Class: Rake::HDFSFileTask

Inherits:
Task
  • Object
show all
Defined in:
lib/rake_hdfs/hdfs_file_task.rb

Overview

A FileTask is a task that includes time based dependencies. If any of a FileTask’s prerequisites have a timestamp that is later than the file represented by this task, then the file must be rebuilt (using the supplied actions).

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.scope_name(scope, task_name) ⇒ Object

Apply the scope to the task name according to the rules for this kind of task. File based tasks ignore the scope when creating the name.



41
42
43
 
# File 'lib/rake_hdfs/hdfs_file_task.rb', line 41

def scope_name(scope, task_name)
  Rake.from_pathname(task_name)
end

Instance Method Details

#needed? ⇒ Boolean

Is this file task needed? Yes if it doesn’t exist, or if its time stamp is out of date.

Returns:

  • (Boolean) 


15
16
17
 
# File 'lib/rake_hdfs/hdfs_file_task.rb', line 15

def needed?
  ! WebHDFS::FileUtils.exist?(name) || out_of_date?(timestamp) || @application.options.build_all
end

#timestamp ⇒ Object

Time stamp for file task.



20
21
22
23
24
25
26
 
# File 'lib/rake_hdfs/hdfs_file_task.rb', line 20

def timestamp
  if WebHDFS::FileUtils.exist?(name)
    WebHDFS::FileUtils.mtime(name.to_s)
  else
    Rake::LATE
  end
end