Class: Etna::Filesystem::Metis

Inherits:
Filesystem
  • Object
show all
Defined in:
lib/etna/filesystem.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(metis_client:, project_name:, bucket_name:, root: '/', uuid: SecureRandom.uuid) ⇒ Metis

Returns a new instance of Metis.



108
109
110
111
112
113
114
 
# File 'lib/etna/filesystem.rb', line 108

def initialize(metis_client:, project_name:, bucket_name:, root: '/', uuid: SecureRandom.uuid)
  @metis_client = metis_client
  @project_name = project_name
  @bucket_name = bucket_name
  @root = root
  @metis_uid = uuid
end

Instance Attribute Details

#bucket_name ⇒ Object (readonly)

Returns the value of attribute bucket_name.



106
107
108
 
# File 'lib/etna/filesystem.rb', line 106

def bucket_name
  @bucket_name
end

#project_name ⇒ Object (readonly)

Returns the value of attribute project_name.



106
107
108
 
# File 'lib/etna/filesystem.rb', line 106

def project_name
  @project_name
end

Instance Method Details

#create_download_workflow ⇒ Object 



179
180
181
 
# File 'lib/etna/filesystem.rb', line 179

def create_download_workflow
  Etna::Clients::Metis::MetisDownloadWorkflow.new(metis_client: @metis_client, project_name: @project_name, bucket_name: @bucket_name, max_attempts: 3)
end

#create_upload_workflow ⇒ Object 



121
122
123
 
# File 'lib/etna/filesystem.rb', line 121

def create_upload_workflow
  Etna::Clients::Metis::MetisUploadWorkflow.new(metis_client: @metis_client, metis_uid: @metis_uid, project_name: @project_name, bucket_name: @bucket_name, max_attempts: 3)
end

#do_streaming_download(wp, metis_file) ⇒ Object 



183
184
185
 
# File 'lib/etna/filesystem.rb', line 183

def do_streaming_download(wp, metis_file)
  create_download_workflow.do_download(wp, metis_file)
end

#do_streaming_upload(rp, dest, size_hint) ⇒ Object 



165
166
167
168
169
170
171
 
# File 'lib/etna/filesystem.rb', line 165

def do_streaming_upload(rp, dest, size_hint)
  streaming_upload = Etna::Clients::Metis::MetisUploadWorkflow::StreamingIOUpload.new(readable_io: rp, size_hint: size_hint)
  create_upload_workflow.do_upload(
      streaming_upload,
      metis_path_of(dest)
  )
end

#exist?(src) ⇒ Boolean

Returns:

  • (Boolean) 


214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
 
# File 'lib/etna/filesystem.rb', line 214

def exist?(src)
  begin
    response = list_metis_directory(::File.dirname(src))
  rescue Etna::Error => e
    if e.status == 404
      return false
    elsif e.message =~ /Invalid folder/
      return false
    end

    raise e
  end

  response.files.all.any? { |f| f.file_name == ::File.basename(src) } ||
      response.folders.all.any? { |f| f.folder_name == ::File.basename(src) }
end

#list_metis_directory(path) ⇒ Object 



196
197
198
 
# File 'lib/etna/filesystem.rb', line 196

def list_metis_directory(path)
  @metis_client.list_folder(Etna::Clients::Metis::ListFolderRequest.new(project_name: @project_name, bucket_name: @bucket_name, folder_path: metis_path_of(path)))
end

#ls(dir) ⇒ Object 



209
210
211
212
 
# File 'lib/etna/filesystem.rb', line 209

def ls(dir)
  response = list_metis_directory(::File.dirname(dir))
  response.files.map { |f| [:file, f.file_name] } + response.folders.map { |f| [:folder, f.folder_name] }
end

#metis_path_of(path) ⇒ Object 



116
117
118
119
 
# File 'lib/etna/filesystem.rb', line 116

def metis_path_of(path)
  joined = ::File.join(@root, path)
  joined[0] == "/" ? joined.slice(1..-1) : joined
end

#mkdir_p(dir) ⇒ Object 



200
201
202
203
204
205
206
207
 
# File 'lib/etna/filesystem.rb', line 200

def mkdir_p(dir)
  create_folder_request = Etna::Clients::Metis::CreateFolderRequest.new(
      project_name: @project_name,
      bucket_name: @bucket_name,
      folder_path: metis_path_of(dir),
  )
  @metis_client.create_folder(create_folder_request)
end

#with_hot_pipe(opts, receiver, *args, &block) ⇒ Object 



125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
 
# File 'lib/etna/filesystem.rb', line 125

def with_hot_pipe(opts, receiver, *args, &block)
  rp, wp = IO.pipe
  begin
    executor = Concurrent::SingleThreadExecutor.new(fallback_policy: :abort)
    begin
      if opts.include?('w')
        future = Concurrent::Promises.future_on(executor) do
          self.send(receiver, rp, *args)
        rescue => e
          Etna::Application.instance.logger.log_error(e)
          raise e
        ensure
          rp.close
        end

        yield wp
      else
        future = Concurrent::Promises.future_on(executor) do
          self.send(receiver, wp, *args)
        rescue => e
          Etna::Application.instance.logger.log_error(e)
          raise e
        ensure
          wp.close
        end

        yield rp
      end

      future.wait!
    ensure
      executor.shutdown
      executor.kill unless executor.wait_for_termination(5)
    end
  ensure
    rp.close
    wp.close
  end
end

#with_readable(src, opts = 'r', &block) ⇒ Object 



187
188
189
190
191
192
193
194
 
# File 'lib/etna/filesystem.rb', line 187

def with_readable(src, opts = 'r', &block)
  metis_file = list_metis_directory(::File.dirname(src)).files.all.find { |f| f.file_name == ::File.basename(src) }
  raise "Metis file at #{@project_name}/#{@bucket_name}/#{@root}/#{src} not found.  No such file" if metis_file.nil?

  self.with_hot_pipe(opts, :do_streaming_download, metis_file) do |rp|
    yield rp
  end
end

#with_writeable(dest, opts = 'w', size_hint: nil, &block) ⇒ Object 



173
174
175
176
177
 
# File 'lib/etna/filesystem.rb', line 173

def with_writeable(dest, opts = 'w', size_hint: nil, &block)
  self.with_hot_pipe(opts, :do_streaming_upload, dest, size_hint) do |wp|
    yield wp
  end
end