Examples of org.eigenbase.rel.metadata.CachingRelMetadataProvider$CacheEntry

org.wso2.carbon.clustering.hazelcast.jsr107.CacheEntry
An entry in the cache. Consists of the cached object and the timestamp when the entry is valid. If read at a later timestamp, the entry will be invalid and will be re-computed as if it did not exist. The net effect is a lazy-flushing cache.

        new DefaultRelMetadataProvider();
    list.add(defaultProvider);
    planner.registerMetadataProviders(list);
    RelMetadataProvider plannerChain = ChainedRelMetadataProvider.of(list);
    relInitial.getCluster().setMetadataProvider(
        new CachingRelMetadataProvider(plannerChain, planner));


    planner.setRoot(relInitial);
    RelNode relAfter = planner.findBestExp();


    String planBefore = NL + RelOptUtil.toString(relAfter);

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      hepPgm = hepPgmBldr.build();
      HepPlanner hepPlanner = new HepPlanner(hepPgm);


      hepPlanner.registerMetadataProviders(list);
      RelMetadataProvider chainedProvider = ChainedRelMetadataProvider.of(list);
      cluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));


      RelNode rootRel = optiqPreCboPlan;
      hepPlanner.setRoot(rootRel);
      if (!optiqPreCboPlan.getTraitSet().equals(desiredTraits)) {
        rootRel = hepPlanner.changeTraits(optiqPreCboPlan, desiredTraits);

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      List<RelMetadataProvider> list = Lists.newArrayList();
      list.add(mdProvider);
      planner.registerMetadataProviders(list);
      RelMetadataProvider chainedProvider = ChainedRelMetadataProvider.of(list);
      basePlan.getCluster().setMetadataProvider(
          new CachingRelMetadataProvider(chainedProvider, planner));


      planner.setRoot(basePlan);
      optimizedRelNode = planner.findBestExp();


      return optimizedRelNode;

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 */
public class LeastRecentlyUsedEvictionAlgorithm implements EvictionAlgorithm {


    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry lruCacheEntry = null;
        for (Object o : cache.getAll()) {
            CacheEntry cacheEntry = (CacheEntry) o;
            if (lruCacheEntry == null) {
                lruCacheEntry = cacheEntry;
            } else if (lruCacheEntry.getLastAccessed() > cacheEntry.getLastAccessed()) {
                lruCacheEntry = cacheEntry;
            }
        }
        if (lruCacheEntry != null) {
            cache.evict(lruCacheEntry.getKey());

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 */
public class MostRecentlyUsedEvictionAlgorithm implements EvictionAlgorithm {


    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry mruCacheEntry = null;
        for (Object o : cache.getAll()) {
            CacheEntry cacheEntry = (CacheEntry) o;
            if (mruCacheEntry == null) {
                mruCacheEntry = cacheEntry;
            } else if (mruCacheEntry.getLastAccessed() < cacheEntry.getLastAccessed()) {
                mruCacheEntry = cacheEntry;
            }
        }
        if (mruCacheEntry != null) {
            cache.evict(mruCacheEntry.getKey());

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public class RandomEvictionAlgorithm implements EvictionAlgorithm {
    private static Random random = new Random();


    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry lruCacheEntry = null;
        Collection all = cache.getAll();
        int evictionIndex = random.nextInt(all.size());
        int index = 0;


        for (Object anAll : all) {
            CacheEntry cacheEntry = (CacheEntry) anAll;
            if (index == evictionIndex) {
                lruCacheEntry = cacheEntry;
                break;
            }
            index++;

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