public static int[] GetBatchSizes(
int valuesCount,
int maxBatchSize,
BatchBehaviour batchBehaviour)
{
var batchCount = ((valuesCount - 1) / maxBatchSize) + 1;
var batchSizes = new int[batchCount];
if (batchBehaviour == BatchBehaviour.FillBatchesEvenly)
{
var averageBatchSize = (double)valuesCount / batchCount;
var totalAllocated = 0;
for (var index = 0; index < batchCount - 1; index++)
{
var nextBatchSize = (int)(averageBatchSize * (index + 1)) - totalAllocated;
batchSizes[index] = nextBatchSize;
totalAllocated += nextBatchSize;
}
var finalBatchSize = valuesCount - totalAllocated;
batchSizes[batchCount - 1] = finalBatchSize;
}
else
{
for (var index = 0; index < batchCount - 1; index++)
{
batchSizes[index] = maxBatchSize;
}
var finalBatchSize = valuesCount - ((batchCount - 1) * maxBatchSize);
batchSizes[batchCount - 1] = finalBatchSize;
}
return(batchSizes);
}
public TConfig WithBatchedFetches(int maxBatchSize, BatchBehaviour batchBehaviour = BatchBehaviour.FillBatchesEvenly)
{
if (maxBatchSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(maxBatchSize));
}
_config.MaxBatchSize = maxBatchSize;
_config.MaxBatchSizeFactory = null;
_config.BatchBehaviour = batchBehaviour;
return((TConfig)this);
}
public CachedFunctionWithOuterKeyAndInnerEnumerableKeys(
Func <TParams, ReadOnlyMemory <TInnerKey>, CancellationToken, ValueTask <IEnumerable <KeyValuePair <TInnerKey, TValue> > > > originalFunction,
Func <TParams, TOuterKey> keySelector,
CachedFunctionWithOuterKeyAndInnerEnumerableKeysConfiguration <TParams, TOuterKey, TInnerKey, TValue> config)
{
_originalFunction = originalFunction;
_keySelector = keySelector;
_maxBatchSize = config.MaxBatchSize;
_maxBatchSizeFactory = config.MaxBatchSizeFactory;
_batchBehaviour = config.BatchBehaviour;
_onSuccessAction = config.OnSuccessAction;
_onExceptionAction = config.OnExceptionAction;
_filterResponsePredicate = config.FilterResponsePredicate;
if (config.DisableCaching)
{
_cache = NullCache <TOuterKey, TInnerKey, TValue> .Instance;
}
else
{
if (config.TimeToLive.HasValue)
{
_timeToLive = config.TimeToLive.Value;
}
else
{
_timeToLiveFactory = config.TimeToLiveFactory;
}
_cache = CacheBuilder.Build(config);
_keyComparer = config.KeyComparer ?? EqualityComparer <TInnerKey> .Default;
_skipCacheGetOuterPredicate = config.SkipCacheGetOuterPredicate;
_skipCacheGetInnerPredicate = config.SkipCacheGetInnerPredicate;
_skipCacheSetOuterPredicate = config.SkipCacheSetOuterPredicate;
_skipCacheSetInnerPredicate = config.SkipCacheSetInnerPredicate;
}
if (config.FillMissingKeysConstantValue.IsSet)
{
_shouldFillMissingKeys = true;
_shouldFillMissingKeysWithConstantValue = true;
_fillMissingKeysConstantValue = config.FillMissingKeysConstantValue.Value;
}
else if (!(config.FillMissingKeysValueFactory is null))
{
_shouldFillMissingKeys = true;
_fillMissingKeysValueFactory = config.FillMissingKeysValueFactory;
}
_cacheEnabled = _cache.LocalCacheEnabled || _cache.DistributedCacheEnabled;
_measurementsEnabled = _onSuccessAction != null || _onExceptionAction != null;
}
private protected TConfig WithBatchedFetchesInternal(Func <TParams, ReadOnlyMemory <TKey>, int> maxBatchSizeFactory, BatchBehaviour batchBehaviour)
{
if (maxBatchSizeFactory is null)
{
throw new ArgumentNullException(nameof(maxBatchSizeFactory));
}
_config.MaxBatchSizeFactory = maxBatchSizeFactory;
_config.BatchBehaviour = batchBehaviour;
return((TConfig)this);
}