Class: BigqueryMigration::BigqueryWrapper

Inherits:
Object
  • Object
show all
Defined in:
lib/bigquery_migration/bigquery_wrapper.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, opts = {}) ⇒ BigqueryWrapper

Returns a new instance of BigqueryWrapper.



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 19

def initialize(config, opts = {})
  @config = HashUtil.deep_symbolize_keys(config)
  @opts = HashUtil.deep_symbolize_keys(opts)
  configure
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 13

def config
  @config
end

Instance Method Details

#client ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 87

def client
  return @cached_client if @cached_client && @cached_client_expiration > Time.now

  client = Google::Apis::BigqueryV2::BigqueryService.new
  client.request_options.retries = config[:retries]
  client.request_options.timeout_sec = config[:timeout_sec]
  client.request_options.open_timeout_sec = config[:open_timeout_sec]
  logger.debug { "client_options: #{client.client_options.to_h}" }
  logger.debug { "request_options: #{client.request_options.to_h}" }

  scope = "https://www.googleapis.com/auth/bigquery"

  key = StringIO.new(config[:json_key])
  auth = Google::Auth::ServiceAccountCredentials.make_creds(json_key_io: key, scope: scope)
  client.authorization = auth

  @cached_client_expiration = Time.now + 1800
  @cached_client = client
end

#configure ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 25

def configure
  if json_keyfile = config[:json_keyfile]
    json_key =
      case json_keyfile
      when String
        File.read(json_keyfile)
      when Hash
        json_keyfile[:content]
      else
        raise ConfigError.new "Unsupported json_keyfile type"
      end
    json_keyparams =
      begin
        case json_key
        when String
          HashUtil.deep_symbolize_keys(JSON.parse(json_key))
        when Hash
          HashUtil.deep_symbolize_keys(json_key)
        end
      rescue => e
        raise ConfigError.new "json_keyfile is not a JSON file"
      end
  end

  if json_keyparams
    config[:project] ||= json_keyparams[:project_id]
    config[:json_key] = json_keyparams.to_json
  end

  config[:retries] ||= 5
  config[:timeout_sec] ||= 300
  config[:open_timeout_sec] ||= 300
end

#copy_table(destination_table:, destination_dataset: nil, source_table: nil, source_dataset: nil, write_disposition: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 489

def copy_table(destination_table:, destination_dataset: nil, source_table: nil, source_dataset: nil, write_disposition: nil)
  source_table ||= self.table
  source_dataset ||= self.dataset
  destination_dataset ||= source_dataset
  write_disposition ||= 'WRITE_TRUNCATE'

  body = {
    job_reference: {
      project_id: self.project,
      job_id: "job_#{SecureRandom.uuid}",
    },
    configuration: {
      copy: {
        create_deposition: 'CREATE_IF_NEEDED',
        write_disposition: write_disposition,
        source_table: {
          project_id: project,
          dataset_id: source_dataset,
          table_id: source_table,
        },
        destination_table: {
          project_id: project,
          dataset_id: destination_dataset,
          table_id: destination_table,
        },
      }
    }
  }
  opts = {}

  logger.info  { "#{head}insert_job(#{project}, #{body}, #{opts})" }
  unless dry_run?
    response = client.insert_job(project, body, opts)
    get_response = wait_load('copy', response)
  end

  {
    responses: {
      insert_job: response,
      last_get_job: get_response,
    }
  }
end

#dataset ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 63

def dataset
  @dataset ||= config[:dataset] || raise(ConfigError, '`dataset` is required.')
end

#delete_table(dataset: nil, table: nil) ⇒ Object Also known as: drop_table 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 235

def delete_table(dataset: nil, table: nil)
  dataset ||= self.dataset
  table ||= self.table

  begin
    logger.info { "#{head}Delete (drop) table... #{project}:#{dataset}.#{table}" }
    unless dry_run?
      client.delete_table(project, dataset, table) # no response
      success = true
    end
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404 && /Not found:/ =~ e.message
      # ignore 'Not Found' error
      return {}
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    raise Error, "Failed to delete_table(#{project}, #{dataset}, #{table}), response:#{response}"
  end

  { success: success }
end

#drop_column(table: nil, columns: nil, drop_columns: nil, backup_dataset: nil, backup_table: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 615

def drop_column(table: nil, columns: nil, drop_columns: nil, backup_dataset: nil, backup_table: nil)
  table ||= self.table
  backup_dataset ||= self.dataset
  if columns.nil? and drop_columns.nil?
    raise ArgumentError, '`drop_columns` or `columns` is required'
  end

  result = { responses: {} }

  before_columns = existing_columns

  if columns # if already given
    schema = Schema.new(columns)
  else
    schema = Schema.new(existing_columns)
    schema.reject_columns!(drop_columns)
  end
  if schema.empty? && !dry_run?
    raise Error, 'No column is remained'
  end

  schema.validate_permitted_operations!(before_columns)

  unless backup_dataset == self.dataset
    create_dataset(dataset: backup_dataset)
  end

  if backup_table
    _result = copy_table(source_table: table, destination_table: backup_table, destination_dataset: backup_dataset)
    result[:responses].merge!(_result[:responses])
  end

  unless (add_columns = schema.diff_columns_by_name(before_columns)).empty?
    _result = patch_table(add_columns: add_columns)
    result[:responses].merge!(_result[:responses])
  end

  query_fields = schema.build_query_fields(before_columns)
  query = "SELECT #{query_fields.join(',')} FROM [#{dataset}.#{table}]"
  _result = insert_select(query: query, destination_table: table)
  result[:responses].merge!(_result[:responses])

  after_columns = existing_columns

  result.merge!({before_columns: before_columns, after_columns: after_columns})
end

#dry_run? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 79

def dry_run?
  @opts[:dry_run]
end

#existing_columns ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 107

def existing_columns
  begin
    result = get_table
    response = result[:responses][:get_table]
    return [] unless response
    return [] unless response.schema
    return [] unless response.schema.fields
    response.schema.fields.map {|column| column.to_h }
  rescue NotFoundError
    return []
  end
end

#get_dataset(dataset: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 120

def get_dataset(dataset: nil)
  dataset ||= self.dataset
  begin
    logger.info { "Get dataset... #{project}:#{dataset}" }
    client.get_dataset(project, dataset)
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404
      raise NotFoundError, "Dataset #{project}:#{dataset} is not found"
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    raise Error, "Failed to get_dataset(#{project}, #{dataset}), response:#{response}"
  end

  { responses: { get_dataset: response } }
end

#get_table(dataset: nil, table: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 171

def get_table(dataset: nil, table: nil)
  dataset ||= self.dataset
  table ||= self.table
  begin
    logger.debug { "Get table... #{project}:#{dataset}.#{table}" }
    response = client.get_table(project, dataset, table)
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404 # not found
      raise NotFoundError, "Table #{project}:#{dataset}.#{table} is not found"
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    raise Error, "Failed to get_table(#{project}, #{dataset}, #{table}), response:#{response}"
  end

  result = {}
  if response
    result = {
      table_id: response.id,
      creation_time: response.creation_time.to_i, # millisec
      last_modified_time: response.last_modified_time.to_i, # millisec
      location: response.location,
      num_bytes: response.num_bytes.to_i,
      num_rows: response.num_rows.to_i,
    }
  end

  result.merge!({ responses: { get_table: response } })
end

#head ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 83

def head
  dry_run? ? '(DRY-RUN) ' : '(EXECUTE) '
end

#insert_all_table_data(dataset: nil, table: nil, rows:) ⇒ Object

rows:

- id: 1
  type: one
  record:
    child1: 'child1'
    child2: 'child2'
- id: 2
  type: two
  record:
    child1: 'child3'
    child2: 'child4'



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 328

def insert_all_table_data(dataset: nil, table: nil, rows: )
  dataset ||= self.dataset
  table ||= self.table

  begin
    logger.info { "#{head}insertAll tableData... #{project}:#{dataset}.#{table}" }
    body = {
      rows: rows.map {|row| { json: row } },
    }
    opts = {}
    unless dry_run?
      response = client.insert_all_table_data(project, dataset, table, body, opts)
    end
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404 # not found
      raise NotFoundError, "Table #{project}:#{dataset}.#{table} is not found"
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    Medjed::Bulk.logger.error {
      "insert_all_table_data(#{project}, #{dataset}, #{table}, #{opts}), response:#{response}"
    }
    raise Error, "failed to insert_all table_data #{project}:#{dataset}.#{table}, response:#{response}"
  end

  { responses: { insert_all_table_data: response } }
end

#insert_dataset(dataset: nil, reference: nil) ⇒ Object Also known as: create_dataset 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 137

def insert_dataset(dataset: nil, reference: nil)
  dataset ||= self.dataset
  begin
    logger.info { "#{head}Insert (create) dataset... #{project}:#{dataset}" }
    hint = {}
    if reference
      response = get_dataset(reference)
      hint = { access: response.access }
    end
    body = {
      dataset_reference: {
        project_id: project,
        dataset_id: dataset,
      },
    }.merge(hint)
    opts = {}
    logger.debug { "#{head}insert_dataset(#{project}, #{body}, #{opts})" }
    unless dry_run?
      response = client.insert_dataset(project, body, opts)
    end
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 409 && /Already Exists:/ =~ e.message
      # ignore 'Already Exists' error
      return {}
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    raise Error, "Failed to insert_dataset(#{project}, #{body}, #{opts}), response:#{response}"
  end

  { responses: { insert_dataset: response } }
end

#insert_select(query:, destination_table: nil, destination_dataset: nil, write_disposition: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 533

def insert_select(query:, destination_table: nil, destination_dataset: nil, write_disposition: nil)
  destination_table   ||= self.table
  destination_dataset ||= self.dataset
  write_disposition ||= 'WRITE_TRUNCATE'

  body  = {
    job_reference: {
      project_id: self.project,
      job_id: "job_#{SecureRandom.uuid}",
    },
    configuration: {
      query: {
        allow_large_results: true,
        flatten_results: false,
        write_disposition: write_disposition,
        query: query,
        destination_table: {
          project_id: self.project,
          dataset_id: destination_dataset,
          table_id: destination_table,
        },
      }
    }
  }
  opts = {}

  logger.info { "#{head}insert_job(#{project}, #{body}, #{opts})" }
  unless dry_run?
    response = client.insert_job(project, body, opts)
    get_response = wait_load('query', response)
  end

  {
    responses: {
      insert_job: response,
      last_get_job: get_response,
    }
  }
end

#insert_table(dataset: nil, table: nil, columns:) ⇒ Object Also known as: create_table 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 201

def insert_table(dataset: nil, table: nil, columns: )
  dataset ||= self.dataset
  table ||= self.table
  schema = Schema.new(columns)

  begin
    logger.info { "#{head}Insert (create) table... #{project}:#{dataset}.#{table}" }
    body = {
      table_reference: {
        table_id: table,
      },
      schema: {
        fields: schema,
      }
    }
    opts = {}
    logger.debug { "#{head}insert_table(#{project}, #{dataset}, #{body}, #{opts})" }
    unless dry_run?
      response = client.insert_table(project, dataset, body, opts)
    end
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 409 && /Already Exists:/ =~ e.message
      # ignore 'Already Exists' error
      return {}
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    raise Error, "Failed to insert_table(#{project}, #{dataset}, #{body}, #{opts}), response:#{response}"
  end

  { responses: { insert_table: response } }
end

#job_status_max_polling_time ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 75

def job_status_max_polling_time
  @job_status_max_polling_time ||= config[:job_status_polling_time] || 3600
end

#job_status_polling_interval ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 71

def job_status_polling_interval
  @job_status_polling_interval ||= config[:job_status_polling_interval] || 5
end

#list_table_data(dataset: nil, table: nil, max_results: 100) ⇒ Object

Example: {

columns:
  [
    {
      name: id,
      type: INTEGER
    },
    {
      name: type,
      type: STRING
    },
    {
      name: record.child1,
      type: STRING
    },
    {
      name: record.child2,
      type: STRING
    },
values:
  [
    [2,"two","child3","child4"],
    [1,"one","child1","child2"]
  ],
total_rows: 2

}

Returns:

  • Hash result of list table_data



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 385

def list_table_data(dataset: nil, table: nil, max_results: 100)
  dataset ||= self.dataset
  table ||= self.table

  begin
    logger.info  { "list_table_data(#{project}, #{dataset}, #{table}, max_results: #{max_results})" }
    response = client.list_table_data(project, dataset, table, max_results: max_results)
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404 # not found
      raise NotFoundError, "Table #{project}:#{dataset}.#{table} is not found"
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    logger.error  { "list_table_data(#{project}, #{dataset}, #{table}, max_results: #{max_results})" }
    raise Error, "Failed to list table_data #{project}:#{dataset}.#{table}, response:#{response}"
  end

  flattened_columns = Schema.new(existing_columns).flattened_columns.map do |name, column|
    {name: name}.merge!(column)
  end
  if rows = response.to_h[:rows]
    flattened_values = flatten_values(rows)
  end

  {
    total_rows: response.total_rows,
    columns: flattened_columns,
    values: flattened_values,
    responses: {
      list_table_data: response,
    }
  }
end

#list_tables(dataset: nil, max_results: 999999) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 259

def list_tables(dataset: nil, max_results: 999999)
  dataset ||= self.dataset

  tables = []
  begin
    logger.info { "List tables... #{project}:#{dataset}" }
    response = client.list_tables(project, dataset, max_results: max_results)
    while true
      _tables = (response.tables || []).map { |t| t.table_reference.table_id.to_s }
      tables.concat(_tables)
      if next_page_token = response.next_page_token
        response = client.list_tables(project, dataset, page_token: next_page_token, max_results: max_results)
      else
        break
      end
    end
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404 && /Not found:/ =~ e.message
      raise NotFoundError, "Dataset #{project}:#{dataset} is not found"
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    logger.error { "list_tables(#{project}, #{dataset}), response:#{response}" }
    raise Error, "failed to list tables #{project}:#{dataset}, response:#{response}"
  end

  { tables: tables }
end

#logger ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 15

def logger
  BigqueryMigration.logger
end

#migrate_table(table: nil, schema_file: nil, columns: nil, backup_dataset: nil, backup_table: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 662

def migrate_table(table: nil, schema_file: nil, columns: nil, backup_dataset: nil, backup_table: nil)
  table ||= self.table
  backup_dataset ||= self.dataset

  if schema_file.nil? and columns.nil?
    raise ArgumentError, '`schema_file` or `columns` is required'
  end
  if schema_file
    columns = HashUtil.deep_symbolize_keys(JSON.parse(File.read(schema_file)))
  end
  Schema.validate_columns!(columns)

  before_columns = existing_columns

  result = {}
  if before_columns.empty?
    result = create_table(table: table, columns: columns)
  else
    add_columns  = Schema.diff_columns(before_columns, columns)
    drop_columns = Schema.diff_columns(columns, before_columns)

    if !drop_columns.empty?
      drop_column(table: table, columns: columns,
                  backup_dataset: backup_dataset, backup_table: backup_table)
    elsif !add_columns.empty?
      add_column(table: table, columns: columns)
    end
  end

  after_columns = existing_columns

  if after_columns.empty? and !dry_run?
    raise Error, "after_columns is empty. " \
      "before_columns: #{before_columns}, after_columns: #{after_columns}, columns: #{columns}"
  end

  result.merge!( before_columns: before_columns, after_columns: after_columns )
end

#patch_table(dataset: nil, table: nil, columns: nil, add_columns: nil) ⇒ Object Also known as: add_column 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 437

def patch_table(dataset: nil, table: nil, columns: nil, add_columns: nil)
  dataset ||= self.dataset
  table ||= self.table
  
  if columns.nil? and add_columns.nil?
    raise ArgumentError, 'patch_table: `columns` or `add_columns` is required'
  end

  before_columns = existing_columns
  if columns # if already given
    schema = Schema.new(columns)
  else
    schema = Schema.new(add_columns)
    schema.reverse_merge!(before_columns)
  end
  schema.validate_permitted_operations!(before_columns)

  begin
    logger.info { "#{head}Patch table... #{project}:#{dataset}.#{table}" }
    fields = schema.map {|column| HashUtil.deep_symbolize_keys(column) }
    body = {
      schema: {
        fields: fields,
      }
    }
    opts = {}
    logger.debug { "#{head}patch_table(#{project}, #{dataset}, #{table}, #{body}, options: #{opts})" }
    unless dry_run?
      response = client.patch_table(project, dataset, table, body, options: opts)
    end
  rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
    if e.status_code == 404 # not found
      raise NotFoundError, "Table #{project}:#{dataset}.#{table} is not found"
    end

    response = {status_code: e.status_code, message: e.message, error_class: e.class}
    logger.error {
      "patch_table(#{project}, #{dataset}, #{table}, #{body}, options: #{opts}), response:#{response}"
    }
    raise Error, "Failed to patch table #{project}:#{dataset}.#{table}, response:#{response}"
  end

  after_columns = existing_columns

  {
    before_columns: before_columns,
    after_columns:  after_columns,
    responses: { patch_table: response },
  }
end

#project ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 59

def project
  @project ||= config[:project] || raise(ConfigError, '`project` is required.')
end

#purge_tables(dataset: nil, table_prefix:, suffix_format:, purge_before:, timezone: nil) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 288

def purge_tables(dataset: nil, table_prefix: , suffix_format: , purge_before: , timezone: nil)
  dataset ||= self.dataset
  timezone ||= Time.now.strftime('%z')

  before_tables = list_tables[:tables]

  purge_before_t = TimeWithZone.strptime_with_zone(purge_before, suffix_format, timezone)
  tables = before_tables.select do |tbl|
    suffix = tbl.gsub(table_prefix, '')
    begin
      suffix_t = TimeWithZone.strptime_with_zone(suffix, suffix_format, timezone)
    rescue
      next
    end
    # skip if different from the suffix_format
    next if suffix_t.strftime(suffix_format) != suffix
    suffix_t <= purge_before_t
  end

  tables.each do |_table|
    delete_table(table: _table)
    # If you make more than 100 requests per second, throttling might occur.
    # See https://cloud.google.com/bigquery/quota-policy#apirequests
    sleep 1
  end

  { delete_tables: tables }
end

#table ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 67

def table
  @table  ||= config[:table]   || raise(ConfigError, '`table` is required.')
end

#wait_load(kind, response) ⇒ Object 



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# File 'lib/bigquery_migration/bigquery_wrapper.rb', line 573

def wait_load(kind, response)
  started = Time.now

  wait_interval = self.job_status_polling_interval
  max_polling_time = self.job_status_max_polling_time
  _response = response

  while true
    job_id = _response.job_reference.job_id
    elapsed = Time.now - started
    status = _response.status.state
    if status == "DONE"
      logger.info {
        "#{kind} job completed... " \
        "job id:[#{job_id}] elapsed_time:#{elapsed.to_f}sec status:[#{status}]"
      }
      break
    elsif elapsed.to_i > max_polling_time
      message = "Checking #{kind} job status... " \
        "job id:[#{job_id}] elapsed_time:#{elapsed.to_f}sec status:[TIMEOUT]"
      logger.info { message }
      raise JobTimeoutError.new(message)
    else
      logger.info {
        "Checking #{kind} job status... " \
        "job id:[#{job_id}] elapsed_time:#{elapsed.to_f}sec status:[#{status}]"
      }
      sleep wait_interval
      _response = client.get_job(project, job_id)
    end
  end

  # cf. http://www.rubydoc.info/github/google/google-api-ruby-client/Google/Apis/BigqueryV2/JobStatus#errors-instance_method
  # `errors` returns Array<Google::Apis::BigqueryV2::ErrorProto> if any error exists.
  # Otherwise, this returns nil.
  if _errors = _response.status.errors
    raise Error, "Failed during waiting a job, get_job(#{project}, #{job_id}), errors:#{_errors.map(&:to_h)}"
  end

  _response
end