class Fluent::RedisOutput
Attributes
db_number[R]
fixed_key_value[R]
host[R]
key_expire[R]
key_name[R]
key_prefix[R]
key_suffix[R]
order[R]
port[R]
redis[R]
score_name[R]
store_type[R]
timeout[R]
value_expire[R]
value_length[R]
value_name[R]
Public Class Methods
new()
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Calls superclass method
# File lib/fluent/plugin/out_redisstore.rb, line 6 def initialize super require 'redis' require 'msgpack' end
Public Instance Methods
configure(conf)
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Calls superclass method
# File lib/fluent/plugin/out_redisstore.rb, line 12 def configure(conf) super @driver = conf.has_key?('driver') ? conf['driver'] : nil @host = conf.has_key?('host') ? conf['host'] : 'localhost' @port = conf.has_key?('port') ? conf['port'].to_i : 6379 @db_number = conf.has_key?('db_number') ? conf['db_number'].to_i : nil @timeout = conf.has_key?('timeout') ? conf['timeout'].to_f : 5.0 @key_prefix = conf.has_key?('key_prefix') ? conf['key_prefix'] : '' @key_suffix = conf.has_key?('key_suffix') ? conf['key_suffix'] : '' @store_type = conf.has_key?('store_type') ? conf['store_type'] : 'zset' @key_name = conf['key_name'] @fixed_key_value = conf.has_key?('fixed_key_value') ? conf['fixed_key_value'] : nil @score_name = conf['score_name'] @value_name = conf['value_name'] @key_expire = conf.has_key?('key_expire') ? conf['key_expire'].to_i : -1 @value_expire = conf.has_key?('value_expire') ? conf['value_expire'].to_i : -1 @value_length = conf.has_key?('value_length') ? conf['value_length'].to_i : -1 @order = conf.has_key?('order') ? conf['order'] : 'asc' end
format(tag, time, record)
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# File lib/fluent/plugin/out_redisstore.rb, line 59 def format(tag, time, record) identifier = [tag, time].join(".") [identifier, record].to_msgpack end
generate_ltrim_script(key, maxlen, order)
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# File lib/fluent/plugin/out_redisstore.rb, line 190 def generate_ltrim_script(key, maxlen, order) script = "local key = '" + key.to_s + "'\n" script += "local maxlen = " + maxlen.to_s + "\n" script += "local order ='" + order.to_s + "'\n" script += "local len = tonumber(redis.call('LLEN', key))\n" script += "if len > maxlen then\n" script += " if order == 'asc' then\n" script += " local l = len - maxlen\n" script += " return redis.call('LTRIM', key, l, -1)\n" script += " else\n" script += " return redis.call('LTRIM', key, 0, maxlen - 1)\n" script += " end\n" script += "end\n" return script end
generate_zremrangebyrank_script(key, maxlen, order)
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# File lib/fluent/plugin/out_redisstore.rb, line 172 def generate_zremrangebyrank_script(key, maxlen, order) script = "local key = '" + key.to_s + "'\n" script += "local maxlen = " + maxlen.to_s + "\n" script += "local order ='" + order.to_s + "'\n" script += "local len = tonumber(redis.call('ZCOUNT', key, '-inf', '+inf'))\n" script += "if len > maxlen then\n" script += " if order == 'asc' then\n" script += " local l = len - maxlen\n" script += " if l >= 0 then\n" script += " return redis.call('ZREMRANGEBYRANK', key, 0, l)\n" script += " end\n" script += " else\n" script += " return redis.call('ZREMRANGEBYRANK', key, maxlen, -1)\n" script += " end\n" script += "end\n" return script end
operation_for_list(record)
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# File lib/fluent/plugin/out_redisstore.rb, line 134 def operation_for_list(record) if @fixed_key_value k = @fixed_key_value else k = traverse(record, @key_name).to_s end v = traverse(record, @value_name) sk = @key_prefix + k + @key_suffix if @order == 'asc' @redis.rpush sk, v else @redis.lpush sk, v end if @key_expire > 0 @redis.expire sk, @key_expire end if @value_length > 0 script = generate_ltrim_script(sk, @value_length, @order) @redis.eval script end end
operation_for_set(record)
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# File lib/fluent/plugin/out_redisstore.rb, line 119 def operation_for_set(record) if @fixed_key_value k = @fixed_key_value else k = traverse(record, @key_name).to_s end v = traverse(record, @value_name) sk = @key_prefix + k + @key_suffix @redis.sadd sk, v if @key_expire > 0 @redis.expire sk, @key_expire end end
operation_for_string(record)
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# File lib/fluent/plugin/out_redisstore.rb, line 157 def operation_for_string(record) if @fixed_key_value k = @fixed_key_value else k = traverse(record, @key_name).to_s end v = traverse(record, @value_name) sk = @key_prefix + k + @key_suffix @redis.set sk, v if @key_expire > 0 @redis.expire sk, @key_expire end end
operation_for_zset(record)
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# File lib/fluent/plugin/out_redisstore.rb, line 91 def operation_for_zset(record) now = Time.now.to_i if @fixed_key_value k = @fixed_key_value else k = traverse(record, @key_name).to_s end if @score_name s = traverse(record, @score_name) else s = now end v = traverse(record, @value_name) sk = @key_prefix + k + @key_suffix @redis.zadd sk , s, v if @key_expire > 0 @redis.expire sk , @key_expire end if @value_expire > 0 @redis.zremrangebyscore sk , '-inf' , (now - @value_expire) end if @value_length > 0 script = generate_zremrangebyrank_script(sk, @value_length, @order) @redis.eval script end end
shutdown()
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Calls superclass method
# File lib/fluent/plugin/out_redisstore.rb, line 53 def shutdown super @redis.quit end
start()
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Calls superclass method
# File lib/fluent/plugin/out_redisstore.rb, line 35 def start super opt = { :host => @host, :port => @port, :db => @db_number, :timeout => @timeout, :thread_safe => true, } if @driver opt[:driver] = @driver.to_sym end @redis = Redis.new(opt) end
traverse(data, key)
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# File lib/fluent/plugin/out_redisstore.rb, line 206 def traverse(data, key) val = data key.split('.').each{ |k| if val.has_key?(k) val = val[k] else return nil end } return val end
write(chunk)
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# File lib/fluent/plugin/out_redisstore.rb, line 64 def write(chunk) @redis.pipelined { chunk.open { |io| begin MessagePack::Unpacker.new(io).each { |message| begin (tag, record) = message if @store_type == 'zset' operation_for_zset(record) elsif @store_type == 'set' operation_for_set(record) elsif @store_type == 'list' operation_for_list(record) elsif @store_type == 'string' operation_for_string(record) end rescue NoMethodError => e puts e end } rescue EOFError # EOFError always occured when reached end of chunk. end } } end