Class: ActiveSupport::FileUpdateChecker

### Home Classes Methods

### In Files

- lib/active_support/file_update_checker.rb

### Parent

Object

### Methods

- ::new
- #execute_if_updated
- #updated_at

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No matching classes.

# ActiveSupport::FileUpdateChecker

This class is responsible to track files and invoke the given block whenever one of these files are changed. For example, this class is used by Rails to reload the I18n framework whenever they are changed upon a new request.

    i18n_reloader = ActiveSupport::FileUpdateChecker.new(paths) do
      I18n.reload!
    end

    ActionDispatch::Callbacks.to_prepare do
      i18n_reloader.execute_if_updated
    end

### Attributes

last_update_at[R]
paths[R]

### Public Class Methods

new(paths, calculate=false, &block) click to toggle source

    # File lib/active_support/file_update_checker.rb, line 18
    def initialize(paths, calculate=false, &block)
      @paths = paths
      @block = block
      @last_update_at = calculate ? updated_at : nil
    end

### Public Instance Methods

execute_if_updated() click to toggle source

    # File lib/active_support/file_update_checker.rb, line 28
    def execute_if_updated
      current_update_at = self.updated_at
      if @last_update_at != current_update_at
        @last_update_at = current_update_at
        @block.call
      end
    end

updated_at() click to toggle source

    # File lib/active_support/file_update_checker.rb, line 24
    def updated_at
      paths.map { |path| File.stat(path).mtime }.max
    end

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