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PhabricatorGarbageCollectorDaemon.php
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Mon, Sep 30, 09:53

PhabricatorGarbageCollectorDaemon.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Collects old logs and caches to reduce the amount of data stored in the
* database.
*
* @group daemon
*/
class PhabricatorGarbageCollectorDaemon extends PhabricatorDaemon {
public function run() {
// Keep track of when we start and stop the GC so we can emit useful log
// messages.
$just_ran = false;
do {
$run_at = PhabricatorEnv::getEnvConfig('gcdaemon.run-at');
$run_for = PhabricatorEnv::getEnvConfig('gcdaemon.run-for');
// Just use the default timezone, we don't need to get fancy and try
// to localize this.
$start = strtotime($run_at);
if ($start === false) {
throw new Exception(
"Configuration 'gcdaemon.run-at' could not be parsed: '{$run_at}'.");
}
$now = time();
if ($now < $start || $now > ($start + $run_for)) {
if ($just_ran) {
echo "Stopped garbage collector.\n";
$just_ran = false;
}
// The configuration says we can't collect garbage right now, so
// just sleep until we can.
$this->sleep(300);
continue;
}
if (!$just_ran) {
echo "Started garbage collector.\n";
$just_ran = true;
}
$n_herald = $this->collectHeraldTranscripts();
$n_daemon = $this->collectDaemonLogs();
$n_parse = $this->collectParseCaches();
$collected = array(
'Herald Transcript' => $n_herald,
'Daemon Log' => $n_daemon,
'Differential Parse Cache' => $n_parse,
);
$collected = array_filter($collected);
foreach ($collected as $thing => $count) {
$count = number_format($count);
echo "Garbage collected {$count} '{$thing}' objects.\n";
}
$total = array_sum($collected);
if ($total < 100) {
// We didn't max out any of the GCs so we're basically caught up. Ease
// off the GC loop so we don't keep doing table scans just to delete
// a handful of rows.
$this->sleep(300);
} else {
$this->stillWorking();
}
} while (true);
}
private function collectHeraldTranscripts() {
$ttl = PhabricatorEnv::getEnvConfig('gcdaemon.ttl.herald-transcripts');
if ($ttl <= 0) {
return 0;
}
$table = new HeraldTranscript();
$conn_w = $table->establishConnection('w');
queryfx(
$conn_w,
'UPDATE %T SET
objectTranscript = "",
ruleTranscripts = "",
conditionTranscripts = "",
applyTranscripts = "",
garbageCollected = 1
WHERE garbageCollected = 0 AND `time` < %d
LIMIT 100',
$table->getTableName(),
time() - $ttl);
return $conn_w->getAffectedRows();
}
private function collectDaemonLogs() {
$ttl = PhabricatorEnv::getEnvConfig('gcdaemon.ttl.daemon-logs');
if ($ttl <= 0) {
return 0;
}
$table = new PhabricatorDaemonLogEvent();
$conn_w = $table->establishConnection('w');
queryfx(
$conn_w,
'DELETE FROM %T WHERE epoch < %d LIMIT 100',
$table->getTableName(),
time() - $ttl);
return $conn_w->getAffectedRows();
}
private function collectParseCaches() {
$key = 'gcdaemon.ttl.differential-parse-cache';
$ttl = PhabricatorEnv::getEnvConfig($key);
if ($ttl <= 0) {
return 0;
}
$table = new DifferentialChangeset();
$conn_w = $table->establishConnection('w');
queryfx(
$conn_w,
'DELETE FROM %T WHERE dateCreated < %d LIMIT 100',
DifferentialChangeset::TABLE_CACHE,
time() - $ttl);
return $conn_w->getAffectedRows();
}
}

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