1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | CFPlus::DB - async. database access for cfplus |
3 | CFPlus::DB - async. database and filesystem access for cfplus |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use CFPlus::DB; |
7 | use CFPlus::DB; |
8 | |
8 | |
… | |
… | |
16 | |
16 | |
17 | use strict; |
17 | use strict; |
18 | use utf8; |
18 | use utf8; |
19 | |
19 | |
20 | use Carp (); |
20 | use Carp (); |
21 | use AnyEvent (); |
|
|
22 | use Storable (); # finally |
21 | use Storable (); |
|
|
22 | use Config; |
|
|
23 | use BDB; |
|
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24 | |
|
|
25 | use CFPlus; |
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26 | |
|
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27 | our $DB_HOME = "$Deliantra::VARDIR/cfplus-" . BDB::VERSION . "-$Config{archname}"; |
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28 | |
|
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29 | our $DB_ENV; |
|
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30 | our $DB_STATE; |
|
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31 | our %DB_TABLE; |
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32 | |
|
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33 | sub open_db { |
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34 | mkdir $DB_HOME, 0777; |
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35 | |
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36 | $DB_ENV = db_env_create; |
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37 | |
|
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38 | $DB_ENV->set_errfile (\*STDERR); |
|
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39 | $DB_ENV->set_msgfile (\*STDERR); |
|
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40 | $DB_ENV->set_verbose (-1, 1); |
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41 | |
|
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42 | $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC); |
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43 | $DB_ENV->set_cachesize (0, 2048 * 1024, 0); |
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44 | |
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45 | db_env_open $DB_ENV, $DB_HOME, |
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46 | BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, |
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47 | 0666; |
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48 | |
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49 | $! and die "cannot open database environment $DB_HOME: " . BDB::strerror; |
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50 | |
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51 | 1 |
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52 | } |
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53 | |
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54 | sub table($) { |
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55 | $DB_TABLE{$_[0]} ||= do { |
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56 | my ($table) = @_; |
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57 | |
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58 | $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; |
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59 | |
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60 | my $db = db_create $DB_ENV; |
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61 | $db->set_flags (BDB::CHKSUM); |
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62 | |
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63 | db_open $db, undef, $table, undef, BDB::BTREE, |
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64 | BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666; |
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65 | |
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66 | $! and "unable to open/create database table $_[0]: ". BDB::strerror; |
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67 | |
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68 | $db |
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69 | } |
|
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70 | } |
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71 | |
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72 | ############################################################################# |
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73 | |
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74 | unless (eval { open_db }) { |
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75 | warn "$@";#d# |
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76 | eval { File::Path::rmtree $DB_HOME }; |
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77 | open_db; |
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78 | } |
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79 | |
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80 | our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb; |
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81 | |
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82 | our $SYNC = EV::timer_ns 0, 60, sub { |
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83 | $_[0]->stop; |
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84 | db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { }; |
|
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85 | }; |
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86 | |
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87 | our $tilemap; |
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88 | |
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89 | sub exists($$$) { |
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90 | my ($db, $key, $cb) = @_; |
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91 | |
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92 | my $data; |
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93 | db_get table $db, undef, $key, $data, 0, sub { |
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94 | $cb->($! ? () : length $data); |
|
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95 | }; |
|
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96 | } |
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97 | |
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98 | sub get($$$) { |
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99 | my ($db, $key, $cb) = @_; |
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100 | |
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101 | my $data; |
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102 | db_get table $db, undef, $key, $data, 0, sub { |
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103 | $cb->($! ? () : $data); |
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104 | }; |
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105 | } |
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106 | |
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107 | sub put($$$$) { |
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108 | my ($db, $key, $data, $cb) = @_; |
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109 | |
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110 | db_put table $db, undef, $key, $data, 0, sub { |
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111 | $cb->($!); |
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112 | $SYNC->again unless $SYNC->is_active; |
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113 | }; |
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114 | } |
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115 | |
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116 | sub do_table { |
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117 | my ($db, $cb) = @_; |
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118 | |
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119 | $db = table $db; |
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120 | |
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121 | my $cursor = $db->cursor; |
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122 | my %kv; |
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123 | |
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124 | for (;;) { |
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125 | db_c_get $cursor, my $k, my $v, BDB::NEXT; |
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126 | last if $!; |
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127 | $kv{$k} = $v; |
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128 | } |
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129 | |
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130 | $cb->(\%kv); |
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131 | } |
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132 | |
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133 | sub do_get_tile_id { |
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134 | my ($name, $cb) = @_; |
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135 | |
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136 | my $table = table "facemap"; |
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137 | my $id; |
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138 | |
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139 | db_get $table, undef, $name, $id, 0; |
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140 | return $cb->($id) unless $!; |
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141 | |
|
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142 | for (1..100) { |
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143 | my $txn = $DB_ENV->txn_begin; |
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144 | db_get $table, $txn, id => $id, 0; |
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145 | |
|
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146 | $id = 64 if $id < 64; |
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147 | |
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148 | ++$id; |
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149 | |
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150 | db_put $table, $txn, id => $id, 0; |
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151 | db_txn_finish $txn; |
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152 | |
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153 | $SYNC->again unless $SYNC->is_active; |
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154 | |
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155 | return $cb->($id) unless $!; |
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156 | |
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157 | select undef, undef, undef, 0.01 * rand; |
|
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158 | } |
|
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159 | |
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160 | die "maximum number of transaction retries reached - database problems?"; |
|
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161 | } |
|
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162 | |
|
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163 | sub get_tile_id_sync($) { |
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164 | my ($name) = @_; |
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165 | |
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166 | # fetch the full face table first |
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167 | unless ($tilemap) { |
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168 | do_table facemap => sub { |
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169 | $tilemap = $_[0]; |
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170 | delete $tilemap->{id}; |
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171 | my %maptile = reverse %$tilemap;#d# |
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172 | if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# |
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173 | $tilemap = { };#d# |
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174 | CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# |
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175 | }#d# |
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176 | }; |
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177 | BDB::flush; |
|
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178 | } |
|
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179 | |
|
|
180 | $tilemap->{$name} ||= do { |
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181 | my $id; |
|
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182 | do_get_tile_id $name, sub { |
|
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183 | $id = $_[0]; |
|
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184 | }; |
|
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185 | BDB::flush; |
|
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186 | $id |
|
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187 | } |
|
|
188 | } |
|
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189 | |
|
|
190 | ############################################################################# |
|
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191 | |
|
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192 | sub path_of_res($) { |
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193 | utf8::downgrade $_[0]; # bug in unpack "H*" |
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194 | "$DB_HOME/res-data-" . unpack "H*", $_[0] |
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195 | } |
23 | |
196 | |
24 | sub sync { |
197 | sub sync { |
25 | # for debugging |
198 | # for debugging |
26 | #CFPlus::DB::Server::req (sync => sub { }); |
199 | #CFPlus::DB::Server::req (sync => sub { }); |
27 | CFPlus::DB::Server::sync (); |
200 | CFPlus::DB::Server::sync (); |
28 | } |
201 | } |
29 | |
202 | |
|
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203 | sub unlink($$) { |
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204 | CFPlus::DB::Server::req (unlink => @_); |
|
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205 | } |
|
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206 | |
|
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207 | sub read_file($$) { |
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208 | CFPlus::DB::Server::req (read_file => @_); |
|
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209 | } |
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210 | |
|
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211 | sub write_file($$$) { |
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212 | CFPlus::DB::Server::req (write_file => @_); |
|
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213 | } |
|
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214 | |
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215 | sub prefetch_file($$$) { |
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216 | CFPlus::DB::Server::req (prefetch_file => @_); |
|
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217 | } |
|
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218 | |
30 | sub get($$$) { |
219 | sub logprint($$$) { |
31 | CFPlus::DB::Server::req (get => @_); |
220 | CFPlus::DB::Server::req (logprint => @_); |
32 | } |
|
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33 | |
|
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34 | sub put($$$$) { |
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35 | CFPlus::DB::Server::req (put => @_); |
|
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36 | } |
|
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37 | |
|
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38 | our $tilemap; |
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39 | |
|
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40 | sub get_tile_id_sync($) { |
|
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41 | my ($hash) = @_; |
|
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42 | |
|
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43 | # fetch the full face table first |
|
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44 | unless ($tilemap) { |
|
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45 | CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); |
|
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46 | sync; |
|
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47 | } |
|
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48 | |
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49 | $tilemap->{$hash} ||= do { |
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50 | my $id; |
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51 | CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] }); |
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52 | sync; |
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53 | $id |
|
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54 | } |
|
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55 | } |
221 | } |
56 | |
222 | |
57 | package CFPlus::DB::Server; |
223 | package CFPlus::DB::Server; |
58 | |
224 | |
59 | use strict; |
225 | use strict; |
60 | |
226 | |
|
|
227 | use EV (); |
61 | use Fcntl; |
228 | use Fcntl; |
62 | use BerkeleyDB; |
|
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63 | |
|
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64 | our $DB_HOME = "$Crossfire::VARDIR/cfplus"; |
|
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65 | our $DB_ENV; |
|
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66 | our $DB_STATE; |
|
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67 | our %DB_TABLE; |
|
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68 | |
|
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69 | sub open_db { |
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70 | mkdir $DB_HOME, 0777; |
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71 | my $recover = $BerkeleyDB::db_version >= 4.4 |
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72 | ? eval "DB_REGISTER | DB_RECOVER" |
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73 | : 0; |
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74 | |
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75 | $DB_ENV = new BerkeleyDB::Env |
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76 | -Home => $DB_HOME, |
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77 | -Cachesize => 8_000_000, |
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78 | -ErrFile => "$DB_HOME/errorlog.txt", |
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79 | # -ErrPrefix => "DATABASE", |
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80 | -Verbose => 1, |
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81 | -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover, |
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82 | -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE, |
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83 | or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error"; |
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84 | |
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85 | 1 |
|
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86 | } |
|
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87 | |
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88 | sub table($) { |
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89 | $DB_TABLE{$_[0]} ||= do { |
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90 | my ($table) = @_; |
|
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91 | |
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92 | $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; |
|
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93 | |
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94 | new BerkeleyDB::Btree |
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95 | -Env => $DB_ENV, |
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96 | -Filename => $table, |
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97 | # -Filename => "database", |
|
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98 | # -Subname => $table, |
|
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99 | -Property => DB_CHKSUM, |
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100 | -Flags => DB_CREATE | DB_UPGRADE, |
|
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101 | or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" |
|
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102 | } |
|
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103 | } |
|
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104 | |
|
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105 | our $SYNC_INTERVAL = 6; |
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106 | |
229 | |
107 | our %CB; |
230 | our %CB; |
108 | our $FH; |
231 | our $FH; |
109 | our $ID = "aaa0"; |
232 | our $ID = "aaa0"; |
110 | our ($fh_r_watcher, $fh_w_watcher); |
233 | our ($fh_r_watcher, $fh_w_watcher); |
… | |
… | |
115 | sub fh_write { |
238 | sub fh_write { |
116 | my $len = syswrite $FH, $write_buf; |
239 | my $len = syswrite $FH, $write_buf; |
117 | |
240 | |
118 | substr $write_buf, 0, $len, ""; |
241 | substr $write_buf, 0, $len, ""; |
119 | |
242 | |
120 | undef $fh_w_watcher |
243 | $fh_w_watcher->stop |
121 | unless length $write_buf; |
244 | unless length $write_buf; |
122 | } |
245 | } |
123 | |
246 | |
124 | sub fh_read { |
247 | sub fh_read { |
125 | my $status = sysread $FH, $read_buf, 16384, length $read_buf; |
248 | my $status = sysread $FH, $read_buf, 16384, length $read_buf; |
… | |
… | |
161 | |
284 | |
162 | my $id = ++$ID; |
285 | my $id = ++$ID; |
163 | $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
286 | $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
164 | $CB{$id} = $cb; |
287 | $CB{$id} = $cb; |
165 | |
288 | |
166 | $fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write); |
289 | $fh_w_watcher->start; |
167 | } |
290 | } |
168 | |
291 | |
169 | sub sync_tick { |
292 | sub do_unlink { |
170 | req "sync", sub { }; |
293 | unlink $_[0]; |
171 | $sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick); |
|
|
172 | } |
294 | } |
173 | |
295 | |
174 | sub do_sync { |
|
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175 | $DB_ENV->txn_checkpoint (0, 0, 0); |
|
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176 | () |
|
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177 | } |
|
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178 | |
|
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179 | sub do_get { |
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180 | my ($db, $key) = @_; |
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181 | |
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182 | my $data; |
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183 | (table $db)->db_get ($key, $data) == 0 |
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184 | ? $data |
|
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185 | : () |
|
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186 | } |
|
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187 | |
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188 | sub do_put { |
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189 | my ($db, $key, $data) = @_; |
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190 | |
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191 | (table $db)->db_put ($key => $data) |
|
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192 | } |
|
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193 | |
|
|
194 | sub do_table { |
296 | sub do_read_file { |
195 | my ($db) = @_; |
|
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196 | |
|
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197 | $db = table $db; |
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198 | |
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199 | my $cursor = $db->db_cursor; |
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200 | my %kv; |
|
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201 | my ($k, $v); |
|
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202 | $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0; |
|
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203 | |
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204 | \%kv |
|
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205 | } |
|
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206 | |
|
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207 | sub do_get_tile_id { |
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208 | my ($hash) = @_; |
297 | my ($path) = @_; |
209 | |
298 | |
210 | my $id; |
299 | utf8::downgrade $path; |
211 | my $table = table "facemap"; |
300 | open my $fh, "<:raw", $path |
|
|
301 | or return; |
|
|
302 | sysread $fh, my $buf, -s $fh; |
212 | |
303 | |
213 | return $id |
304 | $buf |
214 | if $table->db_get ($hash, $id) == 0; |
305 | } |
215 | |
306 | |
216 | for (1..100) { |
307 | sub do_write_file { |
217 | my $txn = $DB_ENV->txn_begin; |
308 | my ($path, $data) = @_; |
218 | my $status = $table->db_get (id => $id); |
|
|
219 | if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) { |
|
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220 | $id = ($id || 64) + 1; |
|
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221 | if ($table->db_put (id => $id) == 0 |
|
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222 | && $table->db_put ($hash => $id) == 0) { |
|
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223 | $txn->txn_commit; |
|
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224 | |
309 | |
225 | return $id; |
310 | utf8::downgrade $path; |
226 | } |
311 | utf8::downgrade $data; |
|
|
312 | open my $fh, ">:raw", $path |
|
|
313 | or return; |
|
|
314 | syswrite $fh, $data; |
|
|
315 | close $fh; |
|
|
316 | |
|
|
317 | 1 |
|
|
318 | } |
|
|
319 | |
|
|
320 | sub do_prefetch_file { |
|
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321 | my ($path, $size) = @_; |
|
|
322 | |
|
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323 | utf8::downgrade $path; |
|
|
324 | open my $fh, "<:raw", $path |
|
|
325 | or return; |
|
|
326 | sysread $fh, my $buf, $size; |
|
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327 | |
|
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328 | 1 |
|
|
329 | } |
|
|
330 | |
|
|
331 | our %LOG_FH; |
|
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332 | |
|
|
333 | sub do_logprint { |
|
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334 | my ($path, $line) = @_; |
|
|
335 | |
|
|
336 | $LOG_FH{$path} ||= do { |
|
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337 | open my $fh, ">>:utf8", $path |
|
|
338 | or warn "Couldn't open logfile $path: $!"; |
|
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339 | |
|
|
340 | $fh->autoflush (1); |
|
|
341 | |
227 | } |
342 | $fh |
228 | $txn->txn_abort; |
|
|
229 | } |
343 | }; |
230 | |
344 | |
231 | die "maximum number of transaction retries reached - database problems?"; |
345 | my ($sec, $min, $hour, $mday, $mon, $year) = localtime time; |
|
|
346 | |
|
|
347 | my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d", |
|
|
348 | $year + 1900, $mon + 1, $mday, $hour, $min, $sec; |
|
|
349 | |
|
|
350 | print { $LOG_FH{$path} } "$ts $line\n" |
232 | } |
351 | } |
233 | |
352 | |
234 | sub run { |
353 | sub run { |
235 | ($FH, my $fh) = CFPlus::socketpipe; |
354 | ($FH, my $fh) = CFPlus::socketpipe; |
236 | |
355 | |
… | |
… | |
238 | my $oldfh = select $fh; $| = 1; select $oldfh; |
357 | my $oldfh = select $fh; $| = 1; select $oldfh; |
239 | |
358 | |
240 | my $pid = fork; |
359 | my $pid = fork; |
241 | |
360 | |
242 | if (defined $pid && !$pid) { |
361 | if (defined $pid && !$pid) { |
|
|
362 | local $SIG{QUIT}; |
243 | local $SIG{__DIE__}; |
363 | local $SIG{__DIE__}; |
|
|
364 | local $SIG{__WARN__}; |
244 | eval { |
365 | eval { |
245 | close $FH; |
366 | close $FH; |
246 | |
|
|
247 | unless (eval { open_db }) { |
|
|
248 | File::Path::rmtree $DB_HOME; |
|
|
249 | open_db; |
|
|
250 | } |
|
|
251 | |
367 | |
252 | while () { |
368 | while () { |
253 | 4 == read $fh, my $len, 4 |
369 | 4 == read $fh, my $len, 4 |
254 | or last; |
370 | or last; |
255 | $len = unpack "N", $len; |
371 | $len = unpack "N", $len; |
… | |
… | |
261 | my ($id, $type, @args) = @$req; |
377 | my ($id, $type, @args) = @$req; |
262 | my $cb = CFPlus::DB::Server->can ("do_$type") |
378 | my $cb = CFPlus::DB::Server->can ("do_$type") |
263 | or die "$type: unknown database request type\n"; |
379 | or die "$type: unknown database request type\n"; |
264 | my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
380 | my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
265 | (syswrite $fh, $res) == length $res |
381 | (syswrite $fh, $res) == length $res |
266 | or die; |
382 | or die "DB::write: $!"; |
267 | } |
383 | } |
268 | }; |
384 | }; |
269 | |
385 | |
270 | my $error = $@; |
386 | my $error = $@; |
271 | |
387 | |
272 | eval { |
388 | eval { |
273 | undef %DB_TABLE; |
|
|
274 | undef $DB_ENV; |
|
|
275 | |
|
|
276 | Storable::store_fd [die => $error], $fh; |
389 | Storable::store_fd [die => $error], $fh; |
277 | }; |
390 | }; |
278 | |
391 | |
|
|
392 | warn $error |
|
|
393 | if $error; |
|
|
394 | |
279 | CFPlus::_exit 0; |
395 | CFPlus::_exit 0; |
280 | } |
396 | } |
281 | |
397 | |
282 | close $fh; |
398 | close $fh; |
283 | fcntl $FH, F_SETFL, O_NONBLOCK; |
399 | CFPlus::fh_nonblocking $FH, 1; |
284 | |
400 | |
285 | $CB{die} = sub { |
401 | $CB{die} = sub { die shift }; |
286 | die shift; |
|
|
287 | }; |
|
|
288 | |
402 | |
289 | $fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read); |
403 | $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; |
|
|
404 | $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; |
|
|
405 | } |
290 | |
406 | |
291 | sync_tick; |
407 | sub stop { |
|
|
408 | close $FH; |
292 | } |
409 | } |
293 | |
410 | |
294 | 1; |
411 | 1; |
295 | |
412 | |
296 | =back |
413 | =back |