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/* Copyright 2013 10gen Inc.
*
* 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 "mongo/platform/basic.h"
#include "mongo/tools/tool_logger.h"
#include <iostream>
#include "mongo/base/init.h"
#include "mongo/logger/console_appender.h"
#include "mongo/logger/log_manager.h"
#include "mongo/logger/logger.h"
#include "mongo/logger/message_event.h"
#include "mongo/logger/message_event_utf8_encoder.h"
#include "mongo/tools/tool_options.h"
#include "mongo/util/log.h"
namespace mongo {
namespace {
/*
* Theory of operation:
*
* At process start, the loader initializes "consoleMutex" to NULL. At some point during static
* initialization, the static initialization process, running in the one and only extant thread,
* allocates a new boost::mutex on the heap and assigns consoleMutex to point to it. While
* consoleMutex is still NULL, we know that there is only one thread extant, so it is safe to
* skip locking the consoleMutex in the ErrorConsole constructor. Once the mutex is initialized,
* users of ErrorConsole can start acquiring it.
*/
boost::mutex *consoleMutex = new boost::mutex;
} // namespace
ErrorConsole::ErrorConsole() : _consoleLock() {
if (consoleMutex) {
boost::unique_lock<boost::mutex> lk(*consoleMutex);
lk.swap(_consoleLock);
}
}
std::ostream& ErrorConsole::out() { return std::cerr; }
namespace {
logger::MessageLogDomain* toolErrorOutput = NULL;
logger::MessageLogDomain* toolNonErrorOutput = NULL;
logger::MessageLogDomain* toolNonErrorDecoratedOutput = NULL;
} // namespace
MONGO_INITIALIZER_GENERAL(ToolLogRedirection,
("GlobalLogManager", "EndStartupOptionHandling"),
("default"))(InitializerContext*) {
using logger::MessageEventEphemeral;
using logger::MessageEventDetailsEncoder;
using logger::MessageLogDomain;
using logger::ConsoleAppender;
toolErrorOutput = logger::globalLogManager()->getNamedDomain("toolErrorOutput");
toolNonErrorOutput = logger::globalLogManager()->getNamedDomain("toolNonErrorOutput");
toolNonErrorDecoratedOutput =
logger::globalLogManager()->getNamedDomain("toolNonErrorDecoratedOutput");
// Errors in the tools always go to stderr
toolErrorOutput->attachAppender(
MessageLogDomain::AppenderAutoPtr(
new ConsoleAppender<MessageEventEphemeral, ErrorConsole>(
new logger::MessageEventUnadornedEncoder)));
// If we are outputting data to stdout, we may need to redirect all logging to stderr
if (!toolGlobalParams.canUseStdout) {
logger::globalLogDomain()->clearAppenders();
logger::globalLogDomain()->attachAppender(MessageLogDomain::AppenderAutoPtr(
new ConsoleAppender<MessageEventEphemeral, ErrorConsole>(
new MessageEventDetailsEncoder)));
}
// Only put an appender on our informational messages if we did not use --quiet
if (!toolGlobalParams.quiet) {
if (toolGlobalParams.canUseStdout) {
// If we can use stdout, we can use the ConsoleAppender with the default console
toolNonErrorOutput->attachAppender(
MessageLogDomain::AppenderAutoPtr(
new ConsoleAppender<MessageEventEphemeral>(
new logger::MessageEventUnadornedEncoder)));
toolNonErrorDecoratedOutput->attachAppender(
MessageLogDomain::AppenderAutoPtr(
new ConsoleAppender<MessageEventEphemeral>(
new logger::MessageEventDetailsEncoder)));
}
else {
// If we cannot use stdout, we have to use ErrorConsole to redirect informational
// messages to stderr
toolNonErrorOutput->attachAppender(
MessageLogDomain::AppenderAutoPtr(
new ConsoleAppender<MessageEventEphemeral, ErrorConsole>(
new logger::MessageEventUnadornedEncoder)));
toolNonErrorDecoratedOutput->attachAppender(
MessageLogDomain::AppenderAutoPtr(
new ConsoleAppender<MessageEventEphemeral, ErrorConsole>(
new logger::MessageEventDetailsEncoder)));
}
}
return Status::OK();
}
LogstreamBuilder toolInfoLog() {
return LogstreamBuilder(toolNonErrorDecoratedOutput,
"",
logger::LogSeverity::Log());
}
LogstreamBuilder toolInfoOutput() {
return LogstreamBuilder(toolNonErrorOutput,
"",
logger::LogSeverity::Log());
}
LogstreamBuilder toolError() {
return LogstreamBuilder(toolErrorOutput,
"",
logger::LogSeverity::Log());
}
} // namespace mongo
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