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# Copyright (C) 2017 Stanislav Sinyagin
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
# Stanislav Sinyagin <ssinyagin@k-open.com>
package Torrus::AgentConfig;
use strict;
use warnings;
use Torrus::Redis;
use Git::ObjectStore;
use JSON;
use Torrus::Log;
sub new
{
my $class = shift;
my $treename = shift;
my $agent = shift;
my $instance = shift;
my $self = {};
bless $self, $class;
$self->{'treename'} = $treename;
$self->{'agent'} = $agent;
$self->{'instance'} = $instance;
$self->{'repodir'} = $Torrus::Global::gitRepoDir;
$self->{'branch'} = sprintf('%s_%s_%.4x', $treename, $agent, $instance);
$self->{'redis'} =
Torrus::Redis->new(server => $Torrus::Global::redisServer);
$self->{'redis_prefix'} = $Torrus::Global::redisPrefix;
$self->{'json'} = JSON->new->allow_nonref(1);
return $self;
}
sub _store
{
my $self = shift;
my $store = new Git::ObjectStore(
'repodir' => $self->{'repodir'},
'branchname' => $self->{'branch'},
'goto' => $self->{'current_head'});
return $store;
}
sub needsFlush
{
my $self = shift;
if( not defined($self->{'current_head'}) )
{
return 1;
}
else
{
eval { $self->_store() };
if( $@ )
{
return 1;
}
}
return 0;
}
sub readAll
{
my $self = shift;
my $cb_token_updated = shift;
my $informed_not_ready;
my $head;
while( not defined($head) )
{
$head = $self->{'redis'}->hget(
$self->{'redis_prefix'} . 'githeads', $self->{'branch'});
if( not defined($head) )
{
if( not $informed_not_ready )
{
Info('Nothing is yet available for branch ' .
$self->{'branch'} . '. Waiting for data.');
$informed_not_ready = 1;
}
sleep(20);
}
}
Debug('Reading all entries in ' . $self->{'branch'});
$self->{'current_head'} = $head;
my $n_updated = 0;
my $store = $self->_store();
my $cb_read = sub {
my ($path, $data) = @_;
my $token = join('', split('/', $path));
&{$cb_token_updated}($token, $self->{'json'}->decode($data));
$n_updated++
};
$store->recursive_read('', $cb_read);
Debug('Read ' . $n_updated . ' entries from ' . $self->{'branch'});
return;
}
sub readUpdates
{
my $self = shift;
my $cb_token_updated = shift;
my $cb_token_deleted = shift;
if( not defined($self->{'current_head'}) )
{
die('readUpdates was called prior to readAll');
}
my $head = $self->{'redis'}->hget(
$self->{'redis_prefix'} . 'githeads', $self->{'branch'});
if( not defined($head) )
{
die('Cannot read the branch head from Redis');
}
if( $head eq $self->{'current_head'} )
{
return 0;
}
my $old_head = $self->{'current_head'};
$self->{'current_head'} = $head;
my $store = $self->_store();
my $n_updated = 0;
my $n_deleted = 0;
my $cb_updated = sub {
my ($path, $data) = @_;
my $token = join('', split('/', $path));
&{$cb_token_updated}($token, $self->{'json'}->decode($data));
$n_updated++
};
my $cb_deleted = sub {
my ($path) = @_;
my $token = join('', split('/', $path));
&{$cb_token_deleted}($token);
$n_deleted++
};
Debug('Reading new entries in ' . $self->{'branch'});
$store->read_updates($old_head, $cb_updated, $cb_deleted);
Debug("Updated: $n_updated, Deleted: $n_deleted entries");
return 1;
}
1;
# Local Variables:
# mode: perl
# indent-tabs-mode: nil
# perl-indent-level: 4
# End:
|
