Class: SdbDal::MemoryRepository

Inherits:
Object
  • Object
show all
Defined in:
lib/sdb_dal/memory_repository.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(sdb_domain = nil, clob_bucket = nil, aws_key_id = nil, aws_secret_key = nil, memcache_servers = nil, dummy = nil, append_table_to_domain = nil, options = {}) ⇒ MemoryRepository

Returns a new instance of MemoryRepository.



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# File 'lib/sdb_dal/memory_repository.rb', line 9

def initialize(
    sdb_domain= nil,
    clob_bucket= nil,
    aws_key_id= nil,
    aws_secret_key= nil,
    memcache_servers = nil ,
    dummy=nil,
    append_table_to_domain=nil,
    options={}
  )
  clear
end

Instance Attribute Details

#storage ⇒ Object

Returns the value of attribute storage.



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# File 'lib/sdb_dal/memory_repository.rb', line 7

def storage
  @storage
end

#use_cache ⇒ Object

this here just so interface matches sdb repo



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# File 'lib/sdb_dal/memory_repository.rb', line 6

def use_cache
  @use_cache
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 28

def clear
  @records={}
  @indexes={}
  @reverse_indexes={}
  @storage=MemoryStorage.new
end

#clear_session_cache ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 24

def clear_session_cache

end

#destroy(table_name, primary_key) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 208

def destroy(table_name, primary_key)
  key=make_cache_key(table_name,primary_key);

  if @records.has_key?(key)
    @records.delete(key)
  end
  remove_from_indices(table_name,primary_key)
end

#find_one(table_name, primary_key, attribute_descriptions) ⇒ Object

, non_clob_attribute_names, clob_attribute_names)



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# File 'lib/sdb_dal/memory_repository.rb', line 201

def find_one(table_name, primary_key,attribute_descriptions)#, non_clob_attribute_names, clob_attribute_names)
  return @records[make_cache_key(table_name,primary_key)]
end

#get_clob(table_name, primary_key, clob_name) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 204

def get_clob(table_name,primary_key,clob_name)
  return @storage.get("",make_clob_key(table_name,primary_key,clob_name))
    
end

#pause ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 21

def pause
end

#query(table_name, attribute_descriptions, options) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 100

def query(table_name,attribute_descriptions,options)
  
  if options[:query]
    raise 'query not supported yet'
  end
  result=[]
  params=nil
  params=options[:params] if options.has_key?(:params)

  if options.has_key?(:map)
    params||={}
    keys=options[:map][:keys]
    values=options[:map][:values]
    (0..keys.length-1).each do |i|
      key=keys[i]
      value=values[i]
      params[key]=value
    end

  end
  if options.has_key?(:index)
    result= retrieve_from_index(table_name,options[:index],options[:index_value])
  else
    @records.each do |record_key,record|
      ok=true
      if record["metadata%table_name"]!=table_name
        ok=false
      else
        if params
         
          params.each do |param_key,param_value|

            if param_value==:NOT_NULL
              if record[param_key]==nil
                ok=false
                break
              end
            elsif param_value==:NULL
              if record[param_key]!=nil
                ok=false
                break
              end
            elsif param_value.respond_to?(:matches?)

              if !param_value.matches?(record[param_key])
                ok=false
                break
              end
            elsif !record[param_key] && !param_value
              # #ok
              break
            elsif record[param_key]!=param_value
              ok=false
              break
            end
          end
        end
        if options.has_key?(:conditions)
         
          options[:conditions].each do |condition|

            if !condition.matches?(record)
              ok=false
              break
            end
          end
        end
      end
      if ok
        result << record
      end
      
    end
  end
  if options and options[:order_by]
    result.sort! do |a,b|
      
        a_value=a[options[:order_by]]
        b_value=b[options[:order_by]]
            x=0
            if b_value && a_value
              x=b_value <=> a_value
            elsif a_value
              x=-1
            elsif b_value
              x=1
            else
              x=0
            end
        if options[:order] && options[:order]!=:ascending
          x
        else
          -x
        end
    end
  end
  if options[:limit] and result.length>options[:limit]
    result=result[0..options[:limit]-1]
  end
  return result
end

#query_ids(table_name, attribute_descriptions, options) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 83

def query_ids(table_name,attribute_descriptions,options)
  primary_key=nil
  attribute_descriptions.each do |name,desc|
    if desc.is_primary_key
      primary_key= name.to_sym
      break
    end
  
  end
  objects=query(table_name,attribute_descriptions,options)
  result=[]
  objects.each do | o|
    result << o[primary_key]
  end
  result
end

#remove_from_indices(table_name, primary_key) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 216

def remove_from_indices(table_name,primary_key)
  key=make_cache_key(table_name,primary_key);
  if @reverse_indexes[table_name]
    indicies=@reverse_indexes[table_name][key]
    if indicies
      indicies.each do |index|
        index.each do |record|
          if record["metadata%primary_key"]==key
            index.delete(record)
            break
          end
        end
      end
      @reverse_indexes[table_name].delete(key)
    end
  end

end

#retrieve_from_index(table_name, index_name, index_value) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 78

def retrieve_from_index(table_name,index_name,index_value)
  return [] unless @indexes[table_name]
  return [] unless @indexes[table_name][index_name]
  return @indexes[table_name][index_name][index_value] ||[]
end

#save(table_name, primary_key, attributes, index_descriptions) ⇒ Object 



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# File 'lib/sdb_dal/memory_repository.rb', line 35

def save(table_name, primary_key, attributes,index_descriptions)
  key=make_cache_key(table_name,primary_key);
  record=@records[key]
  if !record
    record={}
    @records[key]=record
    
  end

  attributes.each do |description,value|
    if description.is_clob
      @storage.put("",make_clob_key(table_name,primary_key,description.name),value)
    else
      record[description.name]=value
    end
  end
   record["metadata%table_name"]=table_name
  record["metadata%primary_key"]=key
  if index_descriptions
    remove_from_indices(table_name,primary_key)
    index_descriptions.each do |index_name,index|
      index_value=record[index_name.to_sym]
      save_into_index(table_name, record, index.name, index_value)
    end

  end
#      puts record.to_yaml
end

#save_into_index(table_name, record, index_name, index_value) ⇒ Object

puts record.to_yaml



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# File 'lib/sdb_dal/memory_repository.rb', line 63

def save_into_index(table_name,record,index_name,index_value)
  @indexes[table_name]||={}
  @indexes[table_name][index_name]||={}
  index=(@indexes[table_name][index_name][index_value]||=[])
  index.each_index do |i|
    if index[i]["metadata%primary_key"]==record["metadata%primary_key"]
      index[i]=record
      return
    end
  end
  index << record
  @reverse_indexes[table_name]||={}
  @reverse_indexes[table_name][record["metadata%primary_key"]]||=[]
  @reverse_indexes[table_name][record["metadata%primary_key"]] << index
end