Class: Logster::RedisStore

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

Constant Summary collapse

ENV_PREFIX = 
"logster-env-"
BULK_ENV_GET_LUA = 
<<~LUA
  local results = {};
  for i = 1, table.getn(KEYS), 1 do
    results[i] = { KEYS[i], redis.call('LRANGE', KEYS[i], 0, -1) };
  end
  return results;
LUA

Instance Attribute Summary collapse

Attributes inherited from BaseStore

#allow_custom_patterns, #ignore, #level, #max_retention, #skip_empty

Instance Method Summary collapse

Methods inherited from BaseStore

#clear_patterns_cache, #report

Constructor Details

#initialize(redis = nil) ⇒ RedisStore

Returns a new instance of RedisStore.



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# File 'lib/logster/redis_store.rb', line 16

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 13

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 13

def redis
  @redis
end

#redis_prefix ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 310

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 13

def redis_raw_connection
  @redis_raw_connection
end

Instance Method Details

#bulk_delete(message_keys, grouping_keys) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 55

def bulk_delete(message_keys, grouping_keys)
  groups = find_pattern_groups(load_messages: true)
  @redis.multi do |pipeline|
    groups.each do |group|
      group.messages = group.messages.reject { |m| message_keys.include?(m.key) }
      save_pattern_group(group, redis: pipeline) if group.changed?
    end
    pipeline.hdel(hash_key, message_keys)
    pipeline.hdel(grouping_key, grouping_keys)
    message_keys.each do |k|
      pipeline.lrem(list_key, -1, k)
      delete_env(k, redis: pipeline)
    end
  end
end

#bulk_get(message_keys, with_env: true) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 243

def bulk_get(message_keys, with_env: true)
  return [] if !message_keys || message_keys.size == 0
  envs = nil
  if with_env
    envs = {}
    @redis
      .eval(
        BULK_ENV_GET_LUA,
        keys: message_keys.map { |k| env_prefix(k, with_namespace: true) },
      )
      .to_h
      .each do |k, v|
        next if v.size == 0
        parsed = v.size == 1 ? JSON.parse(v[0]) : v.map { |e| JSON.parse(e) }
        envs[env_unprefix(k, with_namespace: true)] = parsed
      end
  end
  messages =
    @redis
      .hmget(hash_key, message_keys)
      .map! do |json|
        next if !json || json.size == 0
        message = Message.from_json(json)
        if with_env && envs
          env = envs[message.key]
          message.env = env || {} if !message.env || message.env.size == 0
        end
        message
      end
  messages.compact!
  messages
end

#clear ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 162

def clear
  RedisRateLimiter.clear_all(@redis)
  @redis.del(solved_key)
  all_keys = @redis.lrange(list_key, 0, -1)
  @redis.del(list_key)
  protected_keys = @redis.smembers(protected_key) || []
  if protected_keys.empty?
    @redis.del(hash_key)
    all_keys.each { |k| delete_env(k) }
    @redis.del(pattern_groups_key)
    @redis.del(grouping_key)
  else
    protected_messages = @redis.mapped_hmget(hash_key, *protected_keys)
    @redis.del(hash_key)
    @redis.mapped_hmset(hash_key, protected_messages)
    (all_keys - protected_keys).each { |k| delete_env(k) }

    sorted =
      protected_messages
        .values
        .map do |string|
          begin
            Message.from_json(string)
          rescue StandardError
            nil
          end
        end
        .compact
        .sort
        .map(&:key)

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

    find_pattern_groups(load_messages: true).each do |group|
      group.messages = group.messages.select { |m| sorted.include?(m.key) }
      save_pattern_group(group) if group.changed?
    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 206

def clear_all
  @redis.lrange(list_key, 0, -1).each { |k| delete_env(k) }
  @redis.del(list_key)
  @redis.del(protected_key)
  @redis.del(hash_key)
  @redis.del(grouping_key)
  @redis.del(solved_key)
  @redis.del(ignored_logs_count_key)
  @redis.del(pattern_groups_key)
  Logster::Pattern.child_classes.each { |klass| @redis.del(klass.set_name) }
  @redis.keys.each do |key|
    @redis.del(key) if key.include?(Logster::RedisRateLimiter::PREFIX)
    @redis.del(key) if key.start_with?(ip_rate_limit_key(""))
  end
end

#count ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 92

def count
  @redis.llen(list_key)
end

#delete(msg) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 41

def delete(msg)
  groups = find_pattern_groups() { |pat| msg.message =~ pat }
  @redis.multi do |pipeline|
    groups.each do |group|
      group.remove_message(msg)
      save_pattern_group(group, redis: pipeline) if group.changed?
    end
    pipeline.hdel(hash_key, msg.key)
    delete_env(msg.key, redis: pipeline)
    pipeline.hdel(grouping_key, msg.grouping_key)
    pipeline.lrem(list_key, -1, msg.key)
  end
end

#find_pattern_groups(load_messages: false) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 355

def find_pattern_groups(load_messages: false)
  patterns =
    @patterns_cache.fetch(Logster::GroupingPattern::CACHE_KEY) do
      Logster::GroupingPattern.find_all(store: self)
    end
  patterns =
    patterns.select do |pattern|
      if block_given?
        yield(pattern)
      else
        true
      end
    end
  return [] if patterns.size == 0
  mapped = patterns.map(&:inspect)
  jsons = @redis.hmget(pattern_groups_key, mapped)
  jsons.map! do |json|
    if json && json.size > 0
      group = Logster::Group.from_json(json)
      group.pattern = patterns[mapped.index(group.key)]
      group.messages = bulk_get(group.messages_keys, with_env: false) if load_messages
      group
    end
  end
  jsons.compact!
  jsons
end

#get(message_key, load_env: true) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 222

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

  message = Message.from_json(json)
  message.env = get_env(message_key) || {} if load_env
  message
end

#get_all_ignore_count ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 340

def get_all_ignore_count
  @redis.hgetall(ignored_logs_count_key)
end

#get_all_messages(with_env: true) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 231

def get_all_messages(with_env: true)
  bulk_get(@redis.lrange(list_key, 0, -1), with_env: with_env)
end

#get_env(message_key) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 276

def get_env(message_key)
  envs = @redis.lrange(env_prefix(message_key), 0, -1)
  return if !envs || envs.size == 0
  envs.size == 1 ? JSON.parse(envs[0]) : envs.map { |j| JSON.parse(j) }
end

#get_patterns(set_name) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 328

def get_patterns(set_name)
  @redis.smembers(set_name)
end

#increment_ignore_count(pattern) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 332

def increment_ignore_count(pattern)
  @redis.hincrby(ignored_logs_count_key, pattern, 1)
end

#insert_pattern(set_name, pattern) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 320

def insert_pattern(set_name, pattern)
  @redis.sadd(set_name, [pattern])
end

#latest(opts = {}) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 104

def latest(opts = {})
  limit = opts[:limit] || 50
  severity = opts[:severity]
  before = opts[:before]
  after = opts[:after]
  search = opts[:search]
  with_env = opts.key?(:with_env) ? opts[:with_env] : true
  known_groups = opts[:known_groups]&.dup || []

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

  return [] unless start && finish

  results = []
  pattern_groups = find_pattern_groups(load_messages: true)

  direction = after ? 1 : -1

  begin
    keys = @redis.lrange(list_key, start, finish) || []
    break if !keys || keys.count <= 0
    rows = bulk_get(keys, with_env: with_env).reverse

    temp = []

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

      row = filter_search(row, search)
      if row
        matches_pattern = pattern_groups.any? { |g| row.message =~ g.pattern }
        group = pattern_groups.find { |g| g.messages_keys.include?(row.key) }
        if group && !known_groups.include?(group.key)
          known_groups << group.key
          temp << serialize_group(group, row.key)
        elsif !matches_pattern
          temp << row
        end
      end
    end

    temp.reverse!
    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 282

def protect(message_key)
  if message = get(message_key, load_env: false)
    message.protected = true
    update_message(message)
  end
end

#rate_limited?(ip_address, perform: false, limit: 60) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/logster/redis_store.rb', line 344

def rate_limited?(ip_address, perform: false, limit: 60)
  key = ip_rate_limit_key(ip_address)

  limited = @redis.call([:exists, key])
  limited = limited != 0 if Integer === limited

  @redis.setex key, limit, "" if perform && !limited

  limited
end

#rate_limits ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 316

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 306

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 302

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

#remove_ignore_count(pattern) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 336

def remove_ignore_count(pattern)
  @redis.hdel(ignored_logs_count_key, pattern)
end

#remove_pattern(set_name, pattern) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 324

def remove_pattern(set_name, pattern)
  @redis.srem(set_name, [pattern])
end

#remove_pattern_group(pattern) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 391

def remove_pattern_group(pattern)
  @redis.hdel(pattern_groups_key, pattern.inspect)
end

#replace_and_bump(message) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 71

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

  @redis.multi do |pipeline|
    pipeline.hset(hash_key, message.key, message.to_json(exclude_env: true))
    push_env(message.key, message.env_buffer, redis: pipeline) if message.has_env_buffer?
    pipeline.lrem(list_key, -1, message.key)
    pipeline.rpush(list_key, message.key)
  end
  message.env_buffer = [] if message.has_env_buffer?
  check_rate_limits(message.severity)

  true
end

#save(message) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 24

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

  @redis.multi do |pipeline|
    pipeline.hset(grouping_key, message.grouping_key, message.key)
    pipeline.rpush(list_key, message.key)
    update_message(message, save_env: true, redis: pipeline)
  end

  trim
  check_rate_limits(message.severity)

  true
end

#save_pattern_group(group, redis: @redis) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 383

def save_pattern_group(group, redis: @redis)
  if group.messages_keys.size == 0
    redis.hdel(pattern_groups_key, group.key)
  else
    redis.hset(pattern_groups_key, group.key, group.to_json)
  end
end

#similar_key(message) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 88

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 96

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

#solved ⇒ Object 



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

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

#unprotect(message_key) ⇒ Object 



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# File 'lib/logster/redis_store.rb', line 289

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