client.rb

e = Event.new
e.timestamp = Time.now.to_i
e.category = 'counter.blog'
e.key = ['net', 'kzk9', 'blog', 'tornado']
e.value = 1
p client.Post(e)

counter.conf

<source>
  type counter
  port 1463
</source>

<match counter.**>
  type counter
  mongo_host localhost
  mongo_port 27017
  mongo_database counter
  mongo_collection minutely
</match>

counter.thrift

struct Event
{
  1: i64 timestamp,
  2: string category,
  3: list<string> key,
  4: i64 value
}

enum ResultCode
{
  OK,
  TRY_LATER
}

service Counter
{
  ResultCode Post(1: Event e);
}

gistfile1.txt

mba% mongo
MongoDB shell version: 2.0.0
connecting to: test
> use counter
switched to db counter
> db.minutely.find()
{ "key" : "net", "time" : "201111272327", "value" : 400 }
{ "key" : "net:kzk9", "time" : "201111272327", "value" : 400 }
{ "key" : "net:kzk9:blog", "time" : "201111272327", "value" : 400 }
{ "key" : "net:kzk9:blog:tornado", "time" : "201111272327", "value" : 400 }