Making GCS Client Singleton (#280)

Summary:
Pull Request resolved: #280

Making the GCS Client a singleton

Differential Revision: D37853909

fbshipit-source-id: 49293778ec8ef6da9ede5dff5f8561fcda31fbdc

fbpcf/io/cloud_util/CloudFileUtil.cpp

@@ -5,12 +5,15 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#include "fbpcf/io/cloud_util/CloudFileUtil.h"
 #include <aws/s3/S3Client.h>
+#include <google/cloud/storage/client.h>
 #include <re2/re2.h>
+
 #include "fbpcf/aws/S3Util.h"
 #include "fbpcf/exception/PcfException.h"
 #include "fbpcf/gcp/GCSUtil.h"
+#include "fbpcf/io/cloud_util/CloudFileUtil.h"
+#include "fbpcf/io/cloud_util/GCSClient.h"
 #include "fbpcf/io/cloud_util/GCSFileReader.h"
 #include "fbpcf/io/cloud_util/GCSFileUploader.h"
 #include "fbpcf/io/cloud_util/S3Client.h"
@@ -65,7 +68,9 @@ std::unique_ptr<IFileReader> getCloudFileReader(const std::string& filePath) {
             fbpcf::aws::S3ClientOption{.region = ref.region})
             .getS3Client());
   } else if (fileType == CloudFileType::GCS) {
-    return std::make_unique<GCSFileReader>(fbpcf::gcp::createGCSClient());
+    return std::make_unique<GCSFileReader>(
+        fbpcf::cloudio::GCSClient::getInstance(fbpcf::gcp::GCSClientOption{})
+            .getGCSClient());
   } else {
     throw fbpcf::PcfException("Not supported yet.");
   }
@@ -83,7 +88,9 @@ std::unique_ptr<IFileUploader> getCloudFileUploader(
         filePath);
   } else if (fileType == CloudFileType::GCS) {
     return std::make_unique<GCSFileUploader>(
-        fbpcf::gcp::createGCSClient(), filePath);
+        fbpcf::cloudio::GCSClient::getInstance(fbpcf::gcp::GCSClientOption{})
+            .getGCSClient(),
+        filePath);
   } else {
     throw fbpcf::PcfException("Not supported yet.");
   }

fbpcf/io/cloud_util/GCSClient.cpp

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <google/cloud/storage/client.h>
+
+#include "fbpcf/io/cloud_util/GCSClient.h"
+
+namespace fbpcf::cloudio {
+GCSClient& GCSClient::getInstance(const fbpcf::gcp::GCSClientOption& option) {
+  static GCSClient GCSClient(option);
+  return GCSClient;
+}
+} // namespace fbpcf::cloudio

fbpcf/io/cloud_util/GCSClient.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <memory>
+
+#include <google/cloud/storage/client.h>
+#include "fbpcf/gcp/GCSUtil.h"
+
+namespace fbpcf::cloudio {
+
+class GCSClient {
+ private:
+  explicit GCSClient(const fbpcf::gcp::GCSClientOption& option) {
+    GCSClient_ = fbpcf::gcp::createGCSClient();
+  }
+
+ public:
+  static GCSClient& getInstance(const fbpcf::gcp::GCSClientOption& option);
+
+  std::shared_ptr<google::cloud::storage::Client> getGCSClient() {
+    return GCSClient_;
+  }
+
+ private:
+  std::shared_ptr<google::cloud::storage::Client> GCSClient_;
+};
+
+} // namespace fbpcf::cloudio