This is my personal Scala library to which I add useful utilities as I work on projects. I am a newcomer to Scala, so please let me know if I do things which are not idiomatic.
The BufferedTokenizer class extracts text from a stream a chunk at a time, split by a given delimiter. This is most useful for reading a line at a time from a buffered stream. This was inspired by the BufferedTokenizer class included with EventMachine for Ruby.
import net.jcain.util.BufferedTokenizer
val buffer = new BufferedTokenizer
println(buffer.extract("This\nis a\ntest\nof").toList)
println(buffer.extract(" the\nemergency").toList)
println(buffer.extract("\nbroadcast\nsystem\n").toList)produces:
List(This, is a, test)
List(of the)
List(emergency, broadcast, system)
This family of classes provides counters by a fixed interval, where applied increments that are older than the interval are aged out.
The IpAddr class and its subclasses provide IP address manipulation, including CIDR-style range calculations, for both IPv4 and IPv6 addresses. The methods provided were loosely inspired by Ruby's IPAddr class, along with some others I've found useful.
import net.jcain.net.IpAddr
val range = IpAddr("192.168.10.0/24")
val ip = IpAddr("192.168.10.50/32")
println(range)
println(ip)
println(range.contains(ip))
println(range.contains(IpAddr("192.168.11.50/32")))
val v6range = IpAddr("2001:abcd:1234:5678::/64")
println(v6range)
(0 to 2).foreach((_) => println(v6range.random))produces:
192.168.10.0/24
192.168.10.50/32
true
false
2001:abcd:1234:5678:0:0:0:0/64
2001:abcd:1234:5678:1354:1bcc:4e88:bc4/128
2001:abcd:1234:5678:5e05:8c1e:525f:8d6b/128
2001:abcd:1234:5678:9114:ae51:fd44:b040/128
This DNS resolver is an Akka Actor that does DNS resolution of most common resource record types (A, AAAA, CNAME, MX, NS, SOA) and caches the results.
Note: The quick and dirty testing does not stub out the DNS lookups and results in network access. Further, some tests are currently failing because of obsolete names.
This is a simple wrapper around java.net.URI that provides a couple unapply() methods for pattern matching.
This library is licensed under the three-clause BSD license (see LICENSE.txt).