DDS::ReadCondition Class Reference
[Read Conditions]

<<interface>> Conditions specifically dedicated to read operations and attached to one DDS::DataReader. More...

#include <managed_subscription.h>

Inheritance diagram for DDS::ReadCondition:

List of all members.

Public Member Functions
System::UInt32	get_sample_state_mask ()
	Retrieves the set of sample_states for the condition.
System::UInt32	get_view_state_mask ()
	Retrieves the set of view_states for the condition.
System::UInt32	get_instance_state_mask ()
	Retrieves the set of instance_states for the condition.
DataReader^	get_datareader ()
	Returns the DDS::DataReader associated with the DDS::ReadCondition.
virtual System::Boolean	get_trigger_value () override
	Retrieve the trigger_value.

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Detailed Description

<<interface>> Conditions specifically dedicated to read operations and attached to one DDS::DataReader.

DDS::ReadCondition objects allow an application to specify the data samples it is interested in (by specifying the desired sample_states, view_states as well as instance_states in DDS::TypedDataReader::read and DDS::TypedDataReader::take variants.

This allows RTI Data Distribution Service to enable the condition only when suitable information is available. They are to be used in conjunction with a WaitSet as normal conditions.

More than one DDS::ReadCondition may be attached to the same DDS::DataReader.

Note: If you are using a ReadCondition simply to detect the presence of new data, consider using a DDS::StatusCondition with the DATA_AVAILABLE_STATUS instead, which will perform better in this situation.

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Member Function Documentation

System::UInt32 DDS::ReadCondition::get_sample_state_mask

(

)

Retrieves the set of sample_states for the condition.

System::UInt32 DDS::ReadCondition::get_view_state_mask

(

)

Retrieves the set of view_states for the condition.

System::UInt32 DDS::ReadCondition::get_instance_state_mask

(

)

Retrieves the set of instance_states for the condition.

DataReader ^ DDS::ReadCondition::get_datareader

(

)

Returns the DDS::DataReader associated with the DDS::ReadCondition.

There is exactly one DDS::DataReader assicated with each DDS::ReadCondition.

Returns:

DDS::DataReader associated with the DDS::ReadCondition.

virtual System::Boolean DDS::ReadCondition::get_trigger_value

(

)

[override, virtual]

Retrieve the trigger_value.

Returns:

the trigger value.

Implements DDS::Condition.

Reimplemented in DDS::QueryCondition.