Class: MockRedis::TransactionWrapper

Inherits:
Object
  • Object
show all
Includes:
UndefRedisMethods
Defined in:
lib/mock_redis/transaction_wrapper.rb

Instance Method Summary collapse

Methods included from UndefRedisMethods

included

Constructor Details

#initialize(db) ⇒ TransactionWrapper

Returns a new instance of TransactionWrapper.


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# File 'lib/mock_redis/transaction_wrapper.rb', line 11

def initialize(db)
  @db = db
  @transaction_futures = []
  @multi_stack = []
  @multi_block_given = false
end

Instance Method Details

#discardObject


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# File 'lib/mock_redis/transaction_wrapper.rb', line 41

def discard
  unless in_multi?
    raise Redis::CommandError, 'ERR DISCARD without MULTI'
  end
  pop_multi

  @transaction_futures = []
  'OK'
end

#execObject


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# File 'lib/mock_redis/transaction_wrapper.rb', line 51

def exec
  unless in_multi?
    raise Redis::CommandError, 'ERR EXEC without MULTI'
  end
  pop_multi
  return if in_multi?
  @multi_block_given = false

  responses = @transaction_futures.map do |future|
    begin
      result = send(*future.command)
      future.store_result(result)
      future.value
    rescue StandardError => e
      e
    end
  end

  @transaction_futures = []
  responses
end

#in_multi?Boolean

Returns:

  • (Boolean)

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# File 'lib/mock_redis/transaction_wrapper.rb', line 73

def in_multi?
  @multi_stack.any?
end

#initialize_copy(source) ⇒ Object


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# File 'lib/mock_redis/transaction_wrapper.rb', line 34

def initialize_copy(source)
  super
  @db = @db.clone
  @transaction_futures = @transaction_futures.clone
  @multi_stack = @multi_stack.clone
end

#multiObject


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# File 'lib/mock_redis/transaction_wrapper.rb', line 85

def multi
  if block_given?
    push_multi
    @multi_block_given = true
    begin
      yield(self)
      exec
    rescue StandardError => e
      discard
      raise e
    end
  else
    raise Redis::CommandError, 'ERR MULTI calls can not be nested' if in_multi?
    push_multi
    'OK'
  end
end

#pipelined {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:


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# File 'lib/mock_redis/transaction_wrapper.rb', line 103

def pipelined
  yield(self) if block_given?
end

#pop_multiObject


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# File 'lib/mock_redis/transaction_wrapper.rb', line 81

def pop_multi
  @multi_stack.pop
end

#push_multiObject


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# File 'lib/mock_redis/transaction_wrapper.rb', line 77

def push_multi
  @multi_stack.push(@multi_stack.size + 1)
end

#respond_to?(method, include_private = false) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/mock_redis/transaction_wrapper.rb', line 7

def respond_to?(method, include_private = false)
  super || @db.respond_to?(method)
end

#unwatchObject


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# File 'lib/mock_redis/transaction_wrapper.rb', line 107

def unwatch
  'OK'
end

#watch(*_) ⇒ Object


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# File 'lib/mock_redis/transaction_wrapper.rb', line 111

def watch(*_)
  if block_given?
    yield self
  else
    'OK'
  end
end