Class: NewRelic::Agent::Transaction::ExternalRequestSegment

Inherits:
Segment show all
Defined in:
lib/new_relic/agent/transaction/external_request_segment.rb

Overview

This class represents an external segment in a transaction trace.

Constant Summary collapse

NR_SYNTHETICS_HEADER = 
'X-NewRelic-Synthetics'
NR_SYNTHETICS_INFO_HEADER = 
'X-NewRelic-Synthetics-Info'
APP_DATA_KEY = 
'NewRelicAppData'
EXTERNAL_ALL = 
'External/all'
EXTERNAL_ALL_WEB = 
'External/allWeb'
EXTERNAL_ALL_OTHER = 
'External/allOther'
MISSING_STATUS_CODE = 
'MissingHTTPStatusCode'

Constants inherited from AbstractSegment

AbstractSegment::CALLBACK, AbstractSegment::INSPECT_IGNORE, AbstractSegment::SEGMENT

Instance Attribute Summary collapse

Attributes inherited from Segment

#custom_transaction_attributes, #unscoped_metrics

Attributes inherited from AbstractSegment

#children_time, #duration, #end_time, #exclusive_duration, #guid, #llm_event, #noticed_error, #parent, #record_on_finish, #record_scoped_metric, #start_time, #starting_segment_key, #transaction, #transaction_name

Instance Method Summary collapse

Methods inherited from Segment

#add_agent_attribute, #add_custom_attributes, #attributes, finish, #merge_untrusted_agent_attributes, merge_untrusted_agent_attributes

Methods inherited from AbstractSegment

#all_code_information_present?, #children_time_ranges?, #code_attributes, #code_information=, #concurrent_children?, #finalize, #finish, #finished?, #inspect, #notice_error, #noticed_error_attributes, #params, #params?, #record_metrics?, #record_on_finish?, #record_scoped_metric?, #set_noticed_error, #start, #time_range, #transaction_assigned

Constructor Details

#initialize(library, uri, procedure, start_time = nil) ⇒ ExternalRequestSegment

:nodoc:



27
28
29
30
31
32
33
34
35
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 27

def initialize(library, uri, procedure, start_time = nil) # :nodoc:
  @library = library
  @uri = HTTPClients::URIUtil.obfuscated_uri(uri)
  @procedure = procedure
  @host_header = nil
  @app_data = nil
  @http_status_code = nil
  super(nil, nil, start_time)
end

Instance Attribute Details

#http_status_code ⇒ Object (readonly) 



25
26
27
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 25

def http_status_code
  @http_status_code
end

#library ⇒ Object (readonly) 



25
26
27
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 25

def library
  @library
end

#procedure ⇒ Object (readonly) 



25
26
27
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 25

def procedure
  @procedure
end

#uri ⇒ Object (readonly) 



25
26
27
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 25

def uri
  @uri
end

Instance Method Details

#add_request_headers(request) ⇒ Object

This method adds New Relic request headers to a given request made to an external API and checks to see if a host header is used for the request. If a host header is used, it updates the segment name to match the host header.

object (must belong to a subclass of NewRelic::Agent::HTTPClients::AbstractRequest)

Parameters:



54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 54

def add_request_headers(request)
  process_host_header(request)
  synthetics_header = transaction&.raw_synthetics_header
  synthetics_info_header = transaction&.raw_synthetics_info_header
  insert_synthetics_header(request, synthetics_header, synthetics_info_header) if synthetics_header

  return unless record_metrics?

  transaction.distributed_tracer.insert_headers(request)
rescue => e
  NewRelic::Agent.logger.error('Error in add_request_headers', e)
end

#cross_app_request? ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


93
94
95
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 93

def cross_app_request? # :nodoc:
  !!@app_data
end

#cross_process_id ⇒ Object

:nodoc:



97
98
99
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 97

def cross_process_id # :nodoc:
  @app_data && @app_data[0]
end

#cross_process_transaction_name ⇒ Object

:nodoc:



105
106
107
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 105

def cross_process_transaction_name # :nodoc:
  @app_data && @app_data[1]
end

#get_request_metadata ⇒ String

Obtain an obfuscated String suitable for delivery across public networks that identifies this application and transaction to another application which is also running a New Relic agent. This String can be processed by process_request_metadata on the receiving application.

Returns:

  • (String) —

    obfuscated request metadata to send



117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 117

def get_request_metadata
  NewRelic::Agent.record_api_supportability_metric(:get_request_metadata)
  return unless CrossAppTracing.cross_app_enabled?

  if transaction

    # build hash of CAT metadata
    #
    rmd = {
      NewRelicID: NewRelic::Agent.config[:cross_process_id],
      NewRelicTransaction: [
        transaction.guid,
        false,
        transaction.distributed_tracer.cat_trip_id,
        transaction.distributed_tracer.cat_path_hash
      ]
    }

    # flag cross app in the state so transaction knows to add bits to payload
    #
    transaction.distributed_tracer.is_cross_app_caller = true

    # add Synthetics header if we have it
    #
    rmd[:NewRelicSynthetics] = transaction.raw_synthetics_header if transaction.raw_synthetics_header

    # obfuscate the generated request metadata JSON
    #
    obfuscator.obfuscate(::JSON.dump(rmd))

  end
rescue => e
  NewRelic::Agent.logger.error('error during get_request_metadata', e)
end

#host ⇒ Object

:nodoc:



41
42
43
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 41

def host # :nodoc:
  @host_header || uri.host
end

#name ⇒ Object

:nodoc:



37
38
39
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 37

def name # :nodoc:
  @name ||= "External/#{host}/#{library}/#{procedure}"
end

#process_response_headers(response) ⇒ Object

:nodoc:



185
186
187
188
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 185

def process_response_headers(response) # :nodoc:
  set_http_status_code(response)
  read_response_headers(response)
end

#process_response_metadata(response_metadata) ⇒ Object

Process obfuscated String sent from a called application that is also running a New Relic agent and save information in current transaction for inclusion in a trace. This String is generated by get_response_metadata on the receiving application.

Parameters:

  • response_metadata (String) —

    received obfuscated response metadata



160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 160

def process_response_metadata(response_metadata)
  NewRelic::Agent.record_api_supportability_metric(:process_response_metadata)
  if transaction
    app_data = ::JSON.parse(obfuscator.deobfuscate(response_metadata))[APP_DATA_KEY]

    # validate cross app id
    #
    if Array === app_data and CrossAppTracing.trusted_valid_cross_app_id?(app_data[0])
      @app_data = app_data
      update_segment_name
    else
      NewRelic::Agent.logger.error('error processing response metadata: invalid/non-trusted ID')
    end
  end

  nil
rescue => e
  NewRelic::Agent.logger.error('error during process_response_metadata', e)
end

#read_response_headers(response) ⇒ Object

This method extracts app data from an external response if present. If a valid cross-app ID is found, the name of the segment is updated to reflect the cross-process ID and transaction name.

Parameters:

  • response (Hash) —

    a hash of response headers



74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 74

def read_response_headers(response)
  return unless record_metrics? && CrossAppTracing.cross_app_enabled?
  return unless CrossAppTracing.response_has_crossapp_header?(response)

  unless data = CrossAppTracing.extract_appdata(response)
    NewRelic::Agent.logger.debug("Couldn't extract_appdata from external segment response")
    return
  end

  if CrossAppTracing.valid_cross_app_id?(data[0])
    @app_data = data
    update_segment_name
  else
    NewRelic::Agent.logger.debug('External segment response has invalid cross_app_id')
  end
rescue => e
  NewRelic::Agent.logger.error('Error in read_response_headers', e)
end

#record_metrics ⇒ Object 



180
181
182
183
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 180

def record_metrics
  add_unscoped_metrics
  super
end

#transaction_guid ⇒ Object

:nodoc:



101
102
103
 
# File 'lib/new_relic/agent/transaction/external_request_segment.rb', line 101

def transaction_guid # :nodoc:
  @app_data && @app_data[5]
end