Examples with HashRingProvider com.linkedin.d2.balancer.util.hashing.HashRingProvider used on opensource projects

Example 1 with HashRingProvider

use of com.linkedin.d2.balancer.util.hashing.HashRingProvider in project rest.li by linkedin.

the class RingBasedURIMapperTest method testNeedScatterGather.

@Test
public void testNeedScatterGather() throws ServiceUnavailableException {
    // Both sticky and partitioned
    HashRingProvider ringProvider = createStaticHashRingProvider(100, 10, getHashFunction(true));
    PartitionInfoProvider infoProvider = createRangeBasedPartitionInfoProvider(10);
    URIMapper mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    Assert.assertTrue(mapper.needScatterGather(TEST_SERVICE));
    // Only sticky
    ringProvider = createStaticHashRingProvider(100, 1, getHashFunction(true));
    infoProvider = createRangeBasedPartitionInfoProvider(1);
    mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    Assert.assertTrue(mapper.needScatterGather(TEST_SERVICE));
    // Only partitioned
    ringProvider = createStaticHashRingProvider(100, 10, getHashFunction(false));
    infoProvider = createRangeBasedPartitionInfoProvider(10);
    mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    Assert.assertTrue(mapper.needScatterGather(TEST_SERVICE));
    // neither
    ringProvider = createStaticHashRingProvider(100, 1, getHashFunction(false));
    infoProvider = createRangeBasedPartitionInfoProvider(1);
    mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    Assert.assertFalse(mapper.needScatterGather(TEST_SERVICE));
}

Example 2 with HashRingProvider

use of com.linkedin.d2.balancer.util.hashing.HashRingProvider in project rest.li by linkedin.

the class RingBasedURIMapperTest method testPartitionIdOverride.

@Test(dataProvider = "stickyPartitionPermutation")
public void testPartitionIdOverride(boolean sticky, boolean partitioned) throws Exception {
    int partitionCount = partitioned ? 10 : 1;
    int totalHostCount = 100;
    HashRingProvider ringProvider = createStaticHashRingProvider(totalHostCount, partitionCount, getHashFunction(sticky));
    PartitionInfoProvider infoProvider = createRangeBasedPartitionInfoProvider(partitionCount);
    URIMapper mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    URIKeyPair<Integer> request = new URIKeyPair<>(new URI("d2://testService/1"), IntStream.range(0, partitionCount).boxed().collect(Collectors.toSet()));
    if (partitioned) {
        Assert.assertThrows(() -> mapper.mapUris(Arrays.asList(request, request)));
    }
    URIMappingResult<Integer> uriMapperResult = mapper.mapUris(Collections.singletonList(request));
    Map<URI, Set<Integer>> mappedKeys = uriMapperResult.getMappedKeys();
    Assert.assertTrue(uriMapperResult.getUnmappedKeys().isEmpty());
    Assert.assertEquals(mappedKeys.size(), partitionCount);
    Assert.assertEquals(mappedKeys.keySet().stream().map(URIMapperTestUtil::getPartitionIdForURI).collect(Collectors.toSet()).size(), partitionCount);
    for (Set<Integer> keys : mappedKeys.values()) {
        Assert.assertTrue(keys.isEmpty());
    }
}

Example 3 with HashRingProvider

use of com.linkedin.d2.balancer.util.hashing.HashRingProvider in project rest.li by linkedin.

the class RingBasedURIMapperTest method testErrorHandling.

@Test
public void testErrorHandling() throws ServiceUnavailableException, URISyntaxException {
    int partitionCount = 10;
    int totalHostCount = 100;
    HashRingProvider ringProvider = createStaticHashRingProvider(totalHostCount, partitionCount, getHashFunction(true));
    PartitionInfoProvider infoProvider = createRangeBasedPartitionInfoProvider(partitionCount);
    URIMapper mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    URIKeyPair<Integer> requestWithoutPartitionId = new URIKeyPair<>(42, new URI("d2://badService/2"));
    URIKeyPair<Integer> requestWithoutKey = new URIKeyPair<>(43, new URI("d2://badService/partitionId=3"));
    URIKeyPair<Integer> requestWithoutBoth = new URIKeyPair<>(44, new URI("d2://badService"));
    List<URIKeyPair<Integer>> requests = Arrays.asList(requestWithoutKey, requestWithoutPartitionId, requestWithoutBoth);
    URIMappingResult<Integer> result = mapper.mapUris(requests);
    Assert.assertTrue(result.getMappedKeys().isEmpty());
    Assert.assertTrue(result.getUnmappedKeys().get(-1).contains(42));
    Assert.assertTrue(result.getUnmappedKeys().get(-1).contains(43));
    Assert.assertTrue(result.getUnmappedKeys().get(-1).contains(44));
}

Example 4 with HashRingProvider

use of com.linkedin.d2.balancer.util.hashing.HashRingProvider in project rest.li by linkedin.

the class RingBasedURIMapperTest method testStickyAndPartitioning.

@Test
public void testStickyAndPartitioning() throws ServiceUnavailableException {
    int partitionCount = 10;
    int requestPerPartition = 100;
    int totalHostCount = 100;
    HashRingProvider ringProvider = createStaticHashRingProvider(totalHostCount, partitionCount, getHashFunction(true));
    PartitionInfoProvider infoProvider = createRangeBasedPartitionInfoProvider(partitionCount);
    URIMapper mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    List<URIKeyPair<Integer>> requests = testUtil.generateRequests(partitionCount, requestPerPartition);
    URIMappingResult<Integer> results = mapper.mapUris(requests);
    Map<URI, Set<Integer>> mapping = results.getMappedKeys();
    Map<Integer, Set<Integer>> unmappedKeys = results.getUnmappedKeys();
    Map<URI, Integer> hostToPartition = results.getHostPartitionInfo();
    Assert.assertTrue(unmappedKeys.isEmpty());
    Assert.assertEquals(100, mapping.size());
    Assert.assertEquals(100, hostToPartition.size());
}

Example 5 with HashRingProvider

use of com.linkedin.d2.balancer.util.hashing.HashRingProvider in project rest.li by linkedin.

the class RingBasedURIMapperTest method testMapUrisStickyRoutingOnly.

@Test
public void testMapUrisStickyRoutingOnly() throws ServiceUnavailableException, PartitionAccessException {
    int partitionCount = 1;
    int requestPerPartition = 1000;
    int totalHostCount = 100;
    HashRingProvider ringProvider = createStaticHashRingProvider(totalHostCount, partitionCount, getHashFunction(true));
    PartitionInfoProvider infoProvider = createRangeBasedPartitionInfoProvider(partitionCount);
    URIMapper mapper = new RingBasedUriMapper(ringProvider, infoProvider);
    List<URIKeyPair<Integer>> requests = testUtil.generateRequests(partitionCount, requestPerPartition);
    URIMappingResult<Integer> results1 = mapper.mapUris(requests);
    URIMappingResult<Integer> results2 = mapper.mapUris(requests);
    // Sticky routing between two runs
    Assert.assertEquals(results1.getMappedKeys(), results2.getMappedKeys());
    Assert.assertEquals(results1.getUnmappedKeys(), results2.getUnmappedKeys());
    Map<URI, Set<Integer>> mapping = results1.getMappedKeys();
    // Testing universal stickiness, take out 50 requests randomly and make sure they would be resolved to the same host as does URIMapper
    Collections.shuffle(requests);
    HashFunction<Request> hashFunction = ringProvider.getRequestHashFunction(TEST_SERVICE);
    for (int i = 0; i < 50; i++) {
        URIKeyPair<Integer> request = requests.get(i);
        int partitionId = infoProvider.getPartitionAccessor(TEST_SERVICE).getPartitionId(request.getRequestUri());
        Ring<URI> ring = ringProvider.getRings(request.getRequestUri()).get(partitionId);
        URI uri = ring.get(hashFunction.hash(new URIRequest(request.getRequestUri())));
        Assert.assertTrue(mapping.keySet().contains(uri));
    }
    // Only one partition
    Assert.assertEquals(1, new HashSet<>(results1.getHostPartitionInfo().values()).size());
    Assert.assertEquals(1, new HashSet<>(results2.getHostPartitionInfo().values()).size());
}