Class: FDB::Database

Inherits:
FormerFuture show all
Defined in:
lib/fdbimpl.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from FormerFuture

#block_until_ready, #on_ready, #ready?

Constructor Details

#initialize(dpointer) ⇒ Database

Returns a new instance of Database.



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# File 'lib/fdbimpl.rb', line 514

def initialize(dpointer)
  @dpointer = dpointer
  @options = DatabaseOptions.new lambda { |code, param|
    FDBC.check_error FDBC.fdb_database_set_option(dpointer, code, param, param.nil? ? 0 : param.bytesize)
  }
  ObjectSpace.define_finalizer(self, self.class.finalize(@dpointer))
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/fdbimpl.rb', line 505

def options
  @options
end

Class Method Details

.finalize(ptr) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 507

def self.finalize(ptr)
  proc do
    # puts "Destroying database #{ptr}"
    FDBC.fdb_database_destroy(ptr)
  end
end

Instance Method Details

#clear(key) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 568

def clear(key)
  transact do |tr|
    tr.clear(key)
  end
end

#clear_and_watch(key) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 618

def clear_and_watch(key)
  transact do |tr|
    tr.clear(key)
    tr.watch(key)
  end
end

#clear_range(bkey, ekey) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 574

def clear_range(bkey, ekey)
  transact do |tr|
    tr.clear_range(bkey, ekey)
  end
end

#clear_range_start_with(prefix) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 597

def clear_range_start_with(prefix)
  transact do |tr|
    tr.clear_range_start_with(prefix)
  end
end

#create_transaction ⇒ Object 



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# File 'lib/fdbimpl.rb', line 522

def create_transaction
  tr = FFI::MemoryPointer.new :pointer
  FDBC.check_error FDBC.fdb_database_create_transaction(@dpointer, tr)
  Transaction.new(tr.read_pointer, self)
end

#get(key) ⇒ Object Also known as: [] 



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# File 'lib/fdbimpl.rb', line 550

def get(key)
  transact do |tr|
    tr[key].value
  end
end

#get_and_watch(key) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 603

def get_and_watch(key)
  transact do |tr|
    value = tr.get(key)
    watch = tr.watch(key)
    [value.value, watch]
  end
end

#get_key(keysel) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 580

def get_key(keysel)
  transact do |tr|
    tr.get_key(keysel).value
  end
end

#get_range(bkeysel, ekeysel, options = {}, &block) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 557

def get_range(bkeysel, ekeysel, options={}, &block)
  transact do |tr|
    a = tr.get_range(bkeysel, ekeysel, options).to_a
    if block_given?
      a.each &block
    else
      a
    end
  end
end

#get_range_start_with(prefix, options = {}, &block) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 586

def get_range_start_with(prefix, options={}, &block)
  transact do |tr|
    a = tr.get_range_start_with(prefix, options).to_a
    if block_given?
      a.each &block
    else
      a
    end
  end
end

#set(key, value) ⇒ Object Also known as: []= 



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# File 'lib/fdbimpl.rb', line 543

def set(key, value)
  transact do |tr|
    tr[key] = value
  end
end

#set_and_watch(key, value) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 611

def set_and_watch(key, value)
  transact do |tr|
    tr.set(key, value)
    tr.watch(key)
  end
end

#transact ⇒ Object 



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# File 'lib/fdbimpl.rb', line 528

def transact
  tr = create_transaction
  committed = false
  begin
    ret = yield tr
    # puts ret
    tr.commit.wait
    committed = true
  rescue Error => e
    # puts "Rescued #{e}"
    tr.on_error(e).wait
  end until committed
  ret
end

#watch(key) ⇒ Object 



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# File 'lib/fdbimpl.rb', line 625

def watch(key)
  transact do |tr|
    tr.watch(key)
  end
end