added user test, basic user methods

lib/cache.rb

@@ -0,0 +1,92 @@
+module Cache
+  def expire(options = {})
+    tags = options[:tags]
+    cache_version = Cache.get("$cache_version").to_i
+
+    Cache.put("$cache_version", cache_version + 1)
+
+    if tags
+      tags.scan(/\S+/).each do |x|
+        key = "tag:#{x}"
+        key_version = Cache.get(key).to_i
+        Cache.put(key, key_version + 1)
+      end
+    end
+  end
+    
+  def incr(key)
+    val = Cache.get(key)
+    Cache.put(key, val.to_i + 1)
+    ActiveRecord::Base.logger.debug('MemCache Incr %s' % [key])
+  end
+  
+  def get(key, expiry = 0)
+    key.gsub!(/\s/, "_")
+    key = key[0, 200]
+    
+    if block_given?
+      return yield
+    else
+      return nil
+    end
+    
+    begin
+      start_time = Time.now
+      value = MEMCACHE.get key
+      elapsed = Time.now - start_time
+      ActiveRecord::Base.logger.debug('MemCache Get (%0.6f)  %s' % [elapsed, key])
+      if value.nil? and block_given? then
+        value = yield
+        MEMCACHE.set key, value, expiry
+      end
+      value
+    rescue MemCache::MemCacheError => err
+      ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
+      if block_given? then
+        value = yield
+        put key, value, expiry
+      end
+      value
+    end
+  end
+  
+  def put(key, value, expiry = 0)
+    key.gsub!(/\s/, "_")
+    key = key[0, 200]
+    
+    begin
+      start_time = Time.now
+      MEMCACHE.set key, value, expiry
+      elapsed = Time.now - start_time
+      ActiveRecord::Base.logger.debug('MemCache Set (%0.6f)  %s' % [elapsed, key])
+      value
+    rescue MemCache::MemCacheError => err
+      ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
+      nil
+    end
+  end
+  
+  def delete(key, delay = nil)
+    begin
+      start_time = Time.now
+      MEMCACHE.delete key, delay
+      elapsed = Time.now - start_time
+      ActiveRecord::Base.logger.debug('MemCache Delete (%0.6f)  %s' % [elapsed, key])
+      nil
+    rescue MemCache::MemCacheError => err
+      ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
+      nil
+    end
+  end
+  
+  def sanitize_key(key)
+    key.gsub(/\W/, "_").slice(0, 220)
+  end
+  
+  module_function :get
+  module_function :expire
+  module_function :incr
+  module_function :put
+  module_function :delete
+  module_function :sanitize_key
+end