Examples of com.netflix.evcache.pool.EVCacheClient

com.netflix.evcache.pool.EVCacheClient
A client for the EVCache Cluster. The client manages all the communication with the server. The client handles all the operations and if needed performs any fallback operations if a requests fails.

    public <T> T get(String key, EVCacheTranscoder<T> tc) throws EVCacheException {
        if (null == key) {
            throw new IllegalArgumentException("Key cannot be null");
        }


        final EVCacheClient client = _pool.getEVCacheClient();
        if (client == null) {
            NULL_CLIENT_COUNTER.increment();
            if (_throwException.get()) {
                throw new EVCacheException("Couldn't find an Client to get the data for key : " + key);
            }
            return null;  // Fast failure
        }


        try {
            final String canonicalKey = getCanonicalizedKey(key);
            T data = client.get(canonicalKey, tc);
            if (data == null && isInZoneFallback()) {
                final EVCacheClient fbClient = _pool.getEVCacheClientExcludeZone(client.getZone());
                if (fbClient == null) {
                    return null;
                }
                data = fbClient.get(canonicalKey, tc);
                if (data == null) {
                    FALLBACK_MISS_COUNTER.increment();
                } else {
                    FALLBACK_HIT_COUNTER.increment();
                }

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    public <T> Future<T> getAsynchronous(String key, EVCacheTranscoder<T> tc) throws EVCacheException {
        if (null == key) {
            throw new IllegalArgumentException();
        }


        final EVCacheClient client = _pool.getEVCacheClient();
        if (client == null) {
            NULL_CLIENT_COUNTER.increment();
            if (_throwException.get()) {
                throw new EVCacheException("Could not find a client to asynchronously get the data");
            }
            return null;  // Fast failure
        }


        final Future<T> r;
        try {
            final String canonicalKey = getCanonicalizedKey(key);
            r = client.asyncGet(canonicalKey, tc);
        } catch (Exception ex) {
            if (log.isDebugEnabled()) {
                log.debug("Exception while getting data for keys Asynchronously key : " + key, ex);
            }
            if (!_throwException.get()) {

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        }
        if (keys.isEmpty()) {
            return Collections.<String, T>emptyMap();
        }


        final EVCacheClient client = _pool.getEVCacheClient();
        if (client == null) {
            NULL_CLIENT_COUNTER.increment();
            if (_throwException.get()) {
                throw new EVCacheException("Could not find a client to get the data in bulk");
            }
            return null;  // Fast failure
        }


        final Collection<String> canonicalKeys = new ArrayList<String>();


        /* Canonicalize keys and perform fast failure checking */
        for (String k : keys) {
            final String canonicalK = getCanonicalizedKey(k);
            canonicalKeys.add(canonicalK);
        }


        try {
            final Map<String, T> retMap = client.getBulk(canonicalKeys, tc);
            if (retMap == null || retMap.isEmpty()) {
                return Collections.<String, T>emptyMap();
            }


            /* Decanonicalize the keys */

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            final List<InetSocketAddress> memInstances = getMemcachedSocketAddressList(instances);
            final int poolSize = getPoolSize().get();
            final List<EVCacheClient> newClients = new ArrayList<EVCacheClient>(poolSize);
            for (int i = 0; i < poolSize; i++) {
                final int maxQueueSize = ConfigurationManager.getConfigInstance().getInt(getAppName() + ".max.queue.length", 16384);
                final EVCacheClient client = new SimpleEVCacheClientImpl(getAppName(), i, maxQueueSize, getReadTimeout(), memInstances);
                newClients.add(client);
                if (log.isDebugEnabled()) log.debug("AppName :" + getAppName() + "; intit : client.getId() : " + client.getId());
            }
            setupNewClients(newClients);
        } catch (Throwable t) {
            log.error("Exception while refreshing the Server list", t);
        }

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Related Classes of com.netflix.evcache.pool.EVCacheClient

com.netflix.evcache.EVCacheImpl

com.netflix.evcache.pool.standalone.SimpleEVCacheClientPoolImpl

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