Class: Logster::RedisStore

Inherits:
BaseStore show all
Defined in:
lib/logster/redis_store.rb

Instance Attribute Summary collapse

Attributes inherited from BaseStore

#ignore, #level, #max_retention, #skip_empty

Instance Method Summary collapse

Methods inherited from BaseStore

#report

Constructor Details

#initialize(redis = nil) ⇒ RedisStore

Returns a new instance of RedisStore.



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# File 'lib/logster/redis_store.rb', line 117

def initialize(redis = nil)
  super()
  @redis = redis || Redis.new
  @max_backlog = 1000
  @redis_prefix = nil
  @redis_raw_connection = nil
end

Instance Attribute Details

#max_backlog ⇒ Object

Returns the value of attribute max_backlog.



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# File 'lib/logster/redis_store.rb', line 114

def max_backlog
  @max_backlog
end

#redis ⇒ Object

Returns the value of attribute redis.



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# File 'lib/logster/redis_store.rb', line 114

def redis
  @redis
end

#redis_prefix ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 306

def redis_prefix
  return 'default'.freeze if !@redis_prefix
  @prefix_is_proc ||= @redis_prefix.respond_to?(:call)
  @prefix_is_proc ? @redis_prefix.call : @redis_prefix
end

#redis_raw_connection ⇒ Object

Returns the value of attribute redis_raw_connection.



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# File 'lib/logster/redis_store.rb', line 114

def redis_raw_connection
  @redis_raw_connection
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 232

def clear
  RedisRateLimiter.clear_all(@redis)
  @redis.del(solved_key)
  @redis.del(list_key)
  keys = @redis.smembers(protected_key) || []
  if keys.empty?
    @redis.del(hash_key)
  else
    protected = @redis.mapped_hmget(hash_key, *keys)
    @redis.del(hash_key)
    @redis.mapped_hmset(hash_key, protected)

    sorted = protected
      .values
      .map { |string|
        Message.from_json(string) rescue nil
      }
      .compact
      .sort
      .map(&:key)

    @redis.pipelined do
      sorted.each do |message_key|
        @redis.rpush(list_key, message_key)
      end
    end
  end
end

#clear_all ⇒ Object

Delete everything, included protected messages (use in tests)



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# File 'lib/logster/redis_store.rb', line 263

def clear_all
  @redis.del(list_key)
  @redis.del(protected_key)
  @redis.del(hash_key)
  @redis.del(grouping_key)
  @redis.del(solved_key)
end

#count ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 172

def count
  @redis.llen(list_key)
end

#delete(msg) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 144

def delete(msg)
  @redis.multi do
    @redis.hdel(hash_key, msg.key)
    @redis.hdel(grouping_key, msg.grouping_key)
    @redis.lrem(list_key, -1, msg.key)
  end
end

#get(message_key) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 271

def get(message_key)
  json = @redis.hget(hash_key, message_key)
  return nil unless json

  Message.from_json(json)
end

#latest(opts = {}) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 186

def latest(opts={})
  limit = opts[:limit] || 50
  severity = opts[:severity]
  before = opts[:before]
  after = opts[:after]
  search = opts[:search]

  start, finish = find_location(before, after, limit)

  return [] unless start && finish

  results = []

  direction = after ? 1 : -1

  begin
    keys = @redis.lrange(list_key, start, finish) || []
    break unless keys and keys.count > 0
    rows = @redis.hmget(hash_key, keys)

    temp = []

    rows.each do |s|
      row = Message.from_json(s)
      break if before && before == row.key
      row = nil if severity && !severity.include?(row.severity)

      row = filter_search(row, search)
      temp << row if row
    end

    if direction == -1
      results = temp + results
    else
      results += temp
    end

    start += limit * direction
    finish += limit * direction

    finish = -1 if finish > -1
  end while rows.length > 0 && results.length < limit && start < 0

  results
end

#protect(message_key) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 278

def protect(message_key)
  if message = get(message_key)
    message.protected = true
    update_message(message)
  end
end

#rate_limits ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 312

def rate_limits
  @rate_limits ||= {}
end

#register_rate_limit_per_hour(severities, limit, &block) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 302

def register_rate_limit_per_hour(severities, limit, &block)
  register_rate_limit(severities, limit, 3600, block)
end

#register_rate_limit_per_minute(severities, limit, &block) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 298

def register_rate_limit_per_minute(severities, limit, &block)
  register_rate_limit(severities, limit, 60, block)
end

#replace_and_bump(message) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 152

def replace_and_bump(message)
  # TODO make it atomic
  exists = @redis.hexists(hash_key, message.key)
  return false unless exists

  @redis.multi do
    @redis.hset(hash_key, message.key, message.to_json)
    @redis.lrem(list_key, -1, message.key)
    @redis.rpush(list_key, message.key)
  end

  check_rate_limits(message.severity)

  true
end

#save(message) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 125

def save(message)
  if keys=message.solved_keys
    keys.each do |solved|
      return true if @redis.hget(solved_key, solved)
    end
  end

  @redis.multi do
    @redis.hset(grouping_key, message.grouping_key, message.key)
    @redis.rpush(list_key, message.key)
    update_message(message)
  end

  trim
  check_rate_limits(message.severity)

  true
end

#similar_key(message) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 168

def similar_key(message)
  @redis.hget(grouping_key, message.grouping_key)
end

#solve(message_key) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 176

def solve(message_key)
  if (message = get(message_key)) && (keys = message.solved_keys)
    # add a time so we can expire it
    keys.each do |s_key|
      @redis.hset(solved_key, s_key, Time.now.to_f.to_i)
    end
  end
  clear_solved
end

#solved ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 294

def solved
  @redis.hkeys(solved_key) || []
end

#unprotect(message_key) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 285

def unprotect(message_key)
  if message = get(message_key)
    message.protected = false
    update_message(message)
  else
    raise "Message already deleted"
  end
end