true if the checkpoint has expired
true if this checkpoint can be used for a further job
the name for the file used as checkpoint
true if the files of this checkpoint are the result of a successful job
the path for the file used as checkpoint as a string
Important! This needs to be computed only once because it is used with an identity map in the filledSink attribute to determine if a sink has been filled or not
setup the checkpoint by possibly deleting/versioning the previous checkpoint file
store the output path of a Sink as a checkpoint