Class: NewRelic::Agent::InfiniteTracing::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/infinite_tracing/connection.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.instance ⇒ Object 



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# File 'lib/infinite_tracing/connection.rb', line 35

def instance
  @@instance ||= new
end

.metadata ⇒ Object 



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# File 'lib/infinite_tracing/connection.rb', line 57

def metadata
  instance.metadata
end

.record_span_batches(client, enumerator, exponential_backoff) ⇒ Object

RPC calls will pass the calling client instance in. We track this so we're able to signal the client to restart when connectivity to the server is disrupted.



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# File 'lib/infinite_tracing/connection.rb', line 53

def record_span_batches(client, enumerator, exponential_backoff)
  instance.record_span_batches(client, enumerator, exponential_backoff)
end

.record_spans(client, enumerator, exponential_backoff) ⇒ Object

RPC calls will pass the calling client instance in. We track this so we're able to signal the client to restart when connectivity to the server is disrupted.



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# File 'lib/infinite_tracing/connection.rb', line 46

def record_spans(client, enumerator, exponential_backoff)
  instance.record_spans(client, enumerator, exponential_backoff)
end

.reset ⇒ Object 



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# File 'lib/infinite_tracing/connection.rb', line 39

def reset
  @@instance = new
end

Instance Method Details

#metadata ⇒ Object

The metadata for the RPC calls is a blocking call waiting for the Agent to connect and receive the server side configuration, which contains the license_key as well as the agent_id (agent_run_token).



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# File 'lib/infinite_tracing/connection.rb', line 94

def metadata
  return @metadata if @metadata

  @lock.synchronize do
    @metadata = {
      "license_key" => license_key,
      "agent_run_token" => agent_id
    }
    @metadata.merge!(request_headers_map)
  end
end

#notify_agent_started ⇒ Object

Initializes rpc so we can get a Channel and Stub (connect to gRPC server) Initializes metadata so we use newest values in establishing channel Sets the agent_connected flag and signals the agent started so any waiting locks (rpc calls ahead of the agent connecting) can proceed.



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# File 'lib/infinite_tracing/connection.rb', line 110

def notify_agent_started
  @lock.synchronize do
    @rpc = nil
    @metadata = nil
    @agent_connected = true
    @agent_started.signal
  end
end

#record_span_batches(client, enumerator, exponential_backoff) ⇒ Object

RPC calls will pass the calling client instance in. We track this so we're able to signal the client to restart when connectivity to the server is disrupted.



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# File 'lib/infinite_tracing/connection.rb', line 72

def record_span_batches(client, enumerator, exponential_backoff)
  @active_clients[client] = client
  with_reconnection_backoff(exponential_backoff) { rpc.record_span_batch(enumerator, metadata: metadata) }
end

#record_spans(client, enumerator, exponential_backoff) ⇒ Object

We attempt to connect and record spans with reconnection backoff in order to deal with unavailable errors coming from the stub being created and record_span call



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# File 'lib/infinite_tracing/connection.rb', line 64

def record_spans(client, enumerator, exponential_backoff)
  @active_clients[client] = client
  with_reconnection_backoff(exponential_backoff) { rpc.record_span(enumerator, metadata: metadata) }
end

#rpc ⇒ Object

Acquires the new channel stub for the RPC calls. We attempt to connect and record spans with reconnection backoff in order to deal with unavailable errors coming from the stub being created and record_span call



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# File 'lib/infinite_tracing/connection.rb', line 80

def rpc
  wait_for_agent_connect
  @rpc ||= Channel.new.stub
end

#wait_for_agent_connect ⇒ Object 



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# File 'lib/infinite_tracing/connection.rb', line 85

def wait_for_agent_connect
  @lock.synchronize do
    @agent_started.wait(@lock) if !@agent_connected
  end
end