gets the topic name of the topic this messagepipeline is configured with . concode_field_sep MessageServiceClient messageServiceClient concode_elem_sep String topicName concode_elem_sep PublishTask publishTask concode_elem_sep Message message concode_elem_sep Object messageLock concode_elem_sep Log LOG concode_field_sep void enqueue concode_elem_sep void publish
String function ( ) { return topicName ; }