使用decorator记录异常信息

common/TryExceptWrapper:

import inspect
import sys

class MyException(Exception):
    pass

def show_stack(stack):
    stack_len = len(stack)
    assert stack_len >= 2

    stack_info = ""
    for i in xrange(0, stack_len):
        caller_frame_record = stack[i]
        caller_frame = caller_frame_record[0]
        caller_info = inspect.getframeinfo(caller_frame)
        stack_info += "frame %d: file[%s], func[%s], line[%s]\n"%(i, caller_info.filename, caller_info.function, caller_info.lineno)
    
    LOG.error(stack_info)

def try_except(fn):
    """
        @try_except is adopted to record exceptions all the time
    """
    def wrapped(*args, **kwargs):
        try:
            return fn(*args, **kwargs)
        except Exception, e:
            et, ei, tb = sys.exc_info()
            LOG.error("%s\n%s"%(et, ei))
            
            #show stack frames from the caller
            stack = inspect.stack()
            show_stack(stack)

            raise MyException, MyException(e), tb
    return wrapped
    
使用：
from common.TryExceptWrapper import try_except

在任意def fun()方法上面加上
@try_except