Function getStorageInfo

fdbserver/ApplyMetadataMutation.cpp:36–50

#include "flow/Trace.h"

Reference<StorageInfo> getStorageInfo(UID id,
                                      std::map<UID, Reference<StorageInfo>>* storageCache,
                                      IKeyValueStore* txnStateStore) {
	Reference<StorageInfo> storageInfo;
	auto cacheItr = storageCache->find(id);
	if (cacheItr == storageCache->end()) {
		storageInfo = makeReference<StorageInfo>();
		storageInfo->tag = decodeServerTagValue(txnStateStore->readValue(serverTagKeyFor(id)).get().get());
		storageInfo->interf = decodeServerListValue(txnStateStore->readValue(serverListKeyFor(id)).get().get());
		(*storageCache)[id] = storageInfo;
	} else {
		storageInfo = cacheItr->second;
	}
	return storageInfo;
}
namespace {

// It is incredibly important that any modifications to txnStateStore are done in such a way that the same operations