Module: NewRelic::Agent::StatsEngine::Transactions

Included in:
NewRelic::Agent::StatsEngine
Defined in:
lib/new_relic/agent/stats_engine/transactions.rb

Defined Under Namespace

Modules: Shim

Instance Method Summary collapse

Instance Method Details

#end_transaction ⇒ Object

Try to clean up gracefully, otherwise we leave things hanging around on thread locals. If it looks like a transaction is still in progress, then maybe this is an inner transaction and is ignored.



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 109

def end_transaction
  stack = scope_stack
  
  if stack && stack.empty?
    Thread::current[:newrelic_scope_stack] = nil
    Thread::current[:newrelic_scope_name] = nil
  end
end

#peek_scope ⇒ Object 



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 79

def peek_scope
  scope_stack.last
end

#pop_scope(expected_scope, duration, time = Time.now.to_f) ⇒ Object 



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 58

def pop_scope(expected_scope, duration, time=Time.now.to_f)
  capture_gc_time if collecting_gc?
  stack = scope_stack
  scope = stack.pop
  fail "unbalanced pop from blame stack, got #{scope ? scope.name : 'nil'}, expected #{expected_scope ? expected_scope.name : 'nil'}" if scope != expected_scope
  
  if !stack.empty? 
    if scope.deduct_call_time_from_parent
      stack.last.children_time += duration
    else
      stack.last.children_time += scope.children_time
    end
  end
  
  if @transaction_sampler
    @transaction_sampler.notice_pop_scope(scope.name, time)
    @transaction_sampler.notice_scope_empty(time) if stack.empty? 
  end
  scope
end

#push_scope(metric, time = Time.now.to_f, deduct_call_time_from_parent = true) ⇒ Object 



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 37

def push_scope(metric, time = Time.now.to_f, deduct_call_time_from_parent = true)
  
  stack = scope_stack
  if collecting_gc?
    if stack.empty?
      # reset the gc time so we only include gc time spent during this call
      @last_gc_timestamp = GC.time
      @last_gc_count = GC.collections
    else
      capture_gc_time
    end
  end
  if @transaction_sampler
    @transaction_sampler.notice_first_scope_push(time) if stack.empty? 
    @transaction_sampler.notice_push_scope metric, time
  end
  scope = ScopeStackElement.new(metric, deduct_call_time_from_parent)
  stack.push scope
  scope
end

#remove_transaction_sampler(l) ⇒ Object 



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 33

def remove_transaction_sampler(l)
  @transaction_sampler = nil
end

#scope_name ⇒ Object 



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 95

def scope_name
  Thread::current[:newrelic_scope_name]
end

#scope_name=(transaction) ⇒ Object

set the name of the transaction for the current thread, which will be used to define the scope of all traced methods called on this thread until the scope stack is empty.

currently the transaction name is the name of the controller action that is invoked via the dispatcher, but conceivably we could use other transaction names in the future if the traced application does more than service http request via controller actions



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 91

def scope_name=(transaction)
  Thread::current[:newrelic_scope_name] = transaction
end

#start_transaction(name = nil) ⇒ Object

Start a new transaction, unless one is already in progress



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 100

def start_transaction(name = nil)
  Thread::current[:newrelic_scope_stack] ||= []
  self.scope_name = name if name
end

#transaction_sampler=(sampler) ⇒ Object 



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# File 'lib/new_relic/agent/stats_engine/transactions.rb', line 28

def transaction_sampler= sampler
  fail "Can't add a scope listener midflight in a transaction" if scope_stack.any?
  @transaction_sampler = sampler
end