class NewRelic::Agent::Commands::AgentCommandRouter
Constants
- ERROR_KEY
- SUCCESS_RESULT
Attributes
backtrace_service[RW]
handlers[R]
thread_profiler_session[RW]
Public Class Methods
new(event_listener = nil)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 22 def initialize(event_listener = nil) @handlers = Hash.new { |*| proc { |cmd| self.unrecognized_agent_command(cmd) } } @backtrace_service = Threading::BacktraceService.new(event_listener) @thread_profiler_session = ThreadProfilerSession.new(@backtrace_service) @handlers['start_profiler'] = proc { |cmd| thread_profiler_session.handle_start_command(cmd) } @handlers['stop_profiler'] = proc { |cmd| thread_profiler_session.handle_stop_command(cmd) } # the following statement needs else branch coverage if event_listener # rubocop:disable Style/SafeNavigation event_listener.subscribe(:before_shutdown, &method(:on_before_shutdown)) end end
Public Instance Methods
call_handler_for(agent_command)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 128 def call_handler_for(agent_command) handler = select_handler(agent_command) handler.call(agent_command) end
check_for_and_handle_agent_commands()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 42 def check_for_and_handle_agent_commands commands = get_agent_commands results = invoke_commands(commands) new_relic_service.agent_command_results(results) unless results.empty? end
error(err)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 124 def error(err) {ERROR_KEY => err.message} end
get_agent_commands()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 88 def get_agent_commands commands = new_relic_service.get_agent_commands NewRelic::Agent.logger.debug("Received get_agent_commands = #{commands.inspect}") commands.map { |collector_command| AgentCommand.new(collector_command) } end
harvest!()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 55 def harvest! profiles = [] profiles += harvest_from_thread_profiler_session log_profiles(profiles) profiles end
harvest_from_thread_profiler_session()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 70 def harvest_from_thread_profiler_session if self.thread_profiler_session.ready_to_harvest? self.thread_profiler_session.stop(true) [self.thread_profiler_session.harvest] else [] end end
invoke_command(agent_command)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 107 def invoke_command(agent_command) begin call_handler_for(agent_command) return success rescue AgentCommandError => e NewRelic::Agent.logger.debug(e) error(e) end end
invoke_commands(agent_commands)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 94 def invoke_commands(agent_commands) results = {} agent_commands.each do |agent_command| results[agent_command.id.to_s] = invoke_command(agent_command) end results end
log_profiles(profiles)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 79 def log_profiles(profiles) if profiles.empty? ::NewRelic::Agent.logger.debug('No thread profiles with data found to send.') else profile_descriptions = profiles.map { |p| p.to_log_description } ::NewRelic::Agent.logger.debug("Sending thread profiles [#{profile_descriptions.join(', ')}]") end end
merge!(*args)
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We don’t currently support merging thread profiles that failed to send back into the AgentCommandRouter
, so we just no-op this method. Same with reset! - we don’t support asynchronous cancellation of a running thread profile currently.
# File lib/new_relic/agent/commands/agent_command_router.rb, line 66 def merge!(*args); end
new_relic_service()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 38 def new_relic_service NewRelic::Agent.instance.service end
on_before_shutdown(*args)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 49 def on_before_shutdown(*args) if self.thread_profiler_session.running? self.thread_profiler_session.stop(true) end end
reset!()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 68 def reset!; end
select_handler(agent_command)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 133 def select_handler(agent_command) @handlers[agent_command.name] end
success()
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 120 def success SUCCESS_RESULT end
unrecognized_agent_command(agent_command)
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# File lib/new_relic/agent/commands/agent_command_router.rb, line 137 def unrecognized_agent_command(agent_command) NewRelic::Agent.logger.debug("Unrecognized agent command #{agent_command.inspect}") end