, const rti::core::QosPrintFormat &format=rti::core::QosPrintFormat())
	<<extension>> Obtains a string representation of the dds::topic::qos::TopicQos More...
std::ostream &	operator<< (std::ostream &out, const rti::topic::qos::TopicQos &qos)
	<<extension>> Prints a dds::topic::qos::TopicQos to an output stream. More...

Detailed Description

<<value-type>> Container of the QoS policies that a dds::topic::Topic supports

TopicQos Policies

A TopicQos contains the following policies:

• dds::core::policy::TopicData,
• dds::core::policy::Durability,
• dds::core::policy::DurabilityService,
• dds::core::policy::Deadline,
• dds::core::policy::LatencyBudget,
• dds::core::policy::Liveliness,
• dds::core::policy::Reliability,
• dds::core::policy::DestinationOrder,
• dds::core::policy::History,
• dds::core::policy::ResourceLimits,
• dds::core::policy::TransportPriority,
• dds::core::policy::Lifespan,
• dds::core::policy::Ownership,
• dds::core::policy::DataRepresentation

To get or set policies use the policy() getters and setters or operator << (see examples).

You must set certain members in a consistent manner:

length of dds::topic::qos::TopicQos::topic_data .value <= dds::domain::qos::DomainParticipantQos::resource_limits .topic_data_max_length

If any of the above are not true, dds::topic::Topic::qos(const dds::topic::qos::TopicQos&), dds::topic::Topic::qos() and dds::domain::DomainParticipant::default_topic_qos will fail with dds::core::InconsistentPolicyError and the dds::topic::Topic constructors will fail with dds::core::Error

Entity:

dds::topic::Topic

See also

QoS Policies allowed ranges within each Qos.

Qos Use Cases

Constructor & Destructor Documentation

TopicQos()

dds::topic::qos::TopicQos::TopicQos ( )

inline

Creates a TopicQos with the default value for each policy.

Member Function Documentation

policy() [1/3]

template<typename POLICY >

const POLICY& dds::topic::qos::TopicQos::policy

(

)

const

Gets a QoS policy by const reference.

Template Parameters

Policy

One of the TopicQos Policies

See also

Setting Qos Values

policy() [2/3]

template<typename POLICY >

POLICY& dds::topic::qos::TopicQos::policy

(

)

Gets a QoS policy by reference.

Template Parameters

Policy

One of the TopicQos Policies

See also

Setting Qos Values

policy() [3/3]

template<typename Policy >

TopicQos& dds::topic::qos::TopicQos::policy ( const Policy &  p )

inline

Sets a policy.

See also

policy()

Setting Qos Values

operator<<()

template<typename Policy >

TopicQos& dds::topic::qos::TopicQos::operator<< ( const Policy &  p )

inline

Sets a policy.

See also

policy()

Setting Qos Values

operator>>()

template<typename Policy >

const TopicQos& dds::topic::qos::TopicQos::operator>> ( Policy &  p ) const

inline

Copies the values of a policy.

Parameters

p	The destination where to copy the current value of the Policy

See also

policy()

Setting Qos Values

References rti::topic::to_string().

Friends And Related Function Documentation

to_string() [1/3]

std::string to_string ( const TopicQos &  qos, const rti::core::QosPrintFormat &  format = rti::core::QosPrintFormat()  )

related

<<extension>> Obtains a string representation of the dds::topic::qos::TopicQos

Parameters

qos	The qos object to convert to a string
format	The optional print format used to format the output string.

The several to_string overloads allow formatting the output and printing only the differences with respect to another Qos object.

TopicQos qos;

// When no QosPrintFormat is supplied, the default is used. Similarly, since
// no base profile has been specified we will only print the differences
// with respect to the documented default for TopicQos
std::string str = to_string(qos);

// In this overload we are specifying the print format used to format the output
// string.
QosPrintFormat format; // ...;
str = to_string(qos, format);

// Here, the differences between qos and base will be included in the output
// string. If the two qos objects are the same, the resulting string will
// be empty.
TopicQos base; // ...;
str = to_string(qos, base);
// We could also specify the format at this point
str = to_string(qos, base, format);

// Instead of supplying a base profile, the sentinel value qos_print_all can
// be supplied. This will result in the entire Qos object being printed (as
// opposed to only the differences with respect to a base qos).
str = to_string(qos, qos_print_all);

This overload uses the default print format and only prints the differences between qos and the documented default.

Returns

The string representation of the qos

to_string() [2/3]

std::string to_string ( const TopicQos &  qos, const TopicQos &  base, const rti::core::QosPrintFormat &  format = rti::core::QosPrintFormat()  )

related

<<extension>> Obtains a string representation of the dds::topic::qos::TopicQos

Parameters

qos	The qos object to convert to a string
base	The base qos. Only the differences between base and qos are included in the output string. If you want to print everything within the QoS, use the overload that accepts a rti::core::qos_print_all_t.
format	The optional print format used to format the output string.

This overload prints the differences between qos and base. If no print format is specified, the default will be used.

Returns

The string representation of the qos

to_string() [3/3]

std::string to_string ( const TopicQos &  qos, const rti::core::qos_print_all_t &  qos_print_all, const rti::core::QosPrintFormat &  format = rti::core::QosPrintFormat()  )

related

<<extension>> Obtains a string representation of the dds::topic::qos::TopicQos

Parameters

qos	The qos object to convert to a string
qos_print_all	The sentinel value indicating that the entire QoS should be converted to a string. The other overloads of this API only print the differences with respect to a base profile, or to the documented default.
format	The optional print format used to format the output string.

This overload prints all of the policies within qos. If no print format is specified, the default will be used.

The only valid value for the qos_print_all argument is rti::core::qos_print_all

For example:

to_string(qos, rti::core::qos_print_all);

Returns

The string representation of the qos

operator<<()

std::ostream & operator<< ( std::ostream &  out, const rti::topic::qos::TopicQos &  qos  )

related

<<extension>> Prints a dds::topic::qos::TopicQos to an output stream.