public long TargetChainHeight()
{
var lastEnqueuedBlockCacheEntity = BlockCacheEntities.LastOrDefault();
if (lastEnqueuedBlockCacheEntity != null)
{
return(lastEnqueuedBlockCacheEntity.Height + 1);
}
var lastDequeuedBlockCacheEntity = DequeuedBlockCacheEntities.LastOrDefault();
if (lastDequeuedBlockCacheEntity != null)
{
return(lastDequeuedBlockCacheEntity.Height + 1);
}
return(_initTargetHeight);
}
public long TargetChainHeight()
{
if (BlockCacheEntities.Count >= CrossChainConstants.ChainCacheEntityCapacity)
{
return(-1);
}
var lastEnqueuedBlockCacheEntity = BlockCacheEntities.LastOrDefault();
if (lastEnqueuedBlockCacheEntity != null)
{
return(lastEnqueuedBlockCacheEntity.Height + 1);
}
var lastDequeuedBlockCacheEntity = DequeuedBlockCacheEntities.LastOrDefault();
if (lastDequeuedBlockCacheEntity != null)
{
return(lastDequeuedBlockCacheEntity.Height + 1);
}
return(_targetHeight);
}
/// <summary>
/// Try take element from cached queue.
/// Make sure that more than <see cref="CrossChainConstants.MinimalBlockCacheEntityCount"/> block cache entities are left in <see cref="BlockCacheEntities"/>.
/// </summary>
/// <param name="height">Height of block info needed</param>
/// <param name="blockCacheEntity"></param>
/// <param name="isCacheSizeLimited">Use <see cref="CrossChainConstants.ChainCacheEntityCapacity"/> as cache count threshold if true.</param>
/// <returns></returns>
public bool TryTake(long height, out IBlockCacheEntity blockCacheEntity, bool isCacheSizeLimited)
{
// clear outdated data
var cachedInQueue = DequeueBlockCacheEntitiesBeforeHeight(height);
// isCacheSizeLimited means minimal caching size limit, so that most nodes have this block.
var lastQueuedHeight = BlockCacheEntities.LastOrDefault()?.Height ?? 0;
if (cachedInQueue && !(isCacheSizeLimited && lastQueuedHeight < height + CrossChainConstants.MinimalBlockCacheEntityCount))
{
return(TryDequeue(out blockCacheEntity));
}
blockCacheEntity = GetLastDequeuedBlockCacheEntity(height);
if (blockCacheEntity != null)
{
return(!isCacheSizeLimited ||
BlockCacheEntities.Count + DequeuedBlockCacheEntities.Count(ci => ci.Height >= height)
>= CrossChainConstants.MinimalBlockCacheEntityCount);
}
return(false);
}