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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/net/chrome_net_log.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "base/string_util.h"
#include "base/values.h"
#include "chrome/browser/net/load_timing_observer.h"
#include "chrome/browser/net/net_log_logger.h"
#include "chrome/common/chrome_switches.h"
ChromeNetLog::ChromeNetLog()
: last_id_(0),
base_log_level_(LOG_BASIC),
effective_log_level_(LOG_BASIC),
load_timing_observer_(new LoadTimingObserver()) {
const CommandLine* command_line = CommandLine::ForCurrentProcess();
// Adjust base log level based on command line switch, if present.
// This is done before adding any observers so the call to UpdateLogLevel when
// an observers is added will set |effective_log_level_| correctly.
if (command_line->HasSwitch(switches::kNetLogLevel)) {
std::string log_level_string =
command_line->GetSwitchValueASCII(switches::kNetLogLevel);
int command_line_log_level;
if (base::StringToInt(log_level_string, &command_line_log_level) &&
command_line_log_level >= LOG_ALL &&
command_line_log_level <= LOG_BASIC) {
base_log_level_ = static_cast<LogLevel>(command_line_log_level);
}
}
load_timing_observer_->StartObserving(this);
if (command_line->HasSwitch(switches::kLogNetLog)) {
net_log_logger_.reset(new NetLogLogger(
command_line->GetSwitchValuePath(switches::kLogNetLog)));
net_log_logger_->StartObserving(this);
}
}
ChromeNetLog::~ChromeNetLog() {
// Remove the observers we own before we're destroyed.
RemoveThreadSafeObserver(load_timing_observer_.get());
if (net_log_logger_.get())
RemoveThreadSafeObserver(net_log_logger_.get());
}
void ChromeNetLog::OnAddEntry(const net::NetLog::Entry& entry) {
base::AutoLock lock(lock_);
// Notify all of the log observers.
FOR_EACH_OBSERVER(ThreadSafeObserver, observers_, OnAddEntry(entry));
}
uint32 ChromeNetLog::NextID() {
return base::subtle::NoBarrier_AtomicIncrement(&last_id_, 1);
}
net::NetLog::LogLevel ChromeNetLog::GetLogLevel() const {
base::subtle::Atomic32 log_level =
base::subtle::NoBarrier_Load(&effective_log_level_);
return static_cast<net::NetLog::LogLevel>(log_level);
}
void ChromeNetLog::AddThreadSafeObserver(
net::NetLog::ThreadSafeObserver* observer,
LogLevel log_level) {
base::AutoLock lock(lock_);
observers_.AddObserver(observer);
OnAddObserver(observer, log_level);
UpdateLogLevel();
}
void ChromeNetLog::SetObserverLogLevel(
net::NetLog::ThreadSafeObserver* observer,
LogLevel log_level) {
base::AutoLock lock(lock_);
DCHECK(observers_.HasObserver(observer));
OnSetObserverLogLevel(observer, log_level);
UpdateLogLevel();
}
void ChromeNetLog::RemoveThreadSafeObserver(
net::NetLog::ThreadSafeObserver* observer) {
base::AutoLock lock(lock_);
DCHECK(observers_.HasObserver(observer));
observers_.RemoveObserver(observer);
OnRemoveObserver(observer);
UpdateLogLevel();
}
void ChromeNetLog::UpdateLogLevel() {
lock_.AssertAcquired();
// Look through all the observers and find the finest granularity
// log level (higher values of the enum imply *lower* log levels).
LogLevel new_effective_log_level = base_log_level_;
ObserverListBase<ThreadSafeObserver>::Iterator it(observers_);
ThreadSafeObserver* observer;
while ((observer = it.GetNext()) != NULL) {
new_effective_log_level =
std::min(new_effective_log_level, observer->log_level());
}
base::subtle::NoBarrier_Store(&effective_log_level_,
new_effective_log_level);
}
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