1 files changed, 121 insertions, 0 deletions
diff --git a/tensorflow/core/platform/s3/aws_logging.cc b/tensorflow/core/platform/s3/aws_logging.cc
new file mode 100644
index 0000000000..41b854d634
--- /dev/null
+++ b/tensorflow/core/platform/s3/aws_logging.cc
@@ -0,0 +1,121 @@
+/* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+#include "tensorflow/core/platform/s3/aws_logging.h"
+#include "tensorflow/core/lib/strings/stringprintf.h"
+#include "tensorflow/core/platform/logging.h"
+#include "tensorflow/core/platform/mutex.h"
+
+#include <aws/core/Aws.h>
+#include <aws/core/utils/logging/AWSLogging.h>
+#include <aws/core/utils/logging/LogSystemInterface.h>
+
+#include <cstdarg>
+
+namespace tensorflow {
+
+AWSLogSystem::AWSLogSystem(Aws::Utils::Logging::LogLevel log_level)
+    : log_level_(log_level) {}
+
+void AWSLogSystem::Log(Aws::Utils::Logging::LogLevel log_level, const char* tag,
+                       const char* format, ...) {
+  std::va_list args;
+  va_start(args, format);
+
+  const string s = strings::Printf(format, args);
+
+  va_end(args);
+
+  LogMessage(log_level, s);
+}
+
+void AWSLogSystem::LogStream(Aws::Utils::Logging::LogLevel log_level,
+                             const char* tag,
+                             const Aws::OStringStream& message_stream) {
+  LogMessage(log_level, message_stream.rdbuf()->str().c_str());
+}
+
+void AWSLogSystem::LogMessage(Aws::Utils::Logging::LogLevel log_level,
+                              const std::string& message) {
+  switch (log_level) {
+    case Aws::Utils::Logging::LogLevel::Info:
+      LOG(INFO) << message;
+      break;
+    case Aws::Utils::Logging::LogLevel::Warn:
+      LOG(WARNING) << message;
+      break;
+    case Aws::Utils::Logging::LogLevel::Error:
+      LOG(ERROR) << message;
+      break;
+    case Aws::Utils::Logging::LogLevel::Fatal:
+      LOG(FATAL) << message;
+      break;
+    default:
+      LOG(ERROR) << message;
+      break;
+  }
+}
+
+namespace {
+static const char* kAWSLoggingTag = "AWSLogging";
+
+Aws::Utils::Logging::LogLevel ParseLogLevelFromEnv() {
+  Aws::Utils::Logging::LogLevel log_level = Aws::Utils::Logging::LogLevel::Info;
+
+  const int64_t level = tensorflow::internal::MinLogLevelFromEnv();
+
+  switch (level) {
+    case INFO:
+      log_level = Aws::Utils::Logging::LogLevel::Info;
+      break;
+    case WARNING:
+      log_level = Aws::Utils::Logging::LogLevel::Warn;
+      break;
+    case ERROR:
+      log_level = Aws::Utils::Logging::LogLevel::Error;
+      break;
+    case FATAL:
+      log_level = Aws::Utils::Logging::LogLevel::Fatal;
+      break;
+    default:
+      log_level = Aws::Utils::Logging::LogLevel::Info;
+      break;
+  }
+
+  return log_level;
+}
+}
+
+static bool initialized = false;
+static mutex s3_logging_mutex(LINKER_INITIALIZED);
+void AWSLogSystem::InitializeAWSLogging() {
+  std::lock_guard<mutex> s3_logging_lock(s3_logging_mutex);
+  if (!initialized) {
+    Aws::Utils::Logging::InitializeAWSLogging(
+        Aws::MakeShared<AWSLogSystem>(kAWSLoggingTag, ParseLogLevelFromEnv()));
+    initialized = true;
+    return;
+  }
+}
+
+void AWSLogSystem::ShutdownAWSLogging() {
+  std::lock_guard<mutex> s3_logging_lock(s3_logging_mutex);
+  if (initialized) {
+    Aws::Utils::Logging::ShutdownAWSLogging();
+    initialized = false;
+    return;
+  }
+}
+
+}  // namespace tensorflow