@SuppressWarnings("deprecation") // self-use
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
in.defaultReadObject();
MapMaker mapMaker = readMapMaker(in);
delegate = mapMaker.makeComputingMap(computingFunction);
readEntries(in);
}
private static Map<Pair<Class, String>, String> createResourceCache() {
MapMaker maker = new MapMaker().softValues().maximumSize(100);
String isDev = System.getProperty(ConstantValues.dev.getPropertyName());
if (StringUtils.isBlank(isDev)) {
isDev = System.getProperty("aol.devMode");
}
if (Boolean.parseBoolean(isDev)) {
maker.expireAfterWrite(30, TimeUnit.SECONDS);
}
return maker.makeComputingMap(
new Function<Pair<Class, String>, String>() {
@Override
public String apply(@Nonnull Pair<Class, String> pair) {
return readResourceNoCache(pair.getFirst(), pair.getSecond());
}
});
}
public SocialDataCaches(Duration expiresAfter) {
final MapMaker cacheTemplate =
new MapMaker()
.softValues()
.expireAfterWrite(expiresAfter.getMillis(), TimeUnit.MILLISECONDS);
perUserCaches =
cacheTemplate.makeComputingMap(
new Function<UserRef, ConcurrentMap<K, V>>() {
@Override
public ConcurrentMap<K, V> apply(UserRef from) {
return cacheTemplate.makeMap();
}
});
anonCache = cacheTemplate.makeMap();
}
@Path("/v2/event")
public class EventResource {
private final Set<EventWriter> writers;
private final Set<String> acceptedEventTypes;
private final ScheduledExecutorService executor;
private final EventClient eventClient;
private final MapMaker maker = new MapMaker();
private ConcurrentMap<String, ProcessStats> stats = maker.makeMap();
@Inject
public EventResource(
Set<EventWriter> writers,
ServerConfig config,
ScheduledExecutorService executor,
EventClient eventClient) {
Preconditions.checkNotNull(writers, "writer must not be null");
this.writers = writers;
this.acceptedEventTypes = ImmutableSet.copyOf(config.getAcceptedEventTypes());
this.stats = Maps.newConcurrentMap();
this.executor = executor;
this.eventClient = eventClient;
}
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response post(List<Event> events) throws IOException {
Set<String> badEvents = Sets.newHashSet();
for (Event event : events) {
if (acceptedEventType(event.getType())) {
for (EventWriter writer : writers) {
writer.write(event);
}
increment(event.getType());
} else {
badEvents.add(event.getType());
}
}
if (!badEvents.isEmpty()) {
String errorMessage = "Invalid event type(s): " + Joiner.on(", ").join(badEvents);
return Response.status(Status.BAD_REQUEST).entity(errorMessage).build();
}
return Response.status(Response.Status.ACCEPTED).build();
}
private boolean acceptedEventType(String type) {
return acceptedEventTypes.isEmpty() || acceptedEventTypes.contains(type);
}
private void increment(String eventType) {
ProcessStats eventStats = stats.get(eventType);
if (eventStats == null) {
stats.putIfAbsent(eventType, new ProcessStats(executor, eventClient, eventType));
eventStats = stats.get(eventType);
eventStats.start();
}
eventStats.processed(1);
}
}
/**
* Creates a new cache instance.
*
* @param name a human readable identifier for this cache. Note that this value will be used to
* derive a directory name if the disk cache is enabled, so don't get too creative here (camel
* case names work great)
* @param initialCapacity the initial element size of the cache
* @param expirationInMinutes time in minutes after which elements will be purged from the cache
* (NOTE: this only affects the memory cache, the disk cache does currently NOT handle element
* TTLs!)
* @param maxConcurrentThreads how many threads you think may at once access the cache; this need
* not be an exact number, but it helps in fragmenting the cache properly
*/
public AbstractCache(
String name, int initialCapacity, long expirationInMinutes, int maxConcurrentThreads) {
this.name = name;
MapMaker mapMaker = new MapMaker();
mapMaker.initialCapacity(initialCapacity);
mapMaker.expiration(expirationInMinutes * 60, TimeUnit.SECONDS);
mapMaker.concurrencyLevel(maxConcurrentThreads);
mapMaker.softValues();
this.cache = mapMaker.makeMap();
}
/**
* Configures the given map maker to use weak keys, if possible; does nothing otherwise (i.e., in
* GWT). This is sometimes acceptable, when only server-side code could generate enough volume
* that reclamation becomes important.
*/
static MapMaker tryWeakKeys(MapMaker mapMaker) {
return mapMaker.weakKeys();
}
public SessionCache() {
final MapMaker mapMaker = new MapMaker();
sessions = mapMaker.makeMap();
sessionCallbackMap = mapMaker.makeMap();
}
