Change logging to easylogging++

This replaces the epee and data_loggers logging systems with
a single one, and also adds filename:line and explicit severity
levels. Categories may be defined, and logging severity set
by category (or set of categories). epee style 0-4 log level
maps to a sensible severity configuration. Log files now also
rotate when reaching 100 MB.

To select which logs to output, use the MONERO_LOGS environment
variable, with a comma separated list of categories (globs are
supported), with their requested severity level after a colon.
If a log matches more than one such setting, the last one in
the configuration string applies. A few examples:

This one is (mostly) silent, only outputting fatal errors:

MONERO_LOGS=*:FATAL

This one is very verbose:

MONERO_LOGS=*:TRACE

This one is totally silent (logwise):

MONERO_LOGS=""

This one outputs all errors and warnings, except for the
"verify" category, which prints just fatal errors (the verify
category is used for logs about incoming transactions and
blocks, and it is expected that some/many will fail to verify,
hence we don't want the spam):

MONERO_LOGS=*:WARNING,verify:FATAL

Log levels are, in decreasing order of priority:
FATAL, ERROR, WARNING, INFO, DEBUG, TRACE

Subcategories may be added using prefixes and globs. This
example will output net.p2p logs at the TRACE level, but all
other net* logs only at INFO:

MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE

Logs which are intended for the user (which Monero was using
a lot through epee, but really isn't a nice way to go things)
should use the "global" category. There are a few helper macros
for using this category, eg: MGINFO("this shows up by default")
or MGINFO_RED("this is red"), to try to keep a similar look
and feel for now.

Existing epee log macros still exist, and map to the new log
levels, but since they're used as a "user facing" UI element
as much as a logging system, they often don't map well to log
severities (ie, a log level 0 log may be an error, or may be
something we want the user to see, such as an important info).
In those cases, I tried to use the new macros. In other cases,
I left the existing macros in. When modifying logs, it is
probably best to switch to the new macros with explicit levels.

The --log-level options and set_log commands now also accept
category settings, in addition to the epee style log levels.

1 files changed, 0 insertions, 202 deletions

diff --git a/src/p2p/data_logger.cpp b/src/p2p/data_logger.cpp
deleted file mode 100644
index fe54aef63..000000000
--- a/src/p2p/data_logger.cpp
+++ /dev/null
@@ -1,202 +0,0 @@
-// Copyright (c) 2014-2016, The Monero Project
-// 
-// All rights reserved.
-// 
-// Redistribution and use in source and binary forms, with or without modification, are
-// permitted provided that the following conditions are met:
-// 
-// 1. Redistributions of source code must retain the above copyright notice, this list of
-//    conditions and the following disclaimer.
-// 
-// 2. Redistributions in binary form must reproduce the above copyright notice, this list
-//    of conditions and the following disclaimer in the documentation and/or other
-//    materials provided with the distribution.
-// 
-// 3. Neither the name of the copyright holder nor the names of its contributors may be
-//    used to endorse or promote products derived from this software without specific
-//    prior written permission.
-// 
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
-// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
-// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "data_logger.hpp"
-#include <stdexcept>
-
-#include <boost/chrono.hpp>
-#include <boost/filesystem.hpp>
-#include <boost/thread.hpp>
-#include <chrono>
-#include "../../contrib/otshell_utils/utils.hpp"
-
-namespace epee
-{
-namespace net_utils
-{
-	data_logger &data_logger::get_instance() {
-		boost::call_once(m_singleton, 
-			[] { 
-				_info_c("dbg/data","Creating singleton of data_logger");
-				if (m_state != data_logger_state::state_before_init) { _erro_c("dbg/data","Internal error in singleton"); throw std::runtime_error("data_logger singleton"); }
-				m_state = data_logger_state::state_during_init;
-				m_obj.reset(new data_logger());
-				m_state = data_logger_state::state_ready_to_use;
-			}	
-		);
-		
-		if (m_state != data_logger_state::state_ready_to_use) {
-			_erro ("trying to use not working data_logger");
-			throw std::runtime_error("data_logger ctor state");
-		}
-		
-		return * m_obj;
-	}
-	
-	data_logger::data_logger() {
-		_note_c("dbg/data","Starting data logger (for graphs data)");
-		if (m_state != data_logger_state::state_during_init) { _erro_c("dbg/data","Singleton ctor state"); throw std::runtime_error("data_logger ctor state"); }
-		boost::lock_guard<boost::mutex> lock(mMutex); // lock
-		
-		// prepare all the files for given data channels:
-		mFilesMap["peers"] = data_logger::fileData("log/dr-monero/peers.data");
-		mFilesMap["download"] = data_logger::fileData("log/dr-monero/net/in-all.data");
-		mFilesMap["upload"] = data_logger::fileData("log/dr-monero/net/out-all.data");
-		mFilesMap["request"] = data_logger::fileData("log/dr-monero/net/req-all.data");
-		mFilesMap["sleep_down"] = data_logger::fileData("log/dr-monero/down_sleep_log.data");
-		mFilesMap["sleep_up"] = data_logger::fileData("log/dr-monero/up_sleep_log.data");
-		mFilesMap["calc_time"] = data_logger::fileData("log/dr-monero/get_objects_calc_time.data");
-		mFilesMap["blockchain_processing_time"] = data_logger::fileData("log/dr-monero/blockchain_log.data");
-		mFilesMap["block_processing"] = data_logger::fileData("log/dr-monero/block_proc.data");
-		
-		mFilesMap["peers_limit"] = data_logger::fileData("log/dr-monero/peers_limit.info");
-		mFilesMap["download_limit"] = data_logger::fileData("log/dr-monero/limit_down.info");
-		mFilesMap["upload_limit"] = data_logger::fileData("log/dr-monero/limit_up.info");
-		
-		mFilesMap["peers_limit"].mLimitFile = true;
-		mFilesMap["download_limit"].mLimitFile = true;
-		mFilesMap["upload_limit"].mLimitFile = true;
-
-		// do NOT modify mFilesMap below this point, since there is no locking for this used (yet)
-
-		_info_c("dbg/data","Creating thread for data logger"); // create timer thread
-		m_thread_maybe_running=true;
-		std::shared_ptr<boost::thread> logger_thread(new boost::thread([&]() {
-			_info_c("dbg/data","Inside thread for data logger");
-			while (m_state == data_logger_state::state_during_init) { // wait for creation to be done (in other thread, in singleton) before actually running
-				boost::this_thread::sleep_for(boost::chrono::seconds(1));
-			}
-			_info_c("dbg/data","Inside thread for data logger - going into main loop");
-			while (m_state == data_logger_state::state_ready_to_use) { // run as long as we are not closing the single object
-				boost::this_thread::sleep_for(boost::chrono::seconds(1));
-				saveToFile(); // save all the pending data
-			}
-			_info_c("dbg/data","Inside thread for data logger - done the main loop");
-			m_thread_maybe_running=false;
-		}));
-		logger_thread->detach();
-		_info_c("dbg/data","Data logger constructed");
-	}
-
-	data_logger::~data_logger() noexcept(false) {
-		_note_c("dbg/data","Destructor of the data logger");
-		{
-			boost::lock_guard<boost::mutex> lock(mMutex);
-			m_state = data_logger_state::state_dying;
-		}
-		_info_c("dbg/data","State was set to dying");
-		while(m_thread_maybe_running) { // wait for the thread to exit
-			boost::this_thread::sleep_for(boost::chrono::seconds(1));
-			_info_c("dbg/data","Waiting for background thread to exit");
-		}
-		_info_c("dbg/data","Thread exited");
-	}
-
-	void data_logger::kill_instance() { 
-		m_state = data_logger_state::state_dying;
-		m_obj.reset();
-	}
-	
-	void data_logger::add_data(std::string filename, unsigned int data) {
-		boost::lock_guard<boost::mutex> lock(mMutex);
-		if (m_state != data_logger_state::state_ready_to_use) { _info_c("dbg/data","Data logger is not ready, returning."); return; }
-
-		if (mFilesMap.find(filename) == mFilesMap.end()) { // no such file/counter
-			_erro_c("dbg/data","Trying to use not opened data file filename="<<filename);
-			_erro_c("dbg/data","Disabling saving of graphs due to error");
-			m_save_graph=false; // <--- disabling saving graphs
-			return;
-		}
-		
-		if (mFilesMap[filename].mLimitFile) { // this holds a number (that is not additive) - e.g. the limit setting
-			mFilesMap[filename].mDataToSave = data;
-		} else {
-			mFilesMap[filename].mDataToSave += data; // this holds a number that should be sum of all accumulated samples
-		}
-	}
-	
-	bool data_logger::is_dying() {
-		if (m_state == data_logger_state::state_dying) {
-			return true;
-		}
-		else {
-			return false;
-		}
-	}
-
-	void data_logger::saveToFile() {
-		_dbg2_c("dbg/data","saving to files");
-		boost::lock_guard<boost::mutex> lock(mMutex);
-		if (m_state != data_logger_state::state_ready_to_use) { _info_c("dbg/data","Data logger is not ready, returning."); return; }
-		nOT::nUtils::cFilesystemUtils::CreateDirTree("log/dr-monero/net/");
-		for (auto &element : mFilesMap)
-		{
-			element.second.save();
-			if (!element.second.mLimitFile) element.second.mDataToSave = 0;
-		}
-	}
-
-	// the inner class:
-	
-	double data_logger::fileData::get_current_time() {
-		#if defined(__APPLE__)
-		auto point = std::chrono::system_clock::now();
-		#else
-		auto point = std::chrono::steady_clock::now();
-		#endif
-		auto time_from_epoh = point.time_since_epoch();
-		auto ms = std::chrono::duration_cast< std::chrono::milliseconds >( time_from_epoh ).count();
-		double ms_f = ms;
-		return ms_f / 1000.;
-	}
-	
-	data_logger::fileData::fileData(std::string pFile) {
-		_dbg3_c("dbg/data","opening data file named pFile="<<pFile<<" for this="<<this);
-		mFile = std::make_shared<std::ofstream> (pFile);
-		_dbg1_c("dbg/data","opened data file named pFile="<<pFile<<" in mFile="<<mFile<<" for this="<<this);
-		mPath = pFile;
-	}
-	
-	void data_logger::fileData::save() {
-		if (!data_logger::m_save_graph) return; // <--- disabled
-		_dbg2_c("dbg/data","saving to the file now, mFile="<<mFile);
-		mFile->open(mPath, std::ios::app);
-		*mFile << static_cast<int>(get_current_time()) << " " << mDataToSave << std::endl;
-		mFile->close();
-	}
-	
-	
-data_logger_state data_logger::m_state(data_logger_state::state_before_init); ///< (static) state of the singleton object
-std::atomic<bool> data_logger::m_save_graph(false); // (static)
-std::atomic<bool> data_logger::m_thread_maybe_running(false); // (static)
-boost::once_flag data_logger::m_singleton; // (static)
-std::unique_ptr<data_logger> data_logger::m_obj; // (static)
-
-} // namespace
-} // namespace
-