Class: RedisRing::Shard

Inherits:
Object
  • Object
show all
Defined in:
lib/redis_ring/shard.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(shard_config) ⇒ Shard

Returns a new instance of Shard.



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# File 'lib/redis_ring/shard.rb', line 7

def initialize(shard_config)
  @shard_config = shard_config
  @status = :stopped
end

Instance Attribute Details

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/redis_ring/shard.rb', line 5

def pid
  @pid
end

#shard_config ⇒ Object (readonly)

Returns the value of attribute shard_config.



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# File 'lib/redis_ring/shard.rb', line 5

def shard_config
  @shard_config
end

Instance Method Details

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis_ring/shard.rb', line 49

def alive?
  @task && @task.running?
end

#host ⇒ Object 



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# File 'lib/redis_ring/shard.rb', line 16

def host
  shard_config.host
end

#port ⇒ Object 



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# File 'lib/redis_ring/shard.rb', line 20

def port
  shard_config.port
end

#shard_number ⇒ Object 



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# File 'lib/redis_ring/shard.rb', line 12

def shard_number
  shard_config.shard_number
end

#start ⇒ Object 



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# File 'lib/redis_ring/shard.rb', line 34

def start
  if @status == :started
    @task.start unless @task.running?
  else
    shard_config.save
    @task = fork_redis_server
    @status = :started
  end
end

#status ⇒ Object 



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# File 'lib/redis_ring/shard.rb', line 24

def status
  if @status == :stopped
    return alive? ? :stopping : :stopped
  elsif @status == :started
    return alive? ? :running : :dead
  else
    raise RuntimeException.new("Unknown status: #{@status.inspect}")
  end
end

#stop ⇒ Object 



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# File 'lib/redis_ring/shard.rb', line 44

def stop
  @task.stop
  @status = :stopped
end