You are viewing a plain text version of this content. The canonical link for it is here.
Posted to java-dev@axis.apache.org by Mustafa Shabib <mu...@rawthrills.com> on 2005/06/24 16:30:22 UTC
Newbie Memory Confusion!
Hello,
I'm having problems trying to return my own user defined types and I
believe it to be due to confusion on my part regarding how memory is
maintained between client/service. I'll be glad to send the entire WSDL
though I only provided the key parts for now, to simplify, since this
message is already really long.
This is how I define my type:
<wsdl:types>
<xsd:schema targetNamespace="http://localhost/axis/TournamentHelper"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:complexType name="compressionOutput">
<xsd:sequence>
<xsd:element name="compressedLen" type="xsd:unsignedInt"
nillable="false"/>
<xsd:element name="compressedText" type="xsd:string" nillable="true"/>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
</wsdl:types>
And how I use it:
<wsdl:message name="compressRequest">
<wsdl:part name="uncompressedText" type="xsd:string"/>
<wsdl:part name="uncompressedSize" type="xsd:unsignedInt"/>
</wsdl:message>
<wsdl:message name="compressResponse">
<wsdl:part name="compressedObj" type="intf:compressionOutput"/>
</wsdl:message>
And my port type operation is defined like so:
<wsdl:operation name="compress" parameterOrder="uncompressedText
uncompressedSize">
<wsdl:input message="intf:compressRequest" name="compressRequest"/>
<wsdl:output message="intf:compressResponse"
name="compressResponse"/>
</wsdl:operation>
and the binding operation like:
<wsdl:operation name="compress">
<wsdlsoap:operation soapAction="TournamentHelper#compress"/>
<wsdl:input name="compressRequest">
<wsdlsoap:body
encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
namespace="http://localhost/axis/TournamentHelper"
use="encoded"/>
</wsdl:input>
<wsdl:output name="compressResponse">
<wsdlsoap:body
encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
namespace="http://localhost/axis/TournamentHelper"
use="encoded"/>
</wsdl:output>
</wsdl:operation>
First, my user type generates the following object via the wsdl2ws.jar
utility:
#include <axis/AxisUserAPI.hpp>
AXIS_CPP_NAMESPACE_USE
/*Local name and the URI for the type*/
static const char* Axis_URI_compressionOutput =
"http://localhost/axis/TournamentHelper";
static const char* Axis_TypeName_compressionOutput = "compressionOutput";
class compressionOutput
{
public:
xsd__unsignedInt compressedLen;
xsd__string compressedText;
compressionOutput();
virtual ~compressionOutput();
};
Then, an operation that can be performed by my webservice returns a
pointer to an object of this type. Once generated, I fill in the
operation with some simple code:
compressionOutput* TournamentHelper::compress(xsd__string Value0,
xsd__unsignedInt Value1)
{
compressionOutput* retVal =
compressionOutput*)malloc(sizeof(compressionOutput));
retVal->compressedText = NULL;
retVal->compressedLen = Value1;
return retVal;
}
When I try to call this operation from a client, the program crashes
with the following message (edited for clarity)
Debug assertion failed!
...
File: dbgheap.c
Line: 1011
Expression: _CrtIsValidHeapPointer(pUserData)
...
When I call it from my client, I just do:
TournamentHelper t;
t.compress("TEST", 10);
I'm really confused and would love to hear any pointers. Thanks, and
apologies if I've sent this to the wrong person. Is there a newsgroup or
something I can post to?
Thanks again.
Mustafa
Re: Newbie Memory Confusion!
Posted by Anne Thomas Manes <at...@gmail.com>.
Mustafa,
You should ask this question on the Axis C++ User list. See
http://ws.apache.org/axis/mail.html for information about the various
Axis mailing lists.
To put it simply, no memory is maintained across client and server.
SOAP is a message passing system, not a distributed object system.
Don't think of it like an RPC. I also suggest that you switch to
document/literal mode. It enables much better interoperability.
Anne
On 6/24/05, Mustafa Shabib <mu...@rawthrills.com> wrote:
> Hello,
>
> I'm having problems trying to return my own user defined types and I
> believe it to be due to confusion on my part regarding how memory is
> maintained between client/service. I'll be glad to send the entire WSDL
> though I only provided the key parts for now, to simplify, since this
> message is already really long.
>
> This is how I define my type:
>
> <wsdl:types>
> <xsd:schema targetNamespace="http://localhost/axis/TournamentHelper"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema">
> <xsd:complexType name="compressionOutput">
> <xsd:sequence>
> <xsd:element name="compressedLen" type="xsd:unsignedInt"
> nillable="false"/>
> <xsd:element name="compressedText" type="xsd:string" nillable="true"/>
> </xsd:sequence>
> </xsd:complexType>
> </xsd:schema>
> </wsdl:types>
>
> And how I use it:
> <wsdl:message name="compressRequest">
> <wsdl:part name="uncompressedText" type="xsd:string"/>
> <wsdl:part name="uncompressedSize" type="xsd:unsignedInt"/>
> </wsdl:message>
> <wsdl:message name="compressResponse">
> <wsdl:part name="compressedObj" type="intf:compressionOutput"/>
> </wsdl:message>
>
> And my port type operation is defined like so:
> <wsdl:operation name="compress" parameterOrder="uncompressedText
> uncompressedSize">
> <wsdl:input message="intf:compressRequest" name="compressRequest"/>
> <wsdl:output message="intf:compressResponse"
> name="compressResponse"/>
> </wsdl:operation>
>
> and the binding operation like:
>
> <wsdl:operation name="compress">
> <wsdlsoap:operation soapAction="TournamentHelper#compress"/>
> <wsdl:input name="compressRequest">
> <wsdlsoap:body
> encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
> namespace="http://localhost/axis/TournamentHelper"
> use="encoded"/>
> </wsdl:input>
> <wsdl:output name="compressResponse">
> <wsdlsoap:body
> encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
> namespace="http://localhost/axis/TournamentHelper"
> use="encoded"/>
> </wsdl:output>
> </wsdl:operation>
> First, my user type generates the following object via the wsdl2ws.jar
> utility:
>
>
> #include <axis/AxisUserAPI.hpp>
> AXIS_CPP_NAMESPACE_USE
>
> /*Local name and the URI for the type*/
> static const char* Axis_URI_compressionOutput =
> "http://localhost/axis/TournamentHelper";
> static const char* Axis_TypeName_compressionOutput = "compressionOutput";
>
> class compressionOutput
> {
> public:
> xsd__unsignedInt compressedLen;
> xsd__string compressedText;
> compressionOutput();
> virtual ~compressionOutput();
> };
>
> Then, an operation that can be performed by my webservice returns a
> pointer to an object of this type. Once generated, I fill in the
> operation with some simple code:
>
> compressionOutput* TournamentHelper::compress(xsd__string Value0,
> xsd__unsignedInt Value1)
> {
> compressionOutput* retVal =
> compressionOutput*)malloc(sizeof(compressionOutput));
> retVal->compressedText = NULL;
> retVal->compressedLen = Value1;
> return retVal;
> }
>
> When I try to call this operation from a client, the program crashes
> with the following message (edited for clarity)
>
> Debug assertion failed!
> ...
> File: dbgheap.c
> Line: 1011
> Expression: _CrtIsValidHeapPointer(pUserData)
>
> ...
>
> When I call it from my client, I just do:
>
> TournamentHelper t;
> t.compress("TEST", 10);
>
> I'm really confused and would love to hear any pointers. Thanks, and
> apologies if I've sent this to the wrong person. Is there a newsgroup or
> something I can post to?
>
> Thanks again.
> Mustafa
>
>