是否有传播错误和警告细节的模式？

是否有传播错误和警告细节的通用模式？通过错误我的意思是严重的问题,应该引起的码流停止.通过警告我的意思是值得告知用户问题的问题,但是太过微不足以阻止程序流程.

我目前使用异常来处理硬错误,并使用Python日志记录框架来记录警告.但现在我想在当前正在处理的记录的数据库字段中记录警告.我想,我希望警告以与异常相同的方式冒泡,但不会停止程序流程.

>>> import logging
>>>
>>> def process_item(item):
...     if item:
...         if item == 'broken':
...             logging.warning('soft error, continue with next item')

...     else:
...         raise Exception('hard error, cannot continue')
...
>>> process_item('good')
>>> process_item(None)
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 6, in process_item
Exception: hard error, cannot continue
>>> process_item('broken')
WARNING:root:soft error, continue with next item

这个例子(和我当前的问题)是在Python中,但它也应该适用于其他语言也有例外.

按照David的建议和下面的例子简单介绍,Python的warnings模块是要走的路.

import warnings

class MyWarning(Warning):
    pass

def causes_warnings():
    print 'enter causes_warnings'
    warnings.warn("my warning", MyWarning)
    print 'leave causes_warnings'

def do_stuff():
    print 'enter do_stuff'
    causes_warnings()
    causes_warnings()
    causes_warnings()
    print 'leave do_stuff'

with warnings.catch_warnings(record=True) as w:
    # Cause all warnings to always be triggered.
    warnings.simplefilter("always")
    # Trigger a number of warnings.
    do_stuff()
    # Do something (not very) useful with the warnings generated
    print 'Warnings:',','.join([str(warning.message) for warning in w])

输出:

enter do_stuff
enter causes_warnings
leave causes_warnings
enter causes_warnings
leave causes_warnings
enter causes_warnings
leave causes_warnings
leave do_stuff
Warnings: my warning,my warning,my warning

注意:Python 2.6+是必需的catch_warnings.

查看Python的warnings模块,http://docs.python.org/library/warnings.html

我不认为在没有指定语言的情况下你可以对这个问题说多少,因为非终端错误处理因语言而异.