Class: Fluent::Plugin::GcloudPubSubOutput

Inherits:
Output
  • Object
show all
Includes:
Fluent::PluginHelper::Inject
Defined in:
lib/fluent/plugin/out_gcloud_pubsub.rb

Constant Summary collapse

DEFAULT_BUFFER_TYPE = 
"memory"
DEFAULT_FORMATTER_TYPE = 
"json"

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



41
42
43
44
45
46
 
# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 41

def configure(conf)
  compat_parameters_convert(conf, :buffer, :formatter)
  super
  placeholder_validate!(:topic, @topic)
  @formatter = formatter_create
end

#format(tag, time, record) ⇒ Object 



53
54
55
56
57
58
59
60
 
# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 53

def format(tag, time, record)
  record = inject_values_to_record(tag, time, record)
  attributes = {}
  @attribute_keys.each do |key|
    attributes[key] = record.delete(key)
  end
  [@formatter.format(tag, time, record), attributes].to_msgpack
end

#formatted_to_msgpack_binary? ⇒ Boolean

Returns:

  • (Boolean) 


62
63
64
 
# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 62

def formatted_to_msgpack_binary?
  true
end

#multi_workers_ready? ⇒ Boolean

Returns:

  • (Boolean) 


66
67
68
 
# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 66

def multi_workers_ready?
  true
end

#start ⇒ Object 



48
49
50
51
 
# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 48

def start
  super
  @publisher = Fluent::GcloudPubSub::Publisher.new @project, @key, @autocreate_topic
end

#write(chunk) ⇒ Object 



70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
 
# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 70

def write(chunk)
  topic = extract_placeholders(@topic, chunk.metadata)

  messages = []
  size = 0

  chunk.msgpack_each do |msg, attr|
    msg = Fluent::GcloudPubSub::Message.new(msg, attr)
    if msg.bytesize > @max_message_size
      log.warn 'Drop a message because its size exceeds `max_message_size`', size: msg.bytesize
      next
    end
    if messages.length + 1 > @max_messages || size + msg.bytesize > @max_total_size
      publish(topic, messages)
      messages = []
      size = 0
    end
    messages << msg
    size += msg.bytesize
  end

  if messages.length > 0
    publish(topic, messages)
  end
rescue Fluent::GcloudPubSub::RetryableError => ex
  log.warn "Retryable error occurs. Fluentd will retry.", error_message: ex.to_s, error_class: ex.class.to_s
  raise ex
rescue => ex
  log.error "unexpected error", error_message: ex.to_s, error_class: ex.class.to_s
  log.error_backtrace
  raise ex
end