split caching into its own library

ChangeLog

@@ -2,6 +2,7 @@
   * Add SPF record type, same as TXT
   * Emit platform ready on windows (Oleg Elifantiev)
   * Split packet parsing into its own library
+  * Split caching into its own library
 
 2013-03-03  Timothy J Fontaine  <[email protected]>
   * Assert missing fields

README.md

@@ -30,7 +30,7 @@ var question = dns.Question({
   type: 'A',
 });
 
-var start = new Date().getTime();
+var start = Date.now();
 
 var req = dns.Request({
   question: question,
@@ -49,7 +49,7 @@ req.on('message', function (err, answer) {
 });
 
 req.on('end', function () {
-  var delta = (new Date().getTime()) - start;
+  var delta = (Date.now()) - start;
   console.log('Finished processing request: ' + delta.toString() + 'ms');
 });
 
@@ -269,61 +269,3 @@ Available Types:
   - `service` -- string
   - `regexp` -- string
   - `replacement` -- string
-
-Cache
------
-
-If you perform a query on an A or AAAA type and it doesn't exist, the cache
-will attempt to lookup a CNAME and then resolve that.
-
-The constructor takes an optional object with the following properties:
-
- * `store` -- implements the cache store model (optional, default MemoryStore)
-
-Methods:
-
- * `lookup(question, cb)` -- for a given question check the cache store for
-existence
- * `store(packet)` -- iterates over the resource records in a packet and sends
-them to the cache store
- * `purge()` -- clears the cache store of all entries
-
-MemoryStore / Cache store model
--------------------------------
-
-`MemoryStore(opts)` -- An in memory store based on a js object
-
-Methods:
-
- * `get(domain, key, cb)`
-  - `domain` is the holder under which keys will be applied,
-`key` is the subdomain that is being queried for.
-If you `get('example.com', 'www', cb)` you are really asking for `www.example.com`.
-  - `cb(err, results)` -- results is an object of types and array of answers
-   * `{ 1: [{address: '127.0.0.1', ttl: 300, type: 1, class: 1}] }`
- * `set(domain, key, data, cb)`
-  - `domain` is the parent under which this key is stored.
-`key` is the subdomain we are storing, `data` is an object of types with an array of answers.
-   * `set('example.com', 'www', {1: [{class:1, type:1, ttl:300, address:'127.0.0.1'}]}, cb)`
-  - `cb(err, data)` -- cb merely returns the data that was passed.
- * `delete(domain[, key[, type]], cb)` -- delete all from a domain, a domain and key,
-or a domain a key and a type.
-
-Lookup
-------
-
-Is a mechanism that given a store performs the common resolution pattern.
-
-Given `example.com` previous added to a store:
-
-  * `www.example.com CNAME foo.bar.example.com.`
-  * `*.example.com A 127.0.0.1`
-
-A `Lookup(store, 'example.com', {name:'www.example.com', type:1}, cb)`
-will resolve `www` to the CNAME and then search for `foo.bar.example.com` which
-will return no results, and then search for `*.bar.example.com` which will also
-return no results, and ultimately searches for `*.example.com` which will return
-the desired record.
-
-Callback will be called with `(err, results)` where results is an array suitable
-for use in `Packet.answer`

dns.js

@@ -100,12 +100,3 @@ exports.Question = function (opts) {
   return q;
 };
 exports.Request = client.Request;
-
-exports.Cache = require('./lib/cache');
-exports.MemoryStore = require('./lib/memory').MemoryStore;
-
-var utils = require('./lib/utils');
-
-exports.Lookup = utils.Lookup
-exports.is_absolute = utils.is_absolute;
-exports.ensure_absolute = utils.ensure_absolute;

lib/platform.js

@@ -25,7 +25,7 @@ var fs = require('fs'),
     net = require('net'),
     os = require('os'),
     util = require('util'),
-    Cache = require('./cache'),
+    Cache = require('native-dns-cache'),
     consts = require('native-dns-packet').consts,
     path = require('path'),
     utils = require('./utils');
@@ -268,7 +268,7 @@ Platform.prototype._parseHosts = function(hostsfile) {
     });
 
     Object.keys(toStore).forEach(function (key) {
-      self.hosts._store.set(self.hosts._zone, utils.ensure_absolute(key), toStore[key]);
+      self.hosts._store.set(self.hosts._zone, key, toStore[key]);
     });
     self._hostsReady = true;
     self._checkReady();