Class: Chef::ChefFS::FileSystem::RestListEntry

Inherits:
BaseFSObject show all
Defined in:
lib/chef/chef_fs/file_system/rest_list_entry.rb

Instance Attribute Summary

Attributes inherited from BaseFSObject

#name, #parent, #path

Instance Method Summary collapse

Methods inherited from BaseFSObject

#can_have_child?, #child, #children, #create_child, #dir?, #path_for_printing, #root

Constructor Details

#initialize(name, parent, exists = nil) ⇒ RestListEntry

Returns a new instance of RestListEntry.



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 30

def initialize(name, parent, exists = nil)
  super(name, parent)
  @exists = exists
end

Instance Method Details

#_read_json ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 87

def _read_json
  begin
    # Minimize the value (get rid of defaults) so the results don't look terrible
    root.get_json(api_path)
  rescue Timeout::Error => e
    raise Chef::ChefFS::FileSystem::OperationFailedError.new(:read, self, e), "Timeout reading: #{e}"
  rescue Net::HTTPServerException => e
    if $!.response.code == "404"
      raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
    else
      raise Chef::ChefFS::FileSystem::OperationFailedError.new(:read, self, e), "HTTP error reading: #{e}"
    end
  end
end

#api_child_name ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 39

def api_child_name
  if name.length < 5 || name[-5,5] != ".json"
    raise "Invalid name #{path}: must end in .json"
  end
  name[0,name.length-5]
end

#api_error_text(response) ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 174

def api_error_text(response)
  begin
    Chef::JSONCompat.parse(response.body)['error'].join("\n")
  rescue
    response.body
  end
end

#api_path ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 46

def api_path
  "#{parent.api_path}/#{api_child_name}"
end

#chef_object ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 102

def chef_object
  # REST will inflate the Chef object using json_class
  data_handler.json_class.json_create(read)
end

#compare_to(other) ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 111

def compare_to(other)
  # TODO this pair of reads can be parallelized

  # Grab the other value
  begin
    other_value_json = other.read
  rescue Chef::ChefFS::FileSystem::NotFoundError
    return [ nil, nil, :none ]
  end

  # Grab this value
  begin
    value = _read_json
  rescue Chef::ChefFS::FileSystem::NotFoundError
    return [ false, :none, other_value_json ]
  end

  # Minimize (and normalize) both values for easy and beautiful diffs
  value = minimize_value(value)
  value_json = Chef::JSONCompat.to_json_pretty(value)
  begin
    other_value = Chef::JSONCompat.parse(other_value_json)
  rescue Chef::Exceptions::JSON::ParseError => e
    Chef::Log.warn("Parse error reading #{other.path_for_printing} as JSON: #{e}")
    return [ nil, value_json, other_value_json ]
  end
  other_value = minimize_value(other_value)
  other_value_json = Chef::JSONCompat.to_json_pretty(other_value)

  [ value == other_value, value_json, other_value_json ]
end

#data_handler ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 35

def data_handler
  parent.data_handler
end

#delete(recurse) ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 69

def delete(recurse)
  begin
    rest.delete(api_path)
  rescue Timeout::Error => e
    raise Chef::ChefFS::FileSystem::OperationFailedError.new(:delete, self, e), "Timeout deleting: #{e}"
  rescue Net::HTTPServerException => e
    if e.response.code == "404"
      raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
    else
      raise Chef::ChefFS::FileSystem::OperationFailedError.new(:delete, self, e), "Timeout deleting: #{e}"
    end
  end
end

#environment ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 54

def environment
  parent.environment
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 58

def exists?
  if @exists.nil?
    begin
      @exists = parent.children.any? { |child| child.name == name }
    rescue Chef::ChefFS::FileSystem::NotFoundError
      @exists = false
    end
  end
  @exists
end

#minimize_value(value) ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 107

def minimize_value(value)
  data_handler.minimize(data_handler.normalize(value, self), self)
end

#org ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 50

def org
  parent.org
end

#read ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 83

def read
  Chef::JSONCompat.to_json_pretty(minimize_value(_read_json))
end

#rest ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 143

def rest
  parent.rest
end

#write(file_contents) ⇒ Object 



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# File 'lib/chef/chef_fs/file_system/rest_list_entry.rb', line 147

def write(file_contents)
  begin
    object = Chef::JSONCompat.parse(file_contents)
  rescue Chef::Exceptions::JSON::ParseError => e
    raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self, e), "Parse error reading JSON: #{e}"
  end

  if data_handler
    object = data_handler.normalize_for_put(object, self)
    data_handler.verify_integrity(object, self) do |error|
      raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self), "#{error}"
    end
  end

  begin
    rest.put(api_path, object)
  rescue Timeout::Error => e
    raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self, e), "Timeout writing: #{e}"
  rescue Net::HTTPServerException => e
    if e.response.code == "404"
      raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
    else
      raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self, e), "HTTP error writing: #{e}"
    end
  end
end