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// Module: Log4CPLUS
// File: appender.cxx
// Created: 6/2001
// Author: Tad E. Smith
//
//
// Copyright 2003-2010 Tad E. Smith
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <log4cplus/appender.h>
#include <log4cplus/layout.h>
#include <log4cplus/helpers/loglog.h>
#include <log4cplus/helpers/pointer.h>
#include <log4cplus/helpers/stringhelper.h>
#include <log4cplus/helpers/property.h>
#include <log4cplus/spi/factory.h>
#include <log4cplus/spi/loggingevent.h>
#include <log4cplus/internal/internal.h>
#include <log4cplus/thread/syncprims-pub-impl.h>
#include <stdexcept>
namespace log4cplus
{
///////////////////////////////////////////////////////////////////////////////
// log4cplus::ErrorHandler dtor
///////////////////////////////////////////////////////////////////////////////
ErrorHandler::ErrorHandler ()
{ }
ErrorHandler::~ErrorHandler()
{ }
///////////////////////////////////////////////////////////////////////////////
// log4cplus::OnlyOnceErrorHandler
///////////////////////////////////////////////////////////////////////////////
OnlyOnceErrorHandler::OnlyOnceErrorHandler()
: firstTime(true)
{ }
OnlyOnceErrorHandler::~OnlyOnceErrorHandler ()
{ }
void
OnlyOnceErrorHandler::error(const log4cplus::tstring& err)
{
if(firstTime) {
helpers::getLogLog().error(err);
firstTime = false;
}
}
void
OnlyOnceErrorHandler::reset()
{
firstTime = true;
}
///////////////////////////////////////////////////////////////////////////////
// log4cplus::Appender ctors
///////////////////////////////////////////////////////////////////////////////
Appender::Appender()
: layout(new SimpleLayout()),
name( LOG4CPLUS_TEXT("") ),
threshold(NOT_SET_LOG_LEVEL),
errorHandler(new OnlyOnceErrorHandler),
useLockFile(false),
closed(false)
{
}
Appender::Appender(const log4cplus::helpers::Properties & properties)
: layout(new SimpleLayout())
, name()
, threshold(NOT_SET_LOG_LEVEL)
, errorHandler(new OnlyOnceErrorHandler)
, useLockFile(false)
, closed(false)
{
if(properties.exists( LOG4CPLUS_TEXT("layout") ))
{
log4cplus::tstring const & factoryName
= properties.getProperty( LOG4CPLUS_TEXT("layout") );
spi::LayoutFactory* factory
= spi::getLayoutFactoryRegistry().get(factoryName);
if(factory == 0) {
helpers::getLogLog().error(
LOG4CPLUS_TEXT("Cannot find LayoutFactory: \"")
+ factoryName
+ LOG4CPLUS_TEXT("\"") );
return;
}
helpers::Properties layoutProperties =
properties.getPropertySubset( LOG4CPLUS_TEXT("layout.") );
try {
std::auto_ptr<Layout> newLayout(factory->createObject(layoutProperties));
if(newLayout.get() == 0) {
helpers::getLogLog().error(
LOG4CPLUS_TEXT("Failed to create appender: ")
+ factoryName);
}
else {
layout = newLayout;
}
}
catch(std::exception const & e) {
helpers::getLogLog().error(
LOG4CPLUS_TEXT("Error while creating Layout: ")
+ LOG4CPLUS_C_STR_TO_TSTRING(e.what()));
return;
}
}
// Support for appender.Threshold in properties configuration file
if(properties.exists(LOG4CPLUS_TEXT("Threshold"))) {
tstring tmp = properties.getProperty(LOG4CPLUS_TEXT("Threshold"));
tmp = log4cplus::helpers::toUpper(tmp);
threshold = log4cplus::getLogLevelManager().fromString(tmp);
}
// Configure the filters
helpers::Properties filterProps
= properties.getPropertySubset( LOG4CPLUS_TEXT("filters.") );
unsigned filterCount = 0;
spi::FilterPtr filterChain;
tstring filterName;
while (filterProps.exists(
filterName = helpers::convertIntegerToString (++filterCount)))
{
tstring const & factoryName = filterProps.getProperty(filterName);
spi::FilterFactory* factory
= spi::getFilterFactoryRegistry().get(factoryName);
if(! factory)
{
tstring err = LOG4CPLUS_TEXT("Appender::ctor()- Cannot find FilterFactory: ");
helpers::getLogLog().error(err + factoryName);
continue;
}
spi::FilterPtr tmpFilter = factory->createObject (
filterProps.getPropertySubset(filterName + LOG4CPLUS_TEXT(".")));
if (! tmpFilter)
{
tstring err = LOG4CPLUS_TEXT("Appender::ctor()- Failed to create filter: ");
helpers::getLogLog().error(err + filterName);
}
if (! filterChain)
filterChain = tmpFilter;
else
filterChain->appendFilter(tmpFilter);
}
setFilter(filterChain);
properties.getBool (useLockFile, LOG4CPLUS_TEXT("UseLockFile"));
if (useLockFile)
{
tstring const & lockFileName
= properties.getProperty (LOG4CPLUS_TEXT ("LockFile"));
if (! lockFileName.empty ())
{
try
{
lockFile.reset (new helpers::LockFile (lockFileName));
}
catch (std::runtime_error const &)
{
return;
}
}
else
{
helpers::getLogLog ().debug (
LOG4CPLUS_TEXT (
"UseLockFile is true but LockFile is not specified"));
}
}
}
Appender::~Appender()
{ }
///////////////////////////////////////////////////////////////////////////////
// log4cplus::Appender public methods
///////////////////////////////////////////////////////////////////////////////
void
Appender::destructorImpl()
{
helpers::getLogLog().debug( LOG4CPLUS_TEXT("Destroying appender named [")
+ name
+ LOG4CPLUS_TEXT("]."));
// An appender might be closed then destroyed. There is no
// point in closing twice.
if(closed)
return;
close();
closed = true;
}
void
Appender::doAppend(const log4cplus::spi::InternalLoggingEvent& event)
{
thread::MutexGuard guard (access_mutex);
if(closed) {
helpers::getLogLog().error(
LOG4CPLUS_TEXT("Attempted to append to closed appender named [")
+ name
+ LOG4CPLUS_TEXT("]."));
return;
}
// Check appender's threshold logging level.
if (! isAsSevereAsThreshold(event.getLogLevel()))
return;
// Evaluate filters attached to this appender.
if (checkFilter(filter.get(), event) == spi::DENY)
return;
// Lock system wide lock.
helpers::LockFileGuard lfguard;
if (useLockFile && lockFile.get ())
{
try
{
lfguard.attach_and_lock (*lockFile);
}
catch (std::runtime_error const &)
{
return;
}
}
// Finally append given event.
append(event);
}
tstring &
Appender::formatEvent (const spi::InternalLoggingEvent& event) const
{
internal::appender_sratch_pad & appender_sp = internal::get_appender_sp ();
detail::clear_tostringstream (appender_sp.oss);
layout->formatAndAppend(appender_sp.oss, event);
appender_sp.oss.str().swap (appender_sp.str);
return appender_sp.str;
}
log4cplus::tstring
Appender::getName()
{
return name;
}
void
Appender::setName(const log4cplus::tstring& n)
{
this->name = n;
}
ErrorHandler*
Appender::getErrorHandler()
{
return errorHandler.get();
}
void
Appender::setErrorHandler(std::auto_ptr<ErrorHandler> eh)
{
if (! eh.get())
{
// We do not throw exception here since the cause is probably a
// bad config file.
helpers::getLogLog().warn(
LOG4CPLUS_TEXT("You have tried to set a null error-handler."));
return;
}
thread::MutexGuard guard (access_mutex);
this->errorHandler = eh;
}
void
Appender::setLayout(std::auto_ptr<Layout> lo)
{
thread::MutexGuard guard (access_mutex);
this->layout = lo;
}
Layout*
Appender::getLayout()
{
return layout.get();
}
} // namespace log4cplus
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