cleanup the channel, given the current output format
copy all outputs files to the destinations specified by sink files
copy the success file to the destinations specified by sink files
sequence of all the nodes which may require some input data to be loaded, like a ParallelDo used as a reducer and needing its environment
output nodes for this channel
all the ProcessNodes for this channel
reduce key/values, given the current output format
setup the nodes of the channel before writing data
sequence of the bridgeStore + additional sinks of the last node of the output channel
unique identifier for the Channel
An OutputChannel is responsible for emitting key/values grouped by one Gbk or passed through from an InputChannel with no grouping
Two OutputChannels are equal if they have the same tag. This tag is the id of the last processing node of the channel