Class: SimplerDB::DB

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/simplerdb/db.rb

Overview

The main SimplerDB class, containing methods that correspond to the AWS API.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DB

Returns a new instance of DB.



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# File 'lib/simplerdb/db.rb', line 84

def initialize
  reset
end

Instance Method Details

#create_domain(name) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 94

def create_domain(name)
  @domains[name] ||= Domain.new(name)  
end

#delete_attributes(domain_name, item_name, attributes) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 131

def delete_attributes(domain_name, item_name, attributes)
  domain = @domains[domain_name]
  item = domain.items[item_name]
  attributes.each { |attr| item.delete_attribute(attr) } 
end

#delete_domain(name) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 98

def delete_domain(name)
  @domains.delete(name)
end

#get_attributes(domain_name, item_name, attribute_name = nil) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 119

def get_attributes(domain_name, item_name, attribute_name = nil)
  domain = @domains[domain_name]
  item = domain.items[item_name]
  return item.get_attributes(attribute_name)
end

#list_domains(max = 100, token = 0) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 102

def list_domains(max = 100, token = 0)
  doms = []
  count = 0
  token = 0 unless token
  @domains.keys.each do |domain|
    break if doms.size == max
    doms << domain if count >= token.to_i
    count += 1
  end
  
  if (count >= @domains.size)
    return doms,nil
  else
    return doms,count
  end
end

#put_attributes(domain_name, item_name, attribute_params) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 125

def put_attributes(domain_name, item_name, attribute_params)
  domain = @domains[domain_name]
  item = domain.items[item_name]
  attribute_params.each { |attr| item.put_attribute(attr.to_attr, attr.replace) } 
end

#query(domain, query, max = 100, token = 0) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 137

def query(domain, query, max = 100, token = 0)
  @query_executor.do_query(query, @domains[domain], max, token)
end

#reset ⇒ Object

For testing



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# File 'lib/simplerdb/db.rb', line 89

def reset
  @domains = {}
  @query_executor = QueryExecutor.new
end