Class: NewRelic::Agent::TransactionSampleBuilder

Inherits:
Object
  • Object
show all
Includes:
CollectionHelper
Defined in:
lib/new_relic/agent/transaction_sampler.rb

Overview

a builder is created with every sampled transaction, to dynamically generate the sampled data. It is a thread-local object, and is not accessed by any other thread so no need for synchronization.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from CollectionHelper

#normalize_params, #strip_nr_from_backtrace

Constructor Details

#initialize(time = Time.now.to_f) ⇒ TransactionSampleBuilder

Returns a new instance of TransactionSampleBuilder.



225
226
227
228
229
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 225

def initialize(time=Time.now.to_f)
  @sample = NewRelic::TransactionSample.new(time)
  @sample_start = time
  @current_segment = @sample.root_segment
end

Instance Attribute Details

#current_segment ⇒ Object (readonly)

Returns the value of attribute current_segment.



221
222
223
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 221

def current_segment
  @current_segment
end

Instance Method Details

#finish_trace(time) ⇒ Object 



249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 249

def finish_trace(time)
  # This should never get called twice, but in a rare case that we can't reproduce in house it does.
  # log forensics and return gracefully
  if @sample.frozen?
    log = NewRelic::Control.instance.log
    
    log.warn "Unexpected double-freeze of Transaction Trace Object."
    log.info "Please send this diagnostic data to New Relic"
    log.info @sample.to_s
    return
  end
  @sample.root_segment.end_trace(time - @sample_start)
  @sample.params[:custom_params] = normalize_params(NewRelic::Agent.instance.custom_params)
  @sample.freeze
  @current_segment = nil
end

#freeze ⇒ Object 



278
279
280
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 278

def freeze
  @sample.freeze unless sample.frozen?
end

#sample ⇒ Object 



304
305
306
307
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 304

def sample
  fail "Not finished building" unless @sample.frozen?
  @sample
end

#sample_id ⇒ Object 



231
232
233
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 231

def sample_id
  @sample.sample_id
end

#scope_depth ⇒ Object 



266
267
268
269
270
271
272
273
274
275
276
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 266

def scope_depth
  depth = -1        # have to account for the root
  current = @current_segment
  
  while(current)
    depth += 1
    current = current.parent_segment
  end
  
  depth
end

#set_profile(profile) ⇒ Object 



282
283
284
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 282

def set_profile(profile)
  @sample.profile = profile
end

#set_transaction_cpu_time(cpu_time) ⇒ Object 



299
300
301
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 299

def set_transaction_cpu_time(cpu_time)
  @sample.params[:cpu_time] = cpu_time
end

#set_transaction_info(path, request, params) ⇒ Object 



286
287
288
289
290
291
292
293
294
295
296
297
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 286

def set_transaction_info(path, request, params)
  @sample.params[:path] = path
  
  if NewRelic::Control.instance.capture_params
    params = normalize_params params
    
    @sample.params[:request_params].merge!(params)
    @sample.params[:request_params].delete :controller
    @sample.params[:request_params].delete :action
  end
  @sample.params[:uri] = request.path if request
end

#trace_entry(metric_name, time) ⇒ Object 



235
236
237
238
239
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 235

def trace_entry(metric_name, time)
  segment = @sample.create_segment(time - @sample_start, metric_name)
  @current_segment.add_called_segment(segment)
  @current_segment = segment
end

#trace_exit(metric_name, time) ⇒ Object 



241
242
243
244
245
246
247
 
# File 'lib/new_relic/agent/transaction_sampler.rb', line 241

def trace_exit(metric_name, time)
  if metric_name != @current_segment.metric_name
    fail "unbalanced entry/exit: #{metric_name} != #{@current_segment.metric_name}"
  end
  @current_segment.end_trace(time - @sample_start)
  @current_segment = @current_segment.parent_segment
end