Examples with Reference java.lang.ref.Reference used on opensource projects

Example 31 with Reference

use of java.lang.ref.Reference in project cdap by caskdata.

the class BaseHiveExploreService method startUp.

@Override
protected void startUp() throws Exception {
    LOG.info("Starting {}...", BaseHiveExploreService.class.getSimpleName());
    HiveConf hiveConf = getHiveConf();
    setupSparkConf();
    cliService.init(hiveConf);
    cliService.start();
    metastoreClientsExecutorService.scheduleWithFixedDelay(new Runnable() {

        @Override
        public void run() {
            Reference<? extends Supplier<IMetaStoreClient>> ref = metastoreClientReferenceQueue.poll();
            while (ref != null) {
                IMetaStoreClient client = metastoreClientReferences.remove(ref);
                if (client != null) {
                    closeMetastoreClient(client);
                }
                ref = metastoreClientReferenceQueue.poll();
            }
        }
    }, METASTORE_CLIENT_CLEANUP_PERIOD, METASTORE_CLIENT_CLEANUP_PERIOD, TimeUnit.SECONDS);
    // Schedule the cache cleanup
    scheduledExecutorService.scheduleWithFixedDelay(new Runnable() {

        @Override
        public void run() {
            runCacheCleanup();
        }
    }, cleanupJobSchedule, cleanupJobSchedule, TimeUnit.SECONDS);
}