| /* |
| * 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. |
| */ |
| #define __STDC_CONSTANT_MACROS |
| #include <log4cxx/logstring.h> |
| #include <log4cxx/helpers/filewatchdog.h> |
| #include <log4cxx/helpers/loglog.h> |
| #include <log4cxx/helpers/transcoder.h> |
| #include <log4cxx/helpers/exception.h> |
| #include <log4cxx/helpers/threadutility.h> |
| #include <log4cxx/helpers/stringhelper.h> |
| #include <functional> |
| #include <chrono> |
| |
| using namespace LOG4CXX_NS; |
| using namespace LOG4CXX_NS::helpers; |
| |
| long FileWatchdog::DEFAULT_DELAY = 60000; |
| |
| struct FileWatchdog::FileWatchdogPrivate{ |
| FileWatchdogPrivate(const File& file1) : |
| file(file1), delay(DEFAULT_DELAY), lastModif(0), |
| warnedAlready(false), interrupted(0), thread(){} |
| |
| /** |
| The name of the file to observe for changes. |
| */ |
| File file; |
| |
| /** |
| The delay to observe between every check. |
| By default set DEFAULT_DELAY.*/ |
| long delay; |
| log4cxx_time_t lastModif; |
| bool warnedAlready; |
| volatile int interrupted; |
| Pool pool; |
| std::thread thread; |
| std::condition_variable interrupt; |
| std::mutex interrupt_mutex; |
| }; |
| |
| FileWatchdog::FileWatchdog(const File& file1) |
| : m_priv(std::make_unique<FileWatchdogPrivate>(file1)) |
| { |
| } |
| |
| FileWatchdog::~FileWatchdog() |
| { |
| if (m_priv->thread.joinable()) |
| stop(); |
| } |
| |
| |
| bool FileWatchdog::is_active() |
| { |
| return m_priv->thread.joinable(); |
| } |
| |
| void FileWatchdog::stop() |
| { |
| LogLog::debug(LOG4CXX_STR("Stopping file watchdog")); |
| { |
| std::lock_guard<std::mutex> lock(m_priv->interrupt_mutex); |
| m_priv->interrupted = 0xFFFF; |
| } |
| m_priv->interrupt.notify_all(); |
| m_priv->thread.join(); |
| } |
| |
| const File& FileWatchdog::file() |
| { |
| return m_priv->file; |
| } |
| |
| void FileWatchdog::checkAndConfigure() |
| { |
| LogString msg(LOG4CXX_STR("Checking [")); |
| msg += m_priv->file.getPath(); |
| msg += LOG4CXX_STR("]"); |
| LogLog::debug(msg); |
| Pool pool1; |
| |
| if (!m_priv->file.exists(pool1)) |
| { |
| if (!m_priv->warnedAlready) |
| { |
| LogLog::debug(((LogString) LOG4CXX_STR("[")) |
| + m_priv->file.getPath() |
| + LOG4CXX_STR("] does not exist.")); |
| m_priv->warnedAlready = true; |
| } |
| } |
| else |
| { |
| auto thisMod = m_priv->file.lastModified(pool1); |
| |
| if (thisMod > m_priv->lastModif) |
| { |
| m_priv->lastModif = thisMod; |
| doOnChange(); |
| m_priv->warnedAlready = false; |
| } |
| } |
| } |
| |
| void FileWatchdog::run() |
| { |
| LogString msg(LOG4CXX_STR("Checking [")); |
| msg += m_priv->file.getPath(); |
| msg += LOG4CXX_STR("] at "); |
| StringHelper::toString((int)m_priv->delay, m_priv->pool, msg); |
| msg += LOG4CXX_STR(" ms interval"); |
| LogLog::debug(msg); |
| |
| while (!is_interrupted()) |
| { |
| std::unique_lock<std::mutex> lock( m_priv->interrupt_mutex ); |
| if (!m_priv->interrupt.wait_for( lock, std::chrono::milliseconds( m_priv->delay ), |
| std::bind(&FileWatchdog::is_interrupted, this) )) |
| checkAndConfigure(); |
| } |
| |
| LogString msg2(LOG4CXX_STR("Stop checking [")); |
| msg2 += m_priv->file.getPath(); |
| msg2 += LOG4CXX_STR("]"); |
| LogLog::debug(msg2); |
| } |
| |
| void FileWatchdog::start() |
| { |
| checkAndConfigure(); |
| if (!m_priv->thread.joinable()) |
| { |
| m_priv->interrupted = 0; |
| m_priv->thread = ThreadUtility::instance()->createThread(LOG4CXX_STR("FileWatchdog"), &FileWatchdog::run, this); |
| } |
| } |
| |
| bool FileWatchdog::is_interrupted() |
| { |
| return m_priv->interrupted == 0xFFFF; |
| } |
| |
| void FileWatchdog::setDelay(long delay1){ |
| m_priv->delay = delay1; |
| } |