Method: MQTT::Client#publish
- Defined in:
- lib/mqtt/client.rb
#publish(topics, payload = nil, retain: false, qos: 0) ⇒ Object
Publish a message on a particular topic to the MQTT server.
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# File 'lib/mqtt/client.rb', line 355 def publish(topics, payload = nil, retain: false, qos: 0) if topics.is_a?(Hash) && !payload.nil? raise ArgumentError, 'Payload cannot be passed if passing a hash for topics and payloads' end raise NotConnectedException unless connected? if @batch_publish && qos != 0 values = @batch_publish[{ retain: retain, qos: qos }] ||= {} if topics.is_a?(Hash) values.merge!(topics) else values[topics] = payload end return end pending_acks = [] topics = { topics => payload } unless topics.is_a?(Hash) topics.each do |(topic, topic_payload)| raise ArgumentError, 'Topic name cannot be nil' if topic.nil? raise ArgumentError, 'Topic name cannot be empty' if topic.empty? packet = MQTT::Packet::Publish.new( id: next_packet_id, qos: qos, retain: retain, topic: topic, payload: topic_payload ) pending_acks << register_for_ack(packet) unless qos.zero? # Send the packet send_packet(packet) end return if qos.zero? pending_acks.each do |ack| wait_for_ack(ack) end nil end |