How to use

getTier

method

in

alluxio.wire.TieredIdentity

/**
 * @param other a tiered identity to compare to
 * @return whether the top tier of this tiered identity matches the top tier of other
 */
public boolean topTiersMatch(TieredIdentity other) {
 return mTiers.get(0).equals(other.getTier(0));
}

String value = null;
if (scriptIdentity != null) {
 LocalityTier scriptTier = scriptIdentity.getTier(i);
 Preconditions.checkState(scriptTier.getTierName().equals(tierName));
 value = scriptTier.getValue();

dataSource = locations.stream().map(BlockLocation::getWorkerAddress)
  .filter(addr -> addr.getTieredIdentity().equals(nearest.get())).findFirst().get();
if (mTieredIdentity.getTier(0).getTierName().equals(Constants.LOCALITY_NODE)
  && mTieredIdentity.topTiersMatch(nearest.get())) {
 dataSourceType = BlockInStreamSource.LOCAL;

@Test
public void chooseClosestTierAvoidEviction() throws Exception {
 List<BlockWorkerInfo> workers = new ArrayList<>();
 workers.add(worker(Constants.GB, Constants.MB, "node2", "rack3"));
 workers.add(worker(Constants.GB, 0, "node3", "rack2"));
 workers.add(worker(Constants.GB, 0, "node4", "rack3"));
 FileWriteLocationPolicy policy;
 WorkerNetAddress chosen;
 // local rack with enough availability
 policy = new LocalFirstAvoidEvictionPolicy(
   TieredIdentityFactory.fromString("node=node2,rack=rack3", mConf), mConf);
 chosen = policy.getWorkerForNextBlock(workers, Constants.GB);
 assertEquals("node4", chosen.getTieredIdentity().getTier(0).getValue());
}

@Test
public void chooseClosestTier() throws Exception {
 List<BlockWorkerInfo> workers = new ArrayList<>();
 workers.add(worker(Constants.GB, "node2", "rack3"));
 workers.add(worker(Constants.GB, "node3", "rack2"));
 workers.add(worker(Constants.GB, "node4", "rack3"));
 LocalFirstPolicy policy;
 WorkerNetAddress chosen;
 // local rack
 policy = LocalFirstPolicy.create(TieredIdentityFactory.fromString("node=node1,rack=rack2",
   sConf), sConf.getBoolean(PropertyKey.LOCALITY_COMPARE_NODE_IP));
 chosen = policy.getWorkerForNextBlock(workers, Constants.GB);
 assertEquals("rack2", chosen.getTieredIdentity().getTier(1).getValue());
 // local node
 policy = LocalFirstPolicy.create(TieredIdentityFactory.fromString("node=node4,rack=rack3",
   sConf),
   sConf.getBoolean(PropertyKey.LOCALITY_COMPARE_NODE_IP));
 chosen = policy.getWorkerForNextBlock(workers, Constants.GB);
 assertEquals("node4", chosen.getTieredIdentity().getTier(0).getValue());
}

/**
 * @param other a tiered identity to compare to
 * @return whether the top tier of this tiered identity matches the top tier of other
 */
public boolean topTiersMatch(TieredIdentity other) {
 return mTiers.get(0).equals(other.getTier(0));
}

String value = null;
if (scriptIdentity != null) {
 LocalityTier scriptTier = scriptIdentity.getTier(i);
 Preconditions.checkState(scriptTier.getTierName().equals(tierName));
 value = scriptTier.getValue();