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From "Andrew Zhang" <zhanghuang...@gmail.com>
Subject Re: [jira] Commented: (HARMONY-815) [classlib][nio] Refine implConfigureBlocking(boolean) method of DatagramChannel and SocketChannel.
Date Thu, 13 Jul 2006 01:27:27 GMT
Hello Geir,

I also mention this solution as option.1.

But it has to be portable error code, which should be defined in portlib.

Thanks!


On 7/13/06, Geir Magnusson Jr <geir@pobox.com> wrote:
>
> I agree with the reason why (I think I understand it - you don't want to
> rely on the result of getMessage() to determine the problem...)
>
> Could you wrap the socket exception to carry a simple integer error code?


Do you mean only wrap for this specific exception with error code or all
SocketException thrown by native code?
Thanks!

geir
>
>
> Mikhail Loenko wrote:
> > -1 for applying the patch
> >
> > Applying this patch means creating a hidden problem
> >
> > Thanks,
> > Mikhail
> >
> > 2006/7/12, Jimmy, Jing Lv <firepure@gmail.com>:
> >> Andrew Zhang wrote:
> >> > Hello Mikhail,
> >> >
> >> > Please see my comments inline.
> >> >
> >> > Thanks!
> >> >
> >> >
> >> > On 7/12/06, Mikhail Loenko <mloenko@gmail.com> wrote:
> >> >>
> >> >> 2006/7/12, Andrew Zhang <zhanghuangzhu@gmail.com>:
> >> >> > Hi Mikhail,
> >> >> >
> >> >> > It's a NON-NLS message.
> >> >> >
> >> >> > Native code is designed in this way. Currently, Harmony socket
> >> native
> >> >> code
> >> >> > uses messages in SocketException to identify error type.
> >> >> >
> >> >> > To avoid the confusion, two alternatives way I could image are:
> >> >> >
> >> >> > 1. Native code returns platform-independent error code.
> >> >> >
> >> >> > 2. Native code throws different exceptions, which are all
> >> extended from
> >> >> > SocketException.
> >> >> >
> >> >> > Anyway, as current Harmony native design, the message in
> >> >> SocketException
> >> >> > thrown by native code is a NON-NLS string, that is to say, like
> >> >> "GET","POST"
> >> >> > in http protocol.  Unless we take a big change on native code
> >> design, I
> >> >> > don't think the code is dangerous.
> >> >> >
> >> >> > What's your opnion?
> >> >>
> >> >> I like option #2.
> >> >
> >> >
> >> > I also prefer option1 and 2 to current native solution.
> >> >
> >> > I don't think exception messages are the same as "GET" and "POST", we
> >> > agreed
> >> >> that the messages are to be internationalized. I see that currently
> >> not
> >> >> all
> >> >> the messages are internationalized but I think they will in the
> >> future.
> >> >
> >> >
> >> > NO. Currently, exception message thrown by native code are used as
> >> if error
> >> > code [1]. Please pay attention to netLookupErrorString function.
> >> >
> >> > Harmony-815 patch is based on current Harmony native implemenation,
> >> > therefore, it should work well if design is not changed.
> >> >
> >> > If we decide to adopt option 1, or 2, we have to re-design native
> >> and java
> >> > interface,
> >> >
> >> > and there are lots of native and java code to be changed.
> >> >
> >> > How to design native interface is out of scope to this patch,
> >> therefore, I
> >> > think a seperate JIRA or thread for socket native interface design
> >> is more
> >> > suitable.
> >> >
> >> > Of course, once decision is made, I'll volunteer to revise native
> >> and java
> >> > code.
> >> >
> >>
> >> Yep, I also find this strange style of return value, I doubt if the
> >> exception thrown in native may be an enhancement to code efficiency?
> >> However to refactor this may be a heavy work, as much code follows this
> >> style, affects both luni and nio. I suggest apply this patch, and leave
> >> this work until Harmony begins i18n.
> >>
> >> > Does it make sense?
> >> >
> >> > Thanks!
> >> >
> >> > [1] native-src (nethelp.c)
> >> >
> >> >
> >> > void
> >> > throwJavaNetSocketException (JNIEnv * env, I_32 errorNumber)
> >> > {
> >> >  jclass aClass;
> >> >  /* the error message lookup should be done before the FindClass
> call,
> >> > because the FindClass call
> >> >   * may reset the error number that is used in hysock_error_message
> */
> >> >
> >> > // !!! Here, error code is mapped to NON-NLS mesage.
> >> >  char *errorMessage = netLookupErrorString (env, errorNumber);
> >> >  aClass = (*env)->FindClass (env, "java/net/SocketException");
> >> >  if (0 == aClass)
> >> >    {
> >> >      return;
> >> >    }
> >> >  (*env)->ThrowNew (env, aClass, errorMessage);
> >> >
> >> > }
> >> >
> >> > char *
> >> > netLookupErrorString (JNIEnv * env, I_32 anErrorNum)
> >> > {
> >> >  PORT_ACCESS_FROM_ENV (env);
> >> >  switch (anErrorNum)
> >> >    {
> >> >    case HYPORT_ERROR_SOCKET_BADSOCKET:
> >> >      return "Bad socket";
> >> >    case HYPORT_ERROR_SOCKET_NOTINITIALIZED:
> >> >      return "Socket library uninitialized";
> >> >    case HYPORT_ERROR_SOCKET_BADAF:
> >> >      return "Bad address family";
> >> >    case HYPORT_ERROR_SOCKET_BADPROTO:
> >> >      return "Bad protocol";
> >> >    case HYPORT_ERROR_SOCKET_BADTYPE:
> >> >      return "Bad type";
> >> >    case HYPORT_ERROR_SOCKET_SYSTEMBUSY:
> >> >      return "System busy handling requests";
> >> >    case HYPORT_ERROR_SOCKET_SYSTEMFULL:
> >> >      return "Too many sockets allocated";
> >> >    case HYPORT_ERROR_SOCKET_NOTCONNECTED:
> >> >      return "Socket is not connected";
> >> >    case HYPORT_ERROR_SOCKET_INTERRUPTED:
> >> >      return "The call was cancelled";
> >> >    case HYPORT_ERROR_SOCKET_TIMEOUT:
> >> >      return "The operation timed out";
> >> >    case HYPORT_ERROR_SOCKET_CONNRESET:
> >> >      return "The connection was reset";
> >> >    case HYPORT_ERROR_SOCKET_WOULDBLOCK:
> >> >      return "The socket is marked as nonblocking operation would
> >> block";
> >> >    case HYPORT_ERROR_SOCKET_ADDRNOTAVAIL:
> >> >      return "The address is not available";
> >> >    case HYPORT_ERROR_SOCKET_ADDRINUSE:
> >> >      return "The address is already in use";
> >> >    case HYPORT_ERROR_SOCKET_NOTBOUND:
> >> >      return "The socket is not bound";
> >> >    case HYPORT_ERROR_SOCKET_UNKNOWNSOCKET:
> >> >      return "Resolution of the FileDescriptor to socket failed";
> >> >    case HYPORT_ERROR_SOCKET_INVALIDTIMEOUT:
> >> >      return "The specified timeout is invalid";
> >> >    case HYPORT_ERROR_SOCKET_FDSETFULL:
> >> >      return "Unable to create an FDSET";
> >> >    case HYPORT_ERROR_SOCKET_TIMEVALFULL:
> >> >      return "Unable to create a TIMEVAL";
> >> >    case HYPORT_ERROR_SOCKET_REMSOCKSHUTDOWN:
> >> >      return "The remote socket has shutdown gracefully";
> >> >    case HYPORT_ERROR_SOCKET_NOTLISTENING:
> >> >      return "Listen() was not invoked prior to accept()";
> >> >    case HYPORT_ERROR_SOCKET_NOTSTREAMSOCK:
> >> >      return "The socket does not support connection-oriented
> service";
> >> >    case HYPORT_ERROR_SOCKET_ALREADYBOUND:
> >> >      return "The socket is already bound to an address";
> >> >    case HYPORT_ERROR_SOCKET_NBWITHLINGER:
> >> >      return "The socket is marked non-blocking & SO_LINGER is
> >> non-zero";
> >> >    case HYPORT_ERROR_SOCKET_ISCONNECTED:
> >> >      return "The socket is already connected";
> >> >    case HYPORT_ERROR_SOCKET_NOBUFFERS:
> >> >      return "No buffer space is available";
> >> >    case HYPORT_ERROR_SOCKET_HOSTNOTFOUND:
> >> >      return "Authoritative Answer Host not found";
> >> >    case HYPORT_ERROR_SOCKET_NODATA:
> >> >      return "Valid name, no data record of requested type";
> >> >    case HYPORT_ERROR_SOCKET_BOUNDORCONN:
> >> >      return "The socket has not been bound or is already connected";
> >> >    case HYPORT_ERROR_SOCKET_OPNOTSUPP:
> >> >      return "The socket does not support the operation";
> >> >    case HYPORT_ERROR_SOCKET_OPTUNSUPP:
> >> >      return "The socket option is not supported";
> >> >    case HYPORT_ERROR_SOCKET_OPTARGSINVALID:
> >> >      return "The socket option arguments are invalid";
> >> >    case HYPORT_ERROR_SOCKET_SOCKLEVELINVALID:
> >> >      return "The socket level is invalid";
> >> >    case HYPORT_ERROR_SOCKET_TIMEOUTFAILURE:
> >> >      return "The timeout operation failed";
> >> >    case HYPORT_ERROR_SOCKET_SOCKADDRALLOCFAIL:
> >> >      return "Failed to allocate address structure";
> >> >    case HYPORT_ERROR_SOCKET_FDSET_SIZEBAD:
> >> >      return "The calculated maximum size of the file descriptor set
> is
> >> > bad";
> >> >    case HYPORT_ERROR_SOCKET_UNKNOWNFLAG:
> >> >      return "The flag is unknown";
> >> >    case HYPORT_ERROR_SOCKET_MSGSIZE:
> >> >      return
> >> >  "The datagram was too big to fit the specified buffer, so
> truncated";
> >> >    case HYPORT_ERROR_SOCKET_NORECOVERY:
> >> >      return "The operation failed with no recovery possible";
> >> >    case HYPORT_ERROR_SOCKET_ARGSINVALID:
> >> >      return "The arguments are invalid";
> >> >    case HYPORT_ERROR_SOCKET_BADDESC:
> >> >      return "The socket argument is not a valid file descriptor";
> >> >    case HYPORT_ERROR_SOCKET_NOTSOCK:
> >> >      return "The socket argument is not a socket";
> >> >    case HYPORT_ERROR_SOCKET_HOSTENTALLOCFAIL:
> >> >      return "Unable to allocate the hostent structure";
> >> >    case HYPORT_ERROR_SOCKET_TIMEVALALLOCFAIL:
> >> >      return "Unable to allocate the timeval structure";
> >> >    case HYPORT_ERROR_SOCKET_LINGERALLOCFAIL:
> >> >      return "Unable to allocate the linger structure";
> >> >    case HYPORT_ERROR_SOCKET_IPMREQALLOCFAIL:
> >> >      return "Unable to allocate the ipmreq structure";
> >> >    case HYPORT_ERROR_SOCKET_FDSETALLOCFAIL:
> >> >      return "Unable to allocate the fdset structure";
> >> >    case HYPORT_ERROR_SOCKET_CONNECTION_REFUSED:
> >> >      return "Connection refused";
> >> >
> >> >    default:
> >> >      return (char *) hysock_error_message ();
> >> >    }
> >> > }
> >> >
> >> >
> >> > Thanks,
> >> >> Mikhail
> >> >>
> >> >>
> >> >> >
> >> >> > Best regards,
> >> >> > Andrew
> >> >> >
> >> >> >
> >> >> > On 7/11/06, Mikhail Loenko (JIRA) <jira@apache.org> wrote:
> >> >> > >
> >> >> > >    [
> >> >> > >
> >> >>
> >>
> http://issues.apache.org/jira/browse/HARMONY-815?page=comments#action_12420281
> >>
> >> >>
> >> >> ]
> >> >> > >
> >> >> > > Mikhail Loenko commented on HARMONY-815:
> >> >> > > ----------------------------------------
> >> >> > >
> >> >> > > Hi Andrew
> >> >> > >
> >> >> > > I think it's rather dangerous:
> >> >> > >
> >> >> > >        }  catch (SocketException e) {
> >> >> > >            if (ERRMSG_NONBLOKING_OUT.equals(e.getMessage()))
{
> >> >> > >                return sendCount;
> >> >> > >            }
> >> >> > >            throw e;
> >> >> > >
> >> >> > > Once we internationilize our code that won't work
> >> >> > >
> >> >> > > > [classlib][nio] Refine implConfigureBlocking(boolean)
method
> of
> >> >> > > DatagramChannel and SocketChannel.
> >> >> > > >
> >> >> > >
> >> >>
> >>
> --------------------------------------------------------------------------------------------------
> >>
> >> >>
> >> >> > > >
> >> >> > > >          Key: HARMONY-815
> >> >> > > >          URL: http://issues.apache.org/jira/browse/HARMONY-815
> >> >> > > >      Project: Harmony
> >> >> > > >         Type: Improvement
> >> >> > >
> >> >> > > >   Components: Classlib
> >> >> > > >     Reporter: Andrew Zhang
> >> >> > > >     Assignee: Mikhail Loenko
> >> >> > > >  Attachments: nio.diff
> >> >> > > >
> >> >> > > > Currently, Harmony
> >> DatagramChannel.implConfigureBlocking(boolean)
> >> >> does
> >> >> > > nothing.
> >> >> > > > It doesn't cause any problem of read operation because
> >> Harmony uses
> >> >> > > select+blocking read to ensure nonblocking reading.
> >> >> > > > But it affects write operations, although it is difficult
to
> >> test
> >> >> the
> >> >> > > difference between blocking write and blocking write.
> >> >> > > > Another defect is introduced by portlib bug. As discussed
on
> >> >> mailing
> >> >> > > list[1], connect_with_timeout always changes the fd to blocking
> >> mode
> >> >> after
> >> >> > > invocation.
> >> >> > > > I'll upload a patch to fix these problems.
> >> >> > > > Thanks!
> >> >> > > > Best regards,
> >> >> > > > Andrew
> >> >> > >
> >> >> > > --
> >> >> > > This message is automatically generated by JIRA.
> >> >> > > -
> >> >> > > If you think it was sent incorrectly contact one of the
> >> >> administrators:
> >> >> > >   http://issues.apache.org/jira/secure/Administrators.jspa
> >> >> > > -
> >> >> > > For more information on JIRA, see:
> >> >> > >   http://www.atlassian.com/software/jira
> >> >> > >
> >> >> > >
> >> >> >
> >> >> >
> >> >> > --
> >> >> > Andrew Zhang
> >> >> > China Software Development Lab, IBM
> >> >> >
> >> >> >
> >> >>
> >> >>
> ---------------------------------------------------------------------
> >> >> Terms of use : http://incubator.apache.org/harmony/mailing.html
> >> >> To unsubscribe, e-mail: harmony-dev-unsubscribe@incubator.apache.org
> >> >> For additional commands, e-mail:
> harmony-dev-help@incubator.apache.org
> >> >>
> >> >>
> >> >
> >> >
> >>
> >>
> >> --
> >>
> >> Best Regards!
> >>
> >> Jimmy, Jing Lv
> >> China Software Development Lab, IBM
> >>
> >> ---------------------------------------------------------------------
> >> Terms of use : http://incubator.apache.org/harmony/mailing.html
> >> To unsubscribe, e-mail: harmony-dev-unsubscribe@incubator.apache.org
> >> For additional commands, e-mail: harmony-dev-help@incubator.apache.org
> >>
> >>
> >
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> >
> >
> >
>
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>


-- 
Andrew Zhang
China Software Development Lab, IBM

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