public function compute($command)
{
$context = "Platform: " . stack_connection_helper::get_platform() . "\n";
$context .= "Maxima shell command: " . $this->command . "\n";
$context .= "Maxima initial command: " . $this->initcommand . "\n";
$context .= "Maxima timeout: " . $this->timeout;
$this->debug->log('Context used', $context);
$this->debug->log('Maxima command', $command);
$rawresult = $this->call_maxima($command);
$this->debug->log('CAS result', $rawresult);
$unpackedresult = $this->unpack_raw_result($rawresult);
$this->debug->log('Unpacked result as', print_r($unpackedresult, true));
if (!stack_connection_helper::check_stackmaxima_version($unpackedresult)) {
stack_connection_helper::warn_about_version_mismatch($this->debug);
}
return $unpackedresult;
}
public function compute($command)
{
$cached = $this->get_cached_result($command);
if ($cached->result) {
$this->debug->log('Maxima command', $command);
$this->debug->log('Unpacked result found in the DB cache', print_r($cached->result, true));
if (!stack_connection_helper::check_stackmaxima_version($cached->result)) {
stack_connection_helper::warn_about_version_mismatch($this->debug);
// We could consider automatically purging the cache here.
}
return $cached->result;
}
$this->debug->log('Maxima command not found in the cache. Using the raw connection.');
$result = $this->rawconnection->compute($command);
// Only add to the cache if we didn't timeout!
if (!stack_connection_helper::did_cas_timeout($result)) {
$this->add_to_cache($command, $result, $cached->key);
}
return $result;
}
