Class: ViewCategoriesAction

Inherits:
WebAction show all
Includes:
Assert
Defined in:
lib/ribit/action.rb

Direct Known Subclasses

CancelCategoryAction

Constant Summary collapse

ID = 
'categories'
PAGE_CACHE_ID = 
'categories'

Instance Attribute Summary

Attributes inherited from WebAction

#id

Instance Method Summary collapse

Methods included from Assert

assert, #assert, assert_nil, #assert_nil, #assert_not_nil, assert_not_nil, raise_exception

Methods inherited from WebAction

#add_headers

Constructor Details

#initialize(ribitData, ribitConfig, pageCache) ⇒ ViewCategoriesAction

Returns a new instance of ViewCategoriesAction.



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# File 'lib/ribit/action.rb', line 761

def initialize( ribitData, ribitConfig, pageCache )
  assert_not_nil( ribitData, 'RibitData is nil' )
  assert_not_nil( ribitConfig )
  
  @id = ID
  @ribitData = ribitData
  @ribitConfig = ribitConfig
  @pageCache = pageCache
  @logger = RibitLogger.new( ViewCategoriesAction )
end

Instance Method Details

#decorate_page(page) ⇒ Object 



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# File 'lib/ribit/action.rb', line 773

def decorate_page( page )
  # set baseUrl etc.
  add_headers( page )
  return false
end

#get_cached_page ⇒ Object 



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# File 'lib/ribit/action.rb', line 828

def get_cached_page
  if ( @pageCache == nil )
    return nil
  end
  
  return @pageCache.get( PAGE_CACHE_ID )
end

#run(pageRequest, pageResponse) ⇒ Object 



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# File 'lib/ribit/action.rb', line 780

def run( pageRequest, pageResponse )
  super( pageRequest, pageResponse )
  
  cachedPage = get_cached_page
  if ( cachedPage != nil )
    @logger.debug( 'Found categories page from cache' )
    
    lastModified = pageRequest.get_header_field( 'If-Modified-Since' )
    if ( lastModified != nil )
      @logger.debug( "Found If-Modified-Since field from HTTP headers" )
      time = Time.httpdate( lastModified )
      
      # NOTE: MODIFIED time contains also fraction of seconds but httpdate
      #       doesn't have them => we have to compare full seconds
      if ( cachedPage.is_time_same_or_after( lastModified ) )
        @logger.debug( "Cached page is up to date" )
        pageResponse.status = 304
        return
      end
    end
    
    pageResponse.set_body( cachedPage.data )
    pageResponse.set_content_type( cachedPage.contentType )
    
    pageResponse.set_header_field( 'Cache-Control', 'public, must-revalidate, proxy-revalidate' )
    pageResponse.set_header_field( 'Last-Modified', cachedPage.lastModfiedHttpdate )
  
  else
    page = CategoriesPage.new( @ribitData, @ribitConfig )
    decorate_page( page )
      
    page.output_page( pageResponse )
    
    if ( @pageCache != nil  )
      # we can safely insert data to cache
      @logger.debug( "Inserting categories page data to cache" )
      
      cachedPage = CachedPage.new( pageResponse.get_body, pageResponse.get_content_type )       
      @pageCache.add( PAGE_CACHE_ID, cachedPage )
      
      pageResponse.set_header_field( 'Cache-Control', 'public, must-revalidate, proxy-revalidate' )
      pageResponse.set_header_field( 'Last-Modified', cachedPage.lastModfiedHttpdate )
    end
  end
  
end