protected EVCacheLatch add()

in evcache-core/src/main/java/com/netflix/evcache/EVCacheImpl.java [3283:3353]
67 lines of code
23 McCabe index (conditional complexity)

    protected <T> EVCacheLatch add(String key, T value, Transcoder<T> tc, int timeToLive, Policy policy, EVCacheClient[] clients, int latchCount, boolean fixup) throws EVCacheException {
        if ((null == key) || (null == value)) throw new IllegalArgumentException();
        checkTTL(timeToLive, Call.ADD);

        final boolean throwExc = doThrowException();
        if (clients.length == 0) {
            incrementFastFail(EVCacheMetricsFactory.NULL_CLIENT, Call.ADD);
            if (throwExc) throw new EVCacheException("Could not find a client to Add the data");
            return new EVCacheLatchImpl(policy, 0, _appName); // Fast failure
        }

        final EVCacheKey evcKey = getEVCacheKey(key);
        final EVCacheEvent event = createEVCacheEvent(Arrays.asList(clients), Call.ADD);
        if (event != null) {
            event.setEVCacheKeys(Arrays.asList(evcKey));
            try {
                if (shouldThrottle(event)) {
                    incrementFastFail(EVCacheMetricsFactory.THROTTLED, Call.ADD);
                    if (throwExc) throw new EVCacheException("Request Throttled for app " + _appName + " & key " + key);
                    return new EVCacheLatchImpl(policy, 0, _appName); // Fast failure
                }
            } catch(EVCacheException ex) {
                if(throwExc) throw ex;
                incrementFastFail(EVCacheMetricsFactory.THROTTLED, Call.ADD);
                return new EVCacheLatchImpl(policy, 0, _appName); // Fast failure
            }
            startEvent(event);
        }

        final long start = EVCacheMetricsFactory.getInstance().getRegistry().clock().wallTime();
        String status = EVCacheMetricsFactory.SUCCESS;
        EVCacheLatch latch = null;
        try {
            CachedData cd = null;
            if (tc != null) {
                cd = tc.encode(value);
            } else if (_transcoder != null) {
                cd = ((Transcoder<Object>) _transcoder).encode(value);
            } else {
                cd = _pool.getEVCacheClientForRead().getTranscoder().encode(value);
            }
            if (clientUtil == null) clientUtil = new EVCacheClientUtil(_appName, _pool.getOperationTimeout().get());
            latch = clientUtil.add(evcKey, cd, evcacheValueTranscoder, timeToLive, policy, clients, latchCount, fixup);
            if (event != null) {
                event.setTTL(timeToLive);
                event.setCachedData(cd);
                if (_eventsUsingLatchFP.get()) {
                    latch.setEVCacheEvent(event);
                    if (latch instanceof EVCacheLatchImpl)
                        ((EVCacheLatchImpl) latch).scheduledFutureValidation();
                } else {
                    endEvent(event);
                }
            }

            return latch;
        } catch (Exception ex) {
            status = EVCacheMetricsFactory.ERROR;
            if (log.isDebugEnabled() && shouldLog()) log.debug("Exception adding the data for APP " + _appName + ", key : " + evcKey, ex);
            if (event != null) {
                event.setStatus(status);
                eventError(event, ex);
            }
            if (!throwExc) return new EVCacheLatchImpl(policy, 0, _appName);
            throw new EVCacheException("Exception adding data for APP " + _appName + ", key : " + evcKey, ex);
        } finally {
            final long duration = EVCacheMetricsFactory.getInstance().getRegistry().clock().wallTime()- start;
            getTimer(Call.ADD.name(), EVCacheMetricsFactory.WRITE, null, status, 1, maxWriteDuration.get().intValue(), null).record(duration, TimeUnit.MILLISECONDS);
            if (log.isDebugEnabled() && shouldLog()) log.debug("ADD : APP " + _appName + ", Took " + duration + " milliSec for key : " + evcKey);
        }
    }