Class: Filbunke::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/filbunke/client.rb

Constant Summary collapse

UPDATES_ACTION = 
'updates'
FILES_ACTION = 
'files'
LAST_CHECKPOINT_ACTION = 
'last_checkpoint'
TOUCH_ACTION = 
'touch'
URL_KEY = 
'url'
FROM_CHECKPOINT_KEY = 
'from_checkpoint'
HASH_KEY = 
'hash'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(repository, logger, callbacks = [], failed_request_log_file_name = nil) ⇒ Client

Returns a new instance of Client.



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# File 'lib/filbunke/client.rb', line 15

def initialize(repository, logger, callbacks = [], failed_request_log_file_name = nil)
  @repository = repository
  @logger = logger
  @callbacks = callbacks
  @failed_request_log_file_name = failed_request_log_file_name
  @hydra = Typhoeus::Hydra.new(:max_concurrency => @repository.hydra_concurrency)

  @logger.info "initialized client for repository '#{@repository.name}';  #{@repository.inspect}"
end

Instance Attribute Details

#repository ⇒ Object (readonly)

Returns the value of attribute repository.



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# File 'lib/filbunke/client.rb', line 4

def repository
  @repository
end

Instance Method Details

#fetch_remote_last_checkpoint ⇒ Object 



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# File 'lib/filbunke/client.rb', line 162

def fetch_remote_last_checkpoint
  last_checkpoint_http = Net::HTTP.new(@repository.host, @repository.port)
  last_checkpoint_http.start do |http|
    last_checkpoint_path = "/#{UPDATES_ACTION}/#{@repository.name}/#{LAST_CHECKPOINT_ACTION}"
    request = Net::HTTP::Get.new(Addressable::URI.encode(last_checkpoint_path))
    response = http.request(request)
    if response.code.to_i != 200
      raise "Failed to get last checkpoint for repository: #{@repository.name}"
    end
    return response.body.chomp.to_i
  end
end

#register_deleted_file!(path) ⇒ Object 



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# File 'lib/filbunke/client.rb', line 133

def register_deleted_file!(path)
  register_path = "/#{FILES_ACTION}/#{@repository.name}/#{path}"
  begin
    register_http = Net::HTTP.new(@repository.host, @repository.port)
    register_http.start do |http|
      request = Net::HTTP::Delete.new(Addressable::URI.encode(register_path))
      response = http.request(request)
      if response.code.to_i != 204
        raise "Failed to register deleted file: #{path}"
      end
    end
  rescue Exception => e
    log_failed_request(%Q{curl -XDELETE "http://#{@repository.host}:#{@repository.port}#{register_path}"}, e)
    raise e
  end
end

#register_updated_file!(path, url, hash = nil) ⇒ Object 



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# File 'lib/filbunke/client.rb', line 115

def register_updated_file!(path, url, hash = nil)
  register_path = "/#{FILES_ACTION}/#{@repository.name}/#{path}?#{URL_KEY}=#{url}"
  register_path += "&#{HASH_KEY}=#{hash}" if hash
  begin
    register_http = Net::HTTP.new(@repository.host, @repository.port)
    register_http.start do |http|
      request = Net::HTTP::Put.new(Addressable::URI.encode(register_path))
      response = http.request(request)
      if response.code.to_i != 204
        raise "Failed to register updated file: #{path}"
      end
    end
  rescue Exception => e
    log_failed_request(%Q{curl -XPUT "http://#{@repository.host}:#{@repository.port}#{register_path}"}, e)
    raise e
  end
end

#touch_repository! ⇒ Object 



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# File 'lib/filbunke/client.rb', line 150

def touch_repository!
  touch_http = Net::HTTP.new(@repository.host, @repository.port)
  touch_http.start do |http|
    touch_path = "/#{UPDATES_ACTION}/#{@repository.name}/#{TOUCH_ACTION}"
    request = Net::HTTP::Put.new(Addressable::URI.encode(touch_path))
    response = http.request(request)
    if response.code.to_i != 204
      raise "Failed to touch repository: #{@repository.name}"
    end
  end
end

#update_files!(last_checkpoint) ⇒ Object 



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# File 'lib/filbunke/client.rb', line 111

def update_files!(last_checkpoint)
  with_updated_files(last_checkpoint) {}
end

#with_updated_files(last_checkpoint) ⇒ Object 



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# File 'lib/filbunke/client.rb', line 25

def with_updated_files(last_checkpoint)
  updates = get_updated_file_list(last_checkpoint)
  updated_files = updates["files"] || []
  new_checkpoint = updates["checkpoint"]
  if updated_files.empty?
    if updates.key?("files")
      return begin
        fetch_remote_last_checkpoint
      rescue => e
        @logger.warn "Failed to fetch remote last_checkpoint #{@repository.name} will fall back to local last_checkpoint=#{last_checkpoint}"
        last_checkpoint
      end
    else
      return last_checkpoint
    end
  end
  @logger.info "Updating repository: #{@repository.name}: #{updated_files.size} files. Checkpoint: #{last_checkpoint} ==> #{new_checkpoint}"

  @async_requests = []
  callbacks_on_update = []
  callbacks_on_no_change = []
  callbacks_on_delete = []
  has_update_file_failure = false
  updated_files.each do |raw_file|
    file = File.new(raw_file)
    local_file_path = ::File.join(@repository.local_path, file.path)
    if file.state == "DELETED" then
      delete_file!(local_file_path)
      callbacks_on_delete << OpenStruct.new({ :file => file, :local_file_path => local_file_path })
    else
      if file_needs_update?(file, local_file_path)
        if update_file!(file, local_file_path) then
          yield file
          callbacks_on_update << OpenStruct.new({ :file => file, :local_file_path => local_file_path })
        else
          @logger.error "Unable to fetch file #{file.url} ==> #{file.path}!"
          has_update_file_failure = true
          break;
        end

      else
        @logger.debug "File exists with correct hash: #{local_file_path}"
        callbacks_on_no_change << OpenStruct.new({:file => file, :local_file_path => local_file_path})
      end
    end
  end

  if has_update_file_failure
    @logger.error "FAILED to fetch files for #{@repository.name}  last_checkpoint = #{last_checkpoint}"
    return last_checkpoint
  end
  @logger.info "Done setting up async requests for #{@repository.name}, starting fetch..."

  has_fetch_files_failure = begin
    @hydra.run
    @async_requests.any? do |request|
      @logger.warn "request did not handle response: #{request.inspect}" if request.response.nil? || request.response.code != 200
      request.response.nil? || request.response.code != 200
    end
  rescue RuntimeError, SystemCallError, StandardError => e
    msg = ["#{e.class} - #{e.message}", *e.backtrace].join("\n\t")
    @logger.error "FAILED to fetch files for #{@repository.name}  last_checkpoint = #{last_checkpoint}; #{msg}"
    true
  end

  if has_fetch_files_failure
    @logger.error "FAILED to update files for #{@repository.name}  last_checkpoint = #{last_checkpoint}"
    return last_checkpoint
  end

  @logger.info "Done fetching files for #{@repository.name}, processing callbacks..."
  new_or_last_checkpoint = begin
    run_callbacks_delete(callbacks_on_delete)
    run_callbacks(callbacks_on_update)
    run_callbacks_no_change(callbacks_on_no_change)

    new_checkpoint || last_checkpoint
  rescue RuntimeError, SystemCallError, StandardError => e
    msg = ["#{e.class} - #{e.message}", *e.backtrace].join("\n\t")
    @logger.error "FAILED to process callbacks for #{@repository.name}  last_checkpoint = #{last_checkpoint}; #{msg}"
    last_checkpoint
  end

  new_or_last_checkpoint
end