protected PageInfo buildCachedPageInfo(
HttpServletRequest request, HttpServletResponse response, CacheStatus cacheStatus)
throws Exception {
Timer timer = new Timer(getCachedUri(request));
timer.start();
String key = calculateKey(request);
PageInfo pageInfo;
ValueWrapper element = cacheStatus.valueWrapper;
log.debug("Serving cached content for {}", key);
pageInfo = (PageInfo) element.get();
for (Map.Entry<String, ? extends Serializable> entry :
pageInfo.getRequestAttributes().entrySet()) {
request.setAttribute(entry.getKey(), entry.getValue());
}
// As the page is cached, we need to add an instance of the associated
// controller to the request. This is required by GrailsLayoutDecoratorMapper
// to pick the appropriate layout.
if (StringUtils.hasLength(getContext().getControllerName())) {
Object controller = lookupController(getContext().getControllerClass());
request.setAttribute(GrailsApplicationAttributes.CONTROLLER, controller);
}
timer.stop(true);
response.addHeader(X_CACHED, String.valueOf(true));
return pageInfo;
}
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;
}
