Class: Moneta::Adapters::Sequel::MySQL Private

Inherits:
Moneta::Adapters::Sequel show all
Defined in:
lib/moneta/adapters/sequel.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Attribute Summary

Attributes inherited from Moneta::Adapters::Sequel

#backend, #key_column, #value_column

Instance Method Summary collapse

Methods inherited from Moneta::Adapters::Sequel

#clear, #close, #create, #delete, #fetch_values, #initialize, #key?, #load, new, #slice, #values_at

Methods included from Defaults

#[], #[]=, #close, #create, #decrement, #features, #fetch, #fetch_values, included, #key?, #slice, #supports?, #update, #values_at

Methods included from OptionSupport

#expires, #prefix, #raw, #with

Constructor Details

This class inherits a constructor from Moneta::Adapters::Sequel

Instance Method Details

#each_key ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/moneta/adapters/sequel.rb', line 364

def each_key
  return super unless block_given? && @each_key_server && @table.respond_to?(:stream)
  # Order is not required when streaming
  @table.server(@each_key_server).select(key_column).paged_each do |row|
    yield row[key_column]
  end
  self
end

#increment(key, amount = 1, options = {}) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/moneta/adapters/sequel.rb', line 335

def increment(key, amount = 1, options = {})
  @backend.transaction do
    # this creates a row-level lock even if there is no existing row (a
    # "gap lock").
    if row = @load_for_update.call(key: key)
      # Integer() will raise an exception if the existing value cannot be parsed
      amount += Integer(row[value_column])
      @increment_update.call(key: key, value: amount)
    else
      @create.call(key: key, value: amount)
    end
    amount
  end
rescue ::Sequel::SerializationFailure # Thrown on deadlock
  tries ||= 0
  (tries += 1) <= 3 ? retry : raise
end

#merge!(pairs, options = {}, &block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/moneta/adapters/sequel.rb', line 353

def merge!(pairs, options = {}, &block)
  @backend.transaction do
    pairs = yield_merge_pairs(pairs, &block) if block_given?
    @table
      .on_duplicate_key_update
      .import([key_column, value_column], blob_pairs(pairs).to_a)
  end

  self
end

#store(key, value, options = {}) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/moneta/adapters/sequel.rb', line 330

def store(key, value, options = {})
  @store.call(key: key, value: blob(value))
  value
end