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/*
* (C) Copyright 1996- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation nor
* does it submit to any jurisdiction.
*/
#include <string>
#include "eckit/container/CacheManager.h"
#include "eckit/exception/Exceptions.h"
#include "eckit/log/Log.h"
#include "eckit/testing/Test.h"
namespace eckit::test {
//----------------------------------------------------------------------------------------------------------------------
namespace caching {
struct CacheTraits {
using value_type = std::string;
using Locker = eckit::CacheManagerFileFlock;
static const char* name() { return "test_cachemanager"; }
static const char* extension() { return ".ext"; }
static int version() { return 42; }
static void save(const eckit::CacheManagerBase&, const value_type&, const eckit::PathName& path) {
Log::info() << "CacheTraits::save(path='" << path << "')" << std::endl;
ASSERT(!path.exists());
path.touch();
ASSERT(path.exists());
}
static void load(const eckit::CacheManagerBase&, value_type& value, const eckit::PathName& path) {
Log::info() << "CacheTraits::load(path='" << path << "')" << std::endl;
ASSERT(path.exists());
value = "cached";
}
};
struct Manager : eckit::CacheManager<CacheTraits> {
Manager() : eckit::CacheManager<CacheTraits>("loader", ".", /*throwOnCacheMiss*/ false, /*maxCacheSize*/ 0) {}
private:
friend CacheTraits;
};
struct CacheCreator : Manager::CacheContentCreator {
CacheCreator() = default;
CacheCreator(const CacheCreator&) = delete;
CacheCreator& operator=(const CacheCreator&) = delete;
private:
void create(const eckit::PathName& path, CacheTraits::value_type& value, bool& saved) final {
Log::info() << "CacheCreator::create(path='" << path << "')" << std::endl;
path.touch();
saved = true;
value = "cached";
}
};
struct ManagerCantMiss : eckit::CacheManager<CacheTraits> {
ManagerCantMiss() :
eckit::CacheManager<CacheTraits>("loader", ".", /*throwOnCacheMiss*/ true, /*maxCacheSize*/ 0) {}
private:
friend CacheTraits;
};
struct CacheCreatorCantMiss : ManagerCantMiss::CacheContentCreator {
CacheCreatorCantMiss() = default;
CacheCreatorCantMiss(const CacheCreatorCantMiss&) = delete;
CacheCreatorCantMiss& operator=(const CacheCreatorCantMiss&) = delete;
private:
void create(const eckit::PathName&, CacheTraits::value_type&, bool&) final { NOTIMP; }
};
} // namespace caching
namespace {
void deldir(eckit::PathName& p) {
if (!p.exists()) {
return;
}
std::vector<eckit::PathName> files;
std::vector<eckit::PathName> dirs;
p.children(files, dirs);
for (auto& f : files) {
f.unlink();
}
for (auto& d : dirs) {
deldir(d);
}
p.rmdir();
}
} // namespace
//----------------------------------------------------------------------------------------------------------------------
CASE("test_cachemanager") {
PathName dir = caching::CacheTraits::name();
deldir(dir);
EXPECT(!dir.exists());
using value_t = caching::CacheTraits::value_type;
value_t reference = "cached";
auto cached_path = [&dir](caching::Manager::key_t& key) {
return dir / std::to_string(caching::CacheTraits::version()) / key + caching::CacheTraits::extension();
};
caching::Manager::key_t key = "key";
auto path = cached_path(key);
Log::info() << "path='" << path << "'" << std::endl;
static caching::Manager cache;
caching::CacheCreator creator;
EXPECT(!path.exists());
value_t saved;
cache.getOrCreate(key, creator, saved);
EXPECT(saved == reference);
EXPECT(path.exists());
value_t loaded;
cache.getOrCreate(key, creator, loaded);
EXPECT(loaded == reference);
caching::ManagerCantMiss::key_t missingKey = "missingKey";
auto missingPath = cached_path(missingKey);
Log::info() << "missingPath='" << missingPath << "'" << std::endl;
value_t another;
static caching::ManagerCantMiss strictCache;
caching::CacheCreatorCantMiss strictCreator;
EXPECT(!missingPath.exists());
EXPECT_THROWS(strictCache.getOrCreate(missingKey, strictCreator, another));
EXPECT(!missingPath.exists());
}
//----------------------------------------------------------------------------------------------------------------------
} // namespace eckit::test
int main(int argc, char** argv) {
return eckit::testing::run_tests(argc, argv);
}
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