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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "imported_attributes_context.h"
#include "imported_attributes_repo.h"
#include <vespa/searchlib/attribute/attribute_read_guard.h>
#include <vespa/searchlib/attribute/attributeguard.h>
#include <vespa/searchlib/attribute/imported_attribute_vector.h>
#include <vespa/vespalib/stllike/hash_map.hpp>
using search::attribute::IAttributeVector;
using search::attribute::ImportedAttributeVector;
using LockGuard = std::lock_guard<std::mutex>;
namespace proton {
const IAttributeVector *
ImportedAttributesContext::getOrCacheAttribute(const vespalib::string &name, AttributeCache &attributes, bool stableEnumGuard) const
{
auto itr = attributes.find(name);
if (itr != attributes.end()) {
return itr->second->attribute();
}
const ImportedAttributeVector::SP & result = _repo.get(name);
if (result) {
auto metaItr = _metaStores.find(result->getTargetDocumentMetaStore().get());
std::shared_ptr<MetaStoreReadGuard> metaGuard;
if (metaItr == _metaStores.end()) {
metaGuard = result->getTargetDocumentMetaStore()->getReadGuard();
_metaStores.emplace(result->getTargetDocumentMetaStore().get(), metaGuard);
} else {
metaGuard = metaItr->second;
}
auto insRes = attributes.insert(std::make_pair(name, result->makeReadGuard(std::move(metaGuard), stableEnumGuard)));
return insRes.first->second->attribute();
} else {
return nullptr;
}
}
const IAttributeVector *
ImportedAttributesContext::getOrCacheAttributeMtSafe(const vespalib::string &name, AttributeCache &attributes, bool stableEnumGuard) const {
LockGuard guard(_cacheMutex);
return getOrCacheAttribute(name, attributes, stableEnumGuard);
}
ImportedAttributesContext::ImportedAttributesContext(const ImportedAttributesRepo &repo)
: _repo(repo),
_mtSafe(false),
_guardedAttributes(),
_enumGuardedAttributes(),
_metaStores(),
_cacheMutex()
{
}
ImportedAttributesContext::~ImportedAttributesContext() = default;
const IAttributeVector *
ImportedAttributesContext::getAttribute(const vespalib::string &name) const
{
return _mtSafe
? getOrCacheAttributeMtSafe(name, _guardedAttributes, false)
: getOrCacheAttribute(name, _guardedAttributes, false);
}
const IAttributeVector *
ImportedAttributesContext::getAttributeStableEnum(const vespalib::string &name) const
{
return _mtSafe
? getOrCacheAttributeMtSafe(name, _enumGuardedAttributes, true)
: getOrCacheAttribute(name, _enumGuardedAttributes, true);
}
void
ImportedAttributesContext::getAttributeList(std::vector<const IAttributeVector *> &list) const
{
std::vector<ImportedAttributeVector::SP> attributes;
_repo.getAll(attributes);
for (const auto &attr : attributes) {
list.push_back(getAttribute(attr->getName()));
}
}
void
ImportedAttributesContext::releaseEnumGuards()
{
if (_mtSafe) {
LockGuard guard(_cacheMutex);
_enumGuardedAttributes.clear();
} else {
_enumGuardedAttributes.clear();
}
}
void
ImportedAttributesContext::asyncForAttribute(const vespalib::string &, std::unique_ptr<IAttributeFunctor> ) const {
throw std::runtime_error("proton::ImportedAttributesContext::asyncForAttribute should never be called.");
}
}
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