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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* \class storage::StorageComponent
* \ingroup common
*
* \brief Component class including some storage specific information.
*
* The storage framework defines components with generic functionality.
* The storage component inherits from this and adds some storage specific
* components. Further, the distributor component and service layer component
* will inherit from this to also include distributor and service layer specific
* implementations.
*/
/**
* \class storage::StorageComponentRegister
* \ingroup common
*
* \brief Specialization of ComponentRegister handling storage components.
*/
/**
* \class storage::StorageManagedComponent
* \ingroup common
*
* \brief Specialization of ManagedComponent to set storage functionality.
*
* A storage component register will use this interface in order to set the
* storage functionality parts.
*/
#pragma once
#include "cluster_context.h"
#include <vespa/storageframework/generic/component/component.h>
#include <vespa/storageframework/generic/component/componentregister.h>
#include <vespa/document/bucket/bucketidfactory.h>
#include <vespa/vdslib/state/node.h>
#include <mutex>
namespace document {
class DocumentTypeRepo;
class FieldSetRepo;
}
namespace storage {
namespace lib {
class Distribution;
}
struct NodeStateUpdater;
struct StorageComponentRegister;
class StorageComponent : public framework::Component
{
public:
struct Repos {
explicit Repos(std::shared_ptr<const document::DocumentTypeRepo> repo);
~Repos();
const std::shared_ptr<const document::DocumentTypeRepo> documentTypeRepo;
const std::shared_ptr<const document::FieldSetRepo> fieldSetRepo;
};
using UP = std::unique_ptr<StorageComponent>;
using DistributionSP = std::shared_ptr<lib::Distribution>;
/**
* Node type is supposed to be set immediately, and never be updated.
* Thus it does not need to be threadsafe. Should never be used before set.
*/
void setNodeInfo(vespalib::stringref clusterName, const lib::NodeType& nodeType, uint16_t index);
/**
* Node state updater is supposed to be set immediately, and never be
* updated. Thus it does not need to be threadsafe. Should never be used
* before set.
*/
void setNodeStateUpdater(NodeStateUpdater& updater);
void setDocumentTypeRepo(std::shared_ptr<const document::DocumentTypeRepo>);
void setBucketIdFactory(const document::BucketIdFactory&);
void setDistribution(DistributionSP);
StorageComponent(StorageComponentRegister&, vespalib::stringref name);
~StorageComponent() override;
const ClusterContext & cluster_context() const noexcept { return _cluster_ctx; }
const lib::NodeType& getNodeType() const { return *_nodeType; }
uint16_t getIndex() const { return _index; }
lib::Node getNode() const { return lib::Node(*_nodeType, _index); }
vespalib::string getIdentity() const;
std::shared_ptr<Repos> getTypeRepo() const;
const document::BucketIdFactory& getBucketIdFactory() const { return _bucketIdFactory; }
DistributionSP getDistribution() const;
NodeStateUpdater& getStateUpdater() const;
uint64_t getGeneration() const { return _generation.load(std::memory_order_relaxed); }
private:
SimpleClusterContext _cluster_ctx;
const lib::NodeType* _nodeType;
uint16_t _index;
std::shared_ptr<Repos> _repos;
// TODO: move _distribution in to _repos so lock will only taken once and only copying one shared_ptr.
document::BucketIdFactory _bucketIdFactory;
DistributionSP _distribution;
NodeStateUpdater* _nodeStateUpdater;
mutable std::mutex _lock;
std::atomic<uint64_t> _generation;
};
struct StorageComponentRegister : public virtual framework::ComponentRegister
{
virtual void registerStorageComponent(StorageComponent&) = 0;
};
} // storage
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