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// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "cache/cache_entry_roles.h"
#include <mutex>
#include "port/lang.h"
namespace ROCKSDB_NAMESPACE {
std::array<std::string, kNumCacheEntryRoles> kCacheEntryRoleToCamelString{{
"DataBlock",
"FilterBlock",
"FilterMetaBlock",
"DeprecatedFilterBlock",
"IndexBlock",
"OtherBlock",
"WriteBuffer",
"CompressionDictionaryBuildingBuffer",
"FilterConstruction",
"BlockBasedTableReader",
"FileMetadata",
"BlobValue",
"BlobCache",
"Misc",
}};
std::array<std::string, kNumCacheEntryRoles> kCacheEntryRoleToHyphenString{{
"data-block",
"filter-block",
"filter-meta-block",
"deprecated-filter-block",
"index-block",
"other-block",
"write-buffer",
"compression-dictionary-building-buffer",
"filter-construction",
"block-based-table-reader",
"file-metadata",
"blob-value",
"blob-cache",
"misc",
}};
const std::string& GetCacheEntryRoleName(CacheEntryRole role) {
return kCacheEntryRoleToHyphenString[static_cast<size_t>(role)];
}
const std::string& BlockCacheEntryStatsMapKeys::CacheId() {
static const std::string kCacheId = "id";
return kCacheId;
}
const std::string& BlockCacheEntryStatsMapKeys::CacheCapacityBytes() {
static const std::string kCacheCapacityBytes = "capacity";
return kCacheCapacityBytes;
}
const std::string&
BlockCacheEntryStatsMapKeys::LastCollectionDurationSeconds() {
static const std::string kLastCollectionDurationSeconds =
"secs_for_last_collection";
return kLastCollectionDurationSeconds;
}
const std::string& BlockCacheEntryStatsMapKeys::LastCollectionAgeSeconds() {
static const std::string kLastCollectionAgeSeconds =
"secs_since_last_collection";
return kLastCollectionAgeSeconds;
}
namespace {
std::string GetPrefixedCacheEntryRoleName(const std::string& prefix,
CacheEntryRole role) {
const std::string& role_name = GetCacheEntryRoleName(role);
std::string prefixed_role_name;
prefixed_role_name.reserve(prefix.size() + role_name.size());
prefixed_role_name.append(prefix);
prefixed_role_name.append(role_name);
return prefixed_role_name;
}
} // namespace
std::string BlockCacheEntryStatsMapKeys::EntryCount(CacheEntryRole role) {
const static std::string kPrefix = "count.";
return GetPrefixedCacheEntryRoleName(kPrefix, role);
}
std::string BlockCacheEntryStatsMapKeys::UsedBytes(CacheEntryRole role) {
const static std::string kPrefix = "bytes.";
return GetPrefixedCacheEntryRoleName(kPrefix, role);
}
std::string BlockCacheEntryStatsMapKeys::UsedPercent(CacheEntryRole role) {
const static std::string kPrefix = "percent.";
return GetPrefixedCacheEntryRoleName(kPrefix, role);
}
namespace {
struct Registry {
std::mutex mutex;
UnorderedMap<Cache::DeleterFn, CacheEntryRole> role_map;
void Register(Cache::DeleterFn fn, CacheEntryRole role) {
std::lock_guard<std::mutex> lock(mutex);
role_map[fn] = role;
}
UnorderedMap<Cache::DeleterFn, CacheEntryRole> Copy() {
std::lock_guard<std::mutex> lock(mutex);
return role_map;
}
};
Registry& GetRegistry() {
STATIC_AVOID_DESTRUCTION(Registry, registry);
return registry;
}
} // namespace
void RegisterCacheDeleterRole(Cache::DeleterFn fn, CacheEntryRole role) {
GetRegistry().Register(fn, role);
}
UnorderedMap<Cache::DeleterFn, CacheEntryRole> CopyCacheDeleterRoleMap() {
return GetRegistry().Copy();
}
} // namespace ROCKSDB_NAMESPACE
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