Class: Lore::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/lore/connection.rb

Overview

:nodoc

Constant Summary collapse

@@logger =

include Singleton

Lore.logger
@@query_count = 
0
@@result_row_count = 
0

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/lore/connection.rb', line 91

def initialize
end

Class Method Details

.perform(query) ⇒ Object 



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# File 'lib/lore/connection.rb', line 118

def self.perform(query)
  
  begin
    
    connection = Context.get_connection
    
    @@query_count += 1
    result = connection.exec(query)
    @@result_row_count += result.num_tuples
    
    # Log database query on low level: 
    
    if Lore.log_queries? then
      query.split("\n").each { |line|
        @@logger.debug { line }
      }
    end
    
  rescue ::Exception => pge
    
    pge.message << "\n" << query
    @@logger.error { pge.message }
    @@logger.error { 'Context: ' << Context.inspect }
    @@logger.error { 'Query: ' << "\n" << query }
    raise pge
    
  end
  
  return Result.new(query, result)
  
end

.perform_cacheable(query) ⇒ Object 



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# File 'lib/lore/connection.rb', line 107

def self.perform_cacheable(query)
  
  if Lore::Cache::Cached_Entities.include?(query) then
      result = Lore::Cache::Cached_Entities[query]
  else
    result = perform(query)
    Lore::Cache::Cached_Entities[query] = result
  end
  return result
end

.query_count ⇒ Object 



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# File 'lib/lore/connection.rb', line 100

def self.query_count
  @@query_count
end

.reset_query_count ⇒ Object 



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# File 'lib/lore/connection.rb', line 94

def self.reset_query_count
  @@query_count = 0
end

.reset_result_row_count ⇒ Object 



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# File 'lib/lore/connection.rb', line 97

def self.reset_result_row_count
  @@result_row_count = 0
end

.result_row_count ⇒ Object 



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# File 'lib/lore/connection.rb', line 103

def self.result_row_count
  @@result_row_count
end