Missing files for caching

config/init.rb

@@ -24,12 +24,6 @@
   # c[:session_id_key] = '_session_id' # cookie session id key, defaults to "_session_id"
 end
 
-dependency "merb-cache" do 
-  Merb::Cache.setup do
-    register(Merb::Cache::ActionStore[Merb::Cache::FileStore])
-  end
-end
-
 Merb::BootLoader.before_app_loads do
   Merb.push_path(:merb_extensions, Merb.root / "merb/extensions", "**/*.rb")  
   Merb.push_path(:lib_wikipedia, Merb.root / "lib" / "wikipedia", "**/*.rb")
@@ -43,16 +37,10 @@
     Device.available_formats = YAML::load(open("config/formats.yaml"))
   rescue Exception => e
     puts "There appears to be a syntax error in your YAML configuration files."
-    raise
     exit
   end
 end
 
-#Merb::Plugins.config[:merb_cache] = {
-#  :store => "memory"
-#}
-
-
 # Add our mime-types for device based content type negotiation
 %w[webkit_native webkit wml].each do |type|
   Merb.add_mime_type(:"#{type}", :to_html, %w[text/html])

lib/cache.rb

@@ -0,0 +1,28 @@
+# Simple cache for in memory caching of rendered pages
+
+class Cache
+  @@_cache= {}
+
+  def self.read(key)
+    return unless @@_cache[key]
+    if @@_cache[key][:expires].nil? || @@_cache[key][:expires]>Time.now
+      @@_cache[key][:data]
+    else
+      self.expire(key)
+    end
+  end
+
+  def self.write(key, data, options={})
+    @@_cache[key] ||= {}
+    @@_cache[key][:expires]= options[:expires]
+    @@_cache[key][:data]= data
+  end
+
+  def self.expire(key)
+    @@_cache[key]= nil
+  end
+
+  def self.dump
+    puts @@_cache.keys.map{|key| [key, @@_cache[key][:expires], @@_cache[key][:data][0..100]]}.inspect
+  end
+end

spec/lib/cache_spec.rb

@@ -0,0 +1,25 @@
+require File.join(File.dirname(__FILE__), '..', 'spec_helper.rb')
+
+describe Cache do
+
+  it "should cache a value" do
+    Cache.read(:key).should be_nil
+    data="Little thing in cache"
+    Cache.write(:key, data)
+    Cache.read(:key).should ==data
+  end
+
+  it "should expire a cached value" do
+    Cache.expire(:key)
+    Cache.read(:key).should be_nil
+  end
+
+  it "should expire a cached value after a certain time" do
+    data="Little thing in cache"
+    Cache.write(:key, data, :expires=>Time.now+2) #seconds
+    Cache.read(:key).should ==data
+    sleep 2
+    Cache.read(:key).should be_nil
+  end
+end
+