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Posted to log4cxx-user@logging.apache.org by Ashfaque <as...@ml.com> on 2007/12/03 06:33:12 UTC
log4cxx-0.10.0 - adding a custom appender
Hi,
I am trying to add a custom appender using version 0.10.0 of log4cxx. But I
am receiving the following linker errors. Can anyone help me out in
resolving these errors?
Error 25 error LNK2019: unresolved external symbol "__declspec(dllimport)
public: virtual bool __thiscall EMSAppender::instanceof(class
log4cxx::helpers::Class const &)const "
(__imp_?instanceof@EMSAppender@@UBE_NABVClass@helpers@log4cxx@@@Z)
referenced in function "[thunk]:public: virtual bool __thiscall
EMSAppender::instanceof`vtordisp{4294967292,0}' (class
log4cxx::helpers::Class const &)const "
(?instanceof@EMSAppender@@$4PPPPPPPM@A@BE_NABVClass@helpers@log4cxx@@@Z)
emsappender.obj
Error 26 error LNK2019: unresolved external symbol "__declspec(dllimport)
public: void __thiscall EMSAppender::`vbase destructor'(void)"
(__imp_??_DEMSAppender@@QAEXXZ) referenced in function "public: virtual void
* __thiscall EMSAppender::`scalar deleting destructor'(unsigned int)"
(??_GEMSAppender@@UAEPAXI@Z) emsappender.obj
Thanks,
Ashfaq
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Re: log4cxx-0.10.0 - adding a custom appender
Posted by Ashfaque <as...@ml.com>.
Yes, I am extending it from AppenderSkeleton. Following is the header file
that I am defining.
Please let me know if you see any issues with this.
Thanks,
Ashfaq
#include <log4cxx/appenderskeleton.h>
#include <log4cxx/helpers/class.h>
#include <tibems/tibems.h>
using namespace log4cxx;
using namespace log4cxx::helpers;
class EMSAppender;
typedef helpers::ObjectPtrT<EMSAppender> EMSAppenderPtr;
class LOG4CXX_EXPORT EMSAppender : public AppenderSkeleton
{
public:
DECLARE_LOG4CXX_OBJECT(EMSAppender)
BEGIN_LOG4CXX_CAST_MAP()
LOG4CXX_CAST_ENTRY(EMSAppender)
LOG4CXX_CAST_ENTRY_CHAIN(AppenderSkeleton)
END_LOG4CXX_CAST_MAP()
EMSAppender();
EMSAppender(const LogString& serverUrl, const LogString& queueName,
const LogString& userName, const LogString& password);
~EMSAppender();
void append(const spi::LoggingEventPtr& event);
void append(const spi::LoggingEventPtr& event, log4cxx::helpers::Pool&
p);
protected:
virtual bool checkEntryConditions() const;
public:
void close() { };
protected:
void setOption(const LogString& option,
const LogString& value);
tibemsConnection connection;
tibemsSession session;
tibemsMsgProducer msgProducer;
tibemsDestination destination;
LogString serverUrl;
LogString queueName;
LogString userName;
LogString password;
public:
void activateOptions(log4cxx::helpers::Pool& /* pool */);
protected:
virtual void subAppend(const spi::LoggingEventPtr& event,
log4cxx::helpers::Pool& p);
public:
virtual bool requiresLayout() const { return true; }
void setServerUrl(LogString serverUrl) { serverUrl = serverUrl; };
void setQueueName(LogString qn) { queueName = qn; };
void setUserName (LogString un) { userName = un; };
void setPassword (LogString pwd) { password = pwd; };
LogString getServerUrl() { return serverUrl; }
LogString getQueueName() { return queueName; }
LogString getUserName() { return userName; }
LogString getPassword() { return password; }
/**
Clear internal references to the writer and other variables.
Subclasses can override this method for an alternate closing
behavior. */
protected:
virtual void reset();
};
carnold-3 wrote:
>
>
> On Dec 2, 2007, at 11:33 PM, Ashfaque wrote:
>
>>
>> Hi,
>>
>> I am trying to add a custom appender using version 0.10.0 of
>> log4cxx. But I
>> am receiving the following linker errors. Can anyone help me out in
>> resolving these errors?
>>
>> Error 25 error LNK2019: unresolved external symbol
>> "__declspec(dllimport)
>> public: virtual bool __thiscall EMSAppender::instanceof(class
>> log4cxx::helpers::Class const &)const "
>> (__imp_?instanceof@EMSAppender@@UBE_NABVClass@helpers@log4cxx@@@Z)
>> referenced in function "[thunk]:public: virtual bool __thiscall
>> EMSAppender::instanceof`vtordisp{4294967292,0}' (class
>> log4cxx::helpers::Class const &)const "
>> (?instanceof@EMSAppender@@
>> $4PPPPPPPM@A@BE_NABVClass@helpers@log4cxx@@@Z)
>> emsappender.obj
>>
>> Error 26 error LNK2019: unresolved external symbol
>> "__declspec(dllimport)
>> public: void __thiscall EMSAppender::`vbase destructor'(void)"
>> (__imp_??_DEMSAppender@@QAEXXZ) referenced in function "public:
>> virtual void
>> * __thiscall EMSAppender::`scalar deleting destructor'(unsigned int)"
>> (??_GEMSAppender@@UAEPAXI@Z) emsappender.obj
>>
>>
>> Thanks,
>> Ashfaq
>>
>
>
> Could you provide more details on how you are defining EMSAppender.
> The header file (or at least a sanitized edition) would be helpful.
>
> The implementation of instanceof() is typically provided by the
> END_LOG4CXX_CAST_MAP macro or inherited from a base class, such as
> AppenderSkeleton. Did you derive from AppenderSkeleton (either
> directly or through another class such as WriterAppender)? If not,
> I'd recommend inheriting from AppenderSkeleton.
>
> You could also try starting with an existing custom appender (like src/
> cpp/vectorappender.h and src/cpp/vectorappender.cpp) and see if you
> can link it correctly and then modify it to match your EMSAppender.
>
>
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Re: log4cxx-0.10.0 - adding a custom appender
Posted by Curt Arnold <ca...@apache.org>.
On Dec 2, 2007, at 11:33 PM, Ashfaque wrote:
>
> Hi,
>
> I am trying to add a custom appender using version 0.10.0 of
> log4cxx. But I
> am receiving the following linker errors. Can anyone help me out in
> resolving these errors?
>
> Error 25 error LNK2019: unresolved external symbol
> "__declspec(dllimport)
> public: virtual bool __thiscall EMSAppender::instanceof(class
> log4cxx::helpers::Class const &)const "
> (__imp_?instanceof@EMSAppender@@UBE_NABVClass@helpers@log4cxx@@@Z)
> referenced in function "[thunk]:public: virtual bool __thiscall
> EMSAppender::instanceof`vtordisp{4294967292,0}' (class
> log4cxx::helpers::Class const &)const "
> (?instanceof@EMSAppender@@
> $4PPPPPPPM@A@BE_NABVClass@helpers@log4cxx@@@Z)
> emsappender.obj
>
> Error 26 error LNK2019: unresolved external symbol
> "__declspec(dllimport)
> public: void __thiscall EMSAppender::`vbase destructor'(void)"
> (__imp_??_DEMSAppender@@QAEXXZ) referenced in function "public:
> virtual void
> * __thiscall EMSAppender::`scalar deleting destructor'(unsigned int)"
> (??_GEMSAppender@@UAEPAXI@Z) emsappender.obj
>
>
> Thanks,
> Ashfaq
>
Could you provide more details on how you are defining EMSAppender.
The header file (or at least a sanitized edition) would be helpful.
The implementation of instanceof() is typically provided by the
END_LOG4CXX_CAST_MAP macro or inherited from a base class, such as
AppenderSkeleton. Did you derive from AppenderSkeleton (either
directly or through another class such as WriterAppender)? If not,
I'd recommend inheriting from AppenderSkeleton.
You could also try starting with an existing custom appender (like src/
cpp/vectorappender.h and src/cpp/vectorappender.cpp) and see if you
can link it correctly and then modify it to match your EMSAppender.