2.2.2.1 Methods for Interface IChannelStreamingConsumer

start

Start the protocol. For a SimpleStreamer, this message indicates it should start streaming data.

(in) eventData: Start

channelDescribe

Sent from a consumer to a producer to request metadata about one or more channels, specified by URI.

(in) eventData: ChannelDescribe

channelStreamingStart

Sent from a consumer to a producer to request that the producer begin streaming one or more channels.

(in) eventData: ChannelStreamingStart

channelStreamingStop

Sent from a consumer to a producer to request that streaming be discontinued on one or more channels.

(in) eventData: ChannelStreamingStop

channelRangeRequest

Sent from a consumer to a producer to request data over a specific range for one or more channels.

(in) eventData: ChannelRangeRequest

onChannelMetadata

Sent from a producer to a consumer to describe channels that may be streamed to the consumer in future messages.

event

(in) eventData: ChannelMetadata

onChannelData

Contains an array of <index,value> 2-tuples for one or more channels.

event

(in) eventData: ChannelData

onChannelRemove

Sent from a producer to a consumer to indicate that a channel is no longer actively streaming data. When a channel has been removed, a producer MUST NOT send additional ChannelData messages on this channel. ChannelRemove is sent regardless of the value of receiveChangeNotification field in the ChannelStreamingInfo record used to start this channel.

event

(in) eventData: ChannelRemove

onChannelDataChange

Sent from a producer to a consumer to notify the consumer of changed data points on the channel. Only sent if the receiveChangeNotification field in ChannelStreamingInfo record used to start this channel is set to True.

event

(in) eventData: ChannelDataChange

onChannelStatusChange

Sent from a producer to a consumer when the status of a channel (as defined in the status field of the ChannelMetadataRecord) has changed. Only sent if the recieveChangeNotification field in ChannelStreamingInfo record used to start this channel is set to True.

event

(in) eventData: ChannelStatusChange