Class: Droonga::DataAbsorberClient

Inherits:
Object
  • Object
show all
Includes:
Loggable
Defined in:
lib/droonga/data_absorber_client.rb

Defined Under Namespace

Classes: DestinationEqualsToSource, EmptyBody, EmptyResponse

Constant Summary collapse

DEFAULT_MESSAGES_PER_SECOND = 
100
DEFAULT_PROGRESS_INTERVAL_SECONDS = 
3
DEFAULT_HOST = 
NodeName::DEFAULT_HOST
DEFAULT_PORT = 
NodeName::DEFAULT_PORT
DEFAULT_TAG = 
NodeName::DEFAULT_TAG
DEFAULT_DATASET = 
Catalog::Dataset::DEFAULT_NAME

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params) ⇒ DataAbsorberClient

Returns a new instance of DataAbsorberClient.



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# File 'lib/droonga/data_absorber_client.rb', line 53

def initialize(params)
  @params = params

  @messages_per_second = @params[:messages_per_second] ||
                           DEFAULT_MESSAGES_PER_SECOND
  @progress_interval_seconds = @params[:progress_interval_seconds] ||
                                 DEFAULT_PROGRESS_INTERVAL_SECONDS
  @target_role = @params[:target_role]

  @host    = @params[:host]    || DEFAULT_HOST
  @port    = @params[:port]    || DEFAULT_PORT
  @tag     = @params[:tag]     || DEFAULT_TAG
  @dataset = @params[:dataset] || DEFAULT_DATASET

  @source_host    = @params[:source_host]    || @host    || DEFAULT_HOST
  @source_port    = @params[:source_port]    || @port    || DEFAULT_PORT
  @source_tag     = @params[:source_tag]     || @tag     || DEFAULT_TAG
  @source_dataset = @params[:source_dataset] || @dataset || DEFAULT_DATASET

  @receiver_host = @params[:receiver_host] || @host
  @receiver_port = @params[:receiver_port] || 0

  @client_options = @params[:client_options] || {}

  @error_message = nil

  validate_params
end

Instance Attribute Details

#dataset ⇒ Object (readonly)

Returns the value of attribute dataset.



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# File 'lib/droonga/data_absorber_client.rb', line 48

def dataset
  @dataset
end

#error_message ⇒ Object (readonly)

Returns the value of attribute error_message.



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# File 'lib/droonga/data_absorber_client.rb', line 51

def error_message
  @error_message
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/droonga/data_absorber_client.rb', line 48

def host
  @host
end

#messages_per_second ⇒ Object (readonly)

Returns the value of attribute messages_per_second.



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# File 'lib/droonga/data_absorber_client.rb', line 49

def messages_per_second
  @messages_per_second
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/droonga/data_absorber_client.rb', line 47

def params
  @params
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/droonga/data_absorber_client.rb', line 48

def port
  @port
end

#progress_interval_seconds ⇒ Object (readonly)

Returns the value of attribute progress_interval_seconds.



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# File 'lib/droonga/data_absorber_client.rb', line 49

def progress_interval_seconds
  @progress_interval_seconds
end

#source_dataset ⇒ Object (readonly)

Returns the value of attribute source_dataset.



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# File 'lib/droonga/data_absorber_client.rb', line 50

def source_dataset
  @source_dataset
end

#source_host ⇒ Object (readonly)

Returns the value of attribute source_host.



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# File 'lib/droonga/data_absorber_client.rb', line 50

def source_host
  @source_host
end

#source_port ⇒ Object (readonly)

Returns the value of attribute source_port.



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# File 'lib/droonga/data_absorber_client.rb', line 50

def source_port
  @source_port
end

#source_tag ⇒ Object (readonly)

Returns the value of attribute source_tag.



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# File 'lib/droonga/data_absorber_client.rb', line 50

def source_tag
  @source_tag
end

#tag ⇒ Object (readonly)

Returns the value of attribute tag.



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# File 'lib/droonga/data_absorber_client.rb', line 48

def tag
  @tag
end

Instance Method Details

#empty_destination? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/droonga/data_absorber_client.rb', line 131

def empty_destination?
  table_names_in_destination_node.empty?
end

#run ⇒ Object 



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# File 'lib/droonga/data_absorber_client.rb', line 82

def run
  n_absorbers = 0

  absorb_message = {
    "type" => "system.absorb-data",
    "dataset" => @dataset,
    "body" => {
      "host"    => @source_host,
      "port"    => @source_port,
      "tag"     => @source_tag,
      "dataset" => @source_dataset,
      "messagesPerSecond" => @messages_per_second,
      "progressIntervalSeconds" => @progress_interval_seconds,
      "targetRole" => @target_role,
    },
  }
  client = Droonga::Client.new(destination_client_options)
  client.subscribe(absorb_message) do |message|
    case message
    when Droonga::Client::Error
      client.close
      @error_message = message.to_s
    else
      case message["type"]
      when "system.absorb-data.result", "system.absorb-data.error"
        if message["statusCode"] != 200
          client.close
          error = message["body"]
          @error_message = "#{error['name']}: #{error['message']}"
        end
      when "system.absorb-data.progress"
        body = message["body"]
        yield(:n_processed_messages => body["nProcessedMessages"],
              :percentage           => body["percentage"],
              :message              => body["message"])
      when "system.absorb-data.start"
        n_absorbers += 1
      when "system.absorb-data.end"
        n_absorbers -= 1
        client.close if n_absorbers <= 0
      end
    end
  end
end

#source_node_suspendable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/droonga/data_absorber_client.rb', line 127

def source_node_suspendable?
  (source_replica_hosts - [@source_host]).size >= 1
end