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
|
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/core/utils/logging/DefaultLogSystem.h>
#include <aws/core/utils/DateTime.h>
#include <aws/core/utils/memory/stl/AWSVector.h>
#include <fstream>
using namespace Aws::Utils;
using namespace Aws::Utils::Logging;
static const char* AllocationTag = "DefaultLogSystem";
static const int BUFFERED_MSG_COUNT = 100;
static std::shared_ptr<Aws::OFStream> MakeDefaultLogFile(const Aws::String& filenamePrefix)
{
Aws::String newFileName = filenamePrefix + DateTime::CalculateGmtTimestampAsString("%Y-%m-%d-%H") + ".log";
return Aws::MakeShared<Aws::OFStream>(AllocationTag, newFileName.c_str(), Aws::OFStream::out | Aws::OFStream::app);
}
static void LogThread(DefaultLogSystem::LogSynchronizationData* syncData, const std::shared_ptr<Aws::OStream>& logFile, const Aws::String& filenamePrefix, bool rollLog)
{
// localtime requires access to env. variables to get Timezone, which is not thread-safe
int32_t lastRolledHour = DateTime::Now().GetHour(false /*localtime*/);
std::shared_ptr<Aws::OStream> log = logFile;
for(;;)
{
std::unique_lock<std::mutex> locker(syncData->m_logQueueMutex);
syncData->m_queueSignal.wait(locker, [&](){ return syncData->m_stopLogging == true || syncData->m_queuedLogMessages.size() > 0; } );
if (syncData->m_stopLogging && syncData->m_queuedLogMessages.size() == 0)
{
break;
}
Aws::Vector<Aws::String> messages(std::move(syncData->m_queuedLogMessages));
syncData->m_queuedLogMessages.reserve(BUFFERED_MSG_COUNT);
locker.unlock();
if (messages.size() > 0)
{
if (rollLog)
{
// localtime requires access to env. variables to get Timezone, which is not thread-safe
int32_t currentHour = DateTime::Now().GetHour(false /*localtime*/);
if (currentHour != lastRolledHour)
{
log = MakeDefaultLogFile(filenamePrefix);
lastRolledHour = currentHour;
}
}
for (const auto& msg : messages)
{
(*log) << msg;
}
log->flush();
}
}
}
DefaultLogSystem::DefaultLogSystem(LogLevel logLevel, const std::shared_ptr<Aws::OStream>& logFile) :
Base(logLevel),
m_syncData(),
m_loggingThread()
{
m_loggingThread = std::thread(LogThread, &m_syncData, logFile, "", false);
}
DefaultLogSystem::DefaultLogSystem(LogLevel logLevel, const Aws::String& filenamePrefix) :
Base(logLevel),
m_syncData(),
m_loggingThread()
{
m_loggingThread = std::thread(LogThread, &m_syncData, MakeDefaultLogFile(filenamePrefix), filenamePrefix, true);
}
DefaultLogSystem::~DefaultLogSystem()
{
{
std::lock_guard<std::mutex> locker(m_syncData.m_logQueueMutex);
m_syncData.m_stopLogging = true;
}
m_syncData.m_queueSignal.notify_one();
m_loggingThread.join();
}
void DefaultLogSystem::ProcessFormattedStatement(Aws::String&& statement)
{
std::unique_lock<std::mutex> locker(m_syncData.m_logQueueMutex);
m_syncData.m_queuedLogMessages.emplace_back(std::move(statement));
if(m_syncData.m_queuedLogMessages.size() >= BUFFERED_MSG_COUNT)
{
locker.unlock();
m_syncData.m_queueSignal.notify_one();
}
else
{
locker.unlock();
}
}
void DefaultLogSystem::Flush()
{
m_syncData.m_queueSignal.notify_one();
}
|
