Class: Etna::Clients::Metis::MetisUploadWorkflow::Upload

Inherits:
Struct
  • Object
show all
Defined in:
lib/etna/clients/metis/workflows/metis_upload_workflow.rb

Constant Summary collapse

INITIAL_BLOB_SIZE = 
2 ** 10
MAX_BLOB_SIZE = 
2 ** 22
ZERO_HASH = 
'd41d8cd98f00b204e9800998ecf8427e'

Instance Method Summary collapse

Constructor Details

#initialize(**args) ⇒ Upload

Returns a new instance of Upload.



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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 98

def initialize(**args)
  super
  self.next_blob_size = [file_size, INITIAL_BLOB_SIZE].min
  self.current_byte_position = 0
end

Instance Method Details

#advance_position! ⇒ Object 



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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 108

def advance_position!
  self.current_byte_position = self.current_byte_position + self.next_blob_size
  self.next_blob_size = [
      MAX_BLOB_SIZE,
      # in fact we should stop when we hit the end of the file
      file_size - current_byte_position
  ].min
end

#complete? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 117

def complete?
  current_byte_position >= file_size
end

#file_size ⇒ Object 



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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 104

def file_size
  ::File.size(source_file)
end

#next_blob_bytes ⇒ Object 



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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 125

def next_blob_bytes
  IO.binread(source_file, next_blob_size, current_byte_position)
end

#next_blob_hash ⇒ Object 



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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 121

def next_blob_hash
  Digest::MD5.hexdigest(next_blob_bytes)
end

#resume_from!(upload_response) ⇒ Object 



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# File 'lib/etna/clients/metis/workflows/metis_upload_workflow.rb', line 129

def resume_from!(upload_response)
  self.current_byte_position = upload_response.current_byte_position
  self.next_blob_size = upload_response.next_blob_size
end