Class: RedshiftConnector::S3DataFileBundle

Inherits:
Object
  • Object
show all
Defined in:
lib/redshift_connector/s3_data_file_bundle.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bucket, prefix, format: :csv, logger: RedshiftConnector.logger) ⇒ S3DataFileBundle

Returns a new instance of S3DataFileBundle.



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 33

def initialize(bucket, prefix, format: :csv, logger: RedshiftConnector.logger)
  @bucket = bucket
  @prefix = prefix
  @format = format
  @logger = logger
  @reader_class = Reader.get(format)
  logger.info "reader: #{@reader_class}"
end

Instance Attribute Details

#bucket ⇒ Object (readonly)

Returns the value of attribute bucket.



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 42

def bucket
  @bucket
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 44

def logger
  @logger
end

#prefix ⇒ Object (readonly)

Returns the value of attribute prefix.



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 43

def prefix
  @prefix
end

Class Method Details

.for_params(params) ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 9

def self.for_params(params)
  unless params.txn_id
    raise ArgumentError, "cannot create bundle: missing txn_id"
  end
  s3bucket = params.bucket ? S3Bucket.get(params.bucket) : S3Bucket.default
  for_table(
    bucket: s3bucket,
    schema: params.schema,
    table: params.table,
    txn_id: params.txn_id,
    logger: params.logger
  )
end

.for_prefix(bucket: S3Bucket.default, prefix:, format:, logger: RedshiftConnector.logger) ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 23

def self.for_prefix(bucket: S3Bucket.default, prefix:, format:, logger: RedshiftConnector.logger)
  real_prefix = "#{bucket.prefix}/#{prefix}"
  new(bucket, real_prefix, format: format, logger: logger)
end

.for_table(bucket: S3Bucket.default, schema:, table:, txn_id:, logger: RedshiftConnector.logger) ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 28

def self.for_table(bucket: S3Bucket.default, schema:, table:, txn_id:, logger: RedshiftConnector.logger)
  prefix = "#{bucket.prefix}/#{schema}_export/#{table}/#{txn_id}/#{table}.csv."
  new(bucket, prefix, format: :redshift_csv, logger: logger)
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 59

def clear
  pref = File.dirname(@prefix) + '/'
  keys = @bucket.objects(prefix: pref).map(&:key)
  unless keys.empty?
    logger.info "DELETE #{pref}*"
    @bucket.delete_objects(keys)
  end
end

#credential_string ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 50

def credential_string
  @bucket.credential_string
end

#data_files ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 54

def data_files
  @bucket.objects(prefix: @prefix)
    .map {|obj| S3DataFile.new(obj, reader_class: @reader_class) }
end

#url ⇒ Object 



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# File 'lib/redshift_connector/s3_data_file_bundle.rb', line 46

def url
  "s3://#{@bucket.name}/#{@prefix}"
end