| public GetShardId ( string path, int shardCount ) : int | ||
| path | string | The path |
| shardCount | int | How many shards are we working with |
| return | int | |
public int GetShardId(string path, int shardCount)
{
if (String.IsNullOrWhiteSpace(path))
throw new ArgumentException(nameof(path) + " cannot be empty", nameof(path));
//no need to calculate anything if there is only one shard
if (shardCount == 1)
{
return 0;
}
return Math.Abs(path.GetHashCode()) % shardCount;
}
} public void Given_the_same_path_twice_it_should_return_the_same_id()
{
var subject = new HashShardingStrategy();
var result = subject.GetShardId("any old string", 4);
var result2 = subject.GetShardId("any old string", 4);
Assert.AreEqual(result, result2);
}