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ca61ca4f57
Add a number of slides that cover most of CXX's functionality and demonstrate how it can be used. Fixes #823. --------- Co-authored-by: Martin Geisler <mgeisler@google.com>
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#include "include/blobstore.h"
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#include "main.rs.h"
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#include <algorithm>
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#include <functional>
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namespace org {
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namespace blobstore {
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BlobstoreClient::BlobstoreClient() {}
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// Upload a new blob and return a blobid that serves as a handle to the blob.
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uint64_t BlobstoreClient::put(MultiBuf &buf) {
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std::string contents;
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// Traverse the caller's chunk iterator.
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//
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// In reality there might be sophisticated batching of chunks and/or parallel
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// upload implemented by the blobstore's C++ client.
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while (true) {
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auto chunk = next_chunk(buf);
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if (chunk.size() == 0) {
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break;
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}
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contents.append(reinterpret_cast<const char *>(chunk.data()), chunk.size());
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}
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// Insert into map and provide caller the handle.
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auto blobid = std::hash<std::string>{}(contents);
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blobs[blobid] = {std::move(contents), {}};
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return blobid;
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}
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// Add tag to an existing blob.
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void BlobstoreClient::tag(uint64_t blobid, rust::Str tag) {
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blobs[blobid].tags.emplace(tag);
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}
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// Retrieve metadata about a blob.
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BlobMetadata BlobstoreClient::metadata(uint64_t blobid) const {
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BlobMetadata metadata{};
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auto blob = blobs.find(blobid);
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if (blob != blobs.end()) {
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metadata.size = blob->second.data.size();
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std::for_each(blob->second.tags.cbegin(), blob->second.tags.cend(),
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[&](auto &t) { metadata.tags.emplace_back(t); });
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}
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return metadata;
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}
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std::unique_ptr<BlobstoreClient> new_blobstore_client() {
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return std::make_unique<BlobstoreClient>();
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}
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} // namespace blobstore
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} // namespace org
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