dds::sub::qos::DataReaderQos Class Reference

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

#include <dds/sub/qos/DataReaderQos.hpp>

Public Member Functions
	DataReaderQos ()
	Creates a DataReaderQos with the default value for each policy.
DataReaderQos &	operator= (const dds::topic::qos::TopicQos &topic_qos)
	Copies into this DataReaderQos those policies that are also in TopicQos.
template<typename POLICY >
const POLICY &	policy () const
	Gets a QoS policy by const reference.
template<typename POLICY >
POLICY &	policy ()
	Gets a QoS policy by reference.
template<typename Policy >
DataReaderQos &	policy (const Policy &p)
	Sets a policy.
template<typename Policy >
DataReaderQos &	operator<< (const Policy &p)
	Sets a policy.
template<typename Policy >
const DataReaderQos &	operator>> (Policy &p) const
	Copies the values of a policy.

Detailed Description

<<value-type>> Container of the QoS policies that a dds::sub::DataReader supports

DataReaderQos policies

A DataReaderQos contains the following policies:

• dds::core::policy::Durability,
• 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::UserData,
• dds::core::policy::Ownership,
• dds::core::policy::TimeBasedFilter,
• dds::core::policy::ReaderDataLifecycle,
• dds::core::policy::TransportPriority,
• dds::core::policy::TypeConsistencyEnforcement,
• rti::core::policy::DataReaderResourceLimits,
• rti::core::policy::DataReaderProtocol,
• rti::core::policy::TransportSelection,
• rti::core::policy::TransportUnicast,
• rti::core::policy::TransportMulticast,
• rti::core::policy::Property,
• rti::core::policy::Service,
• rti::core::policy::Availability,
• rti::core::policy::EntityName,
• rti::core::policy::TypeSupport

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

You must set certain members in a consistent manner:

dds::core::policy::Deadline .period >= dds::core::policy::TimeBasedFilter .minimum_separation

dds::core::policy::History .depth <= dds::core::policy::ResourceLimits .max_samples_per_instance

dds::core::policy::ResourceLimits .max_samples_per_instance <= dds::core::policy::ResourceLimits .max_samples dds::core::policy::ResourceLimits .initial_samples <= dds::core::policy::ResourceLimits .max_samples

dds::core::policy::ResourceLimits .initial_instances <= dds::core::policy::ResourceLimits .max_instances

rti::core::policy::DataReaderResourceLimits .initial_remote_writers_per_instance <= rti::core::policy::DataReaderResourceLimits .max_remote_writers_per_instance

rti::core::policy::DataReaderResourceLimits .initial_infos <= rti::core::policy::DataReaderResourceLimits .max_infos

rti::core::policy::DataReaderResourceLimits .max_remote_writers_per_instance <= rti::core::policy::DataReaderResourceLimits .max_remote_writers

rti::core::policy::DataReaderResourceLimits .max_samples_per_remote_writer <= dds::core::policy::ResourceLimits .max_samples

length of dds::core::policy::UserData .value <= dds::domain::qos::DomainParticipantQos::resource_limits .reader_user_data_max_length

If any of the above are not true, dds::sub::DataReader::qos(const dds::sub::qos::DataReaderQos&) will fail with dds::core::InconsistentPolicyError

See Also

Qos Use Cases

Constructor & Destructor Documentation

dds::sub::qos::DataReaderQos::DataReaderQos ( )

inline

Creates a DataReaderQos with the default value for each policy.

Member Function Documentation

DataReaderQos& dds::sub::qos::DataReaderQos::operator= ( const dds::topic::qos::TopicQos &  topic_qos )

inline

Copies into this DataReaderQos those policies that are also in TopicQos.

Parameters

topic_qos

The TopicQos to copy the common policies from.

template<typename POLICY >

const POLICY& dds::sub::qos::DataReaderQos::policy

(

)

const

Gets a QoS policy by const reference.

Template Parameters

Policy

One of the DataReaderQos policies

See Also

Setting Qos Values

template<typename POLICY >

POLICY& dds::sub::qos::DataReaderQos::policy

(

)

Gets a QoS policy by reference.

Template Parameters

Policy

One of the DataReaderQos policies

See Also

Setting Qos Values

template<typename Policy >

DataReaderQos& dds::sub::qos::DataReaderQos::policy ( const Policy &  p )

inline

Sets a policy.

See Also

policy()

Setting Qos Values

template<typename Policy >

DataReaderQos& dds::sub::qos::DataReaderQos::operator<< ( const Policy &  p )

inline

Sets a policy.

See Also

policy()

Setting Qos Values

template<typename Policy >

const DataReaderQos& dds::sub::qos::DataReaderQos::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