class NewRelic::Agent::AgentLogger
Public Class Methods
new(root = "", override_logger=nil)
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# File lib/new_relic/agent/agent_logger.rb, line 14 def initialize(root = "", override_logger=nil) @already_logged_lock = Mutex.new clear_already_logged create_log(root, override_logger) set_log_level! set_log_format! gather_startup_logs end
Public Instance Methods
debug(*msgs, &blk)
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# File lib/new_relic/agent/agent_logger.rb, line 40 def debug(*msgs, &blk) format_and_send(:debug, msgs, &blk) end
error(*msgs, &blk)
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# File lib/new_relic/agent/agent_logger.rb, line 28 def error(*msgs, &blk) format_and_send(:error, msgs, &blk) end
fatal(*msgs, &blk)
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# File lib/new_relic/agent/agent_logger.rb, line 24 def fatal(*msgs, &blk) format_and_send(:fatal, msgs, &blk) end
info(*msgs, &blk)
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# File lib/new_relic/agent/agent_logger.rb, line 36 def info(*msgs, &blk) format_and_send(:info, msgs, &blk) end
is_startup_logger?()
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# File lib/new_relic/agent/agent_logger.rb, line 44 def is_startup_logger? @log.is_a?(NullLogger) end
log_exception(level, e, backtrace_level=level)
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Use this when you want to log an exception with explicit control over the log level that the backtrace is logged at. If you just want the default behavior of backtraces logged at debug, use one of the methods above and pass an Exception as one of the args.
# File lib/new_relic/agent/agent_logger.rb, line 52 def log_exception(level, e, backtrace_level=level) @log.send(level, "%p: %s" % [ e.class, e.message ]) @log.send(backtrace_level) do backtrace = backtrace_from_exception(e) if backtrace "Debugging backtrace:\n" + backtrace.join("\n ") else "No backtrace available." end end end
log_formatter=(formatter)
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# File lib/new_relic/agent/agent_logger.rb, line 64 def log_formatter=(formatter) @log.formatter = formatter end
warn(*msgs, &blk)
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# File lib/new_relic/agent/agent_logger.rb, line 32 def warn(*msgs, &blk) format_and_send(:warn, msgs, &blk) end
Private Instance Methods
backtrace_from_exception(e)
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# File lib/new_relic/agent/agent_logger.rb, line 70 def backtrace_from_exception(e) # We've seen that often the backtrace on a SystemStackError is bunk # so massage the caller instead at a known depth. # # Tests keep us honest about minmum method depth our log calls add. return caller.drop(5) if e.is_a?(SystemStackError) e.backtrace end
create_log(root, override_logger)
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# File lib/new_relic/agent/agent_logger.rb, line 99 def create_log(root, override_logger) if !override_logger.nil? @log = override_logger elsif ::NewRelic::Agent.config[:agent_enabled] == false create_null_logger else if wants_stdout? @log = ::Logger.new(STDOUT) else create_log_to_file(root) end end end
create_log_to_file(root)
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# File lib/new_relic/agent/agent_logger.rb, line 113 def create_log_to_file(root) path = find_or_create_file_path(::NewRelic::Agent.config[:log_file_path], root) if path.nil? @log = ::Logger.new(STDOUT) warn("Error creating log directory #{::NewRelic::Agent.config[:log_file_path]}, using standard out for logging.") else file_path = "#{path}/#{::NewRelic::Agent.config[:log_file_name]}" begin @log = ::Logger.new(file_path) rescue => e @log = ::Logger.new(STDOUT) warn("Failed creating logger for file #{file_path}, using standard out for logging.", e) end end end
create_null_logger()
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# File lib/new_relic/agent/agent_logger.rb, line 129 def create_null_logger @log = ::NewRelic::Agent::NullLogger.new end
find_or_create_file_path(path_setting, root)
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# File lib/new_relic/agent/agent_logger.rb, line 137 def find_or_create_file_path(path_setting, root) for abs_path in [ File.expand_path(path_setting), File.expand_path(File.join(root, path_setting)) ] do if File.directory?(abs_path) || (Dir.mkdir(abs_path) rescue nil) return abs_path[%r{^(.*?)/?$}] end end
format_and_send(level, *msgs, &block)
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Allows for passing exceptions in explicitly, which format with backtrace
# File lib/new_relic/agent/agent_logger.rb, line 81 def format_and_send(level, *msgs, &block) if block if @log.send("#{level}?") msgs = Array(block.call) else msgs = [] end end msgs.flatten.each do |item| case item when Exception then log_exception(level, item, :debug) else @log.send(level, item) end end nil end
wants_stdout?()
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# File lib/new_relic/agent/agent_logger.rb, line 133 def wants_stdout? ::NewRelic::Agent.config[:log_file_path].upcase == "STDOUT" end