protected PageInfo buildNewPageInfo(
HttpServletRequest request,
HttpServletResponse response,
FilterChain chain,
CacheStatus cacheStatus,
Map<String, Collection<CacheOperationContext>> operationsByType)
throws Exception {
Timer timer = new Timer(getCachedUri(request));
timer.start();
String key = calculateKey(request);
PageInfo pageInfo;
try {
// Page is not cached - build the response, cache it, and send to client
pageInfo = buildPage(request, response, chain);
if (pageInfo.isOk()) {
Object noCache = pageInfo.getCacheDirectives().get("no-cache");
if (noCache instanceof Boolean && ((Boolean) noCache)) {
log.debug("Response ok but Cache-Control: no-cache is present, not caching");
releaseCacheLocks(operationsByType, key);
} else {
Collection<Cache> caches = new ArrayList<Cache>();
for (CacheOperationContext operationContext : operationsByType.get(UPDATE)) {
for (Cache cache : operationContext.getCaches()) {
caches.add(cache);
}
}
update(caches, pageInfo, cacheStatus, key);
}
} else {
for (CacheOperationContext operationContext : operationsByType.get(UPDATE)) {
for (Cache cache : operationContext.getCaches()) {
log.debug(
"Response not ok ({}). Putting null into cache {} with key {}",
pageInfo.getStatusCode(),
cache.getName(),
key);
}
}
releaseCacheLocks(operationsByType, key);
}
} catch (Exception e) {
if ("net.sf.ehcache.constructs.blocking.LockTimeoutException"
.equals(e.getClass().getName())) {
// do not release the lock, because you never acquired it
throw e;
}
// Must unlock the cache if the above fails. Will be logged at Filter
releaseCacheLocks(operationsByType, key);
throw e;
}
timer.stop(false);
response.addHeader(X_CACHED, String.valueOf(false));
return pageInfo;
}
protected void update(
Collection<Cache> caches, PageInfo pageInfo, CacheStatus cacheStatus, String key) {
ValueWrapper element = cacheStatus == null ? null : cacheStatus.valueWrapper;
Object maxAge = pageInfo.getCacheDirectives().get("max-age");
int timeToLive =
(maxAge instanceof Integer) ? ((Integer) maxAge) : (int) pageInfo.getTimeToLiveSeconds();
for (Cache cache : caches) {
log.debug(
"Response ok. Adding to cache {} with key {} and ttl {}",
cache.getName(),
key,
getTimeToLive(element));
put(cache, key, pageInfo, timeToLive);
}
}
