begin require 'bdb' rescue Exception => e error "Got exception: "+e error "rbot couldn't load the bdb module, perhaps you need to install it? try: http://www.ruby-lang.org/en/raa-list.rhtml?name=bdb" exit 2 end # make BTree lookups case insensitive module BDB class CIBtree < Btree def bdb_bt_compare(a, b) if a == nil || b == nil warning "CIBTree: comparing #{a.inspect} (#{self[a].inspect}) with #{b.inspect} (#{self[b].inspect})" end (a||'').downcase <=> (b||'').downcase end end end module Irc # DBHash is for tying a hash to disk (using bdb). # Call it with an identifier, for example "mydata". It'll look for # mydata.db, if it exists, it will load and reference that db. # Otherwise it'll create and empty db called mydata.db class DBHash # absfilename:: use +key+ as an actual filename, don't prepend the bot's # config path and don't append ".db" def initialize(bot, key, absfilename=false) @bot = bot @key = key if absfilename && File.exist?(key) # db already exists, use it @db = DBHash.open_db(key) elsif File.exist?(@bot.botclass + "/#{key}.db") # db already exists, use it @db = DBHash.open_db(@bot.botclass + "/#{key}.db") elsif absfilename # create empty db @db = DBHash.create_db(key) else # create empty db @db = DBHash.create_db(@bot.botclass + "/#{key}.db") end end def method_missing(method, *args, &block) return @db.send(method, *args, &block) end def DBHash.create_db(name) debug "DBHash: creating empty db #{name}" return BDB::Hash.open(name, nil, BDB::CREATE | BDB::EXCL, 0600) end def DBHash.open_db(name) debug "DBHash: opening existing db #{name}" return BDB::Hash.open(name, nil, "r+", 0600) end end # DBTree is a BTree equivalent of DBHash, with case insensitive lookups. class DBTree @@env=nil # TODO: make this customizable # Note that it must be at least four times lg_bsize @@lg_max = 8*1024*1024 # absfilename:: use +key+ as an actual filename, don't prepend the bot's # config path and don't append ".db" def initialize(bot, key, absfilename=false) @bot = bot @key = key if @@env.nil? begin @@env = BDB::Env.open("#{@bot.botclass}", BDB::INIT_TRANSACTION | BDB::CREATE | BDB::RECOVER, "set_lg_max" => @@lg_max) debug "DBTree: environment opened with max log size #{@@env.conf['lg_max']}" rescue => e debug "DBTree: failed to open environment: #{e}. Retrying ..." @@env = BDB::Env.open("#{@bot.botclass}", BDB::INIT_TRANSACTION | BDB::CREATE | BDB::RECOVER) end #@@env = BDB::Env.open("#{@bot.botclass}", BDB::CREATE | BDB::INIT_MPOOL | BDB::RECOVER) end if absfilename && File.exist?(key) # db already exists, use it @db = DBTree.open_db(key) elsif absfilename # create empty db @db = DBTree.create_db(key) elsif File.exist?(@bot.botclass + "/#{key}.db") # db already exists, use it @db = DBTree.open_db(@bot.botclass + "/#{key}.db") else # create empty db @db = DBTree.create_db(@bot.botclass + "/#{key}.db") end end def method_missing(method, *args, &block) return @db.send(method, *args, &block) end def DBTree.create_db(name) debug "DBTree: creating empty db #{name}" return @@env.open_db(BDB::CIBtree, name, nil, BDB::CREATE | BDB::EXCL, 0600) end def DBTree.open_db(name) debug "DBTree: opening existing db #{name}" return @@env.open_db(BDB::CIBtree, name, nil, "r+", 0600) end def DBTree.cleanup_logs() begin debug "DBTree: checkpointing ..." @@env.checkpoint rescue => e debug "Failed: #{e}" end begin debug "DBTree: flushing log ..." @@env.log_flush logs = @@env.log_archive(BDB::ARCH_ABS) debug "DBTree: deleting archivable logs: #{logs.join(', ')}." logs.each { |log| File.delete(log) } rescue => e debug "Failed: #{e}" end end def DBTree.stats() begin debug "General stats:" debug @@env.stat debug "Lock stats:" debug @@env.lock_stat debug "Log stats:" debug @@env.log_stat debug "Txn stats:" debug @@env.txn_stat rescue debug "Couldn't dump stats" end end def DBTree.cleanup_env() begin debug "DBTree: checking transactions ..." has_active_txn = @@env.txn_stat["st_nactive"] > 0 if has_active_txn warning "DBTree: not all transactions completed!" end DBTree.cleanup_logs debug "DBTree: closing environment #{@@env}" path = @@env.home @@env.close @@env = nil if has_active_txn debug "DBTree: keeping file because of incomplete transactions" else debug "DBTree: cleaning up environment in #{path}" BDB::Env.remove("#{path}") end rescue => e error "failed to clean up environment: #{e.inspect}" end end end end