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Merge pull request envoyproxy#7 from qiwzhang/stream_api
New transport with reader writer to support stream.
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| /* Copyright 2017 Google Inc. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| #ifndef MIXERCLIENT_TRANSPORT_H | ||
| #define MIXERCLIENT_TRANSPORT_H | ||
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| #include <functional> | ||
| #include <memory> | ||
| #include <string> | ||
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| #include "google/protobuf/stubs/status.h" | ||
| #include "mixer/api/v1/service.pb.h" | ||
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| namespace istio { | ||
| namespace mixer_client { | ||
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| // A stream write interface implemented by transport layer | ||
| // It will be called by Mixer client. | ||
| template <class RequestType> | ||
| class WriteInterface { | ||
| public: | ||
| virtual ~WriteInterface() {} | ||
| // Write a request message. | ||
| virtual void Write(const RequestType &) = 0; | ||
| // Half close the write direction. | ||
| virtual void WriteDone() = 0; | ||
| // If true, write direction is closed. | ||
| virtual bool is_write_closed() = 0; | ||
| }; | ||
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| // A stream read interface implemented by Mixer client | ||
| // to receive response data, or stream close status. | ||
| // It will be called by the transport layer. | ||
| template <class ResponseType> | ||
| class ReadInterface { | ||
| public: | ||
| virtual ~ReadInterface() {} | ||
| // On receive a response message | ||
| virtual void OnRead(const ResponseType &) = 0; | ||
| // On stream close. | ||
| virtual void OnClose(const ::google::protobuf::util::Status &) = 0; | ||
| }; | ||
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| typedef std::unique_ptr<WriteInterface<::istio::mixer::v1::CheckRequest>> | ||
| CheckWriterPtr; | ||
| typedef std::unique_ptr<WriteInterface<::istio::mixer::v1::ReportRequest>> | ||
| ReportWriterPtr; | ||
| typedef std::unique_ptr<WriteInterface<::istio::mixer::v1::QuotaRequest>> | ||
| QuotaWriterPtr; | ||
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| typedef ReadInterface<::istio::mixer::v1::CheckResponse> *CheckReaderRawPtr; | ||
| typedef ReadInterface<::istio::mixer::v1::ReportResponse> *ReportReaderRawPtr; | ||
| typedef ReadInterface<::istio::mixer::v1::QuotaResponse> *QuotaReaderRawPtr; | ||
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| // This is the transport interface needed by Mixer client. | ||
| // The callers of the Mixer client need to implement this interface and | ||
| // pass it to the client. | ||
| class TransportInterface { | ||
| public: | ||
| virtual ~TransportInterface() {} | ||
| // Create a Check stream | ||
| virtual CheckWriterPtr NewStream(CheckReaderRawPtr) = 0; | ||
| // Create a Report stream | ||
| virtual ReportWriterPtr NewStream(ReportReaderRawPtr) = 0; | ||
| // Create a Quota stream | ||
| virtual QuotaWriterPtr NewStream(QuotaReaderRawPtr) = 0; | ||
| }; | ||
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| } // namespace mixer_client | ||
| } // namespace istio | ||
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| #endif // MIXERCLIENT_TRANSPORT_H |
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