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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @class vdslib::ClusterState
* @ingroup state
*
* @brief Object to represent a system state
*/
#pragma once
#include "node.h"
#include "nodestate.h"
#include <map>
#include <array>
namespace storage::lib {
class Distribution;
class Group;
struct NodeData;
struct SeparatorPrinter;
class ClusterState : public document::Printable {
public:
using NodeMap = std::map<Node, NodeState>;
using NodeCounts = std::array<uint16_t, 2>;
using CSP = std::shared_ptr<const ClusterState>;
using SP = std::shared_ptr<ClusterState>;
using UP = std::unique_ptr<ClusterState>;
ClusterState();
ClusterState(const ClusterState&);
// FIXME make ClusterState parsing not require null termination of string,
// then move to vespalib::stringref
explicit ClusterState(const vespalib::string& serialized);
ClusterState& operator=(const ClusterState& other) = delete;
~ClusterState();
std::string getTextualDifference(const ClusterState& other) const;
void serialize(vespalib::asciistream & out, bool ignoreNewFeatures) const;
bool operator==(const ClusterState& other) const noexcept;
bool operator!=(const ClusterState& other) const noexcept;
uint32_t getVersion() const noexcept { return _version; }
/**
* Returns the smallest number above the highest node index found of the
* given type that is not down.
*/
uint16_t getNodeCount(const NodeType& type) const noexcept { return _nodeCount[type]; }
uint16_t getDistributionBitCount() const noexcept { return _distributionBits; }
const State& getClusterState() const noexcept { return *_clusterState; }
const NodeState& getNodeState(const Node& node) const;
void setVersion(uint32_t version) noexcept { _version = version; }
void setClusterState(const State& state);
void setNodeState(const Node& node, const NodeState& state);
void setDistributionBitCount(uint16_t count) noexcept { _distributionBits = count; }
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
void printStateGroupwise(std::ostream& out, const Distribution&, bool verbose, const std::string& indent) const;
private:
// Preconditions: `key` and `value` MUST point into null-terminated strings.
bool parse(vespalib::stringref key, vespalib::stringref value, NodeData & nodeData);
// Preconditions: `key` and `value` MUST point into null-terminated strings.
bool parseSorD(vespalib::stringref key, vespalib::stringref value, NodeData & nodeData);
void removeExtraElements();
void removeExtraElements(const NodeType& type);
void printStateGroupwise(std::ostream& out, const Group&, bool verbose, const std::string& indent, bool rootGroup) const;
void getTextualDifference(std::ostringstream& builder, const NodeType& type, const ClusterState& other) const;
size_t printStateGroupwise(std::ostream& out, const Group&, bool verbose, const std::string& indent, const NodeType& type) const;
void serialize_nodes(vespalib::asciistream & out, bool ignoreNewFeatures, SeparatorPrinter & sep, const NodeType & nodeType) const;
uint32_t _version;
NodeCounts _nodeCount;
const State* _clusterState;
NodeMap _nodeStates;
vespalib::string _description;
uint16_t _distributionBits;
};
}
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