Class: CassandraObject::Adapters::AbstractAdapter

Inherits:
Object
  • Object
show all
Defined in:
lib/cassandra_object/adapters/abstract_adapter.rb

Direct Known Subclasses

CassandraAdapter, CassandraSchemalessAdapter

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ AbstractAdapter

Returns a new instance of AbstractAdapter.



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 5

def initialize(config)
  @config = config
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 4

def config
  @config
end

Instance Method Details

#batch ⇒ Object 



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 32

def batch
  @batch_statements = []
  yield
  execute_batch(@batch_statements) if !@batch_statements.nil? && @batch_statements.any?
ensure
  @batch_statements = nil
end

#batching? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 28

def batching?
  !@batch_statements.nil?
end

#delete(table, ids) ⇒ Object

Delete rows by an array of ids



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 22

def delete(table, ids) # abstract
end

#execute_batch(statements) ⇒ Object

abstract



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 25

def execute_batch(statements) # abstract
end

#execute_batchable(statements) ⇒ Object 



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 51

def execute_batchable(statements)
  if defined?(@batch_statements) && @batch_statements
    @batch_statements += statements
  else
    execute_batch(statements)
  end
end

#insert(table, id, attributes) ⇒ Object

Insert a new row



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 14

def insert(table, id, attributes) # abstract
end

#select(scope) ⇒ Object

Read records from a instance of CassandraObject::Scope



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 10

def select(scope) # abstract
end

#statement_with_options(stmt, options) ⇒ Object 



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 40

def statement_with_options(stmt, options)
  if options.present?
    with_stmt = options.split(',').map do |o|
      "#{o}"
    end.join(' AND ')

    stmt = "#{stmt} WITH #{with_stmt}"
  end
  stmt
end

#update(table, id, attributes) ⇒ Object

Update an existing row



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# File 'lib/cassandra_object/adapters/abstract_adapter.rb', line 18

def update(table, id, attributes) # abstract
end