t/93storage_replication.t

   1 use strict;
   2 use warnings;
   3 use lib qw(t/lib);
   4 use Test::More;
   5 use Test::Exception;
   6 use DBICTest;
   7 use List::Util 'first';
   8
   9 BEGIN {
  10     eval "use DBIx::Class::Storage::DBI::Replicated; use Test::Moose";
  11     plan $@
  12         ? ( skip_all => "Deps not installed: $@" )
  13         : ( tests => 79 );
  14 }
  15
  16 use_ok 'DBIx::Class::Storage::DBI::Replicated::Pool';
  17 use_ok 'DBIx::Class::Storage::DBI::Replicated::Balancer';
  18 use_ok 'DBIx::Class::Storage::DBI::Replicated::Replicant';
  19 use_ok 'DBIx::Class::Storage::DBI::Replicated';
  20
  21 =head1 HOW TO USE
  22
  23     This is a test of the replicated storage system.  This will work in one of
  24     two ways, either it was try to fake replication with a couple of SQLite DBs
  25     and creative use of copy, or if you define a couple of %ENV vars correctly
  26     will try to test those.  If you do that, it will assume the setup is properly
  27     replicating.  Your results may vary, but I have demonstrated this to work with
  28     mysql native replication.
  29
  30 =cut
  31
  32
  33 ## ----------------------------------------------------------------------------
  34 ## Build a class to hold all our required testing data and methods.
  35 ## ----------------------------------------------------------------------------
  36
  37 TESTSCHEMACLASSES: {
  38
  39     ## --------------------------------------------------------------------- ##
  40     ## Create an object to contain your replicated stuff.
  41     ## --------------------------------------------------------------------- ##
  42
  43     package DBIx::Class::DBI::Replicated::TestReplication;
  44
  45     use DBICTest;
  46     use base qw/Class::Accessor::Fast/;
  47
  48     __PACKAGE__->mk_accessors( qw/schema/ );
  49
  50     ## Initialize the object
  51
  52         sub new {
  53             my $class = shift @_;
  54             my $self = $class->SUPER::new(@_);
  55
  56             $self->schema( $self->init_schema );
  57             return $self;
  58         }
  59
  60     ## Get the Schema and set the replication storage type
  61
  62     sub init_schema {
  63         # current SQLT SQLite producer does not handle DROP TABLE IF EXISTS, trap warnings here
  64         local $SIG{__WARN__} = sub { warn @_ unless $_[0] =~ /no such table.+DROP TABLE/ };
  65
  66         my $class = shift @_;
  67
  68         my $schema = DBICTest->init_schema(
  69             sqlite_use_file => 1,
  70             storage_type=>{
  71                 '::DBI::Replicated' => {
  72                         balancer_type=>'::Random',
  73                     balancer_args=>{
  74                         auto_validate_every=>100,
  75                     },
  76                 }
  77             },
  78             deploy_args=>{
  79                    add_drop_table => 1,
  80             },
  81         );
  82
  83         return $schema;
  84     }
  85
  86     sub generate_replicant_connect_info {}
  87     sub replicate {}
  88     sub cleanup {}
  89
  90
  91     ## --------------------------------------------------------------------- ##
  92     ## Subclass for when you are using SQLite for testing, this provides a fake
  93     ## replication support.
  94     ## --------------------------------------------------------------------- ##
  95
  96     package DBIx::Class::DBI::Replicated::TestReplication::SQLite;
  97
  98     use DBICTest;
  99     use File::Copy;
 100     use base 'DBIx::Class::DBI::Replicated::TestReplication';
 101
 102     __PACKAGE__->mk_accessors( qw/master_path slave_paths/ );
 103
 104     ## Set the mastep path from DBICTest
 105
 106         sub new {
 107             my $class = shift @_;
 108             my $self = $class->SUPER::new(@_);
 109
 110             $self->master_path( DBICTest->_sqlite_dbfilename );
 111             $self->slave_paths([
 112             "t/var/DBIxClass_slave1.db",
 113             "t/var/DBIxClass_slave2.db",
 114         ]);
 115
 116             return $self;
 117         }
 118
 119     ## Return an Array of ArrayRefs where each ArrayRef is suitable to use for
 120     ## $storage->connect_info to be used for connecting replicants.
 121
 122     sub generate_replicant_connect_info {
 123         my $self = shift @_;
 124         my @dsn = map {
 125             "dbi:SQLite:${_}";
 126         } @{$self->slave_paths};
 127
 128         my @connect_infos = map { [$_,'','',{AutoCommit=>1}] } @dsn;
 129
 130     # try a hashref too
 131         my $c = $connect_infos[0];
 132         $connect_infos[0] = {
 133           dsn => $c->[0],
 134           user => $c->[1],
 135           password => $c->[2],
 136           %{ $c->[3] }
 137         };
 138
 139         @connect_infos
 140     }
 141
 142     ## Do a 'good enough' replication by copying the master dbfile over each of
 143     ## the slave dbfiles.  If the master is SQLite we do this, otherwise we
 144     ## just do a one second pause to let the slaves catch up.
 145
 146     sub replicate {
 147         my $self = shift @_;
 148         foreach my $slave (@{$self->slave_paths}) {
 149             copy($self->master_path, $slave);
 150         }
 151     }
 152
 153     ## Cleanup after ourselves.  Unlink all gthe slave paths.
 154
 155     sub cleanup {
 156         my $self = shift @_;
 157         foreach my $slave (@{$self->slave_paths}) {
 158             unlink $slave;
 159         }
 160     }
 161
 162     ## --------------------------------------------------------------------- ##
 163     ## Subclass for when you are setting the databases via custom export vars
 164     ## This is for when you have a replicating database setup that you are
 165     ## going to test against.  You'll need to define the correct $ENV and have
 166     ## two slave databases to test against, as well as a replication system
 167     ## that will replicate in less than 1 second.
 168     ## --------------------------------------------------------------------- ##
 169
 170     package DBIx::Class::DBI::Replicated::TestReplication::Custom;
 171     use base 'DBIx::Class::DBI::Replicated::TestReplication';
 172
 173     ## Return an Array of ArrayRefs where each ArrayRef is suitable to use for
 174     ## $storage->connect_info to be used for connecting replicants.
 175
 176     sub generate_replicant_connect_info {
 177         return (
 178             [$ENV{"DBICTEST_SLAVE0_DSN"}, $ENV{"DBICTEST_SLAVE0_DBUSER"}, $ENV{"DBICTEST_SLAVE0_DBPASS"}, {AutoCommit => 1}],
 179             [$ENV{"DBICTEST_SLAVE1_DSN"}, $ENV{"DBICTEST_SLAVE1_DBUSER"}, $ENV{"DBICTEST_SLAVE1_DBPASS"}, {AutoCommit => 1}],
 180         );
 181     }
 182
 183     ## pause a bit to let the replication catch up
 184
 185     sub replicate {
 186         sleep 1;
 187     }
 188 }
 189
 190 ## ----------------------------------------------------------------------------
 191 ## Create an object and run some tests
 192 ## ----------------------------------------------------------------------------
 193
 194 ## Thi first bunch of tests are basic, just make sure all the bits are behaving
 195
 196 my $replicated_class = DBICTest->has_custom_dsn ?
 197     'DBIx::Class::DBI::Replicated::TestReplication::Custom' :
 198     'DBIx::Class::DBI::Replicated::TestReplication::SQLite';
 199
 200 ok my $replicated = $replicated_class->new
 201     => 'Created a replication object';
 202
 203 isa_ok $replicated->schema
 204     => 'DBIx::Class::Schema';
 205
 206 isa_ok $replicated->schema->storage
 207     => 'DBIx::Class::Storage::DBI::Replicated';
 208
 209 ok $replicated->schema->storage->meta
 210     => 'has a meta object';
 211
 212 isa_ok $replicated->schema->storage->master
 213     => 'DBIx::Class::Storage::DBI';
 214
 215 isa_ok $replicated->schema->storage->pool
 216     => 'DBIx::Class::Storage::DBI::Replicated::Pool';
 217
 218 does_ok $replicated->schema->storage->balancer
 219     => 'DBIx::Class::Storage::DBI::Replicated::Balancer';
 220
 221 ok my @replicant_connects = $replicated->generate_replicant_connect_info
 222     => 'got replication connect information';
 223
 224 ok my @replicated_storages = $replicated->schema->storage->connect_replicants(@replicant_connects)
 225     => 'Created some storages suitable for replicants';
 226
 227 my @replicant_names = keys %{ $replicated->schema->storage->replicants };
 228
 229 ## Silence warning about not supporting the is_replicating method if using the
 230 ## sqlite dbs.
 231 $replicated->schema->storage->debugobj->silence(1)
 232   if first { m{^t/} } @replicant_names;
 233
 234 isa_ok $replicated->schema->storage->balancer->current_replicant
 235     => 'DBIx::Class::Storage::DBI';
 236
 237 $replicated->schema->storage->debugobj->silence(0);
 238
 239 ok $replicated->schema->storage->pool->has_replicants
 240     => 'does have replicants';
 241
 242 is $replicated->schema->storage->pool->num_replicants => 2
 243     => 'has two replicants';
 244
 245 does_ok $replicated_storages[0]
 246     => 'DBIx::Class::Storage::DBI::Replicated::Replicant';
 247
 248 does_ok $replicated_storages[1]
 249     => 'DBIx::Class::Storage::DBI::Replicated::Replicant';
 250
 251 does_ok $replicated->schema->storage->replicants->{$replicant_names[0]}
 252     => 'DBIx::Class::Storage::DBI::Replicated::Replicant';
 253
 254 does_ok $replicated->schema->storage->replicants->{$replicant_names[1]}
 255     => 'DBIx::Class::Storage::DBI::Replicated::Replicant';
 256
 257 ## Add some info to the database
 258
 259 $replicated
 260     ->schema
 261     ->populate('Artist', [
 262         [ qw/artistid name/ ],
 263         [ 4, "Ozric Tentacles"],
 264     ]);
 265
 266 ## Make sure all the slaves have the table definitions
 267
 268 $replicated->replicate;
 269 $replicated->schema->storage->replicants->{$replicant_names[0]}->active(1);
 270 $replicated->schema->storage->replicants->{$replicant_names[1]}->active(1);
 271
 272 ## Silence warning about not supporting the is_replicating method if using the
 273 ## sqlite dbs.
 274 $replicated->schema->storage->debugobj->silence(1)
 275   if first { m{^t/} } @replicant_names;
 276
 277 $replicated->schema->storage->pool->validate_replicants;
 278
 279 $replicated->schema->storage->debugobj->silence(0);
 280
 281 ## Make sure we can read the data.
 282
 283 ok my $artist1 = $replicated->schema->resultset('Artist')->find(4)
 284     => 'Created Result';
 285
 286 isa_ok $artist1
 287     => 'DBICTest::Artist';
 288
 289 is $artist1->name, 'Ozric Tentacles'
 290     => 'Found expected name for first result';
 291
 292 ## Add some new rows that only the master will have  This is because
 293 ## we overload any type of write operation so that is must hit the master
 294 ## database.
 295
 296 $replicated
 297     ->schema
 298     ->populate('Artist', [
 299         [ qw/artistid name/ ],
 300         [ 5, "Doom's Children"],
 301         [ 6, "Dead On Arrival"],
 302         [ 7, "Watergate"],
 303     ]);
 304
 305 ## Make sure all the slaves have the table definitions
 306 $replicated->replicate;
 307
 308 ## Should find some data now
 309
 310 ok my $artist2 = $replicated->schema->resultset('Artist')->find(5)
 311     => 'Sync succeed';
 312
 313 isa_ok $artist2
 314     => 'DBICTest::Artist';
 315
 316 is $artist2->name, "Doom's Children"
 317     => 'Found expected name for first result';
 318
 319 ## What happens when we disconnect all the replicants?
 320
 321 is $replicated->schema->storage->pool->connected_replicants => 2
 322     => "both replicants are connected";
 323
 324 $replicated->schema->storage->replicants->{$replicant_names[0]}->disconnect;
 325 $replicated->schema->storage->replicants->{$replicant_names[1]}->disconnect;
 326
 327 is $replicated->schema->storage->pool->connected_replicants => 0
 328     => "both replicants are now disconnected";
 329
 330 ## All these should pass, since the database should automatically reconnect
 331
 332 ok my $artist3 = $replicated->schema->resultset('Artist')->find(6)
 333     => 'Still finding stuff.';
 334
 335 isa_ok $artist3
 336     => 'DBICTest::Artist';
 337
 338 is $artist3->name, "Dead On Arrival"
 339     => 'Found expected name for first result';
 340
 341 is $replicated->schema->storage->pool->connected_replicants => 1
 342     => "At Least One replicant reconnected to handle the job";
 343
 344 ## What happens when we try to select something that doesn't exist?
 345
 346 ok ! $replicated->schema->resultset('Artist')->find(666)
 347     => 'Correctly failed to find something.';
 348
 349 ## test the reliable option
 350
 351 TESTRELIABLE: {
 352
 353         $replicated->schema->storage->set_reliable_storage;
 354
 355         ok $replicated->schema->resultset('Artist')->find(2)
 356             => 'Read from master 1';
 357
 358         ok $replicated->schema->resultset('Artist')->find(5)
 359             => 'Read from master 2';
 360
 361     $replicated->schema->storage->set_balanced_storage;
 362
 363         ok $replicated->schema->resultset('Artist')->find(3)
 364         => 'Read from replicant';
 365 }
 366
 367 ## Make sure when reliable goes out of scope, we are using replicants again
 368
 369 ok $replicated->schema->resultset('Artist')->find(1)
 370     => 'back to replicant 1.';
 371
 372 ok $replicated->schema->resultset('Artist')->find(2)
 373     => 'back to replicant 2.';
 374
 375 ## set all the replicants to inactive, and make sure the balancer falls back to
 376 ## the master.
 377
 378 $replicated->schema->storage->replicants->{$replicant_names[0]}->active(0);
 379 $replicated->schema->storage->replicants->{$replicant_names[1]}->active(0);
 380
 381 ## Silence warning about falling back to master.
 382 $replicated->schema->storage->debugobj->silence(1);
 383
 384 ok $replicated->schema->resultset('Artist')->find(2)
 385     => 'Fallback to master';
 386
 387 $replicated->schema->storage->debugobj->silence(0);
 388
 389 $replicated->schema->storage->replicants->{$replicant_names[0]}->active(1);
 390 $replicated->schema->storage->replicants->{$replicant_names[1]}->active(1);
 391
 392 ## Silence warning about not supporting the is_replicating method if using the
 393 ## sqlite dbs.
 394 $replicated->schema->storage->debugobj->silence(1)
 395   if first { m{^t/} } @replicant_names;
 396
 397 $replicated->schema->storage->pool->validate_replicants;
 398
 399 $replicated->schema->storage->debugobj->silence(0);
 400
 401 ok $replicated->schema->resultset('Artist')->find(2)
 402     => 'Returned to replicates';
 403
 404 ## Getting slave status tests
 405
 406 SKIP: {
 407     ## We skip this tests unless you have a custom replicants, since the default
 408     ## sqlite based replication tests don't support these functions.
 409
 410     skip 'Cannot Test Replicant Status on Non Replicating Database', 9
 411      unless DBICTest->has_custom_dsn && $ENV{"DBICTEST_SLAVE0_DSN"};
 412
 413     $replicated->replicate; ## Give the slaves a chance to catchup.
 414
 415         ok $replicated->schema->storage->replicants->{$replicant_names[0]}->is_replicating
 416             => 'Replicants are replicating';
 417
 418         is $replicated->schema->storage->replicants->{$replicant_names[0]}->lag_behind_master, 0
 419             => 'Replicant is zero seconds behind master';
 420
 421         ## Test the validate replicants
 422
 423         $replicated->schema->storage->pool->validate_replicants;
 424
 425         is $replicated->schema->storage->pool->active_replicants, 2
 426             => 'Still have 2 replicants after validation';
 427
 428         ## Force the replicants to fail the validate test by required their lag to
 429         ## be negative (ie ahead of the master!)
 430
 431     $replicated->schema->storage->pool->maximum_lag(-10);
 432     $replicated->schema->storage->pool->validate_replicants;
 433
 434     is $replicated->schema->storage->pool->active_replicants, 0
 435         => 'No way a replicant be be ahead of the master';
 436
 437     ## Let's be fair to the replicants again.  Let them lag up to 5
 438
 439     $replicated->schema->storage->pool->maximum_lag(5);
 440     $replicated->schema->storage->pool->validate_replicants;
 441
 442     is $replicated->schema->storage->pool->active_replicants, 2
 443         => 'Both replicants in good standing again';
 444
 445         ## Check auto validate
 446
 447         is $replicated->schema->storage->balancer->auto_validate_every, 100
 448             => "Got the expected value for auto validate";
 449
 450                 ## This will make sure we auto validatge everytime
 451                 $replicated->schema->storage->balancer->auto_validate_every(0);
 452
 453                 ## set all the replicants to inactive, and make sure the balancer falls back to
 454                 ## the master.
 455
 456                 $replicated->schema->storage->replicants->{$replicant_names[0]}->active(0);
 457                 $replicated->schema->storage->replicants->{$replicant_names[1]}->active(0);
 458
 459                 ## Ok, now when we go to run a query, autovalidate SHOULD reconnect
 460
 461         is $replicated->schema->storage->pool->active_replicants => 0
 462             => "both replicants turned off";
 463
 464         ok $replicated->schema->resultset('Artist')->find(5)
 465             => 'replicant reactivated';
 466
 467         is $replicated->schema->storage->pool->active_replicants => 2
 468             => "both replicants reactivated";
 469 }
 470
 471 ## Test the reliably callback
 472
 473 ok my $reliably = sub {
 474
 475     ok $replicated->schema->resultset('Artist')->find(5)
 476         => 'replicant reactivated';
 477
 478 } => 'created coderef properly';
 479
 480 $replicated->schema->storage->execute_reliably($reliably);
 481
 482 ## Try something with an error
 483
 484 ok my $unreliably = sub {
 485
 486     ok $replicated->schema->resultset('ArtistXX')->find(5)
 487         => 'replicant reactivated';
 488
 489 } => 'created coderef properly';
 490
 491 throws_ok {$replicated->schema->storage->execute_reliably($unreliably)}
 492     qr/Can't find source for ArtistXX/
 493     => 'Bad coderef throws proper error';
 494
 495 ## Make sure replication came back
 496
 497 ok $replicated->schema->resultset('Artist')->find(3)
 498     => 'replicant reactivated';
 499
 500 ## make sure transactions are set to execute_reliably
 501
 502 ok my $transaction = sub {
 503
 504         my $id = shift @_;
 505
 506         $replicated
 507             ->schema
 508             ->populate('Artist', [
 509                 [ qw/artistid name/ ],
 510                 [ $id, "Children of the Grave"],
 511             ]);
 512
 513     ok my $result = $replicated->schema->resultset('Artist')->find($id)
 514         => 'Found expected artist';
 515
 516     ok my $more = $replicated->schema->resultset('Artist')->find(1)
 517         => 'Found expected artist again';
 518
 519    return ($result, $more);
 520
 521 } => 'Created a coderef properly';
 522
 523 ## Test the transaction with multi return
 524 {
 525         ok my @return = $replicated->schema->txn_do($transaction, 666)
 526             => 'did transaction';
 527
 528             is $return[0]->id, 666
 529                 => 'first returned value is correct';
 530
 531             is $return[1]->id, 1
 532                 => 'second returned value is correct';
 533 }
 534
 535 ## Test that asking for single return works
 536 {
 537         ok my $return = $replicated->schema->txn_do($transaction, 777)
 538             => 'did transaction';
 539
 540             is $return->id, 777
 541                 => 'first returned value is correct';
 542 }
 543
 544 ## Test transaction returning a single value
 545
 546 {
 547         ok my $result = $replicated->schema->txn_do(sub {
 548                 ok my $more = $replicated->schema->resultset('Artist')->find(1)
 549                 => 'found inside a transaction';
 550                 return $more;
 551         }) => 'successfully processed transaction';
 552
 553         is $result->id, 1
 554            => 'Got expected single result from transaction';
 555 }
 556
 557 ## Make sure replication came back
 558
 559 ok $replicated->schema->resultset('Artist')->find(1)
 560     => 'replicant reactivated';
 561
 562 ## Test Discard changes
 563
 564 {
 565         ok my $artist = $replicated->schema->resultset('Artist')->find(2)
 566             => 'got an artist to test discard changes';
 567
 568         ok $artist->discard_changes
 569            => 'properly discard changes';
 570 }
 571
 572 ## Test some edge cases, like trying to do a transaction inside a transaction, etc
 573
 574 {
 575     ok my $result = $replicated->schema->txn_do(sub {
 576         return $replicated->schema->txn_do(sub {
 577                 ok my $more = $replicated->schema->resultset('Artist')->find(1)
 578                 => 'found inside a transaction inside a transaction';
 579                 return $more;
 580         });
 581     }) => 'successfully processed transaction';
 582
 583     is $result->id, 1
 584        => 'Got expected single result from transaction';
 585 }
 586
 587 {
 588     ok my $result = $replicated->schema->txn_do(sub {
 589         return $replicated->schema->storage->execute_reliably(sub {
 590                 return $replicated->schema->txn_do(sub {
 591                         return $replicated->schema->storage->execute_reliably(sub {
 592                                 ok my $more = $replicated->schema->resultset('Artist')->find(1)
 593                                 => 'found inside crazy deep transactions and execute_reliably';
 594                                 return $more;
 595                         });
 596                 });
 597         });
 598     }) => 'successfully processed transaction';
 599
 600     is $result->id, 1
 601        => 'Got expected single result from transaction';
 602 }
 603
 604 ## Test the force_pool resultset attribute.
 605
 606 {
 607         ok my $artist_rs = $replicated->schema->resultset('Artist')
 608         => 'got artist resultset';
 609
 610         ## Turn on Forced Pool Storage
 611         ok my $reliable_artist_rs = $artist_rs->search(undef, {force_pool=>'master'})
 612         => 'Created a resultset using force_pool storage';
 613
 614     ok my $artist = $reliable_artist_rs->find(2)
 615         => 'got an artist result via force_pool storage';
 616 }
 617
 618 ## Delete the old database files
 619 $replicated->cleanup;