public void Run(string uri)
{
// Declaration of all the pipeline blocks
GetTopStoriesBlock getTopStories = new GetTopStoriesBlock();
FilterTopStoriesBlock filterTopStories = new FilterTopStoriesBlock();
TraverseTopStoriesCommentsBlock traverseTopStoriesComments = new TraverseTopStoriesCommentsBlock();
ComputeTopCommentsPerStoryBlock computeTopCommentsPerStory = new ComputeTopCommentsPerStoryBlock();
// Links and interactions betwen each block
getTopStories.block.LinkTo(filterTopStories.block, this.linkOptions);
filterTopStories.bufferBlock.LinkTo(traverseTopStoriesComments.block, linkOptions);
traverseTopStoriesComments.bufferBlock.LinkTo(computeTopCommentsPerStory.block, linkOptions);
// Triggering the start of the pipeline
getTopStories.block.Post(uri);
getTopStories.block.Complete();
// Buffer at the end of the pipeline
var receiveAllStories = Task.Run(() =>
{
for (int i = 0; i <= Constants.NBSTORIES; i++)
{
this.topStories.Add(computeTopCommentsPerStory.bufferBlock.Receive()); // Wait for all the Top Story objects to arrive
}
});
Task.WaitAll(receiveAllStories);
computeTopCommentsPerStory.bufferBlock.Complete(); //End of the pipeline
commentsRegistry = traverseTopStoriesComments.commentsRegistry;
printResults();
}
public void ComputeTopCommentsPerStoryBlock()
{
ConcurrentDictionary <string, int> comments = new ConcurrentDictionary <string, int>();
comments.TryAdd("a", 1);
comments.TryAdd("b", 2);
comments.TryAdd("c", 3);
comments.TryAdd("d", 4);
comments.TryAdd("e", 5);
comments.TryAdd("f", 6);
comments.TryAdd("g", 7);
comments.TryAdd("h", 8);
comments.TryAdd("i", 9);
comments.TryAdd("j", 10);
comments.TryAdd("k", 11);
comments.TryAdd("l", 12);
TopStory topStory = new TopStory("US takes 'richest nation on earth' crown from Switzerland", comments);
ComputeTopCommentsPerStoryBlock traverseTopStoriesComments = new ComputeTopCommentsPerStoryBlock();
traverseTopStoriesComments.block.Post(topStory);
var topStoryWithTopComments = traverseTopStoriesComments.bufferBlock.ReceiveAsync().Result;
Assert.IsNotNull(topStoryWithTopComments.TopComments);
Assert.AreEqual(topStoryWithTopComments.TopComments.Count, Constants.NBOFCOMMENTERS);
}
