private void process(Job job)
{
void count(string word)
{
if (!job.Cache.TryGetValue(word, out var counter)) // get from job cache (accessed within a single thread)
{
counter = _counters.putIfAbsent(word, // get from global map (create new one if not exists)
new Counter {
Word = word
});
job.Cache.Add(word, counter); // store in job thread cache
}
Interlocked.Increment(ref counter.Value);
}
try
{
var lines = File.ReadLines(job.Path); // lazy evaluated line iterator
foreach (var line in lines)
{
if (line.IsEmpty())
{
continue;
}
var words = line.ToLower().Split(' '); // split to case insensitive words
foreach (var word in words)
{
if (word == "")
{
continue;
}
count(word);
}
}
}
finally
{
job.Signal.Set();
}
}
Value IConcurrentMap <Key, Value> .putIfAbsent(Key key, Value value)
{
lock (_mutex) return(_.putIfAbsent(key, value));
}