129 lines
5.0 KiB
C++
129 lines
5.0 KiB
C++
/*
|
|
* MonitorLeader.h
|
|
*
|
|
* This source file is part of the FoundationDB open source project
|
|
*
|
|
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef FDBCLIENT_MONITORLEADER_H
|
|
#define FDBCLIENT_MONITORLEADER_H
|
|
#pragma once
|
|
|
|
#include "fdbclient/FDBTypes.h"
|
|
#include "fdbclient/CoordinationInterface.h"
|
|
#include "fdbclient/ClusterInterface.h"
|
|
#include "fdbclient/CommitProxyInterface.h"
|
|
|
|
#define CLUSTER_FILE_ENV_VAR_NAME "FDB_CLUSTER_FILE"
|
|
|
|
class ClientCoordinators;
|
|
|
|
struct ClientStatusInfo {
|
|
Key traceLogGroup;
|
|
Standalone<VectorRef<ClientVersionRef>> versions;
|
|
Standalone<VectorRef<StringRef>> issues;
|
|
|
|
ClientStatusInfo() {}
|
|
ClientStatusInfo(Key const& traceLogGroup,
|
|
Standalone<VectorRef<ClientVersionRef>> versions,
|
|
Standalone<VectorRef<StringRef>> issues)
|
|
: traceLogGroup(traceLogGroup), versions(versions), issues(issues) {}
|
|
};
|
|
|
|
struct ClientData {
|
|
std::map<NetworkAddress, ClientStatusInfo> clientStatusInfoMap;
|
|
Reference<AsyncVar<CachedSerialization<ClientDBInfo>>> clientInfo;
|
|
|
|
OpenDatabaseRequest getRequest();
|
|
|
|
ClientData() : clientInfo(new AsyncVar<CachedSerialization<ClientDBInfo>>(CachedSerialization<ClientDBInfo>())) {}
|
|
};
|
|
|
|
struct MonitorLeaderInfo {
|
|
bool hasConnected;
|
|
Reference<ClusterConnectionFile> intermediateConnFile;
|
|
|
|
MonitorLeaderInfo() : hasConnected(false) {}
|
|
explicit MonitorLeaderInfo(Reference<ClusterConnectionFile> intermediateConnFile)
|
|
: intermediateConnFile(intermediateConnFile), hasConnected(false) {}
|
|
};
|
|
|
|
// Monitors the given coordination group's leader election process and provides a best current guess
|
|
// of the current leader. If a leader is elected for long enough and communication with a quorum of
|
|
// coordinators is possible, eventually outKnownLeader will be that leader's interface.
|
|
template <class LeaderInterface>
|
|
Future<Void> monitorLeader(Reference<ClusterConnectionFile> const& connFile,
|
|
Reference<AsyncVar<Optional<LeaderInterface>>> const& outKnownLeader);
|
|
|
|
Future<Void> monitorLeaderForProxies(Value const& key,
|
|
vector<NetworkAddress> const& coordinators,
|
|
ClientData* const& clientData,
|
|
Reference<AsyncVar<Optional<LeaderInfo>>> const& leaderInfo);
|
|
|
|
Future<Void> monitorProxies(
|
|
Reference<AsyncVar<Reference<ClusterConnectionFile>>> const& connFile,
|
|
Reference<AsyncVar<ClientDBInfo>> const& clientInfo,
|
|
Reference<AsyncVar<Optional<ClientLeaderRegInterface>>> const& coordinator,
|
|
Reference<ReferencedObject<Standalone<VectorRef<ClientVersionRef>>>> const& supportedVersions,
|
|
Key const& traceLogGroup);
|
|
|
|
void shrinkProxyList(ClientDBInfo& ni,
|
|
std::vector<UID>& lastCommitProxyUIDs,
|
|
std::vector<CommitProxyInterface>& lastCommitProxies,
|
|
std::vector<UID>& lastGrvProxyUIDs,
|
|
std::vector<GrvProxyInterface>& lastGrvProxies);
|
|
|
|
#ifndef __INTEL_COMPILER
|
|
#pragma region Implementation
|
|
#endif
|
|
|
|
Future<Void> monitorLeaderInternal(Reference<ClusterConnectionFile> const& connFile,
|
|
Reference<AsyncVar<Value>> const& outSerializedLeaderInfo);
|
|
|
|
template <class LeaderInterface>
|
|
struct LeaderDeserializer {
|
|
Future<Void> operator()(const Reference<AsyncVar<Value>>& serializedInfo,
|
|
const Reference<AsyncVar<Optional<LeaderInterface>>>& outKnownLeader) {
|
|
return asyncDeserialize(serializedInfo, outKnownLeader);
|
|
}
|
|
};
|
|
|
|
Future<Void> asyncDeserializeClusterInterface(const Reference<AsyncVar<Value>>& serializedInfo,
|
|
const Reference<AsyncVar<Optional<ClusterInterface>>>& outKnownLeader);
|
|
|
|
template <>
|
|
struct LeaderDeserializer<ClusterInterface> {
|
|
Future<Void> operator()(const Reference<AsyncVar<Value>>& serializedInfo,
|
|
const Reference<AsyncVar<Optional<ClusterInterface>>>& outKnownLeader) {
|
|
return asyncDeserializeClusterInterface(serializedInfo, outKnownLeader);
|
|
}
|
|
};
|
|
|
|
template <class LeaderInterface>
|
|
Future<Void> monitorLeader(Reference<ClusterConnectionFile> const& connFile,
|
|
Reference<AsyncVar<Optional<LeaderInterface>>> const& outKnownLeader) {
|
|
LeaderDeserializer<LeaderInterface> deserializer;
|
|
auto serializedInfo = makeReference<AsyncVar<Value>>();
|
|
Future<Void> m = monitorLeaderInternal(connFile, serializedInfo);
|
|
return m || deserializer(serializedInfo, outKnownLeader);
|
|
}
|
|
|
|
#ifndef __INTEL_COMPILER
|
|
#pragma endregion
|
|
#endif
|
|
|
|
#endif
|