X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2F93storage_replication.t;h=afe7b7627a85be86d67f1259cb6c87bcc4a3c33e;hb=434ffe5f4cd4d2bfb6cadb6c6100096ecdadbb60;hp=34c0f48b1ab52298142da313d1a915e167363db8;hpb=8f7986d659a813f1dec169a7f57c38f956560ea4;p=dbsrgits%2FDBIx-Class.git

diff --git a/t/93storage_replication.t b/t/93storage_replication.t
index 34c0f48..afe7b76 100644
--- a/t/93storage_replication.t
+++ b/t/93storage_replication.t
@@ -1,66 +1,265 @@
 use strict;
 use warnings;
 use lib qw(t/lib);
+use Test::More;
+
+BEGIN {
+    eval "use DBD::Multi";
+    plan $@
+        ? ( skip_all => 'needs DBD::Multi for testing' )
+        : ( tests => 18 );
+}	
+
+## ----------------------------------------------------------------------------
+## Build a class to hold all our required testing data and methods.
+## ----------------------------------------------------------------------------
+
+TESTSCHEMACLASS: {
+	
+	package DBIx::Class::DBI::Replication::TestReplication;
+
+	use DBI;	
+	use DBICTest;
+	use File::Copy;
+	
+	## Create a constructor
+	
+	sub new {
+		my $class = shift @_;
+		my %params = @_;
+		
+		my $self = bless {
+			db_paths => $params{db_paths},
+			dsns => $class->init_dsns(%params),
+			schema=>$class->init_schema,
+		}, $class;
+		
+		$self->connect;
+		return $self;
+	}
+	
+	## get the DSNs.  We build this up from the list of file paths
+	
+	sub init_dsns {
+		my $class = shift @_;
+		my %params = @_;
+		my $db_paths = $params{db_paths};
+
+		my @dsn = map {
+			"dbi:SQLite:${_}";
+		} @$db_paths;
+		
+		return \@dsn;
+	}
+
+	## get the Schema and set the replication storage type
+	
+	sub init_schema {
+		my $class = shift @_;
+		my $schema = DBICTest->init_schema();
+		$schema->storage_type( '::DBI::Replication' );
+		
+		return $schema;
+	}
+	
+	## connect the Schema
+	
+	sub connect {
+		my $self = shift @_;
+		my ($master, @slaves) = @{$self->{dsns}};
+		my @connections = ([$master, '','', {AutoCommit=>1, PrintError=>0}]);
+		my @slavesob;
+		
+		foreach my $slave (@slaves)
+		{
+			my $dbh = shift @{$self->{slaves}}
+			 || DBI->connect($slave,"","",{PrintError=>0, PrintWarn=>0});
+			
+			push @connections,
+			 [$dbh, '','',{priority=>10}];
+			 
+			push @slavesob,
+			 $dbh;
+		}
+		
+		## Keep track of the created slave databases
+		$self->{slaves} = \@slavesob;
+		
+		$self
+			->{schema}
+			->connect([
+				@connections,
+				{limit_dialect => 'LimitXY'}
+			]);
+	}
+	
+	## replication
+	
+	sub replicate {
+		my $self = shift @_;
+		my ($master, @slaves) = @{$self->{db_paths}};
+		
+		foreach my $slave (@slaves) {
+			copy($master, $slave);
+		}
+	}
+	
+	## Cleanup afer ourselves.
+	
+	sub cleanup {
+		my $self = shift @_;
+		my ($master, @slaves) = @{$self->{db_paths}};
+		
+		foreach my $slave (@slaves) {
+			unlink $slave;
+		}		
+	}
+	
+	## Force a reconnection
+	
+	sub reconnect {
+		my $self = shift @_;
+		my $schema = $self->connect;
+		$self->{schema} = $schema;
+		return $schema;
+	}
+}
+
+## ----------------------------------------------------------------------------
+## Create an object and run some tests
+## ----------------------------------------------------------------------------
+
+my %params = (
+	db_paths => [
+		"t/var/DBIxClass.db",
+		"t/var/DBIxClass_slave1.db",
+		"t/var/DBIxClass_slave2.db",
+	],
+);
+
+ok my $replicate = DBIx::Class::DBI::Replication::TestReplication->new(%params)
+	=> 'Created a replication object';
+	
+isa_ok $replicate->{schema}
+	=> 'DBIx::Class::Schema';
+
+## Add some info to the database
+
+$replicate
+	->{schema}
+	->populate('Artist', [
+		[ qw/artistid name/ ],
+		[ 4, "Ozric Tentacles"],
+	]);
+			    
+## Make sure all the slaves have the table definitions
+
+$replicate->replicate;
+
+## Make sure we can read the data.
+
+ok my $artist1 = $replicate->{schema}->resultset('Artist')->find(4)
+	=> 'Created Result';
+
+isa_ok $artist1
+	=> 'DBICTest::Artist';
+	
+is $artist1->name, 'Ozric Tentacles'
+	=> 'Found expected name for first result';
+
+## Add some new rows that only the master will have  This is because
+## we overload any type of write operation so that is must hit the master
+## database.
+
+use Fcntl qw (:flock);
+
+my $master_path = $replicate->{db_paths}->[0];
+open LOCKFILE, ">>$master_path"
+ or die "Cannot open $master_path";
+flock(LOCKFILE, LOCK_EX);
+
+$replicate
+	->{schema}
+	->populate('Artist', [
+		[ qw/artistid name/ ],
+		[ 5, "Doom's Children"],
+		[ 6, "Dead On Arrival"],
+		[ 7, "Watergate"],
+	]);
+	
+## Reconnect the database
+$replicate->reconnect;
+
+## Alright, the database 'cluster' is not in a consistent state.  When we do
+## a read now we expect bad news
+
+is $replicate->{schema}->resultset('Artist')->find(5), undef
+	=> 'read after disconnect fails because it uses slave 1 which we have neglected to "replicate" yet';
+
+## Make sure all the slaves have the table definitions
+$replicate->replicate;
+
+## Should find some data now
+
+ok my $artist2 = $replicate->{schema}->resultset('Artist')->find(5)
+	=> 'Sync succeed';
+	
+isa_ok $artist2
+	=> 'DBICTest::Artist';
+	
+is $artist2->name, "Doom's Children"
+	=> 'Found expected name for first result';
+	
+## What happens when we delete one of the slaves?
+
+ok my $slave1 = @{$replicate->{slaves}}[0]
+	=> 'Got Slave1';
+
+ok $slave1->disconnect
+	=> 'disconnected slave1';
+
+$replicate->reconnect;
+
+ok my $artist3 = $replicate->{schema}->resultset('Artist')->find(6)
+	=> 'Still finding stuff.';
+	
+isa_ok $artist3
+	=> 'DBICTest::Artist';
+	
+is $artist3->name, "Dead On Arrival"
+	=> 'Found expected name for first result';
+	
+## Let's delete all the slaves
+
+ok my $slave2 = @{$replicate->{slaves}}[1]
+	=> 'Got Slave2';
+
+ok $slave2->disconnect
+	=> 'Disconnected slave2';
+
+$replicate->reconnect;
+
+## We expect an error now, since all the slaves are dead
+
+eval {
+	$replicate->{schema}->resultset('Artist')->find(4)->name;
+};
+
+ok $@ => 'Got error when trying to find artistid 4';
+
+## This should also be an error
+
+eval {
+	my $artist4 = $replicate->{schema}->resultset('Artist')->find(7);	
+};
+
+ok $@ => 'Got read errors after everything failed';
+
+## Delete the old database files
+$replicate->cleanup;
+
+
+
 
-use File::Copy;
 
-use DBICTest;
 
-use Test::More;
-eval {use DBD::Multi};
-plan skip_all => 'No DBD::Multi' if ($@);
-
-plan tests => 3;
-
-my $schema = DBICTest->init_schema();
-
-$schema->storage_type( '::DBI::Replication' );
-
-
-my $db_file1 = "t/var/DBIxClass.db";
-my $db_file2 = "t/var/DBIxClass_slave1.db";
-my $db_file3 = "t/var/DBIxClass_slave2.db";
-my $dsn1 = $ENV{"DBICTEST_DSN"} || "dbi:SQLite:${db_file1}";
-my $dsn2 = $ENV{"DBICTEST_DSN2"} || "dbi:SQLite:${db_file2}";
-my $dsn3 = $ENV{"DBICTEST_DSN3"} || "dbi:SQLite:${db_file3}";
-
-$schema->connect( [
-		   [ $dsn1, '', '', { AutoCommit => 1 } ],
-		   [ $dsn2, '', '', { priority => 10 } ],
-		   [ $dsn3, '', '', { priority => 10 } ]
-		  ]
-		);
-
-$schema->populate('Artist', [
-			     [ qw/artistid name/ ],
-			     [ 4, 'Ozric Tentacles']
-			    ]);
-
-my $new_artist1 = $schema->resultset('Artist')->find(4);
-
-isa_ok ($new_artist1, 'DBICTest::Artist');
-
-# reconnect
-my $schema2 = $schema->connect( [
-				 [ $dsn1, '', '', { AutoCommit => 1 } ],
-				 [ $dsn2, '', '', { priority => 10 } ],
-				 [ $dsn3, '', '', { priority => 10 } ]
-				]
-			      );
-
-# try and read (should fail)
-eval { my $new_artist2 = $schema2->resultset('Artist')->find(4); };
-ok($@, 'read after disconnect fails because it uses slave 1 which we have neglected to "replicate" yet');
-
-# try and read (should succede after faked synchronisation)
-copy($db_file1, $db_file2);
-$schema2 = $schema->connect( [
-			      [ $dsn1, '', '', { AutoCommit => 1 } ],
-			      [ $dsn2, '', '', { priority => 10 } ],
-			      [ $dsn3, '', '', { priority => 10 } ]
-			     ]
-			   );
-my $new_artist3 = $schema2->resultset('Artist')->find(4);
-isa_ok ($new_artist3, 'DBICTest::Artist');
-
-unlink $db_file2;