public String newAudioClipInMemcache(String ownerId, AudioClip audioClip)
throws BadRequestException {
validateUserExistance(ownerId);
ArrayList<AudioClip> audioCLipList =
(ArrayList<AudioClip>) syncCache.get(TuneInConstants.ALL_AUDIO_CLIPS);
if (audioCLipList == null) {
audioCLipList = new ArrayList<AudioClip>();
}
audioCLipList.add(audioClip);
syncCache.put(TuneInConstants.ALL_AUDIO_CLIPS, audioCLipList, Expiration.byDeltaSeconds(60));
return audioClip.getKeyname();
}
public static void cachePutExp(String nameSpace, Object id, Serializable o, int exp) {
MemcacheService memcache = cacheInit(nameSpace);
try {
if (exp > 0) {
memcache.put(id, o, Expiration.byDeltaSeconds(exp));
} else {
memcache.put(id, o);
}
} catch (MemcacheServiceException e) {
// nothing can be done.
}
}
/**
* Put buckets in the cache, checking for cacheability and collisions.
*
* @return the set of keys that were *successfully* put without collision
*/
private Set<Key> cachePutIfUntouched(Iterable<Bucket> buckets) {
Map<Key, CasValues> payload = new HashMap<>();
for (Bucket buck : buckets) {
if (!buck.isCacheable()) continue;
Integer expirySeconds = cacheControl.getExpirySeconds(buck.getKey());
if (expirySeconds == null) continue;
Expiration expiration = expirySeconds == 0 ? null : Expiration.byDeltaSeconds(expirySeconds);
payload.put(buck.getKey(), new CasValues(buck.iv, buck.getNextToStore(), expiration));
}
return this.memcache.putIfUntouched(payload);
}
/** Cast objects: return the list of objects that must be shown in the castable device */
@SuppressWarnings("unchecked")
public List<CastViewObject> castObjects(CastView castView) {
MemcacheService cache =
MemcacheServiceFactory.getMemcacheService(CACHE_KEY + getStrategyName());
List<CastViewObject> castViewObjects = (List<CastViewObject>) cache.get(castView.getMnemonic());
if (castViewObjects != null) {
return castViewObjects;
} else {
castViewObjects = loadObjects(castView);
cache.put(
castView.getMnemonic(), castViewObjects, Expiration.byDeltaSeconds(EXPIRATION_TIME));
}
return castViewObjects;
}
public List<AudioClipInstance> getOtherUsersAudioClips(String userId) throws BadRequestException {
List<AudioClipInstance> audioClipInstanceList;
// no need to check for user existance here! if UserId is null, then all audioClips are returned
Filter userFilter =
new FilterPredicate(TuneInConstants.AUDIO_CLIP_OWNER_ID, FilterOperator.NOT_EQUAL, userId);
Query q = new Query(TuneInConstants.AUDIO_CLIP_TYPE).setFilter(userFilter);
PreparedQuery pq = datastore.prepare(q);
// check mem-cache for the results first
String CACHE_KEY = TuneInConstants.OTHERS_WORK_KEY + userId;
audioClipInstanceList = (ArrayList<AudioClipInstance>) syncCache.get(CACHE_KEY);
if (audioClipInstanceList == null) {
audioClipInstanceList = new ArrayList<AudioClipInstance>();
User user;
AudioClipInstance audioClipInstance;
for (Entity result : pq.asIterable()) {
user =
userService.getUserById(
(String) result.getProperty(TuneInConstants.AUDIO_CLIP_OWNER_ID));
audioClipInstance =
new AudioClipInstance(
KeyFactory.keyToString(result.getKey()),
(String) result.getProperty(TuneInConstants.AUDIO_CLIP_TITLE),
user,
(String) result.getProperty(TuneInConstants.AUDIO_CLIP_AUDIO_ID),
(String) result.getProperty(TuneInConstants.AUDIO_CLIP_IMAGE_ID),
(Date) result.getProperty(TuneInConstants.AUDIO_CLIP_DATE));
audioClipInstanceList.add(audioClipInstance);
}
syncCache.put(CACHE_KEY, audioClipInstanceList, Expiration.byDeltaSeconds(300));
}
return audioClipInstanceList;
}
/**
* A Configuration class for {@link ShardedCounterService}.
*
* @author David Fuelling <*****@*****.**>
*/
@Getter
@ToString
@EqualsAndHashCode
@Immutable
public class ShardedCounterServiceConfiguration {
// The number of shards to begin with for this counter.
static final int DEFAULT_NUM_COUNTER_SHARDS = 3;
static final int SIXTY_MINUTES_IN_SECONDS = 60 * 60;
// 5 Minute Expiration (by default) for counter counts in memcache before a
// Datastore query is attempted to get the new count.
static final Expiration DEFAULT_EXPIRATION = Expiration.byDeltaSeconds(SIXTY_MINUTES_IN_SECONDS);
// The number of counter shards to create when a new counter is created. The
// default value is 3.
private final int numInitialShards;
// The default Memcache expiration for counter objects.
private final Expiration defaultExpiration;
// The name of the queue that will be used to delete shards in an async
// fashion
private final String deleteCounterShardQueueName;
// The optional value of {@link TaskBuilder#url} when interacting with the
// queue used to delete CounterShards.
private final String relativeUrlPathForDeleteTaskQueue;
/**
* The default constructor for building a ShardedCounterService configuration class. Private so
* that only the builder can build this class.
*
* @param builder
*/
private ShardedCounterServiceConfiguration(Builder builder) {
Preconditions.checkNotNull(builder);
this.numInitialShards = builder.numInitialShards;
this.deleteCounterShardQueueName = builder.deleteCounterShardQueueName;
this.relativeUrlPathForDeleteTaskQueue = builder.relativeUrlPathForDeleteTaskQueue;
this.defaultExpiration = builder.getDefaultExpiration();
}
/**
* Constructs a {@link ShardedCounterServiceConfiguration} object with default values.
*
* @return
*/
public static ShardedCounterServiceConfiguration defaultConfiguration() {
ShardedCounterServiceConfiguration.Builder builder =
new ShardedCounterServiceConfiguration.Builder();
return new ShardedCounterServiceConfiguration(builder);
}
/**
* A Builder for {@link ShardedCounterServiceConfiguration}.
*
* @author david
*/
public static final class Builder {
@Getter @Setter private int numInitialShards;
/** Note: {@code null} may be used here to specify no specific expiration. */
@Getter @Setter private Expiration defaultExpiration;
@Getter @Setter private String deleteCounterShardQueueName;
@Getter @Setter private String relativeUrlPathForDeleteTaskQueue;
/** Default Constructor. Sets up this buildr with 1 shard by default. */
public Builder() {
this.numInitialShards = DEFAULT_NUM_COUNTER_SHARDS;
this.defaultExpiration = DEFAULT_EXPIRATION;
}
public Builder withNumInitialShards(int numInitialShards) {
Preconditions.checkArgument(
numInitialShards > 0, "Number of Shards for a new CounterData must be greater than 0!");
this.numInitialShards = numInitialShards;
return this;
}
public Builder withDeleteCounterShardQueueName(String deleteCounterShardQueueName) {
this.deleteCounterShardQueueName = deleteCounterShardQueueName;
return this;
}
public Builder withRelativeUrlPathForDeleteTaskQueue(String relativeUrlPathForDeleteTaskQueue) {
this.relativeUrlPathForDeleteTaskQueue = relativeUrlPathForDeleteTaskQueue;
return this;
}
/**
* Method to build a new {@link ShardedCounterServiceConfiguration}.
*
* @return
*/
public ShardedCounterServiceConfiguration build() {
return new ShardedCounterServiceConfiguration(this);
}
}
}
public Collection<CacheUtils.Wrapper<Transportation>> getSectorTransportations(long sectorIndex) {
return new CacheUtils.FixedCollection<Transportation>(
MC_KEY_TRANSPORTATION + sectorIndex,
MC_TRANSPORTATION_PER_SECTOR_LIMIT,
Expiration.byDeltaSeconds(MC_TRANSPORTATION_EXPIRATION_SECS));
}