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storage_object_hold_samples.cc
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storage_object_hold_samples.cc
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// Copyright 2020 Google LLC
//
// 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
//
// https://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 "google/cloud/storage/client.h"
#include "google/cloud/storage/examples/storage_examples_common.h"
#include "google/cloud/internal/getenv.h"
#include <iostream>
namespace {
void SetObjectEventBasedHold(google::cloud::storage::Client client,
std::vector<std::string> const& argv) {
//! [set event based hold] [START storage_set_event_based_hold]
namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
std::string const& object_name) {
StatusOr<gcs::ObjectMetadata> original =
client.GetObjectMetadata(bucket_name, object_name);
if (!original) throw std::move(original).status();
StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
bucket_name, object_name,
gcs::ObjectMetadataPatchBuilder().SetEventBasedHold(true),
gcs::IfMetagenerationMatch(original->metageneration()));
if (!updated) throw std::move(updated).status();
std::cout << "The event hold for object " << updated->name()
<< " in bucket " << updated->bucket() << " is "
<< (updated->event_based_hold() ? "enabled" : "disabled") << "\n";
}
//! [set event based hold] [END storage_set_event_based_hold]
(std::move(client), argv.at(0), argv.at(1));
}
void ReleaseObjectEventBasedHold(google::cloud::storage::Client client,
std::vector<std::string> const& argv) {
//! [release event based hold] [START storage_release_event_based_hold]
namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
std::string const& object_name) {
StatusOr<gcs::ObjectMetadata> original =
client.GetObjectMetadata(bucket_name, object_name);
if (!original) throw std::move(original).status();
StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
bucket_name, object_name,
gcs::ObjectMetadataPatchBuilder().SetEventBasedHold(false),
gcs::IfMetagenerationMatch(original->metageneration()));
if (!updated) throw std::move(updated).status();
std::cout << "The event hold for object " << updated->name()
<< " in bucket " << updated->bucket() << " is "
<< (updated->event_based_hold() ? "enabled" : "disabled") << "\n";
}
//! [release event based hold] [END storage_release_event_based_hold]
(std::move(client), argv.at(0), argv.at(1));
}
void SetObjectTemporaryHold(google::cloud::storage::Client client,
std::vector<std::string> const& argv) {
//! [set temporary hold] [START storage_set_temporary_hold]
namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
std::string const& object_name) {
StatusOr<gcs::ObjectMetadata> original =
client.GetObjectMetadata(bucket_name, object_name);
if (!original) throw std::move(original).status();
StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
bucket_name, object_name,
gcs::ObjectMetadataPatchBuilder().SetTemporaryHold(true),
gcs::IfMetagenerationMatch(original->metageneration()));
if (!updated) throw std::move(updated).status();
std::cout << "The temporary hold for object " << updated->name()
<< " in bucket " << updated->bucket() << " is "
<< (updated->temporary_hold() ? "enabled" : "disabled") << "\n";
}
//! [set temporary hold] [END storage_set_temporary_hold]
(std::move(client), argv.at(0), argv.at(1));
}
void ReleaseObjectTemporaryHold(google::cloud::storage::Client client,
std::vector<std::string> const& argv) {
//! [release temporary hold] [START storage_release_temporary_hold]
namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
std::string const& object_name) {
StatusOr<gcs::ObjectMetadata> original =
client.GetObjectMetadata(bucket_name, object_name);
if (!original) throw std::move(original).status();
StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
bucket_name, object_name,
gcs::ObjectMetadataPatchBuilder().SetTemporaryHold(false),
gcs::IfMetagenerationMatch(original->metageneration()));
if (!updated) throw std::move(updated).status();
std::cout << "The temporary hold for object " << updated->name()
<< " in bucket " << updated->bucket() << " is "
<< (updated->temporary_hold() ? "enabled" : "disabled") << "\n";
}
//! [release temporary hold] [END storage_release_temporary_hold]
(std::move(client), argv.at(0), argv.at(1));
}
void RunAll(std::vector<std::string> const& argv) {
namespace examples = ::google::cloud::storage::examples;
namespace gcs = ::google::cloud::storage;
if (!argv.empty()) throw examples::Usage{"auto"};
examples::CheckEnvironmentVariablesAreSet({
"GOOGLE_CLOUD_PROJECT",
"GOOGLE_CLOUD_CPP_STORAGE_TEST_BUCKET_NAME",
});
auto const project_id =
google::cloud::internal::GetEnv("GOOGLE_CLOUD_PROJECT").value();
auto const bucket_name = google::cloud::internal::GetEnv(
"GOOGLE_CLOUD_CPP_STORAGE_TEST_BUCKET_NAME")
.value();
auto client = gcs::Client();
auto generator = google::cloud::internal::DefaultPRNG(std::random_device{}());
auto const object_name_1 =
examples::MakeRandomObjectName(generator, "object-");
auto const object_name_2 =
examples::MakeRandomObjectName(generator, "object-");
auto constexpr kText = R"""(Some text to populate the test objects)""";
std::cout << "\nCreating the EventBasedHold object" << std::endl;
(void)client
.InsertObject(bucket_name, object_name_1, kText,
gcs::IfGenerationMatch(0))
.value();
std::cout << "\nRunning the SetObjectEventBasedHold() example" << std::endl;
SetObjectEventBasedHold(client, {bucket_name, object_name_1});
std::cout << "\nRunning the ReleaseObjectEventBasedHold() example"
<< std::endl;
ReleaseObjectEventBasedHold(client, {bucket_name, object_name_1});
std::cout << "\nDeleting the EventBasedHold object" << std::endl;
(void)client.DeleteObject(bucket_name, object_name_1);
std::cout << "\nCreating the TemporaryHold object" << std::endl;
(void)client
.InsertObject(bucket_name, object_name_2, kText,
gcs::IfGenerationMatch(0))
.value();
std::cout << "\nRunning the SetObjectTemporaryHold() example" << std::endl;
SetObjectTemporaryHold(client, {bucket_name, object_name_2});
std::cout << "\nRunning the ReleaseObjectTemporaryHold() example"
<< std::endl;
ReleaseObjectTemporaryHold(client, {bucket_name, object_name_2});
std::cout << "\nDeleting the TemporaryHold object" << std::endl;
(void)client.DeleteObject(bucket_name, object_name_2);
}
} // namespace
int main(int argc, char* argv[]) {
namespace examples = ::google::cloud::storage::examples;
auto make_entry = [](std::string const& name,
examples::ClientCommand const& cmd) {
return examples::CreateCommandEntry(
name, {"<bucket-name>", "<object-name>"}, cmd);
};
examples::Example example({
make_entry("set-event-based-hold", SetObjectEventBasedHold),
make_entry("release-event-based-hold", ReleaseObjectEventBasedHold),
make_entry("set-temporary-hold", SetObjectTemporaryHold),
make_entry("release-temporary-hold", ReleaseObjectTemporaryHold),
{"auto", RunAll},
});
return example.Run(argc, argv);
}