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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/document/bucket/bucketspace.h>
#include <vespa/searchcore/proton/common/handlermap.hpp>
#include <vespa/vespalib/util/sequence.h>
#include <memory>
#include <unordered_map>
namespace document { class DocumentId; }
namespace proton {
class DocTypeName;
class IPersistenceHandler;
/**
* Class that maintains a set of PersistenceHandler instances
* and provides mapping from bucket space to the set of handlers in that space.
*/
class PersistenceHandlerMap {
public:
using DocTypeToHandlerMap = HandlerMap<IPersistenceHandler>;
using PersistenceHandlerSP = std::shared_ptr<IPersistenceHandler>;
class HandlerSnapshot {
private:
DocTypeToHandlerMap::Snapshot _handlers;
public:
HandlerSnapshot() : _handlers() {}
HandlerSnapshot(DocTypeToHandlerMap::Snapshot handlers_)
: _handlers(std::move(handlers_))
{}
HandlerSnapshot(const HandlerSnapshot &) = delete;
HandlerSnapshot & operator = (const HandlerSnapshot &) = delete;
~HandlerSnapshot();
size_t size() const { return _handlers.size(); }
vespalib::Sequence<IPersistenceHandler*> &handlers() { return _handlers; }
static DocTypeToHandlerMap::Snapshot release(HandlerSnapshot &&rhs) { return std::move(rhs._handlers); }
};
class UnsafeHandlerSnapshot {
private:
DocTypeToHandlerMap::UnsafeSnapshot _handlers;
public:
UnsafeHandlerSnapshot() : _handlers() {}
UnsafeHandlerSnapshot(DocTypeToHandlerMap::UnsafeSnapshot handlers_)
: _handlers(std::move(handlers_))
{}
UnsafeHandlerSnapshot(const UnsafeHandlerSnapshot &) = delete;
UnsafeHandlerSnapshot & operator = (const UnsafeHandlerSnapshot &) = delete;
~UnsafeHandlerSnapshot();
size_t size() const { return _handlers.size(); }
vespalib::Sequence<IPersistenceHandler*> &handlers() { return _handlers; }
};
private:
struct BucketSpaceHash {
std::size_t operator() (const document::BucketSpace &bucketSpace) const { return bucketSpace.getId(); }
};
std::unordered_map<document::BucketSpace, DocTypeToHandlerMap, BucketSpaceHash> _map;
public:
PersistenceHandlerMap();
PersistenceHandlerSP putHandler(document::BucketSpace bucketSpace, const DocTypeName &docType, const PersistenceHandlerSP &handler);
PersistenceHandlerSP removeHandler(document::BucketSpace bucketSpace, const DocTypeName &docType);
IPersistenceHandler * getHandler(document::BucketSpace bucketSpace, const DocTypeName &docType) const;
HandlerSnapshot getHandlerSnapshot() const;
HandlerSnapshot getHandlerSnapshot(document::BucketSpace bucketSpace) const;
UnsafeHandlerSnapshot getUnsafeHandlerSnapshot(document::BucketSpace bucketSpace) const;
};
}
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