Class: ConsistentCluster::SyncClient

Inherits:
Object
  • Object
show all
Defined in:
lib/consistent-cluster/sync-client.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ SyncClient 



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# File 'lib/consistent-cluster/sync-client.rb', line 12

def initialize(options)

  @data = {}
  @cluster = {}
  @node_register = {}

  replicas = options[:consistent_hashing_replicas] || 3
  @ring = ConsistentHashing::Ring.new([],replicas)

  @create_proc = options[:create_proc]
  @destroy_proc = options[:destroy_proc]
  @after_sync_proc = options[:after_sync_proc] 

  @to_sync,@syncing = false,false
  
  @path = options[:zookeeper_path]

  @zk = ZK.new(options[:zookeeper_service],reconnect: true)

  @zk.register(@path) do |event|
    sync_services
  end

  sync_services

  #on_state_change
  #on_connecting
  #on_expired_session
  @zk.on_connected do
    reconnect_callback
  end

  @shard_num = 0
end

Instance Method Details

#reconnect_callback ⇒ Object 



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# File 'lib/consistent-cluster/sync-client.rb', line 47

def reconnect_callback
  case @zk.state
  when :connected
    sync_services
  end
end

#shard(key = nil) ⇒ Object 



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# File 'lib/consistent-cluster/sync-client.rb', line 54

def shard(key=nil)
  cluster_sum = @cluster.length
  raise "no service available at #{@path}" if cluster_sum < 1
  if key
    point = @ring.point_for(key)
    server = @cluster[point.node]
  else
    @shard_num += 1
    @shard_num = @shard_num%cluster_sum
    server = @cluster.values[@shard_num]
  end
  server
end