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.

BufferedTokenizer

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.

Examples

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)

*IntervalCounter

This family of classes provides counters by a fixed interval, where applied increments that are older than the interval are aged out.

IpAddr

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.

Examples

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

Resolver

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.

URI

This is a simple wrapper around java.net.URI that provides a couple unapply() methods for pattern matching.

License

This library is licensed under the three-clause BSD license (see LICENSE.txt).