chrome_net_log.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/net/chrome_net_log.h"
6
7#include "base/command_line.h"
8#include "base/logging.h"
9#include "base/string_util.h"
10#include "base/strings/string_number_conversions.h"
11#include "base/values.h"
12#include "chrome/browser/net/load_timing_observer.h"
13#include "chrome/browser/net/net_log_logger.h"
14#include "chrome/browser/net/net_log_temp_file.h"
15#include "chrome/common/chrome_switches.h"
16
17ChromeNetLog::ChromeNetLog()
18    : last_id_(0),
19      base_log_level_(LOG_BASIC),
20      effective_log_level_(LOG_BASIC),
21      load_timing_observer_(new LoadTimingObserver()),
22      net_log_temp_file_(new NetLogTempFile(this)) {
23  const CommandLine* command_line = CommandLine::ForCurrentProcess();
24  // Adjust base log level based on command line switch, if present.
25  // This is done before adding any observers so the call to UpdateLogLevel when
26  // an observers is added will set |effective_log_level_| correctly.
27  if (command_line->HasSwitch(switches::kNetLogLevel)) {
28    std::string log_level_string =
29        command_line->GetSwitchValueASCII(switches::kNetLogLevel);
30    int command_line_log_level;
31    if (base::StringToInt(log_level_string, &command_line_log_level) &&
32        command_line_log_level >= LOG_ALL &&
33        command_line_log_level <= LOG_BASIC) {
34      base_log_level_ = static_cast<LogLevel>(command_line_log_level);
35    }
36  }
37
38  load_timing_observer_->StartObserving(this);
39
40  if (command_line->HasSwitch(switches::kLogNetLog)) {
41    net_log_logger_.reset(new NetLogLogger(
42        command_line->GetSwitchValuePath(switches::kLogNetLog)));
43    net_log_logger_->StartObserving(this);
44  }
45}
46
47ChromeNetLog::~ChromeNetLog() {
48  net_log_temp_file_.reset();
49  // Remove the observers we own before we're destroyed.
50  RemoveThreadSafeObserver(load_timing_observer_.get());
51  if (net_log_logger_.get())
52    RemoveThreadSafeObserver(net_log_logger_.get());
53}
54
55void ChromeNetLog::OnAddEntry(const net::NetLog::Entry& entry) {
56  base::AutoLock lock(lock_);
57
58  // Notify all of the log observers.
59  FOR_EACH_OBSERVER(ThreadSafeObserver, observers_, OnAddEntry(entry));
60}
61
62uint32 ChromeNetLog::NextID() {
63  return base::subtle::NoBarrier_AtomicIncrement(&last_id_, 1);
64}
65
66net::NetLog::LogLevel ChromeNetLog::GetLogLevel() const {
67  base::subtle::Atomic32 log_level =
68      base::subtle::NoBarrier_Load(&effective_log_level_);
69  return static_cast<net::NetLog::LogLevel>(log_level);
70}
71
72void ChromeNetLog::AddThreadSafeObserver(
73    net::NetLog::ThreadSafeObserver* observer,
74    LogLevel log_level) {
75  base::AutoLock lock(lock_);
76
77  observers_.AddObserver(observer);
78  OnAddObserver(observer, log_level);
79  UpdateLogLevel();
80}
81
82void ChromeNetLog::SetObserverLogLevel(
83    net::NetLog::ThreadSafeObserver* observer,
84    LogLevel log_level) {
85  base::AutoLock lock(lock_);
86
87  DCHECK(observers_.HasObserver(observer));
88  OnSetObserverLogLevel(observer, log_level);
89  UpdateLogLevel();
90}
91
92void ChromeNetLog::RemoveThreadSafeObserver(
93    net::NetLog::ThreadSafeObserver* observer) {
94  base::AutoLock lock(lock_);
95
96  DCHECK(observers_.HasObserver(observer));
97  observers_.RemoveObserver(observer);
98  OnRemoveObserver(observer);
99  UpdateLogLevel();
100}
101
102void ChromeNetLog::UpdateLogLevel() {
103  lock_.AssertAcquired();
104
105  // Look through all the observers and find the finest granularity
106  // log level (higher values of the enum imply *lower* log levels).
107  LogLevel new_effective_log_level = base_log_level_;
108  ObserverListBase<ThreadSafeObserver>::Iterator it(observers_);
109  ThreadSafeObserver* observer;
110  while ((observer = it.GetNext()) != NULL) {
111    new_effective_log_level =
112        std::min(new_effective_log_level, observer->log_level());
113  }
114  base::subtle::NoBarrier_Store(&effective_log_level_,
115                                new_effective_log_level);
116}
117