Class: Karafka::Cli::Topics::Repartition

Inherits:
Base
  • Object
show all
Defined in:
lib/karafka/cli/topics/repartition.rb

Overview

Increases number of partitions on topics that have less partitions than defined Will not create topics if missing.

Instance Method Summary collapse

Methods included from Helpers::Colorize

#green, #grey, #red, #yellow

Instance Method Details

#call ⇒ Boolean

Returns true if anything was repartitioned, otherwise false.

Returns:

  • (Boolean) —

    true if anything was repartitioned, otherwise false



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# File 'lib/karafka/cli/topics/repartition.rb', line 10

def call
  any_repartitioned = false

  existing_partitions = existing_topics.map do |topic|
    [topic.fetch(:topic_name), topic.fetch(:partition_count)]
  end.to_h

  declaratives_routing_topics.each do |topic|
    name = topic.name

    desired_count = topic.config.partitions
    existing_count = existing_partitions.fetch(name, false)

    if existing_count && existing_count < desired_count
      puts "Increasing number of partitions to #{desired_count} on topic #{name}..."
      Admin.create_partitions(name, desired_count)
      change = desired_count - existing_count
      puts "#{green('Created')} #{change} additional partitions on topic #{name}."
      any_repartitioned = true
    elsif existing_count
      puts "#{yellow('Skipping')} because topic #{name} has #{existing_count} partitions."
    else
      puts "#{yellow('Skipping')} because topic #{name} does not exist."
    end
  end

  any_repartitioned
end