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Class: Mongo::Cluster::Topology::Unknown

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Base, Forwardable
Instance Chain:
self, NoReplicaSetOptions, Base, ::Mongo::Monitoring::Publishable, ::Mongo::Loggable
Inherits: Mongo::Cluster::Topology::Base
Defined in: lib/mongo/cluster/topology/unknown.rb

Overview

Defines behavior for when a cluster is in an unknown state.

Since:

  • 2.0.0

Constant Summary

::Mongo::Loggable - Included

PREFIX

Class Method Summary

Base - Inherited

.new

Initialize the topology with the options.

Instance Attribute Summary

Base - Inherited

#compatibility_error, #compatible?, #data_bearing_servers?,
#logical_session_timeout

The logical session timeout value in minutes.
#monitoring, #options, #server_descriptions, #cluster

::Mongo::Monitoring::Publishable - Included

#monitoring, #monitoring?

Instance Method Summary

NoReplicaSetOptions - Included

#validate_options

Base - Inherited

#addresses,
#max_election_id

The largest electionId ever reported by a primary.
#max_set_version

The largest setVersion ever reported by a primary.
#new_max_election_id, #new_max_set_version,
#replica_set_name

Get the replica set name configured for this topology.
#server_hosts_match_any?

Compares each server address against the list of patterns.
#validate_options

Validates and/or transforms options as necessary for the topology.

::Mongo::Monitoring::Publishable - Included

#publish_cmap_event, #publish_event, #publish_sdam_event, #command_completed, #command_failed, #command_started, #command_succeeded, #duration

::Mongo::Loggable - Included

#log_debug

Convenience method to log debug messages with the standard prefix.
#log_error

Convenience method to log error messages with the standard prefix.
#log_fatal

Convenience method to log fatal messages with the standard prefix.
#log_info

Convenience method to log info messages with the standard prefix.
#log_warn

Convenience method to log warn messages with the standard prefix.
#logger

Get the logger instance.
#_mongo_log_prefix, #format_message

Instance Attribute Details

#replica_set? ⇒ false (readonly)

An unknown topology is not a replica set.

Examples:

Is the topology a replica set?

Unknown.replica_set?

Returns:

  • (false) —

    Always false.

Since:

  • 2.0.0

[ GitHub ] 

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 92



def replica_set?
  false
end


  








  

    #sharded?  ⇒ false  (readonly)
  



  

    

An unknown topology is not sharded.


  





    

    
Examples:

        


Is the topology sharded?



      
Unknown.sharded?

  


Returns:


    
  
  • 
    (false)
—    
    

    Always false.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 119



def sharded?
  false
end


  








  

    #single?  ⇒ true  (readonly)
  



  

    

An unknown topology is not single.


  





    

    
Examples:

        


Is the topology single?



      
Unknown.single?

  


Returns:


    
  
  • 
    (true)
—    
    

    Always false.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 131



def single?
  false
end


  








  

    #unknown?  ⇒ true  (readonly)
  



  

    

An unknown topology is unknown.


  





    

    
Examples:

        


Is the topology unknown?



      
Unknown.unknown?

  


Returns:


    
  
  • 
    (true)
—    
    

    Always true.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 143



def unknown?
  true
end


  







Instance Method Details



  

    #display_name  ⇒ String 
  



  

    

Get the display name.


  





    

    
Examples:

        


Get the display name.



      
Unknown.display_name

  


Returns:


    
  
  • 
    (String)
—    
    

    The display name.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 39



def display_name
  self.class.name.gsub(/.*::/, '')
end


  








  

    #has_readable_server?(_cluster, _server_selector = nil)  ⇒ false 
  



  

    

Determine if the topology would select a readable server for the provided candidates and read preference.


  





    

    
Examples:

        


Is a readable server present?



      
topology.has_readable_server?(cluster, server_selector)

  


Parameters:



Returns:


    
  
  • 
    (false)
—    
    

    An Unknown topology will never have a readable server.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.4.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 65



def has_readable_server?(_cluster, _server_selector = nil)
  false
end


  








  

    #has_writable_server?(_cluster)  ⇒ false 
  



  

    

Determine if the topology would select a writable server for the provided candidates.


  





    

    
Examples:

        


Is a writable server present?



      
topology.has_writable_server?(servers)

  


Parameters:


    
  
  • 
    cluster
    (Cluster)
—    
    

    The cluster.
    

    
  
    • 



Returns:


    
  
  • 
    (false)
—    
    

    An Unknown topology will never have a writable server.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.4.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 80



def has_writable_server?(_cluster)
  false
end


  








  

    #servers(_servers)  
  



  

    

Select appropriate servers for this topology.


  





    

    
Examples:

        


Select the servers.



      
Unknown.servers(servers)

  


Parameters:


    
  
  • 
    servers
    (Array<Server>)
—    
    

    The known servers.
    

    
  
    • 



Raises:


    
  
  • 
    (Unknown)
—    
    

    Cannot select servers when the topology is unknown.
    

    
  
    • 



Since:


    
  
  • 
    
    

    2.0.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 107



def servers(_servers)
  []
end


  








  

    #summary  
  



  

    
  

    Note:
    


This method is experimental and subject to change.



  



  





  
Since:


    
  
  • 
    
    

    2.7.0
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/mongo/cluster/topology/unknown.rb', line 47



def summary
  details = server_descriptions.keys.join(',')
  "#{display_name}[#{details}]"
end