X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=lib%2Frbot%2Fdbhash.rb;h=8b128f1b6e618e7ce597cc5b970b0dbd8eca104a;hb=be5d914984e767ce1a718b84d0bad1c88d9f8ea3;hp=5ae2ba87cb0d2d8dd439e8fc59d20906d1f57647;hpb=2a96c9198c1f6e13407d0999083f6ce5e0bc06fa;p=user%2Fhenk%2Fcode%2Fruby%2Frbot.git

diff --git a/lib/rbot/dbhash.rb b/lib/rbot/dbhash.rb
index 5ae2ba87..8b128f1b 100644
--- a/lib/rbot/dbhash.rb
+++ b/lib/rbot/dbhash.rb
@@ -1,37 +1,40 @@
-# Copyright (C) 2002 Tom Gilbert.
+#-- vim:sw=2:et
+#++
 #
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to
-# deal in the Software without restriction, including without limitation the
-# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
-# sell copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies of the Software and its documentation and acknowledgment shall be
-# given in the documentation and software packages that this Software was
-# used.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-# THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+# :title: Berkeley DB interface
 
 begin
   require 'bdb'
+rescue LoadError
+  fatal "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"
 rescue Exception => e
-  puts "Got exception: "+e
-  puts "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"
+  fatal "rbot couldn't load the bdb module: #{e.pretty_inspect}"
+end
+
+if not defined? BDB
   exit 2
 end
 
+if BDB::VERSION_MAJOR < 4
+  fatal "Your bdb (Berkeley DB) version #{BDB::VERSION} is too old!"
+  fatal "rbot will only run with bdb version 4 or higher, please upgrade."
+  fatal "For maximum reliability, upgrade to version 4.2 or higher."
+  raise BDB::Fatal, BDB::VERSION + " is too old"
+end
+
+if BDB::VERSION_MAJOR == 4 and BDB::VERSION_MINOR < 2
+  warning "Your bdb (Berkeley DB) version #{BDB::VERSION} may not be reliable."
+  warning "If possible, try upgrade version 4.2 or later."
+end
+
 # make BTree lookups case insensitive
 module BDB
   class CIBtree < Btree
     def bdb_bt_compare(a, b)
-      a.downcase <=> b.downcase
+      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
@@ -43,24 +46,26 @@ module Irc
   # 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
+      relfilename = @bot.path key
+      relfilename << '.db'
       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)
+      elsif File.exist? relfilename
+        # db already exists, use it
+        @db = DBHash.open_db relfilename
       else
         # create empty db
-        @db = DBHash.create_db(@bot.botclass + "/#{key}.db")
+        @db = DBHash.create_db relfilename
       end
     end
 
@@ -70,42 +75,55 @@ module Irc
 
     def DBHash.create_db(name)
       debug "DBHash: creating empty db #{name}"
-      return BDB::Hash.open(name, nil, 
-                             BDB::CREATE | BDB::EXCL | BDB::TRUNCATE,
-                             0600, "set_pagesize" => 1024,
-                             "set_cachesize" => [(0), (32 * 1024), (0)])
+      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, "set_pagesize" => 1024,
-                             "set_cachesize" => [(0), (32 * 1024), (0)])
+      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.pretty_inspect}. 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
+
+      relfilename = @bot.path key
+      relfilename << '.db'
+
       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")
+      elsif File.exist? relfilename
         # db already exists, use it
-        @db = DBTree.open_db(@bot.botclass + "/#{key}.db")
+        @db = DBTree.open_db relfilename
       else
         # create empty db
-        @db = DBTree.create_db(@bot.botclass + "/#{key}.db")
+        @db = DBTree.create_db relfilename
       end
     end
 
@@ -115,19 +133,72 @@ module Irc
 
     def DBTree.create_db(name)
       debug "DBTree: creating empty db #{name}"
-      return BDB::CIBtree.open(name, nil, 
-                             BDB::CREATE | BDB::EXCL | BDB::TRUNCATE,
-                             0600, "set_pagesize" => 1024,
-                             "set_cachesize" => [(0), (32 * 1024), (0)])
+      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 BDB::CIBtree.open(name, nil, 
-                             "r+", 0600, "set_pagesize" => 1024,
-                             "set_cachesize" => [0, 32 * 1024, 0])
+      return @@env.open_db(BDB::CIBtree, name, nil, "r+", 0600)
+    end
+
+    def DBTree.cleanup_logs()
+      begin
+        debug "DBTree: checkpointing ..."
+        @@env.checkpoint
+      rescue Exception => e
+        debug "Failed: #{e.pretty_inspect}"
+      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 Exception => e
+        debug "Failed: #{e.pretty_inspect}"
+      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 Exception => e
+        error "failed to clean up environment: #{e.pretty_inspect}"
+      end
+    end
+
   end
 
 end