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Date: Thu, 29 Dec 2011 20:10:04 -0300
From: Ariel Constenla-Haile <arielch@apache.org>
To: ooo-users@incubator.apache.org
Cc: Jasankumar Changela <jasankumar_changela@persistent.co.in>
Subject: Re: How to enable the processing of one way calls in asynchronous
 manner in Apache OpenOffice 3.4?
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Hi Kandarpa,

On Thu, Dec 29, 2011 at 05:24:15AM +0000, Kandarpa Malipeddi wrote:
> Hi,
>=20
> Thank you very much for your inputs.
>=20
> In our use case we are not using
> soffice -accept=3D"uno:socket,host=3D127.0.0.1,port=3D8100,tcpNoDelay=3D1=
;urp,Negotiate=3D0,ForceSynchronous=3D0;TheComponentContext"
> Following is the description of our use case in c++ code:
>=20
> 1. We have Reference<XComponentContext> localContext
> 2. From this localContext we are retrieving the Reference < XMultiCompone=
ntFactory > as follow:
>     Reference < XMultiComponentFactory > localServiceManager =3D localCon=
text->getServiceManager();
> 3. From this localServiceManager we are retriving "com.sun.star.bridge.Un=
oUrlResolver" service as follow:
>     Reference < XInterface > urlResolverXInterface =3D localServiceManage=
r->createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", localCon=
text);
> 4. From urlResolverXInterface we are retriving the Reference < XUnoUrlRes=
olver > as follow:
>     Reference < XUnoUrlResolver >urlResolver(urlResolverXInterface, UNO_Q=
UERY );
> 5. Invocation of urlResolver->resolve("uno:socket,host=3D127.0.0.1,port=
=3D9999,tcpNoDelay=3D1;urp,Negotiate=3D0,ForceSynchronous=3D0;TheComponentC=
ontext"); method results in crash.
>=20
> We ensured that all References in the above sequence of steps are valid. =
However invocation of
> urlResolver->resolve("uno:socket,host=3D127.0.0.1,port=3D9999,tcpNoDelay=
=3D1;urp,Negotiate=3D0,ForceSynchronous=3D0;TheComponentContext"); method r=
esults in crash.
>=20
> We debugged the code and found following:
> During the invocation of "urlResolver->resolve" method control reaches to=
 "ooo/main/binaryurp/source/bridgefactory.cxx" file of binaryurp code and i=
n "BridgeFactory::createBridge(...)" method of "bridgefactory.cxx" file fol=
lowing condition check on line 145 throws exception which causes crash.
>=20
> Snippet of "ooo/main/binaryurp/source/bridgefactory.cxx" file from line 1=
45 to 154
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>         if (!(sProtocol.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("urp")) &&
>               aConnection.is()))
>         {
>             throw css::lang::IllegalArgumentException(
>                 rtl::OUString(
>                     RTL_CONSTASCII_USTRINGPARAM(
>                         "BridgeFactory::createBridge: sProtocol !=3D urp =
||"
>                         " aConnection =3D=3D null")),
>                 static_cast< cppu::OWeakObject * >(this), -1);
>         }
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> We hope the above explanation would be helpful to understand the cause of=
 crash in our use case.

an exception only causes a crash if there is no code that catches it.
You should catch the exceptions AOO API interface methods are allowed to
throw.
I guess your urlResolver->resolve() is not surrounded with a try-catch,
and com::sun::star::bridge::XUnoUrlResolver::resolve can trhow three
kind of exceptions, among those
a com::sun::star::lang::IllegalArgumentException.
So the underlying problem is not the crash.

Back to the root cause, aConnection.is() evaluates to false; that is,
there is no connection; for some reason, a connection cannot be
established with the office listening to a socket on the given port.

Something maybe obvious, but did you start the office with an
-accept=3D... argument (matching the one you use in
XUnoUrlResolver::resolve)?=20
Did you check the office is listening on the specified port?


Regards
--=20
Ariel Constenla-Haile
La Plata, Argentina

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