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74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// Interfaces for defining middleware for Flight clients and
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// servers. Currently experimental.
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#pragma once
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#include <map>
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#include <memory>
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#include <string>
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#include <utility>
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#include "arrow/flight/visibility.h" // IWYU pragma: keep
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#include "arrow/status.h"
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#include "arrow/util/string_view.h"
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namespace arrow {
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namespace flight {
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/// \brief Headers sent from the client or server.
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///
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/// Header values are ordered.
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using CallHeaders = std::multimap<util::string_view, util::string_view>;
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/// \brief A write-only wrapper around headers for an RPC call.
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class ARROW_FLIGHT_EXPORT AddCallHeaders {
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public:
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virtual ~AddCallHeaders() = default;
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/// \brief Add a header to be sent to the client.
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virtual void AddHeader(const std::string& key, const std::string& value) = 0;
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};
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/// \brief An enumeration of the RPC methods Flight implements.
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enum class FlightMethod : char {
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Invalid = 0,
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Handshake = 1,
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ListFlights = 2,
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GetFlightInfo = 3,
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GetSchema = 4,
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DoGet = 5,
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DoPut = 6,
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DoAction = 7,
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ListActions = 8,
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DoExchange = 9,
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};
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/// \brief Information about an instance of a Flight RPC.
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struct ARROW_FLIGHT_EXPORT CallInfo {
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public:
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/// \brief The RPC method of this call.
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FlightMethod method;
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};
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} // namespace flight
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} // namespace arrow
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