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-rw-r--r--extensions/Push/lib/Backoff.pm109
1 files changed, 109 insertions, 0 deletions
diff --git a/extensions/Push/lib/Backoff.pm b/extensions/Push/lib/Backoff.pm
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+++ b/extensions/Push/lib/Backoff.pm
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+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+
+package Bugzilla::Extension::Push::Backoff;
+
+use strict;
+use warnings;
+
+use base 'Bugzilla::Object';
+
+use constant AUDIT_CREATES => 0;
+use constant AUDIT_UPDATES => 0;
+use constant AUDIT_REMOVES => 0;
+
+use Bugzilla;
+use Bugzilla::Util;
+
+#
+# initialisation
+#
+
+use constant DB_TABLE => 'push_backoff';
+use constant DB_COLUMNS => qw(
+ id
+ connector
+ next_attempt_ts
+ attempts
+);
+use constant UPDATE_COLUMNS => qw(
+ next_attempt_ts
+ attempts
+);
+use constant VALIDATORS => {
+ connector => \&_check_connector,
+ next_attempt_ts => \&_check_next_attempt_ts,
+ attempts => \&_check_attempts,
+};
+use constant LIST_ORDER => 'next_attempt_ts';
+
+#
+# accessors
+#
+
+sub connector { return $_[0]->{'connector'}; }
+sub next_attempt_ts { return $_[0]->{'next_attempt_ts'}; }
+sub attempts { return $_[0]->{'attempts'}; }
+
+sub next_attempt_time {
+ my ($self) = @_;
+ if (!exists $self->{'next_attempt_time'}) {
+ $self->{'next_attempt_time'} = datetime_from($self->next_attempt_ts)->epoch;
+ }
+ return $self->{'next_attempt_time'};
+}
+
+#
+# mutators
+#
+
+sub reset {
+ my ($self) = @_;
+ $self->{next_attempt_ts} = Bugzilla->dbh->selectrow_array('SELECT NOW()');
+ $self->{attempts} = 0;
+ Bugzilla->push_ext->logger->debug(
+ sprintf("resetting backoff for %s", $self->connector)
+ );
+}
+
+sub inc {
+ my ($self) = @_;
+ my $dbh = Bugzilla->dbh;
+
+ my $attempts = $self->attempts + 1;
+ my $seconds = $attempts <= 4 ? 5 ** $attempts : 15 * 60;
+ my ($date) = $dbh->selectrow_array("SELECT " . $dbh->sql_date_math('NOW()', '+', $seconds, 'SECOND'));
+
+ $self->{next_attempt_ts} = $date;
+ $self->{attempts} = $attempts;
+ Bugzilla->push_ext->logger->debug(
+ sprintf("setting next attempt for %s to %s (attempt %s)", $self->connector, $date, $attempts)
+ );
+}
+
+#
+# validators
+#
+
+sub _check_connector {
+ my ($invocant, $value) = @_;
+ Bugzilla->push_ext->connectors->exists($value) || ThrowCodeError('push_invalid_connector');
+ return $value;
+}
+
+sub _check_next_attempt_ts {
+ my ($invocant, $value) = @_;
+ return $value || Bugzilla->dbh->selectrow_array('SELECT NOW()');
+}
+
+sub _check_attempts {
+ my ($invocant, $value) = @_;
+ return $value || 0;
+}
+
+1;
+