Merge pull request #149 from gogiel/configuration

Storage pool size configuration

Author: gogiel

meta_request/README.md

@@ -23,6 +23,18 @@ If you're using [LiveReload](http://livereload.com/) or
 exclude watching your tmp/ folder because meta_request writes a lot of data there
 and your browser will refresh like a madman.
 
+## Configuration
+
+Gem can be configured using block:
+
+```ruby
+MetaRequest.configure do |config|
+  config.storage_pool_size = 30
+end
+```
+
+List of available attributes and defaults can be found in [lib/meta_request/config.rb](lib/meta_request/config.rb).
+
 ## Development
 
 Run tests:

meta_request/lib/meta_request.rb

@@ -1,20 +1,25 @@
 module MetaRequest
   autoload :VERSION,          "meta_request/version"
+  autoload :Config,           "meta_request/config"
   autoload :Event,            "meta_request/event"
   autoload :AppRequest,       "meta_request/app_request"
   autoload :Storage,          "meta_request/storage"
   autoload :Middlewares,      "meta_request/middlewares"
   autoload :LogInterceptor,   "meta_request/log_interceptor"
   autoload :AppNotifications, "meta_request/app_notifications"
 
-  def self.logger
-    @@logger ||= Logger.new(File.join(Rails.root, 'log', 'meta_request.log'))
+  def self.config
+    @config ||= Config.new
+  end
+
+  def self.configure
+    yield config
   end
 
   # stash a frozen copy away so we're not allocating a new string over and over
   # again in AppNotifications and LogInterceptor
   def self.rails_root
-    @@rails_root ||= Rails.root.to_s.freeze
+    @rails_root ||= Rails.root.to_s.freeze
   end
 end
 

meta_request/lib/meta_request/config.rb

@@ -0,0 +1,16 @@
+module MetaRequest
+  class Config
+    attr_accessor :logger, :storage_pool_size
+
+    # logger used for reporting gem's fatal errors
+    def logger
+      @logger ||= Logger.new(File.join(Rails.root, 'log', 'meta_request.log'))
+    end
+
+    # Number of files kept in storage.
+    # Increase when using an application loading many simultaneous requests.
+    def storage_pool_size
+      @storage_pool_size ||= 20
+    end
+  end
+end

meta_request/lib/meta_request/log_interceptor.rb

@@ -43,7 +43,7 @@ def push_event(level, message)
         AppRequest.current.events << Event.new('meta_request.log', 0, 0, 0, payload)
       end
     rescue Exception => e
-      MetaRequest.logger.fatal(e.message + "\n " + e.backtrace.join("\n "))
+      MetaRequest.config.logger.fatal(e.message + "\n " + e.backtrace.join("\n "))
     end
   end
 end

meta_request/lib/meta_request/storage.rb

@@ -9,7 +9,7 @@ def initialize(key)
     def write(value)
       FileUtils.mkdir_p dir_path
       File.open(json_file, 'wb') { |file| file.write(value) }
-      maintain_file_pool(10)
+      maintain_file_pool(MetaRequest.config.storage_pool_size)
     end
 
     def read
@@ -27,7 +27,7 @@ def maintain_file_pool(size)
     end
 
     def file_ctime(file)
-      File.stat(file).ctime.to_i 
+      File.stat(file).ctime.to_i
     rescue Errno::ENOENT
       0
     end