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// Copyright (c) 2011 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 <algorithm>
#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/browser/net/passive_log_collector.h"
#include "chrome/common/chrome_switches.h"
ChromeNetLog::ThreadSafeObserverImpl::ThreadSafeObserverImpl(LogLevel log_level)
: net_log_(NULL),
ALLOW_THIS_IN_INITIALIZER_LIST(internal_observer_(this, log_level)) {
}
ChromeNetLog::ThreadSafeObserverImpl::~ThreadSafeObserverImpl() {
DCHECK(!net_log_);
}
void ChromeNetLog::ThreadSafeObserverImpl::AddAsObserver(
ChromeNetLog* net_log) {
DCHECK(!net_log_);
net_log_ = net_log;
net_log_->AddThreadSafeObserver(&internal_observer_);
}
void ChromeNetLog::ThreadSafeObserverImpl::RemoveAsObserver() {
DCHECK(net_log_);
net_log_->RemoveThreadSafeObserver(&internal_observer_);
net_log_ = NULL;
}
void ChromeNetLog::ThreadSafeObserverImpl::SetLogLevel(
net::NetLog::LogLevel log_level) {
DCHECK(net_log_);
base::AutoLock lock(net_log_->lock_);
internal_observer_.SetLogLevel(log_level);
net_log_->UpdateLogLevel();
}
void ChromeNetLog::ThreadSafeObserverImpl::
AddAsObserverAndGetAllPassivelyCapturedEvents(
ChromeNetLog* net_log,
EntryList* entries) {
DCHECK(!net_log_);
net_log_ = net_log;
net_log_->AddObserverAndGetAllPassivelyCapturedEvents(&internal_observer_,
entries);
}
void ChromeNetLog::ThreadSafeObserverImpl::AssertNetLogLockAcquired() const {
if (net_log_)
net_log_->lock_.AssertAcquired();
}
ChromeNetLog::ThreadSafeObserverImpl::PassThroughObserver::PassThroughObserver(
ChromeNetLog::ThreadSafeObserverImpl* owner,
net::NetLog::LogLevel log_level)
: net::NetLog::ThreadSafeObserver(log_level),
ALLOW_THIS_IN_INITIALIZER_LIST(owner_(owner)) {
}
void ChromeNetLog::ThreadSafeObserverImpl::PassThroughObserver::OnAddEntry(
net::NetLog::EventType type,
const base::TimeTicks& time,
const net::NetLog::Source& source,
net::NetLog::EventPhase phase,
net::NetLog::EventParameters* params) {
owner_->OnAddEntry(type, time, source, phase, params);
}
void ChromeNetLog::ThreadSafeObserverImpl::PassThroughObserver::SetLogLevel(
net::NetLog::LogLevel log_level) {
log_level_ = log_level;
}
ChromeNetLog::Entry::Entry(uint32 order,
net::NetLog::EventType type,
const base::TimeTicks& time,
net::NetLog::Source source,
net::NetLog::EventPhase phase,
net::NetLog::EventParameters* params)
: order(order),
type(type),
time(time),
source(source),
phase(phase),
params(params) {
}
ChromeNetLog::Entry::~Entry() {}
ChromeNetLog::ChromeNetLog()
: last_id_(0),
base_log_level_(LOG_BASIC),
effective_log_level_(LOG_BASIC),
passive_collector_(new PassiveLogCollector),
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);
}
}
passive_collector_->AddAsObserver(this);
load_timing_observer_->AddAsObserver(this);
if (command_line->HasSwitch(switches::kLogNetLog)) {
net_log_logger_.reset(new NetLogLogger(
command_line->GetSwitchValuePath(switches::kLogNetLog)));
net_log_logger_->AddAsObserver(this);
}
}
ChromeNetLog::~ChromeNetLog() {
passive_collector_->RemoveAsObserver();
load_timing_observer_->RemoveAsObserver();
if (net_log_logger_.get()) {
net_log_logger_->RemoveAsObserver();
}
}
void ChromeNetLog::AddEntry(EventType type,
const base::TimeTicks& time,
const Source& source,
EventPhase phase,
EventParameters* params) {
base::AutoLock lock(lock_);
// Notify all of the log observers.
FOR_EACH_OBSERVER(ThreadSafeObserver, observers_,
OnAddEntry(type, time, source, phase, params));
}
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) {
base::AutoLock lock(lock_);
AddObserverWhileLockHeld(observer);
}
void ChromeNetLog::RemoveThreadSafeObserver(
net::NetLog::ThreadSafeObserver* observer) {
base::AutoLock lock(lock_);
observers_.RemoveObserver(observer);
UpdateLogLevel();
}
void ChromeNetLog::AddObserverAndGetAllPassivelyCapturedEvents(
net::NetLog::ThreadSafeObserver* observer, EntryList* passive_entries) {
base::AutoLock lock(lock_);
AddObserverWhileLockHeld(observer);
passive_collector_->GetAllCapturedEvents(passive_entries);
}
void ChromeNetLog::GetAllPassivelyCapturedEvents(EntryList* passive_entries) {
base::AutoLock lock(lock_);
passive_collector_->GetAllCapturedEvents(passive_entries);
}
void ChromeNetLog::ClearAllPassivelyCapturedEvents() {
base::AutoLock lock(lock_);
passive_collector_->Clear();
}
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);
}
void ChromeNetLog::AddObserverWhileLockHeld(
net::NetLog::ThreadSafeObserver* observer) {
observers_.AddObserver(observer);
UpdateLogLevel();
}
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