kristofa/brave — pull request #33 by K-Jo (2014-09-02 08:57:01+00:00)
Title: first implementation of span name filters

![screen shot 2014-09-02 at 10 48 05](https://cloud.githubusercontent.com/assets/4069725/4115884/3c349676-327e-11e4-9bef-ed039787fece.png)

When the path contains UUID, or Long values, the list of span names explode, In production we see that cassandra is struggling when a huge amount of different span names needs to be inserted into the database.
I created the possibility to add a filter to the span name creation. For the spring rest-easy you can add them by simply creating a config class in your project. Jersey implementation currently takes no filter. Two filters are implemented: No filter and Filter out numeric values which filters path/ab1234/path into path//path. Of course a custom filter for your application can be made.