LogAn/lib/rotates.rb

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Ruby
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#!/usr/bin/ruby
require 'sbdb'
require 'uuidtools'
class Rotate
def initialize db, env = db.home, &e
@rdb, @env, @dbs = db, env, {}
self.hash = e || lambda {|k|
[k.timestamp.to_i/60/60/24].pack 'N'
}
end
def hash= e
self.hash &e
end
def hash &e
@hash_func = e if e
@hash_func
end
def hashing k
@hash_func.call k
end
def db_name id
h = hashing id
n = @rdb[ h]
if n
n = UUIDTools::UUID.parse_raw n
else
n = UUIDTools::UUID.timestamp_create
@rdb[ h] = n.raw
info :create => n.to_s
end
n
end
def db n
@env[ n.to_s, :type => SBDB::Btree, :flags => SBDB::CREATE | SBDB::AUTO_COMMIT]
end
def sync
@dbs.each{|n,db|db.sync}
@rdb.sync
end
def close
@dbs.each{|n,db|db.close 0}
@rdb.close 0
end
def put k, v, f = k
id = UUIDTools::UUID.timestamp_create
s = [0x10, v].pack 'Na*'
n = db_name id
db( n)[ id.raw] = s
end
alias emit put
def get k
n = db_name id
db( n)[ id.raw] = s
end
end