我正在包装大量的C函数,如果底层套接字连接丢失,可能引发异常.虽然我已经想出如何包装我的“获取连接”功能来重新建立连接和/或尝试列表中的其他可用服务器,但我无法找到一个解决方案来创建一个try..except包装器来提供给80 C功能.
#-- client.pxd --- cdef extern from "rpc/RpcService.h": cdef cppclass RpcServiceClient: void getProject(ProjectT&,Guid& id) nogil except + cdef extern from "client.h": cdef cppclass Client: RpcServiceClient proxy() nogil cdef Client* getClient() nogil except + #-- module.pxd --- cdef inline Client* conn() except *: # wrap getClient() here with try..except if the # connection was never established cpdef inline get_project(Guid& guid): cdef: ProjectT projT # cpp object Project project # cdef python class # this would catch fine in my conn() wrapper # if the connection had never been established # the first time. But if the existing connection # suddenly drops,it will be getProject() that # raises the exception conn().proxy().getProject(projT,guid) project = initProject(projT) return project
关于如何将所有这些C函数包装成try_call()之类的任何提示?
如果这是纯python,我可以简单地做这样的事情:
def try_call(fn,*args,**kwargs): # try fn(*args,**kwargs) and handle try_call(conn().proxy().getProject,projT,guid)
但显然我不能将这些cython函数作为python对象传递(或者我可以吗?).
或者C中的这样的事情:
TRY_CALL_OR_RECONNECT conn().proxy().getProject(projT,guid) END_TRY_CALL_OR_RECONNECT
解决方法
你可能想看看装饰员
def try_wrapper(x): try: x() except: doSomethingElse() @try_wrapper def defYouWantToWrap(): doSomething()
这可能不是最好的教程,但希望它可以指出你正确的方向