279 lines
11 KiB
C++
279 lines
11 KiB
C++
/*
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* BackupContainerAzureBlobStore.actor.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fdbclient/BackupContainerAzureBlobStore.h"
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#include "flow/actorcompiler.h" // This must be the last #include.
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class BackupContainerAzureBlobStoreImpl {
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public:
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using AzureClient = azure::storage_lite::blob_client;
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class ReadFile final : public IAsyncFile, ReferenceCounted<ReadFile> {
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AsyncTaskThread& asyncTaskThread;
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std::string containerName;
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std::string blobName;
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AzureClient* client;
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public:
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ReadFile(AsyncTaskThread& asyncTaskThread, const std::string& containerName, const std::string& blobName,
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AzureClient* client)
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: asyncTaskThread(asyncTaskThread), containerName(containerName), blobName(blobName), client(client) {}
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void addref() override { ReferenceCounted<ReadFile>::addref(); }
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void delref() override { ReferenceCounted<ReadFile>::delref(); }
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Future<int> read(void* data, int length, int64_t offset) {
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return asyncTaskThread.execAsync([client = this->client, containerName = this->containerName,
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blobName = this->blobName, data, length, offset] {
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std::ostringstream oss(std::ios::out | std::ios::binary);
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client->download_blob_to_stream(containerName, blobName, offset, length, oss);
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auto str = oss.str();
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memcpy(data, str.c_str(), str.size());
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return static_cast<int>(str.size());
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});
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}
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Future<Void> zeroRange(int64_t offset, int64_t length) override { throw file_not_writable(); }
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Future<Void> write(void const* data, int length, int64_t offset) override { throw file_not_writable(); }
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Future<Void> truncate(int64_t size) override { throw file_not_writable(); }
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Future<Void> sync() override { throw file_not_writable(); }
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Future<int64_t> size() const override {
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return asyncTaskThread.execAsync([client = this->client, containerName = this->containerName,
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blobName = this->blobName] {
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return static_cast<int64_t>(client->get_blob_properties(containerName, blobName).get().response().size);
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});
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}
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std::string getFilename() const override { return blobName; }
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int64_t debugFD() const override { return 0; }
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};
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class WriteFile final : public IAsyncFile, ReferenceCounted<WriteFile> {
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AsyncTaskThread& asyncTaskThread;
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AzureClient* client;
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std::string containerName;
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std::string blobName;
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int64_t m_cursor{ 0 };
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std::string buffer;
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static constexpr size_t bufferLimit = 1 << 20;
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// From https://tuttlem.github.io/2014/08/18/getting-istream-to-work-off-a-byte-array.html:
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class MemStream : public std::istream {
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class MemBuf : public std::basic_streambuf<char> {
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public:
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MemBuf(const uint8_t* p, size_t l) { setg((char*)p, (char*)p, (char*)p + l); }
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} buffer;
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public:
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MemStream(const uint8_t* p, size_t l) : std::istream(&buffer), buffer(p, l) { rdbuf(&buffer); }
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};
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public:
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WriteFile(AsyncTaskThread& asyncTaskThread, const std::string& containerName, const std::string& blobName,
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AzureClient* client)
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: asyncTaskThread(asyncTaskThread), containerName(containerName), blobName(blobName), client(client) {}
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void addref() override { ReferenceCounted<WriteFile>::addref(); }
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void delref() override { ReferenceCounted<WriteFile>::delref(); }
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Future<int> read(void* data, int length, int64_t offset) override { throw file_not_readable(); }
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Future<Void> write(void const* data, int length, int64_t offset) override {
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if (offset != m_cursor) {
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throw non_sequential_op();
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}
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m_cursor += length;
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auto p = static_cast<char const*>(data);
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buffer.insert(buffer.cend(), p, p + length);
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if (buffer.size() > bufferLimit) {
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return sync();
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} else {
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return Void();
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}
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}
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Future<Void> truncate(int64_t size) override {
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if (size != m_cursor) {
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throw non_sequential_op();
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}
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return Void();
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}
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Future<Void> sync() override {
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return asyncTaskThread.execAsync([client = this->client, containerName = this->containerName,
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blobName = this->blobName, buffer = std::move(this->buffer)] {
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// MemStream memStream(buffer.data(), buffer.size());
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std::istringstream iss(buffer);
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auto resp = client->append_block_from_stream(containerName, blobName, iss).get();
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return Void();
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});
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}
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Future<int64_t> size() const override {
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return asyncTaskThread.execAsync(
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[client = this->client, containerName = this->containerName, blobName = this->blobName] {
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auto resp = client->get_blob_properties(containerName, blobName).get().response();
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ASSERT(resp.valid()); // TODO: Should instead throw here
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return static_cast<int64_t>(resp.size);
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});
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}
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std::string getFilename() const override { return blobName; }
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int64_t debugFD() const override { return -1; }
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};
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class BackupFile final : public IBackupFile, ReferenceCounted<BackupFile> {
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Reference<IAsyncFile> m_file;
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public:
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BackupFile(const std::string& fileName, Reference<IAsyncFile> file) : IBackupFile(fileName), m_file(file) {}
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Future<Void> append(const void* data, int len) override {
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Future<Void> r = m_file->write(data, len, m_offset);
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m_offset += len;
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return r;
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}
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Future<Void> finish() override {
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Reference<BackupFile> self = Reference<BackupFile>::addRef(this);
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return map(m_file->sync(), [=](Void _) {
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self->m_file.clear();
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return Void();
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});
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}
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void addref() override { ReferenceCounted<BackupFile>::addref(); }
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void delref() override { ReferenceCounted<BackupFile>::delref(); }
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};
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static bool isDirectory(const std::string& blobName) { return blobName.size() && blobName.back() == '/'; }
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ACTOR static Future<Reference<IAsyncFile>> readFile(BackupContainerAzureBlobStore* self, std::string fileName) {
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bool exists = wait(self->blobExists(fileName));
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if (!exists) {
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throw file_not_found();
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}
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return Reference<IAsyncFile>(
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new ReadFile(self->asyncTaskThread, self->containerName, fileName, self->client.get()));
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}
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ACTOR static Future<Reference<IBackupFile>> writeFile(BackupContainerAzureBlobStore* self, std::string fileName) {
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wait(self->asyncTaskThread.execAsync(
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[client = self->client.get(), containerName = self->containerName, fileName = fileName] {
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auto outcome = client->create_append_blob(containerName, fileName).get();
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return Void();
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}));
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return Reference<IBackupFile>(
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new BackupFile(fileName, Reference<IAsyncFile>(new WriteFile(self->asyncTaskThread, self->containerName,
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fileName, self->client.get()))));
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}
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static void listFiles(AzureClient* client, const std::string& containerName, const std::string& path,
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std::function<bool(std::string const&)> folderPathFilter,
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BackupContainerFileSystem::FilesAndSizesT& result) {
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auto resp = client->list_blobs_segmented(containerName, "/", "", path).get().response();
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for (const auto& blob : resp.blobs) {
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if (isDirectory(blob.name) && folderPathFilter(blob.name)) {
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listFiles(client, containerName, blob.name, folderPathFilter, result);
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} else {
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result.emplace_back(blob.name, blob.content_length);
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}
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}
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}
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ACTOR static Future<Void> deleteContainer(BackupContainerAzureBlobStore* self, int* pNumDeleted) {
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state int filesToDelete = 0;
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if (pNumDeleted) {
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BackupContainerFileSystem::FilesAndSizesT files = wait(self->listFiles());
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filesToDelete = files.size();
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}
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wait(self->asyncTaskThread.execAsync([containerName = self->containerName, client = self->client.get()] {
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client->delete_container(containerName).wait();
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return Void();
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}));
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if (pNumDeleted) {
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*pNumDeleted += filesToDelete;
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}
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return Void();
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}
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};
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Future<bool> BackupContainerAzureBlobStore::blobExists(const std::string& fileName) {
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return asyncTaskThread.execAsync(
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[client = this->client.get(), containerName = this->containerName, fileName = fileName] {
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auto resp = client->get_blob_properties(containerName, fileName).get().response();
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return resp.valid();
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});
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}
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BackupContainerAzureBlobStore::BackupContainerAzureBlobStore() : containerName("test_container") {
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// std::string account_name = std::getenv("AZURE_TESTACCOUNT");
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// std::string account_key = std::getenv("AZURE_TESTKEY");
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// bool use_https = true;
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// auto credential = std::make_shared<azure::storage_lite::shared_key_credential>(account_name, account_key);
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// auto storage_account =
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// std::make_shared<azure::storage_lite::storage_account>(account_name, credential, use_https);
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auto storage_account = azure::storage_lite::storage_account::development_storage_account();
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client = std::make_unique<AzureClient>(storage_account, 1);
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}
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void BackupContainerAzureBlobStore::addref() {
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return ReferenceCounted<BackupContainerAzureBlobStore>::addref();
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}
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void BackupContainerAzureBlobStore::delref() {
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return ReferenceCounted<BackupContainerAzureBlobStore>::delref();
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}
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Future<Void> BackupContainerAzureBlobStore::create() {
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return asyncTaskThread.execAsync([containerName = this->containerName, client = this->client.get()] {
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client->create_container(containerName).wait();
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return Void();
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});
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}
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Future<bool> BackupContainerAzureBlobStore::exists() {
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return asyncTaskThread.execAsync([containerName = this->containerName, client = this->client.get()] {
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auto resp = client->get_container_properties(containerName).get().response();
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return resp.valid();
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});
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}
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Future<Reference<IAsyncFile>> BackupContainerAzureBlobStore::readFile(std::string fileName) {
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return BackupContainerAzureBlobStoreImpl::readFile(this, fileName);
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}
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Future<Reference<IBackupFile>> BackupContainerAzureBlobStore::writeFile(const std::string& fileName) {
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return BackupContainerAzureBlobStoreImpl::writeFile(this, fileName);
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}
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Future<BackupContainerFileSystem::FilesAndSizesT> BackupContainerAzureBlobStore::listFiles(
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std::string path, std::function<bool(std::string const&)> folderPathFilter) {
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return asyncTaskThread.execAsync([client = this->client.get(), containerName = this->containerName, path = path,
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folderPathFilter = folderPathFilter] {
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FilesAndSizesT result;
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BackupContainerAzureBlobStoreImpl::listFiles(client, containerName, path, folderPathFilter, result);
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return result;
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});
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}
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Future<Void> BackupContainerAzureBlobStore::deleteFile(std::string fileName) {
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return asyncTaskThread.execAsync(
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[containerName = this->containerName, fileName = fileName, client = client.get()]() {
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client->delete_blob(containerName, fileName).wait();
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return Void();
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});
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}
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Future<Void> BackupContainerAzureBlobStore::deleteContainer(int* pNumDeleted) {
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return BackupContainerAzureBlobStoreImpl::deleteContainer(this, pNumDeleted);
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}
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