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// $Id$
#include "orbsvcs/Notify/XML_Saver.h"
#include "ACEXML/common/XML_Util.h"
#include "ace/High_Res_Timer.h"
#include "ace/OS_NS_stdio.h"
#include "ace/OS_NS_unistd.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO_Notify
{
extern const char TOPOLOGY_ID_NAME[];
XML_Saver::XML_Saver(bool timestamp)
: output_ (0)
, close_out_ (false)
, backup_count_ (1)
, timestamp_ (timestamp)
{
}
XML_Saver::~XML_Saver()
{
if (this->output_ != 0)
{
ORBSVCS_ERROR ((LM_ERROR,
ACE_TEXT ("(%P|%t) XML_Saver warning close not called or failed\n")
));
}
}
void
XML_Saver::backup_file_name (ACE_TCHAR * file_path, size_t nfile)
{
ACE_OS::snprintf(file_path, MAXPATHLEN, ACE_TEXT("%s.%3.3d"),
this->base_name_.c_str (),
static_cast<int> (nfile));
}
void
XML_Saver::close (void)
{
if (this->close_out_ && this->output_ != 0)
{
this->end_object(0, "notification_service");
ACE_OS::fclose(this->output_);
this->output_ = 0;
// delete the oldest backup file (if it exists)
size_t nfile = this->backup_count_ - 1;
ACE_TCHAR old_path [MAXPATHLEN + 1];
backup_file_name (old_path, nfile);
ACE_OS::unlink (old_path);
while (nfile != 0)
{
ACE_TCHAR new_path [MAXPATHLEN + 1];
nfile -= 1;
backup_file_name (new_path, nfile);
// this may fail, we don't care
ACE_OS::rename (new_path, old_path);
ACE_OS::strcpy (old_path, new_path);
}
// old_path now contains the name of the backup file
ACE_TString xml_name = this->base_name_;
xml_name += ACE_TEXT(".xml");
ACE_OS::rename (xml_name.c_str (), old_path);
ACE_TString new_name = this->base_name_;
new_name += ACE_TEXT(".new");
ACE_OS::rename (new_name.c_str (), xml_name.c_str ());
}
this->output_ = 0;
}
bool
XML_Saver::open(const ACE_TString & base_name, size_t backup_count)
{
this->base_name_ = base_name;
this->backup_count_ = backup_count;
if (base_name == ACE_TEXT("cout"))
{
this->output_ = stdout;
this->close_out_ = false;
}
else if (base_name == ACE_TEXT("cerr"))
{
this->output_ = stderr;
this->close_out_ = false;
}
else
{
ACE_TString file_name = base_name;
file_name += ACE_TEXT(".new");
this->output_ = ACE_OS::fopen (file_name.c_str(), ACE_TEXT("wb"));
if (this->output_) {
this->close_out_ = true;
} else {
ORBSVCS_ERROR ((LM_ERROR,
ACE_TEXT ("(%P|%t) XML_Saver unable to open %s\n"),
base_name.c_str()));
}
}
if (this->output_ != 0)
{
FILE * const out = this->output_;
ACE_OS::fprintf (out, "<?xml version=\"1.0\"?>\n");
try
{
bool changed = true;
NVPList attrs;
ACE_Time_Value const now = ACE_High_Res_Timer::gettimeofday();
ACE_UINT64 nowus = now.usec();
static const ACE_UINT64 USECSPERSEC = 1000 * 1000;
ACE_UINT64 const tmpus = now.sec();
nowus += tmpus * USECSPERSEC;
ACE_TCHAR nowusstr[128];
ACE_OS::sprintf(nowusstr, ACE_UINT64_FORMAT_SPECIFIER, nowus);
attrs.push_back(NVP("version", "1.0"));
if (this->timestamp_)
{
attrs.push_back(NVP("timestamp", ACE_TEXT_ALWAYS_CHAR(nowusstr)));
}
this->begin_object(0, "notification_service", attrs, changed);
}
catch (const CORBA::Exception& ex)
{
ex._tao_print_exception (
ACE_TEXT (
"(%P|%t) XML_Saver Unknown exception\n"));
if (this->close_out_ && this->output_ != 0)
{
(void) ACE_OS::fclose (this->output_);
}
this->output_ = 0;
}
}
return this->output_ != 0;
}
bool
XML_Saver::begin_object(CORBA::Long id,
const ACE_CString& type,
const NVPList& attrs,
bool /* changed */)
{
ACE_ASSERT(this->output_ != 0);
FILE * const out = this->output_;
ACE_OS::fprintf (out, "%s%s%s", indent_.c_str(), "<", type.c_str());
if (id != 0)
{
// not all ostreams know what to do with a CORBA::Long
long const lid = id;
ACE_OS::fprintf (out, " %s%s%ld%s", TOPOLOGY_ID_NAME, "=\"", lid, "\"");
}
ACE_TString::size_type const BUF_SIZE = 512;
ACE_TString tmp(BUF_SIZE);
for (size_t idx = 0; idx < attrs.size(); ++idx)
{
ACE_TString valuetmp (ACE_TEXT_CHAR_TO_TCHAR (attrs[idx].value.c_str()));
ACEXML_escape_string(valuetmp, tmp);
ACE_OS::fprintf (out, "%s%s%s%s%s"," ",
attrs[idx].name.c_str (),
"=\"", ACE_TEXT_ALWAYS_CHAR (tmp.c_str()), "\"");
}
ACE_OS::fprintf (out, ">\n");
this->indent_ += " ";
return true;
}
void XML_Saver::end_object (CORBA::Long /* id */,
const ACE_CString& type)
{
ACE_ASSERT(this->output_ != 0);
FILE * const out = this->output_;
if (this->indent_.length() >= 2)
{
this->indent_ = this->indent_.substr(2);
}
ACE_OS::fprintf (out, "%s%s%s%s", indent_.c_str(), "</",
type.c_str(), ">\n");
}
} /* namespace TAO_Notify */
TAO_END_VERSIONED_NAMESPACE_DECL
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