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Contents
module DaemonKit
# Provides a wrapper for running code inside a 'safety net' Any
# exceptions raised inside a safety net is handled and reported via
# loggers, email or Hoptoad.
#
# The safety net can be configured via DaemonKit.config.safety,
# which holds the only instance of the safety net.
class Safety
# Who get's notified.
@handler = nil
attr_accessor :handler
# Registered error handlers
@error_handlers = {}
attr_reader :error_handlers
class << self
# Singleton
@instance = nil
def instance
@instance ||= new
end
private :new
# Run the provided block inside a safety net.
def run(&block)
self.instance.run(&block)
end
def register_error_handler( klass )
name = klass.to_s.split('::').last.downcase
DaemonKit.logger.debug( "Registering error handler '#{name}' (#{klass})" ) if DaemonKit.logger
instance.instance_eval( <<-EOF, __FILE__, __LINE__ )
def #{name}
@#{name} ||= #{klass}.instance
end
EOF
end
end
# Run the provided block inside a safety net.
def run(&block)
begin
block.call
rescue => e
# Log
DaemonKit.logger.fatal "Safety net caught exception: #{e.message}"
DaemonKit.logger.fatal "Backtrace: #{e.backtrace.join("\n ")}"
get_handler.handle_exception( e ) if get_handler
end
end
def get_handler
if @handler && self.respond_to?( @handler )
h = send( @handler )
return h if h.class.ancestors.include?( DaemonKit::ErrorHandlers::Base )
end
return nil
end
end
end
class Object
class << self
def safely(&block)
DaemonKit::Safety.run(&block)
end
end
def safely(&block)
DaemonKit::Safety.run(&block)
end
end
# Load our error handlers
require 'daemon_kit/error_handlers/base'
require 'daemon_kit/error_handlers/hoptoad'
Version data entries
9 entries across 9 versions & 3 rubygems