Module: Rufus::Tokyo::Transactions

Included in:
Edo::CabinetCore, Edo::TableCore, Cabinet, Table
Defined in:
lib/rufus/tokyo/transactions.rb

Overview

A mixin for structures to respond to tranbegin, trancommit and tranabort

Defined Under Namespace

Classes: Abort

Instance Method Summary collapse

Instance Method Details

#abort ⇒ Object

Aborts the enclosing transaction

See #transaction

Raises:



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# File 'lib/rufus/tokyo/transactions.rb', line 70

def abort
  raise Abort, "abort transaction !"
end

#transaction ⇒ Object

Transaction in a block.

table.transaction do
  table['pk0'] => { 'name' => 'Fred', 'age' => '40' }
  table['pk1'] => { 'name' => 'Brooke', 'age' => '76' }
  table.abort if weather.bad?
end

(This is a table example, a classical cabinet won’t accept a hash as a value for its entries).

If an error or an abort is trigger withing the transaction, it’s rolled back. If the block executes successfully, it gets commited.



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# File 'lib/rufus/tokyo/transactions.rb', line 49

def transaction

  return unless block_given?

  begin
    tranbegin
    yield
    trancommit
  rescue Rufus::Tokyo::Transactions::Abort
    tranabort
  rescue Exception => e
    tranabort
    raise e
  end
end