75 lines
3.1 KiB
C++
75 lines
3.1 KiB
C++
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/*
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* GrvProxyInterface.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2020 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FDBCLIENT_GRVPROXYINTERFACE_H
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#define FDBCLIENT_GRVPROXYINTERFACE_H
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#pragma once
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#include "flow/FileIdentifier.h"
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#include "fdbrpc/fdbrpc.h"
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#include "fdbclient/FDBTypes.h"
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// GrvProxy is proxy primarily specializing on serving GetReadVersion. It also serves health metrics since it
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// communicates with RateKeeper to gather health information of the cluster.
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struct GrvProxyInterface {
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constexpr static FileIdentifier file_identifier = 8743216;
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enum { LocationAwareLoadBalance = 1 };
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enum { AlwaysFresh = 1 };
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Optional<Key> processId;
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bool provisional;
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RequestStream<struct GetReadVersionRequest>
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getConsistentReadVersion; // Returns a version which (1) is committed, and (2) is >= the latest version reported
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// committed (by a commit response) when this request was sent
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// (at some point between when this request is sent and when its response is received, the latest version reported
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// committed)
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RequestStream<ReplyPromise<Void>> waitFailure; // reports heartbeat to master.
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RequestStream<struct GetHealthMetricsRequest> getHealthMetrics;
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UID id() const { return getConsistentReadVersion.getEndpoint().token; }
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std::string toString() const { return id().shortString(); }
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bool operator==(GrvProxyInterface const& r) const { return id() == r.id(); }
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bool operator!=(GrvProxyInterface const& r) const { return id() != r.id(); }
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NetworkAddress address() const { return getConsistentReadVersion.getEndpoint().getPrimaryAddress(); }
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NetworkAddressList addresses() const { return getConsistentReadVersion.getEndpoint().addresses; }
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template <class Archive>
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void serialize(Archive& ar) {
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serializer(ar, processId, provisional, getConsistentReadVersion);
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if (Archive::isDeserializing) {
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waitFailure =
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RequestStream<ReplyPromise<Void>>(getConsistentReadVersion.getEndpoint().getAdjustedEndpoint(1));
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getHealthMetrics = RequestStream<struct GetHealthMetricsRequest>(
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getConsistentReadVersion.getEndpoint().getAdjustedEndpoint(2));
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}
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}
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void initEndpoints() {
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std::vector<std::pair<FlowReceiver*, TaskPriority>> streams;
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streams.push_back(getConsistentReadVersion.getReceiver(TaskPriority::ReadSocket));
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streams.push_back(waitFailure.getReceiver());
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streams.push_back(getHealthMetrics.getReceiver());
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FlowTransport::transport().addEndpoints(streams);
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}
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};
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#endif // FDBCLIENT_GRVPROXYINTERFACE_H
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