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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/storage/config/config-stor-prioritymapping.h>
#include <vespa/config/helper/ifetchercallback.h>
#include <vespa/documentapi/messagebus/priority.h>
#include <atomic>
#include <array>
#include <mutex>
namespace config {
class ConfigUri;
class ConfigFetcher;
}
namespace storage {
class PriorityConverter
: public config::IFetcherCallback<
vespa::config::content::core::StorPrioritymappingConfig>
{
public:
using Config = vespa::config::content::core::StorPrioritymappingConfig;
explicit PriorityConverter(const config::ConfigUri& configUri);
~PriorityConverter() override;
/** Converts the given priority into a storage api priority number. */
uint8_t toStoragePriority(documentapi::Priority::Value) const;
/** Converts the given priority into a document api priority number. */
documentapi::Priority::Value toDocumentPriority(uint8_t) const;
void configure(std::unique_ptr<Config> config) override;
private:
static_assert(documentapi::Priority::PRI_ENUM_SIZE == 16,
"Unexpected size of priority enumeration");
static_assert(documentapi::Priority::PRI_LOWEST == 15,
"Priority enum value out of bounds");
static constexpr size_t PRI_ENUM_SIZE = documentapi::Priority::PRI_ENUM_SIZE;
std::array<std::atomic<uint8_t>, PRI_ENUM_SIZE> _mapping;
std::map<uint8_t, documentapi::Priority::Value> _reverseMapping;
mutable std::mutex _mutex;
std::unique_ptr<config::ConfigFetcher> _configFetcher;
};
} // storage
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