public void TestCaptureOrder()
{
// post source ints
var intSource = new BufferBlock <int>();
intSource.Post(1);
intSource.Post(2);
intSource.Post(99);
intSource.Post(98);
intSource.Complete();
// capture source order
var orderedInts = OrderingBlock.CaptureOrder <int, long, long>(
intSource, intValue => (long)intValue);
// post longs to combine, in reverse of original order
var longSource = new BufferBlock <long>();
longSource.Post(99);
longSource.Post(98);
longSource.Post(2);
longSource.Post(1);
longSource.Complete();
// apply source order
var orderedLongs = orderedInts.ApplyOrder(longSource, longValue => longValue);
// verify the original order was preserved
CollectionAssert.AreEqual(new long[] { 1, 2, 99, 98 }, orderedLongs.ToEnumerable().ToList());
}
public static ISourceBlock <DecodedBlockTx> LookAhead(ISourceBlock <DecodedBlockTx> blockTxes, IDeferredChainStateCursor deferredChainStateCursor, CancellationToken cancelToken = default(CancellationToken))
{
// capture the original block txes order
var orderedBlockTxes = OrderingBlock.CaptureOrder <DecodedBlockTx, DecodedBlockTx, int>(
blockTxes, blockTx => blockTx.Index, cancelToken);
// queue each utxo entry to be warmed up: each input's previous transaction, and each new transaction
var queueUnspentTxLookup = InitQueueUnspentTxLookup(cancelToken);
orderedBlockTxes.LinkTo(queueUnspentTxLookup, new DataflowLinkOptions {
PropagateCompletion = true
});
// warm up each uxto entry
var warmupUtxo = InitWarmupUtxo(deferredChainStateCursor, cancelToken);
queueUnspentTxLookup.LinkTo(warmupUtxo, new DataflowLinkOptions {
PropagateCompletion = true
});
// return the block txes with warmed utxo entries in original order
return(orderedBlockTxes.ApplyOrder(warmupUtxo, blockTx => blockTx.Index, cancelToken));
}