/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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 <log4cxx/varia/fallbackerrorhandler.h>

#include <log4cxx/helpers/loglog.h>

#include <log4cxx/helpers/stringhelper.h>

#include <log4cxx/hierarchy.h>

#include <log4cxx/logmanager.h>

#if LOG4CXX_ABI_VERSION <= 15

#include <log4cxx/logger.h>

#include <log4cxx/asyncappender.h>

#endif

#include <list>

using namespace LOG4CXX_NS;

using namespace LOG4CXX_NS::helpers;

using namespace LOG4CXX_NS::spi;

using namespace LOG4CXX_NS::varia;

IMPLEMENT_LOG4CXX_OBJECT(FallbackErrorHandler)

struct FallbackErrorHandler::FallbackErrorHandlerPrivate

{

  std::list<AppenderPtr> backup;

  AppenderWeakPtr primary;

  std::map<LogString, spi::AppenderAttachableWeakPtr> appenderHolders;

  bool errorReported = false;

};

FallbackErrorHandler::FallbackErrorHandler()

  : m_priv(std::make_unique<FallbackErrorHandlerPrivate>())

{

}

Unexecuted instantiation: log4cxx::varia::FallbackErrorHandler::FallbackErrorHandler()

Unexecuted instantiation: log4cxx::varia::FallbackErrorHandler::FallbackErrorHandler()

FallbackErrorHandler::~FallbackErrorHandler() {}

void FallbackErrorHandler::addAppenderHolder(const LogString& name, const spi::AppenderAttachablePtr& clx)

{

  if (LogLog::isDebugEnabled())

  {

    LogLog::debug(((LogString) LOG4CXX_STR("FB: Adding appender holder ["))

      + name + LOG4CXX_STR("]."));

  }

  m_priv->appenderHolders.emplace(name, clx);

}

void FallbackErrorHandler::setLogger(const LoggerPtr& logger)

{

  if (LogLog::isDebugEnabled())

  {

    LogLog::debug(((LogString) LOG4CXX_STR("FB: Adding logger ["))

      + logger->getName() + LOG4CXX_STR("]."));

  }

  m_priv->appenderHolders.emplace(logger->getName(), logger);

}

void FallbackErrorHandler::error(const LogString& message) const

{

  LogLog::warn(message);

  m_priv->errorReported = true;

}

void FallbackErrorHandler::error

  ( const LogString& message

  , const std::exception& ex

  , int errorCode

  ) const

{

  error(message, ex, errorCode, 0);

}

void FallbackErrorHandler::error

  ( const LogString& message

  , const std::exception& ex

  , int errorCode

  , const spi::LoggingEventPtr& event

  ) const

{

  if (LogLog::isDebugEnabled())

  {

    LogString msg{ LOG4CXX_STR("FB: error code ") };

    StringHelper::toString(errorCode, msg);

    LogLog::debug(msg);

  }

  LogLog::warn(message, ex);

  AppenderPtr primaryLocked = m_priv->primary.lock();

  AppenderPtr backupLocked;

  if (!m_priv->backup.empty())

  {

    backupLocked = m_priv->backup.front();

    m_priv->backup.pop_front();

  }

  if ( !primaryLocked || !backupLocked )

  {

    return;

  }

  for (auto& item : m_priv->appenderHolders)

  {

    auto holderLocked = item.second.lock();

    if (!holderLocked)

      continue;

    if (LogLog::isDebugEnabled())

    {

      LogLog::debug(LOG4CXX_STR("FB: Replacing [")

        + primaryLocked->getName() + LOG4CXX_STR("] with [")

        + backupLocked->getName() + LOG4CXX_STR("] in [")

        + item.first + LOG4CXX_STR("]."));

    }

#if LOG4CXX_ABI_VERSION <= 15

    bool ok{ false };

    if (auto logger = LOG4CXX_NS::cast<Logger>(holderLocked))

      ok = logger->replaceAppender(primaryLocked, backupLocked);

    else if (auto asyncAppender = LOG4CXX_NS::cast<AsyncAppender>(holderLocked))

      ok = asyncAppender->replaceAppender(primaryLocked, backupLocked);

    if (!ok)

#else

    if (!holderLocked->replaceAppender(primaryLocked, backupLocked))

#endif

    {

      LogLog::debug(LOG4CXX_STR("FB: Failed to replace [")

        + primaryLocked->getName() + LOG4CXX_STR("] with [")

        + backupLocked->getName() + LOG4CXX_STR("] in [")

        + item.first + LOG4CXX_STR("]."));

    }

  }

  m_priv->errorReported = true;

  if (event)

    {

    backupLocked->doAppend(event);

    }

  m_priv->primary = backupLocked;

}

void FallbackErrorHandler::setAppender(const AppenderPtr& primary1)

{

  if (LogLog::isDebugEnabled())

  {

    LogLog::debug(((LogString) LOG4CXX_STR("FB: Setting primary appender to ["))

      + primary1->getName() + LOG4CXX_STR("]."));

  }

  m_priv->primary = primary1;

}

void FallbackErrorHandler::setBackupAppender(const AppenderPtr& backup1)

{

  if (LogLog::isDebugEnabled())

  {

    LogLog::debug(((LogString) LOG4CXX_STR("FB: Setting backup appender to ["))

      + backup1->getName() + LOG4CXX_STR("]."));

  }

  m_priv->backup.push_back(backup1);

}

#if LOG4CXX_ABI_VERSION <= 15

void FallbackErrorHandler::activateOptions(Pool&)

{

}

#endif

void FallbackErrorHandler::setOption(const LogString&, const LogString&)

{

}

bool FallbackErrorHandler::errorReported() const

{

  return m_priv->errorReported;

}