function generate_browse()
{
// check if there is anything cached
$cached = load_cached('browse');
if ($cached !== false) {
// yes, output
echo $cached;
flush();
}
// check if we still want/need to generate the page
if (cache_needs_update('browse', config('cache_time'))) {
$data = array();
foreach (list_works() as $name) {
$work = load_work($name);
if ($work === false) {
continue;
}
$data[] = $work;
}
$generated = run_template('template-browse.php', $data);
// save the generated page
save_cached('browse', $generated);
// output if we haven't already above
if ($cached === false) {
echo $generated;
}
}
}
function cache_or_disk($keyword, $backing_file, $cache_keys)
{
// fb("cache_or_disk({$keyword}, {$backing_file}, ...");
// fb($cache_keys, "cache_keys");
$known_keywords = array('objects', 'status', 'perms');
if (!in_array($keyword, $known_keywords)) {
// XXX do something better
die("Unknown keyword '{$keyword}'");
}
$useAPC = useAPC();
$start_time = microtime(TRUE);
$array = NULL;
//fb($keyword, "doing cache_or_disk($keyword)");
if ($useAPC) {
//fb(apc_cache_info(), "apc cache info");
$read_file = cache_needs_update($keyword, $backing_file);
$cacheFail = FALSE;
$success = FALSE;
if (!$read_file) {
// Loop through each variables cached value. If a read fails note it and
// read from disk
foreach ($cache_keys as $key) {
$array[$key] = apc_fetch($key, $success);
if (!$success) {
$cacheFail = TRUE;
//fb("Cache Fail for key {$key}!");
break;
}
}
if (!$cacheFail) {
// Every key was found in cache
//fb("$keyword data from cache!");
}
}
}
// The cache is not enabled or
// the cache is enabled and of the following three conditions occurred
// There was a cache miss
// The data file is newer than the cached version
if (!$useAPC || !$success || $read_file || $cacheFail) {
$array = read_disk($keyword, $cache_keys);
if ($useAPC) {
//foreach($cache_keys as $key) {
foreach (array_keys($array) as $key) {
apc_store($key, $array[$key]);
}
apc_store('last_' . $keyword . '_read', time());
//fb('stored keys to cache');
}
//fb("$keyword data from disk!");
}
$end_time = microtime(TRUE);
//fb($end_time - $start_time, "Elapsed load time {$end_time} - {$start_time}");
return $array;
}
