Class: StrokeDB::Transaction

Inherits:
Object
  • Object
show all
Defined in:
lib/strokedb/transaction.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Transaction

Returns a new instance of Transaction.



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# File 'lib/strokedb/transaction.rb', line 7

def initialize(options = {})
  @options = options.stringify_keys
  @uuid = Util.random_uuid
  storage.add_chained_storage!(store.storage)
end

Instance Attribute Details

#uuid ⇒ Object (readonly)

Returns the value of attribute uuid.



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# File 'lib/strokedb/transaction.rb', line 5

def uuid
  @uuid
end

Instance Method Details

#commit! ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 58

def commit!
  storage.sync_chained_storage!(store.storage)
  true
end

#execute ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/strokedb/transaction.rb', line 38

def execute
  raise ArgumentError, "no block provided" unless block_given?

  Thread.current[:strokedb_transactions] ||= []
  Thread.current[:strokedb_transactions].push self
  
  @timestamp = LTS.new(store.timestamp.counter,uuid)

  begin
    result = yield(self)
  rescue 
    throw $!
  ensure
    Thread.current[:strokedb_transactions].pop
  end
  
  
  result
end

#find(uuid, version = nil, opts = {}) ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 25

def find(uuid, version=nil, opts = {})
  storage.find(uuid,version,opts.merge(:store => self))
end

#head_version(uuid) ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 29

def head_version(uuid)
  storage.head_version(uuid,{ :store => self })
end

#inspect ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 21

def inspect
  "#<Transaction #{@uuid}>"
end

#rollback! ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 63

def rollback!
  @options['storage'] = setup_storage
  true
end

#save!(doc) ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 33

def save!(doc)
  @timestamp = @timestamp.next
  storage.save!(doc,@timestamp)
end

#storage ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 13

def storage
  @options['storage'] ||= setup_storage
end

#store ⇒ Object 



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# File 'lib/strokedb/transaction.rb', line 17

def store
  @options['store']
end