1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
// 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 "chromeos/network/network_event_log.h"
#include "base/i18n/time_formatting.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/stringprintf.h"
#include "base/utf_string_conversions.h"
namespace chromeos {
namespace network_event_log {
namespace {
struct LogEntry {
LogEntry(const std::string& module,
const std::string& event,
const std::string& description);
std::string ToString() const;
bool ContentEquals(const LogEntry& other) const;
std::string module;
std::string event;
std::string description;
base::Time time;
int count;
};
LogEntry::LogEntry(const std::string& module,
const std::string& event,
const std::string& description)
: module(module),
event(event),
description(description),
time(base::Time::Now()),
count(1) {
}
std::string LogEntry::ToString() const {
std::string line;
line += "[" + UTF16ToUTF8(base::TimeFormatShortDateAndTime(time)) + "]";
line += " " + module + ":" + event;
if (!description.empty())
line += ": " + description;
if (count > 1)
line += StringPrintf(" (%d)", count);
line += "\n";
return line;
}
bool LogEntry::ContentEquals(const LogEntry& other) const {
return module == other.module &&
event == other.event &&
description == other.description;
}
typedef std::deque<LogEntry> LogEntryList;
class NetworkEventLog {
public:
NetworkEventLog() {}
~NetworkEventLog() {}
void AddEntry(const LogEntry& entry);
std::string GetAsString(StringOrder order,
size_t max_events);
private:
LogEntryList entries_;
DISALLOW_COPY_AND_ASSIGN(NetworkEventLog);
};
void NetworkEventLog::AddEntry(const LogEntry& entry) {
if (!entries_.empty()) {
LogEntry& last = entries_.back();
if (last.ContentEquals(entry)) {
// Update count and time for identical events to avoid log spam.
++last.count;
last.time = base::Time::Now();
return;
}
}
if (entries_.size() >= kMaxNetworkEventLogEntries)
entries_.pop_front();
entries_.push_back(entry);
VLOG(2) << entry.ToString();
}
std::string NetworkEventLog::GetAsString(StringOrder order,
size_t max_events) {
if (entries_.empty())
return "No Log Entries.";
std::string result;
if (order == OLDEST_FIRST) {
size_t offset = 0;
if (max_events > 0 && max_events < entries_.size())
offset = entries_.size() - max_events;
for (LogEntryList::const_iterator iter = entries_.begin() + offset;
iter != entries_.end(); ++iter) {
result += (*iter).ToString();
}
} else {
size_t nlines = 0;
// Iterate backwards through the list to show the most recent entries first.
for (LogEntryList::const_reverse_iterator riter = entries_.rbegin();
riter != entries_.rend(); ++riter) {
result += (*riter).ToString();
if (max_events > 0 && ++nlines >= max_events)
break;
}
}
return result;
}
} // namespace
NetworkEventLog* g_network_event_log = NULL;
const size_t kMaxNetworkEventLogEntries = 1000;
void Initialize() {
if (g_network_event_log)
delete g_network_event_log; // reset log
g_network_event_log = new NetworkEventLog();
}
void Shutdown() {
delete g_network_event_log;
g_network_event_log = NULL;
}
bool IsInitialized() {
return g_network_event_log != NULL;
}
void AddEntry(const std::string& module,
const std::string& event,
const std::string& description) {
LogEntry entry(module, event, description);
if (!g_network_event_log) {
VLOG(2) << entry.ToString();
return;
}
g_network_event_log->AddEntry(entry);
}
std::string GetAsString(StringOrder order, size_t max_events) {
if (!g_network_event_log)
return "NetworkEventLog not intitialized.";
return g_network_event_log->GetAsString(order, max_events);
}
} // namespace network_event_log
} // namespace chromeos
|
