feat: New ETL by default (#2752)

src/etl/impl/AsyncGrpcCall.hpp

@@ -0,0 +1,85 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2024, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#pragma once
+
+#include "etl/InitialLoadObserverInterface.hpp"
+#include "util/log/Logger.hpp"
+
+#include <grpcpp/client_context.h>
+#include <grpcpp/support/status.h>
+#include <xrpl/basics/base_uint.h>
+#include <xrpl/proto/org/xrpl/rpc/v1/get_ledger_data.pb.h>
+#include <xrpl/proto/org/xrpl/rpc/v1/xrp_ledger.grpc.pb.h>
+
+#include <cstdint>
+#include <memory>
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace etl::impl {
+
+class AsyncGrpcCall {
+public:
+    enum class CallStatus { More, Done, Errored };
+    using RequestType = org::xrpl::rpc::v1::GetLedgerDataRequest;
+    using ResponseType = org::xrpl::rpc::v1::GetLedgerDataResponse;
+    using StubType = org::xrpl::rpc::v1::XRPLedgerAPIService::Stub;
+
+private:
+    util::Logger log_{"ETL"};
+
+    std::unique_ptr<ResponseType> cur_;
+    std::unique_ptr<ResponseType> next_;
+
+    RequestType request_;
+    std::unique_ptr<grpc::ClientContext> context_;
+
+    grpc::Status status_;
+    unsigned char nextPrefix_;
+
+    std::string lastKey_;
+    std::optional<std::string> predecessorKey_;
+
+public:
+    AsyncGrpcCall(uint32_t seq, ripple::uint256 const& marker, std::optional<ripple::uint256> const& nextMarker);
+
+    static std::vector<AsyncGrpcCall>
+    makeAsyncCalls(uint32_t const sequence, uint32_t const numMarkers);
+
+    CallStatus
+    process(
+        std::unique_ptr<StubType>& stub,
+        grpc::CompletionQueue& cq,
+        InitialLoadObserverInterface& loader,
+        bool abort
+    );
+
+    void
+    call(std::unique_ptr<org::xrpl::rpc::v1::XRPLedgerAPIService::Stub>& stub, grpc::CompletionQueue& cq);
+
+    std::string
+    getMarkerPrefix();
+
+    std::string
+    getLastKey();
+};
+
+}  // namespace etl::impl