Class: Aerospike::PartitionParser

Inherits:
Object
  • Object
show all
Defined in:
lib/aerospike/cluster/partition_parser.rb

Overview

:nodoc:

Constant Summary collapse

PARTITION_GENERATION = 
"partition-generation"
REPLICAS_ALL = 
"replicas-all"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node, conn) ⇒ PartitionParser

Returns a new instance of PartitionParser.



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# File 'lib/aerospike/cluster/partition_parser.rb', line 29

def initialize(node, conn)
  @node = node
  @conn = conn
end

Instance Attribute Details

#copied ⇒ Object

Returns the value of attribute copied.



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# File 'lib/aerospike/cluster/partition_parser.rb', line 24

def copied
  @copied
end

#partition_generation ⇒ Object

Returns the value of attribute partition_generation.



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# File 'lib/aerospike/cluster/partition_parser.rb', line 24

def partition_generation
  @partition_generation
end

Instance Method Details

#update_partitions(current_map) ⇒ Object 



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# File 'lib/aerospike/cluster/partition_parser.rb', line 34

def update_partitions(current_map)
  # Use low-level info methods and parse byte array directly for maximum performance.
  # Receive format: replicas-all\t
  #                 <ns1>:<count>,<base 64 encoded bitmap1>,<base 64 encoded bitmap2>...;
  #                 <ns2>:<count>,<base 64 encoded bitmap1>,<base 64 encoded bitmap2>...;\n
  info_map = Info.request(@conn, PARTITION_GENERATION, REPLICAS_ALL)

  @partition_generation = info_map[PARTITION_GENERATION].to_i

  info = info_map[REPLICAS_ALL]
  if !info || info.length == 0
    raise Aerospike::Exceptions::Connection.new("#{REPLICAS_ALL} response for node #{@node.name} is empty", @node)
  end

  @buffer = info
  @length = info.length
  @offset = 0

  new_map = nil
  copied = false
  beginning = @offset

  while @offset < @length && @buffer[@offset] != '\n'
    namespace = parse_name
    replica_count = parse_replica_count

    replica_array = current_map[namespace]
    if !replica_array
      if !copied
        # Make shallow copy of map.
        new_map = current_map.clone
        copied = true
      end

      replica_array = Atomic.new(Array.new(replica_count))
      new_map[namespace] = replica_array
    end

    for replica in 0...replica_count do
      node_array = (replica_array.get)[replica]

      if !node_array
        if !copied
          # Make shallow copy of map.
          new_map = current_map.clone
          copied = true
        end

        node_array = Atomic.new(Array.new(Aerospike::Node::PARTITIONS))
        new_map[namespace].update{|v| v[replica] = node_array; v}
      end

      restore_buffer = parse_bitmap
      i = 0
      while i < Aerospike::Node::PARTITIONS
        if (restore_buffer[i>>3].ord & (0x80 >> (i & 7))) != 0
          node_array.update{|v| v[i] = @node; v}
        end
        i = i.succ
      end
    end
  end

  copied ? new_map : nil
end