@Override
public Response<String> apply(CacheResource rsrc, Input input) throws AuthException {
if (WEB_SESSIONS.equals(rsrc.getName()) && !self.get().getCapabilities().canMaintainServer()) {
throw new AuthException(String.format("only site maintainers can flush %s", WEB_SESSIONS));
}
rsrc.getCache().invalidateAll();
return Response.ok("");
}
/**
* Method to get the stats about the cache.
*
* @return
*/
public String getStats() {
StringBuilder stringBuilder = new StringBuilder();
CacheStats cacheStats = cacheResource.getCacheStats().minus(relativeCacheStats);
stringBuilder.append(
String.format("Total succesful loaded values: %d %n", cacheStats.loadSuccessCount()));
stringBuilder.append(String.format("Total requests: %d %n", cacheStats.requestCount()));
stringBuilder.append(
String.format(
"Hits ratio: %d/%d - %.3f %n",
cacheStats.hitCount(), cacheStats.missCount(), cacheStats.hitRate()));
stringBuilder.append(
String.format(
"Average time spent loading new values (nanoseconds): %.3f %n",
cacheStats.averageLoadPenalty()));
stringBuilder.append(
String.format("Number of cache evictions: %d %n", cacheStats.evictionCount()));
return stringBuilder.toString();
}
@Override
public void handleDELETE(CoapExchange exchange) {
// reset the cache
relativeCacheStats = cacheResource.getCacheStats().minus(relativeCacheStats);
exchange.respond(ResponseCode.DELETED);
}
/**
* Instantiates a new debug resource.
*
* @param resourceIdentifier the resource identifier
* @param cacheResource
*/
public CacheStatResource(String resourceIdentifier, CacheResource cacheResource) {
super(resourceIdentifier);
this.cacheResource = cacheResource;
relativeCacheStats = cacheResource.getCacheStats();
}
