Content Filtering

Use these QoS fields if you are using content filtering on your data.

Use these QoS fields if you are using content filtering on your data.

Content filtering most commonly refers to using a dds::topic::ContentFilteredTopic, but data can also be filtered using rti::sub::TopicQuery to run a new filter over the data in a DataWriter's cache, or dds::sub::cond::QueryCondition to read a subset of the data that is currently stored in the DataReader's cache.

See also

Queries and Filters Syntax.

Advanced Settings

rti::core::policy::DataReaderResourceLimits	max_query_condition_filters
	<<extension>> The maximum number of query condition filters a reader is allowed.
rti::core::policy::DataWriterResourceLimits	max_remote_reader_filters
	<<extension>> The maximum number of remote DataReaders for which the dds::pub::DataWriter will perform content-based filtering.
rti::core::policy::DomainParticipantResourceLimits	content_filtered_topic_allocation
	<<extension>> Allocation settings applied to content filtered topic.
rti::core::policy::DomainParticipantResourceLimits	content_filter_allocation
	<<extension>> Allocation settings applied to content filter.
rti::core::policy::DomainParticipantResourceLimits	query_condition_allocation
	<<extension>> Allocation settings applied to query condition pool.
rti::core::policy::DomainParticipantResourceLimits	content_filtered_topic_hash_buckets
	[DEPRECATED] <<extension>> Number of hash buckets for content filtered topics.
rti::core::policy::DomainParticipantResourceLimits	content_filter_hash_buckets
	[DEPRECATED] <<extension>> Number of hash buckets for content filters.
rti::core::policy::DomainParticipantResourceLimits	contentfilter_property_max_length
	<<extension>> This field is the maximum length of all data related to a Content-filtered topic.
rti::core::policy::DomainParticipantResourceLimits	channel_seq_max_length
	<<extension>> Maximum number of channels that can be specified in rti::core::policy::MultiChannel for MultiChannel DataWriters.
rti::core::policy::DomainParticipantResourceLimits	channel_filter_expression_max_length
	<<extension>> Maximum length of a channel rti::core::ChannelSettings::filter_expression in a MultiChannel DataWriter.
rti::core::ChannelSettings	multicast_settings
	<<extension>> A sequence of rti::core::TransportMulticastSettings used to configure the multicast addresses associated with a channel.
rti::core::ChannelSettings	filter_expression
	<<extension>> A logical expression used to determine the data that will be published in the channel.
rti::core::policy::MultiChannel	filter_name
	<<extension>> Name of the filter class used to describe the filter expressions of a MultiChannel DataWriter.