Class: Redis::Dump

Inherits:
Object
  • Object
show all
Extended by:
ClassMethods
Defined in:
lib/redis/dump.rb

Defined Under Namespace

Modules: ClassMethods, VERSION Classes: Problem

Constant Summary collapse

VALID_TYPES = 
['string', 'set', 'list', 'zset', 'hash', 'none'].freeze

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ClassMethods

dump_strings, set_value, set_value_hash, set_value_list, set_value_none, set_value_set, set_value_string, set_value_zset, stringify, stringify_hash, stringify_list, stringify_none, stringify_set, stringify_string, stringify_zset, type, value, value_hash, value_list, value_none, value_set, value_string, value_zset

Constructor Details

#initialize(dbs = nil, uri = "redis://#{Redis::Dump.host}:#{Redis::Dump.port}") ⇒ Dump

Returns a new instance of Dump.



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# File 'lib/redis/dump.rb', line 33

def initialize(dbs=nil,uri="redis://#{Redis::Dump.host}:#{Redis::Dump.port}")
  @redis_connections = {}
  @uri = uri
  unless dbs.nil?
    @dbs = Range === dbs ? dbs : (dbs..dbs)
    @dbs = (@dbs.first.to_i..@dbs.last.to_i) # enforce integers
    @dbs.to_a.each { |db| redis(db) } # open_all_connections
  end
end

Class Attribute Details

.chunk_size ⇒ Object

Returns the value of attribute chunk_size.



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# File 'lib/redis/dump.rb', line 23

def chunk_size
  @chunk_size
end

.debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/redis/dump.rb', line 23

def debug
  @debug
end

.encoder ⇒ Object

Returns the value of attribute encoder.



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# File 'lib/redis/dump.rb', line 23

def encoder
  @encoder
end

.host ⇒ Object

Returns the value of attribute host.



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# File 'lib/redis/dump.rb', line 23

def host
  @host
end

.parser ⇒ Object

Returns the value of attribute parser.



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# File 'lib/redis/dump.rb', line 23

def parser
  @parser
end

.port ⇒ Object

Returns the value of attribute port.



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# File 'lib/redis/dump.rb', line 23

def port
  @port
end

.safe ⇒ Object

Returns the value of attribute safe.



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# File 'lib/redis/dump.rb', line 23

def safe
  @safe
end

.with_optimizations ⇒ Object

Returns the value of attribute with_optimizations.



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# File 'lib/redis/dump.rb', line 23

def with_optimizations
  @with_optimizations
end

Instance Attribute Details

#dbs ⇒ Object

Returns the value of attribute dbs.



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# File 'lib/redis/dump.rb', line 31

def dbs
  @dbs
end

#redis_connections ⇒ Object (readonly)

Returns the value of attribute redis_connections.



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# File 'lib/redis/dump.rb', line 32

def redis_connections
  @redis_connections
end

#uri ⇒ Object

Returns the value of attribute uri.



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# File 'lib/redis/dump.rb', line 31

def uri
  @uri
end

Class Method Details

.ld(msg) ⇒ Object 



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# File 'lib/redis/dump.rb', line 24

def ld(msg)
  STDERR.puts "#%.4f: %s" % [Time.now.utc.to_f, msg] if debug
end

.memory_usage ⇒ Object 



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# File 'lib/redis/dump.rb', line 27

def memory_usage
  `ps -o rss= -p #{Process.pid}`.to_i # in kb
end

Instance Method Details

#connect(this_uri) ⇒ Object 



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# File 'lib/redis/dump.rb', line 45

def connect(this_uri)
  #self.class.ld 'CONNECT: ' << this_uri
  Redis.connect :url => this_uri
end

#dump(filter = nil) ⇒ Object

See each_key



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# File 'lib/redis/dump.rb', line 57

def dump filter=nil
  filter ||= '*'
  entries = []
  each_database do |redis|
    chunk_entries = []
    dump_keys = redis.keys(filter)
    dump_keys_size = dump_keys.size
    Redis::Dump.ld "Memory after loading keys: #{Redis::Dump.memory_usage}kb"
    dump_keys.each_with_index do |key,idx|
      entry, idxplus = key, idx+1
      #self.class.ld " #{key} (#{key_dump['type']}): #{key_dump['size'].to_bytes}"
      #entry_enc = self.class.encoder.encode entry
      if block_given?
        chunk_entries << entry
        process_chunk idx, dump_keys_size do |count|
          Redis::Dump.ld " dumping #{chunk_entries.size} (#{count}) from #{redis.client.id}"
          output_buffer = []
          chunk_entries.select! do |key| 
            type = Redis::Dump.type(redis, key)
            if self.class.with_optimizations && type == 'string' 
              true
            else
              output_buffer.push self.class.encoder.encode(Redis::Dump.dump(redis, key, type))
              false
            end
          end
          unless output_buffer.empty?
            yield output_buffer 
          end
          unless chunk_entries.empty?
            yield Redis::Dump.dump_strings(redis, chunk_entries) { |obj| self.class.encoder.encode(obj) } 
          end
          output_buffer.clear
          chunk_entries.clear
        end
      else
        entries << self.class.encoder.encode(Redis::Dump.dump(redis, entry))
      end
    end
  end
  entries
end

#each_database ⇒ Object 



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# File 'lib/redis/dump.rb', line 50

def each_database
  @redis_connections.keys.sort.each do |redis_uri|
    yield redis_connections[redis_uri]
  end
end

#load(string_or_stream, &each_record) ⇒ Object 



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# File 'lib/redis/dump.rb', line 133

def load(string_or_stream, &each_record)
  count = 0
  Redis::Dump.ld " LOAD SOURCE: #{string_or_stream}"
  Redis::Dump.parser.parse string_or_stream do |obj|
    unless @dbs.member?(obj["db"].to_i)
      Redis::Dump.ld "db out of range: #{obj["db"]}"
      next
    end
    this_redis = redis(obj["db"])
    #Redis::Dump.ld "load[#{this_redis.hash}, #{obj}]"
    if each_record.nil? 
      if Redis::Dump.safe && this_redis.exists(obj['key'])
        #Redis::Dump.ld " record exists (no change)"
        next
      end
      Redis::Dump.set_value this_redis, obj['key'], obj['type'], obj['value'], obj['ttl']
    else
      each_record.call obj
    end
    count += 1
  end
  count
end

#redis(db) ⇒ Object 



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# File 'lib/redis/dump.rb', line 42

def redis(db)
  redis_connections["#{uri}/#{db}"] ||= connect("#{uri}/#{db}")
end

#report(filter = '*') ⇒ Object 



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# File 'lib/redis/dump.rb', line 106

def report filter='*'
  values = []
  total_size, dbs = 0, {}
  each_database do |redis|
    chunk_entries = []
    dump_keys = redis.keys(filter)
    dump_keys_size = dump_keys.size
    dump_keys.each_with_index do |key,idx|
      entry, idxplus = Redis::Dump.report(redis, key), idx+1
      chunk_entries << entry
      process_chunk idx, dump_keys_size do |count|
        Redis::Dump.ld " reporting on #{chunk_entries.size} (#{idxplus}) from #{redis.client.id}"
        chunk_entries.each do |e|
          #puts record if obj.global.verbose >= 1
          dbs[e['db']] ||= 0
          dbs[e['db']] += e['size']
          total_size += e['size']
        end
        chunk_entries.clear
      end
    end
  end
  puts dbs.keys.sort.collect { |db| "  db#{db}: #{dbs[db].to_bytes}" }
  puts "total: #{total_size.to_bytes}"
  values
end