Class: SimpleBigtableClient

Inherits:
Object
  • Object
show all
Defined in:
lib/simple_bigtable_client.rb,
lib/simple_bigtable_client/version.rb

Constant Summary collapse

VERSION = 
"0.1.0"

Instance Method Summary collapse

Constructor Details

#initialize(instance, project_id: ENV['GOOGLE_CLOUD_PROJECT'], bigtable_client: Google::Cloud::Bigtable::V2.new) ⇒ SimpleBigtableClient

Returns a new instance of SimpleBigtableClient.



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# File 'lib/simple_bigtable_client.rb', line 5

def initialize(instance, project_id: ENV['GOOGLE_CLOUD_PROJECT'], bigtable_client: Google::Cloud::Bigtable::V2.new)
  @instance = instance
  @bigtable_client = bigtable_client
  @project_id = project_id
end

Instance Method Details

#mutate_rows(table, column_family, enumerator, slice_size: 100_000) ⇒ Object 



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# File 'lib/simple_bigtable_client.rb', line 44

def mutate_rows(table, column_family, enumerator, slice_size: 100_000)
  enumerator.each_slice(slice_size) do |slice|
    entries = slice.map do |row_key, cells|
      {
        row_key: row_key.to_s,
        mutations: cells.map do |column_qualifier, value|
          {
            set_cell: {
              column_qualifier: column_qualifier.to_s,
              family_name: column_family,
              value: value.to_s
            }
          }
        end
      }
    end
    @bigtable_client.mutate_rows(table_name(table), entries).each do |element|
      yield element if block_given?
    end
  end
end

#read_rows(table, column_family, rows: nil, filter: nil, limit: nil, options: nil) ⇒ Object 



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# File 'lib/simple_bigtable_client.rb', line 11

def read_rows(table, column_family, rows: nil, filter: nil, limit: nil, options: nil)
  return to_enum(
    __method__,
    table,
    column_family,
    rows: rows,
    filter: filter,
    limit: limit,
    options: options
  ) unless block_given?
  cell_chunk_enumerator = @bigtable_client.read_rows(
    table_name(table),
    rows: rows,
    filter: filter,
    rows_limit: limit,
    options: options
  )
  prev_row_key = nil
  row_enumerator = cell_chunk_enumerator.lazy.flat_map(&:chunks).chunk do |cell_chunk|
    if cell_chunk.row_key == ""
      prev_row_key
    else
      prev_row_key = cell_chunk.row_key
    end
  end
  row_enumerator.each do |row_key, cell_chunks|
    row = cell_chunks.each_with_object(_row_key: row_key) do |cell_chunk, acc|
      acc[cell_chunk.qualifier.value.to_sym] = cell_chunk.value
    end
    yield(row)
  end
end