DatabaseNodeImp.cpp

#include <xrpl/nodestore/detail/DatabaseNodeImp.h>
 
namespace xrpl {
namespace NodeStore {
 
void
DatabaseNodeImp::store(NodeObjectType type, Blob&& data, uint256 const& hash, std::uint32_t)
{
    storeStats(1, data.size());
 
    auto obj = NodeObject::createObject(type, std::move(data), hash);
    backend_->store(obj);
}
 
void
DatabaseNodeImp::asyncFetch(
    uint256 const& hash,
    std::uint32_t ledgerSeq,
    std::function<void(std::shared_ptr<NodeObject> const&)>&& callback)
{
    Database::asyncFetch(hash, ledgerSeq, std::move(callback));
}
 
std::shared_ptr<NodeObject>
DatabaseNodeImp::fetchNodeObject(uint256 const& hash, std::uint32_t, FetchReport& fetchReport, bool duplicate)
{
    std::shared_ptr<NodeObject> nodeObject = nullptr;
    Status status;
 
    try
    {
        status = backend_->fetch(hash.data(), &nodeObject);
    }
    catch (std::exception const& e)
    {
        JLOG(j_.fatal()) << "fetchNodeObject " << hash << ": Exception fetching from backend: " << e.what();
        Rethrow();
    }
 
    switch (status)
    {
        case ok:
        case notFound:
            break;
        case dataCorrupt:
            JLOG(j_.fatal()) << "fetchNodeObject " << hash << ": nodestore data is corrupted";
            break;
        default:
            JLOG(j_.warn()) << "fetchNodeObject " << hash << ": backend returns unknown result " << status;
            break;
    }
 
    if (nodeObject)
        fetchReport.wasFound = true;
 
    return nodeObject;
}
 
std::vector<std::shared_ptr<NodeObject>>
DatabaseNodeImp::fetchBatch(std::vector<uint256> const& hashes)
{
    using namespace std::chrono;
    auto const before = steady_clock::now();
 
    std::vector<uint256 const*> batch{};
    batch.reserve(hashes.size());
    for (size_t i = 0; i < hashes.size(); ++i)
    {
        auto const& hash = hashes[i];
        batch.push_back(&hash);
    }
 
    // Get the node objects that match the hashes from the backend. To protect
    // against the backends returning fewer or more results than expected, the
    // container is resized to the number of hashes.
    auto results = backend_->fetchBatch(batch).first;
    XRPL_ASSERT(
        results.size() == hashes.size() || results.empty(),
        "number of output objects either matches number of input hashes or is empty");
    results.resize(hashes.size());
    for (size_t i = 0; i < results.size(); ++i)
    {
        if (!results[i])
        {
            JLOG(j_.error()) << "fetchBatch - "
                             << "record not found in db. hash = " << strHex(hashes[i]);
        }
    }
 
    auto fetchDurationUs = std::chrono::duration_cast<std::chrono::microseconds>(steady_clock::now() - before).count();
    updateFetchMetrics(hashes.size(), 0, fetchDurationUs);
    return results;
}
 
}  // namespace NodeStore
}  // namespace xrpl