Class: ElasticAPM::Transport::Connection Private

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/elastic_apm/transport/connection.rb,
lib/elastic_apm/transport/connection/http.rb,
lib/elastic_apm/transport/connection/proxy_pipe.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Defined Under Namespace

Classes: Http, ProxyPipe

Constant Summary

Constants included from Logging

Logging::LEVELS, Logging::PREFIX

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging

#debug, #error, #fatal, #info, #warn

Constructor Details

#initialize(config) ⇒ Connection

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

A connection holds an instance ‘http` of an Http::Connection.

The HTTP::Connection itself is not thread safe.

The connection sends write requests and close requests to ‘http`, and has to ensure no write requests are sent after closing `http`.

The connection schedules a separate thread to close an ‘http` connection some time in the future. To avoid the thread interfering with ongoing write requests to `http`, write and close requests have to be synchronized.



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# File 'lib/elastic_apm/transport/connection.rb', line 38

def initialize(config)
  @config = config
  @metadata = JSON.fast_generate(
    Serializers::MetadataSerializer.new(config).build(
      Metadata.new(config)
    )
  )
  @url = "#{config.server_url}/intake/v2/events"
  @mutex = Mutex.new
end

Instance Attribute Details

#http ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/transport/connection.rb', line 49

def http
  @http
end

Instance Method Details

#flush(reason = :force) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/transport/connection.rb', line 77

def flush(reason = :force)
  # Could happen from the timertask so we need to sync
  @mutex.synchronize do
    return if http.nil?
    http.close(reason)
  end
end

#inspect ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/transport/connection.rb', line 85

def inspect
  format(
    '<%s url:%s closed:%s >',
    super.split.first, @url, http&.closed?
  )
end

#write(str) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/transport/connection.rb', line 51

def write(str)
  return false if @config.disable_send

  begin
    bytes_written = 0

    # The request might get closed from timertask so let's make sure we
    # hold it open until we've written.
    @mutex.synchronize do
      connect if http.nil? || http.closed?
      bytes_written = http.write(str)
    end

    flush(:api_request_size) if bytes_written >= @config.api_request_size
  rescue IOError => e
    error('Connection error: %s', e.inspect)
    flush(:ioerror)
  rescue Errno::EPIPE => e
    error('Connection error: %s', e.inspect)
    flush(:broken_pipe)
  rescue Exception => e
    error('Connection error: %s', e.inspect)
    flush(:connection_error)
  end
end