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Class: Mongo::Server::ConnectionCommon

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
Connection, ConnectionBase, Mongo::Server::PendingConnection, Mongo::Server::Monitor::Connection, Mongo::Server::PushMonitor::Connection
Inherits: Object
Defined in: lib/mongo/server/connection_common.rb

Overview

Note:

Although methods of this module are part of the public API, the fact that these methods are defined on this module and not on the classes which include this module is not part of the public API.

Common methods used by both monitoring and non-monitoring connections.

Since:

  • 2.0.0

Constant Summary

Instance Attribute Summary

Instance Method Summary

Instance Attribute Details

#compressor ⇒ String | nil (readonly)

The compressor negotiated during the handshake for this connection, if any.

This attribute is nil for connections that haven’t completed the handshake yet, and for connections that negotiated no compression.

Returns:

  • (String | nil) —

    The compressor.

Since:

  • 2.0.0

[ GitHub ] 

  


# File 'lib/mongo/server/connection_common.rb', line 37



attr_reader :compressor


  








  

    #connected?  ⇒ true, false  (readonly)
  



  

    
Deprecated. 



Determine if the connection is currently connected.


  





    

    
Examples:

        


Is the connection connected?



      
connection.connected?

  


Returns:


    
  
  • 
    (true, false)
—    
    

    If connected.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 47



def connected?
  !!socket
end


  








  

    #pid  ⇒ Integer  (readonly)
  

  

    This method is for internal use only.
  



  

    
  





  
Returns:


    
  
  • 
    (Integer)
—    
    

    pid The process id when the connection was created.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 53



attr_reader :pid


  








  

    #socket   (readonly, private)
  



  

    
  





  
Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 116



attr_reader :socket


  







Instance Method Details



  

    #add_server_diagnostics   (private)
  



  

    

Yields to the block and, if the block raises an exception, adds a note to the exception with the address of the specified server.



This method is intended to add server address information to exceptions raised during execution of operations on servers.


  





  
Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 145



def add_server_diagnostics
  yield
# Note that the exception should already have been mapped to a
# Mongo::Error subclass when it gets to this method.
rescue Error::SocketError, Error::SocketTimeoutError => e
  # Server::Monitor::Connection does not reference its server, but
  # knows its address. Server::Connection delegates the address to its
  # server.
  note = +"on #{address.seed}"
  if respond_to?(:id)
    note << ", connection #{generation}:#{id}"
  end
  # Non-monitoring connections have service id.
  # Monitoring connections do not.
  if respond_to?(:service_id) && service_id
    note << ", service id #{service_id}"
  end
  e.add_note(note)
  if respond_to?(:generation)
    # Non-monitoring connections
    e.generation = generation
    if respond_to?(:global_id)
      e.connection_global_id = global_id
    end
    if respond_to?(:description)
      e.service_id = service_id
    end
  end
  raise e
end


  








  

    #ensure_connected   (private)
  



  

    
  





  
Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 189



def ensure_connected
  begin
    unless socket
      raise ArgumentError, "Connection #{generation}:#{id} for #{address.seed} is not connected"
    end
    if @error
      raise Error::ConnectionPerished, "Connection #{generation}:#{id} for #{address.seed} is perished"
    end
    result = yield socket
    success = true
    result
  ensure
    unless success
      @error = true
    end
  end
end


  








  

    #handshake_command(handshake_document)  ⇒ Protocol::Message 
  

  

    This method is for internal use only.
  



  

    

Build a command that should be used for connection handshake.


  





  
Parameters:


    
  
  • 
    handshake_document
    (BSON::Document)
—    
    

    Document that should be sent to a server for handshake purpose.
    

    
  
    • 



Returns:


    
  
  • 
    (Protocol::Message)
—    
    

    Command that should be sent to a server for handshake purposes.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 94



def handshake_command(handshake_document)
  if handshake_document['apiVersion'] || handshake_document['loadBalanced']
    Protocol::Msg.new(
      [], {}, handshake_document.merge({'$db' => Database::ADMIN})
    )
  else
    Protocol::Query.new(
      Database::ADMIN,
      Database::COMMAND,
      handshake_document,
      :limit => -1
    )
  end
end


  








  

    #handshake_document(app_metadata, speculative_auth_doc: nil, load_balancer: false, server_api: nil)  ⇒ BSON::Document 
  

  

    This method is for internal use only.
  



  

    

Build a document that should be used for connection handshake.


  





  
Parameters:


    
  
  • 
    app_metadata
    (Server::AppMetadata)
—    
    

    Application metadata
    

    
  
    • 
  
  • 
    speculative_auth_doc
    (BSON::Document)
—    
    

    The speculative authentication document, if any.
    

    
  
    • 
  
  • 
    load_balancer
    (true | false)
—    
    

    Whether the connection is to a load balancer.
    

    
  
    • 
  
  • 
    server_api
    (Hash | nil)
—    
    

    server_api ::Mongo::Server API version.
    

    
  
    • 



Returns:


    
  
  • 
    (BSON::Document)
—    
    

    Document that should be sent to a server for handshake purposes.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 68



def handshake_document(app_metadata, speculative_auth_doc: nil, load_balancer: false, server_api: nil)
  serv_api = app_metadata.server_api || server_api
  document = if serv_api
               HELLO_DOC.merge(Utils.transform_server_api(serv_api))
             else
               LEGACY_HELLO_DOC
             end
  document.merge(app_metadata.validated_document).tap do |doc|
    if speculative_auth_doc
      doc.update(speculativeAuthenticate: speculative_auth_doc)
    end
    if load_balancer
      doc.update(loadBalanced: true)
    end
  end
end


  








  

    #set_compressor!(reply)   (private)
  



  

    
  





  
Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 118



def set_compressor!(reply)
  server_compressors = reply['compression']

  if options[:compressors]
    if intersection = (server_compressors & options[:compressors])
      @compressor = intersection.first
    else
      msg = if server_compressors
        "The server at #{address} has no compression algorithms in common with those requested. " +
          "Server algorithms: #{server_compressors.join(', ')}; " +
          "Requested algorithms: #{options[:compressors].join(', ')}. " +
          "Compression will not be used"
      else
        "The server at #{address} did not advertise compression support. " +
          "Requested algorithms: #{options[:compressors].join(', ')}. " +
          "Compression will not be used"
      end
      log_warn(msg)
    end
  end
end


  








  

    #ssl_options   (private)
  



  

    
  





  
Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/server/connection_common.rb', line 176



def ssl_options
  @ssl_options ||= if options[:ssl]
    options.select { |k, v| k.to_s.start_with?('ssl') }
  else
    # Due to the way options are propagated from the client, if we
    # decide that we don't want to use TLS we need to have the :ssl
    # option explicitly set to false or the value provided to the
    # connection might be overwritten by the default inherited from
    # the client.
    {ssl: false}
  end.freeze
end