Class: PgLogicalReplicator::SchemaTransfer

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_logical_replicator/schema_transfer.rb

Instance Method Summary collapse

Constructor Details

#initialize(source_host:, source_port:, source_database:, target_host:, target_port:, target_database:, source_username:, source_password:, target_username:, target_password:) ⇒ SchemaTransfer 



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# File 'lib/pg_logical_replicator/schema_transfer.rb', line 8

def initialize(source_host:, source_port:, source_database:, target_host:, target_port:, target_database:, source_username:, source_password:, target_username:, target_password:)
  @source_host     = source_host
  @source_port     = source_port
  @source_database = source_database
  @source_username = source_username
  @source_password = source_password
  @target_host     = target_host
  @target_port     = target_port
  @target_database = target_database
  @target_username = target_username
  @target_password = target_password
end

Instance Method Details

#transfer ⇒ Object 



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# File 'lib/pg_logical_replicator/schema_transfer.rb', line 21

def transfer
  puts 'Starting schema transfer...'

  ENV['PGPASSWORD_SOURCE'] = @source_password
  ENV['PGPASSWORD_TARGET'] = @target_password

  Tempfile.create('db_dump') do |tempfile|
    pg_dump_command = [
      "pg_dump",
      "-s", "--no-owner", "--no-acl", "--no-privileges",
      "-h", @source_host,
      "-p", @source_port,
      "-d", @source_database,
      "-U", @source_username,
      "> #{tempfile.path}"
    ].join(' ')

    psql_command = [
      "psql",
      "-h", @target_host,
      "-p", @target_port,
      "-d", @target_database,
      "-U", @target_username,
      "< #{tempfile.path}"
    ].join(' ')

    system({ "PGPASSWORD" => ENV['PGPASSWORD_SOURCE'] }, pg_dump_command)
    system({ "PGPASSWORD" => ENV['PGPASSWORD_TARGET'] }, psql_command)
  end

  ENV.delete('PGPASSWORD_SOURCE')
  ENV.delete('PGPASSWORD_TARGET')

  puts 'Schema transfer completed successfully.'
end