Automatically Logging Exceptions in Ruby

Is there a library or easy way to catch exceptions thrown in a Ruby program and log it to a file? I've looked over log4r and logger, but the docs on both don't provide any examples on how I would do this. I run this program remotely and lose handles to stdout and stderr, if that information helps at all.

What would you recommend?

---

If you want to take a walk on the wild side, try this:

class Exception
  alias real_init initialize
  def initialize(*args)
    real_init *args
    # log the error (self) or its args here
  end
end

This will intercept the creation of new exception objects at the moment of creation.

---

Rescue from Exception . Something like this probably makes sense:

begin
  # run your code here ..
rescue Exception => exception
  # logger.error(...) ....
  raise exception
end

This will log the exception, and re-raise it so that the application actually raises an error in addition to the logging.

exception is an instance of Exception , take a look at the docs for information about what you can do with this object (such as accessing the backtrace).

---

如果您正在运行Rails应用程序，那么Exception Notification插件非常方便。

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